Scoold - Stack Overflow in a JAR

Scoold is a Q&A and a knowledge sharing platform for teams. The project was created back in 2008, released in 2012 as social network for schools inspired by Stack Overflow. In 2017 it was refactored, repackaged and open-sourced.

Scoold can run anywhere - Heroku, DigitalOcean, AWS, Azure or any VPS hosting provider. It's lightweight (~7000 LOC), the backend is handled by a separate service called Para. All the heavy lifting is delegated to Para which can also be configured to store the data in any of the popular databases. This makes the Scoold code base easy to read and can be learned quickly, even by junior developers.

Scoold Pro, the paid version of Scoold, has premium features which make it the perfect knowledge sharing platform for your company or team.

This project is fully funded and supported by Erudika - an independent, bootstrapped company.

Features

• Full featured Q&A platform
• Database-agnostic, optimized for cloud deployment
• Full-text search
• Distributed object cache
• Location-based search and "near me" filtering of posts
• I18n with RTL language support
• Reputation and voting system with badges
• Custom badges - add your own text, icon and color
• Spaces (Teams) - groups of isolated questions and users
• Webhooks with signature signing
• Zapier integration
• Minimal frontend JS code based on jQuery
• Modern, responsive layout powered by Materialize CSS
• Suggestions for similar questions and hints for duplicate posts
• Email notifications for post replies and comments
• Backup and Restore
• RESTful API defined with OpenAPI 3.0
• Spring Boot project (single JAR)
• Mutual authentication support (mTLS)
• LDAP authentication support
• Social login (Facebook, Google, GitHub, LinkedIn, Microsoft, Slack, Amazon, Twitter) with Gravatar support
• Syntax highlighting for code in posts, GFM markdown support with tables, task lists and strikethrough
• Import data from Stack Overflow for Teams
• Emojis! - using this cheat sheet or inline Unicode
• Support for uploading custom avatars (to Imgur, Cloudinary)
• SEO friendly
• Cookie consent (for GDPR, CCPA, etc.)

Buy Scoold Pro and also get these premium features:

• Slack integration
• Mattermost integration
• Microsoft Teams integration
• SAML authentication support
• Custom authentication support
• SCIM 2.0 for automatic user provisioning
• Mentions with notifications
• File uploads (local, AWS S3, Azure Blob)
• Account suspensions (permabans)
• Anonymous posts
• Unlimited spaces
• Multiple admins
• Multiple identity domains
• Sticky / Favorite posts
• Advanced syntax highlighting
• Email digest of recent questions
• Security notifications
• Wiki-style answers

...and more!

Live Demos

Scoold Demo | Scoold Pro Demo

For admin access, open the Scoold Pro demo and login with "Demo login".

Scoold architecture intro (or 'what the heck is Para?')

Scoold is a client application of the Para backend server. Almost every request to Scoold produces at least one request to Para as well. When you ask a question on Scoold, a create request is sent to Para to the location POST /v1/questions. Here are a few key points about that architecture:

• A Para server can be hosted anywhere and store data inside any of the supported databases.
• Para is a multi-tenant server which stores data in isolated environments called "apps".
• One or more instance of Scoold (like a cluster) can connect to the same Para app environment and share the data.
• Multiple separate Scoold websites can be powered by the same Para backend using different Para apps.
• Each app environment is completely independent from others and has its own database table and search index.
• Both Scoold and Para can be hosted on the same machine or on multiple machines, on different networks.
• Scoold talks to Para via HTTP(S) so Para must be directly accessible from Scoold, but can also be hosted on a private network.

Here's an overview of the architecture:

                              ┌────────────┐
                          ┌───►  Database  │
┌──────────┐  ┌────────┐  │   ┌────────────┤
│ Scoold 1 ├──►        │  │   └────────────┤
├──────────┤  │  Para  ◄──┼───►   Search   │
│ Scoold 2 ├──►        │  │   ┌────────────┤
└──────────┘  └────────┘  │   └────────────┤
                          └───►   Cache    │
                              └────────────┘

Quick Start with a managed Para backend (easier)

JDK 21 or higher and Maven are required to build the project. You can build the project with JDK 11/17 until version 1.59.0, at which point Scoold switches to JDK 21 and Spring Boot 3.x.

1. Create a new app on ParaIO.com and copy your access keys to a file.
2. Create Scoold's configuration file named scoold-application.conf with these properties:

   scoold.env = "production"
   scoold.app_name = "Scoold"
   scoold.para_access_key = "app:scoold"
   scoold.para_secret_key = "_secret_key_from_para_"
   scoold.para_endpoint = "https://paraio.com"
   # add your email here
   scoold.admins = "[email protected]"
   # (optional) require authentication for viewing content
   scoold.is_default_space_public = false

3. Start Scoold with java -jar -Dconfig.file=./scoold-application.conf scoold-*.jar.
4. Open localhost:8000/signin/register and register a new account with same email you put in the configuration.

To login with a social account, you must create a developer app with Facebook, Google or any other identity provider. This is not required when you log in with LDAP, SAML or email/password.

Save the obtained API keys in the scoold-application.conf file that you have created above.

For all identity providers, you must whitelist the Para host with the appropriate authentication endpoint:

• GitHub: https://paraio.com/github_auth
• OAuth 2: https://paraio.com/oauth2_auth Learn more about custom authentication

Quick Start with a self-hosted Para backend (harder)

Note: The Para backend server is deployed separately and is required for Scoold to run.

1. Download the latest executable Para JAR package
2. Start Para with the command java -jar -Dconfig.file=./para-application.conf para-*.jar
3. Create a separate folder scoold and inside, a new configuration file named scoold-application.conf (see example above)
4. Start Scoold with the following command, pointing it to the location of the Para configuration file:

   java -jar -Dconfig.file=./scoold-application.conf \
     -Dscoold.autoinit.para_config_file=../para-application.conf scoold-*.jar`
   

On startup, Para will initialize and create its own configuration file. Scoold will then try to initialize and configure itself automatically by reading the para-application.conf. Alternatively you could provide Scoold with the root access key directly, instead of pointing it to the Para configuration file, like so:

	java -jar -Dconfig.file=./scoold-application.conf \
	  -Dscoold.autoinit.root_app_secret_key="{secret key for root app}" scoold-*.jar`

The secret key for the root Para app can be found inside the Para configuration file, or para-application.conf, labeled para.root_secret_key.

4. Open localhost:8000/signin/register and register a new account with same email you put in the configuration

Optionally, you can also install the Para CLI tool for browsing and managing data in your Scoold app.

Important:

• The convention is to use para-application.conf and scoold-application.conf for Para and Scoold respectively.
• All settings shown here are meant to be kept inside the Scoold configuration file.
• SMTP settings must be configured before deploying Scoold to production.
• Scoold does not have a default user account with default username and password.

Read the Para docs for further details on how to run and configure your Scoold backend.

Hardware requirements

Scoold and Para can both be hosted on the same machine, provided it has at least 3 GB of RAM.

Scoold requires:

• at least 500 MB RAM
• 1 vCPU or more
• 10 GB disk space or more (primarily for logs and storing images)

Para requires:

• at least 1 GB RAM
• 1 vCPU (2 are recommended)
• 10 GB disk space or more (unless the database is stored on the same machine)

JVM parameters: e.g. java -jar -Xms600m -Xmx600m scoold-*.jar

Configuration

Scoold requires a persistent and direct connection to a Para server to function properly. By default, Scoold will load its configuration from a file named application.conf but that file can be renamed to scoold-application.conf or app.conf and then loaded with the system property -Dconfig.file=app.conf. The configuration can also be loaded from a JSON file or a URL.

Copy this Scoold example configuration to your scoold-application.conf (edit the values if needed):

# the name of the application
scoold.app_name = "Scoold"
# the port for Scoold
scoold.port = 8000
# environment - "production" or "development"
scoold.env = "production"
# the public-facing URL where Scoold is hosted
scoold.host_url = "http://localhost:8000"
# the URL of Para - can also be "https://paraio.com"
scoold.para_endpoint = "http://localhost:8080"
# access key for your Para app
scoold.para_access_key = "app:scoold"
# secret key for your Para app
scoold.para_secret_key = ""
# the email or identifier of the admin user - check Para user object
scoold.admins = "[email protected]"
# Enable/disable password authentication
scoold.password_auth_enabled = true

View ALL Scoold configuration options

Core

Property key & Description	Default Value	Type
scoold.app_name The formal name of the web application.	Scoold	String
scoold.para_access_key requires restart App identifier (access key) of the Para app used by Scoold.	app:scoold	String
scoold.para_secret_key requires restart Secret key of the Para app used by Scoold.	x	String
scoold.para_endpoint requires restart The URL of the Para server for Scoold to connects to. For hosted Para, use https://paraio.com	http://localhost:8080	String
scoold.host_url The internet-facing (public) URL of this Scoold server.	http://localhost:8000	String
scoold.port requires restart The network port of this Scoold server. Port number should be a number above 1024.	8000	Integer
scoold.env requires restart The environment profile to be used - possible values are production or development	development	String
scoold.app_secret_key A random secret string, min. 32 chars long. Must be different from the secret key of the Para app. Used for generating JWTs and passwordless authentication tokens.		String
scoold.admins A comma-separated list of emails of people who will be promoted to administrators with full rights over the content on the site. This can also contain Para user identifiers.		String
scoold.is_default_space_public When enabled, all content in the default space will be publicly visible, without authentication, incl. users and tags. Disable to make the site private.	true	Boolean
scoold.context_path requires restart The context path (subpath) of the web application, defaults to the root path /.		String
scoold.webhooks_enabled Enable/disable webhooks support for events like question.create, user.signup, etc.	true	Boolean
scoold.api_enabled Enable/disable the Scoold RESTful API. Disabled by default.	false	Boolean
scoold.feedback_enabled Enable/disable the feedback page on the site. It is intended for internal discussion about the website itself.	false	Boolean

Emails

Property key & Description	Default Value	Type
scoold.support_email The email address to use for sending transactional emails, like welcome/password reset emails.	[email protected]	String
scoold.mail.host The SMTP server host to use for sending emails.		String
scoold.mail.port The SMTP server port to use for sending emails.	587	Integer
scoold.mail.username The SMTP server username.		String
scoold.mail.password The SMTP server password.		String
scoold.mail.tls Enable/disable TLS for the SMTP connection.	true	Boolean
scoold.mail.ssl Enable/disable SSL for the SMTP connection.	false	Boolean
scoold.mail.debug Enable/disable debug information when sending emails through SMTP.	false	Boolean
scoold.favtags_emails_enabled Set the default toggle value for all users for receiving emails for new content with their favorite tags.	false	Boolean
scoold.reply_emails_enabled Set the default toggle value for all users for receiving emails for answers to their questions.	false	Boolean
scoold.comment_emails_enabled Set the default toggle value for all users for receiving emails for comments on their posts.	false	Boolean
scoold.summary_email_period_days Pro The time period between each content digest email, in days.	7	Integer
scoold.summary_email_items The number of posts to include in the digest email (a summary of new posts).	25	Integer
scoold.notification_emails_allowed Enable/disable all notification emails.	true	Boolean
scoold.newpost_emails_allowed Enable/disable all email notifications for every new question that is posted on the site.	true	Boolean
scoold.favtags_emails_allowed Enable/disable all email notifications for every new question tagged with a favorite tag.	true	Boolean
scoold.reply_emails_allowed Enable/disable all email notifications for every new answer that is posted on the site.	true	Boolean
scoold.comment_emails_allowed Enable/disable all email notifications for every new comment that is posted on the site.	true	Boolean
scoold.mentions_emails_allowed Pro Enable/disable all email notifications every time a user is mentioned.	true	Boolean
scoold.summary_email_controlled_by_admins Pro Controls whether admins can enable/disable summary emails for everyone from the 'Settings' page	false	Boolean
scoold.mention_emails_controlled_by_admins Pro Controls whether admins can enable/disable mention emails for everyone from the 'Settings' page	false	Boolean
scoold.emails.welcome_text1 Allows for changing the default text (first paragraph) in the welcome email message.	You are now part of {0} - a friendly Q&A community...	String
scoold.emails.welcome_text2 Allows for changing the default text (second paragraph) in the welcome email message.	To get started, simply navigate to the "Ask question" page and ask a question...	String
scoold.emails.welcome_text3 Allows for changing the default text (signature at the end) in the welcome email message.	Best, <br>The {0} team	String
scoold.emails.default_signature The default email signature for all transactional emails sent from Scoold.	Best, <br>The {0} team	String

Security

Property key & Description	Default Value	Type
scoold.approved_domains_for_signups A comma-separated list of domain names, which will be used to restrict the people who are allowed to sign up on the site.		String
scoold.security.allow_unverified_emails Enable/disable email verification after the initial user registration. Users with unverified emails won't be able to sign in, unless they use a social login provider.	false	Boolean
scoold.session_timeout The validity period of the authentication cookie, in seconds. Default is 24h.	86400	Integer
scoold.jwt_expires_after The validity period of the session token (JWT), in seconds. Default is 24h.	86400	Integer
scoold.security.one_session_per_user If disabled, users can sign in from multiple locations and devices, keeping a few open sessions at once. Otherwise, only one session will be kept open, others will be closed.	true	Boolean
scoold.min_password_length The minimum length of passwords.	8	Integer
scoold.min_password_strength The minimum password strength - one of 3 levels: 1 good enough, 2 strong, 3 very strong.	2	Integer
scoold.pass_reset_timeout The validity period of the password reset token sent via email for resetting users' passwords. Default is 30 min.	1800	Integer
scoold.profile_anonimity_enabled Enable/disable the option for users to anonimize their profiles on the site, hiding their name and picture.	false	Boolean
scoold.signup_captcha_site_key The reCAPTCHA v3 site key for protecting the signup and password reset pages.		String
scoold.signup_captcha_secret_key The reCAPTCHA v3 secret.		String
scoold.csp_reports_enabled Enable/disable automatic reports each time the Content Security Policy is violated.	false	Boolean
scoold.csp_header_enabled Enable/disable the Content Security Policy (CSP) header.	true	Boolean
scoold.csp_header The CSP header value which will overwrite the default one. This can contain one or more {{nonce}} placeholders, which will be replaced with an actual nonce on each request.		String
scoold.hsts_header_enabled Enable/disable the Strict-Transport-Security security header.	true	Boolean
scoold.framing_header_enabled Enable/disable the X-Frame-Options security header.	true	Boolean
scoold.xss_header_enabled Enable/disable the X-XSS-Protection security header.	true	Boolean
scoold.contenttype_header_enabled Enable/disable the X-Content-Type-Options security header.	true	Boolean
scoold.referrer_header_enabled Enable/disable the Referrer-Policy security header.	true	Boolean
scoold.permissions_header_enabled Enable/disable the Permissions-Policy security header.	true	Boolean
scoold.csp_connect_sources Additional sources to add to the connect-src CSP directive. Used when adding external scripts to the site.		String
scoold.csp_frame_sources Additional sources to add to the frame-src CSP directive. Used when adding external scripts to the site.		String
scoold.csp_font_sources Additional sources to add to the font-src CSP directive. Used when adding external fonts to the site.		String
scoold.csp_style_sources Additional sources to add to the style-src CSP directive. Used when adding external fonts to the site.		String

Basic Authentication

Property key & Description	Default Value	Type
scoold.password_auth_enabled Enabled/disable the ability for users to sign in with an email and password.	true	Boolean
scoold.fb_app_id Facebook OAuth2 app ID.		String
scoold.fb_secret Facebook app secret key.		String
scoold.gp_app_id Google OAuth2 app ID.		String
scoold.gp_secret Google app secret key.		String
scoold.in_app_id LinkedIn OAuth2 app ID.		String
scoold.in_secret LinkedIn app secret key.		String
scoold.tw_app_id Twitter OAuth app ID.		String
scoold.tw_secret Twitter app secret key.		String
scoold.gh_app_id GitHub OAuth2 app ID.		String
scoold.gh_secret GitHub app secret key.		String
scoold.ms_app_id Microsoft OAuth2 app ID.		String
scoold.ms_secret Microsoft app secret key.		String
scoold.ms_tenant_id Microsoft OAuth2 tenant ID	common	String
scoold.az_app_id Amazon OAuth2 app ID.		String
scoold.az_secret Amazon app secret key.		String
scoold.sl_app_id Pro Slack OAuth2 app ID.		String
scoold.sl_secret Pro Slack app secret key.		String
scoold.mm_app_id Pro Mattermost OAuth2 app ID.		String
scoold.mm_secret Pro Mattermost app secret key.		String
scoold.security.custom.provider Pro The text on the button for signing in with the custom authentication scheme.	Continue with Acme Co.	String
scoold.security.custom.login_url Pro The URL address of an externally hosted, custom login page.		String

LDAP Authentication

Property key & Description	Default Value	Type
scoold.security.ldap.server_url LDAP server URL. LDAP will be disabled if this is blank.		String
scoold.security.ldap.base_dn LDAP base DN.		String
scoold.security.ldap.user_search_base LDAP search base, which will be used only if a direct bind is unsuccessfull.		String
scoold.security.ldap.user_search_filter LDAP search filter, for finding users if a direct bind is unsuccessful.	(cn={0})	String
scoold.security.ldap.user_dn_pattern LDAP user DN pattern, which will be comined with the base DN to form the full path to theuser object, for a direct binding attempt.	uid={0}	String
scoold.security.ldap.ad_mode_enabled Enable/disable support for authenticating with Active Directory. If true, AD is enabled.	false	Boolean
scoold.security.ldap.active_directory_domain AD domain name. Add this only if you are connecting to an Active Directory server.		String
scoold.security.ldap.password_attribute LDAP password attribute name.	userPassword	String
scoold.security.ldap.bind_dn LDAP bind DN		String
scoold.security.ldap.bind_pass LDAP bind password.		String
scoold.security.ldap.username_as_name Enable/disable the use of usernames for names on Scoold.	false	Boolean
scoold.security.ldap.provider Pro The text on the LDAP sign in button.	Continue with LDAP	String
scoold.security.ldap.mods_group_node Moderators group mapping, mapping LDAP users with this node, to moderators on Scoold.		String
scoold.security.ldap.admins_group_node Administrators group mapping, mapping LDAP users with this node, to administrators on Scoold.		String
scoold.security.ldap.compare_passwords LDAP compare passwords.		String
scoold.security.ldap.password_param LDAP password parameter name.	password	String
scoold.security.ldap.username_param LDAP username parameter name.	username	String
scoold.security.ldap.is_local Pro Enable/disable local handling of LDAP requests, instead of sending those to Para.	false	Boolean

SAML Authentication

Property key & Description	Default Value	Type
scoold.security.saml.idp.metadata_url Pro SAML metadata URL. Scoold will fetch most of the necessary information for the authentication request from that XML document. This will overwrite all other IDP settings.		String
scoold.security.saml.sp.entityid Pro SAML SP endpoint address - e.g. https://paraio.com/saml_auth/scoold. The IDP will call this address for authentication.		String
scoold.security.saml.sp.x509cert Pro SAML client x509 certificate for the SP (public key). Value must be Base64-encoded.		String
scoold.security.saml.sp.privatekey Pro SAML client private key in PKCS#8 format for the SP. Value must be Base64-encoded.		String
scoold.security.saml.attributes.id Pro SAML attribute name of the user id.	UserID	String
scoold.security.saml.attributes.picture Pro SAML attribute name of the user picture.	Picture	String
scoold.security.saml.attributes.email Pro SAML attribute name of the user email.	EmailAddress	String
scoold.security.saml.attributes.name Pro SAML attribute name of the user name.	GivenName	String
scoold.security.saml.attributes.firstname Pro SAML attribute name of the user firstname.	FirstName	String
scoold.security.saml.attributes.lastname Pro SAML attribute name of the user lastname.	LastName	String
scoold.security.saml.provider Pro The text on the button for signing in with SAML.	Continue with SAML	String
scoold.security.saml.sp.assertion_consumer_service.url Pro SAML ACS URL.		String
scoold.security.saml.sp.nameidformat Pro SAML name id format.	urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified	String
scoold.security.saml.idp.entityid Pro SAML IDP entity id for manually setting the endpoint address of the IDP, instead of getting it from the provided metadata URL.		String
scoold.security.saml.idp.single_sign_on_service.url Pro SAML SSO service URL of the IDP.		String
scoold.security.saml.idp.x509cert Pro SAML server x509 certificate for the IDP (public key). Value must be Base64-encoded.		String
scoold.security.saml.security.authnrequest_signed Pro Enable/disable SAML authentication request signing.	false	Boolean
scoold.security.saml.security.want_messages_signed Pro Enable/disable SAML message signing.	false	Boolean
scoold.security.saml.security.want_assertions_signed Pro Enable/disable SAML assertion signing.	false	Boolean
scoold.security.saml.security.want_assertions_encrypted Pro Enable/disable SAML assertion encryption.	false	Boolean
scoold.security.saml.security.want_nameid_encrypted Pro Enable/disable SAML NameID encryption.	false	Boolean
scoold.security.saml.security.want_nameid Pro Enable/disable SAML NameID requirement.	true	Boolean
scoold.security.saml.security.sign_metadata Pro Enable/disable SAML metadata signing.	false	Boolean
scoold.security.saml.security.want_xml_validation Pro Enable/disable SAML XML validation.	true	Boolean
scoold.security.saml.security.signature_algorithm Pro SAML signature algorithm.		String
scoold.security.saml.domain Pro SAML domain name.	paraio.com	String
scoold.security.saml.is_local Pro Enable/disable local handling of SAML requests, instead of sending those to Para.	false	Boolean

OAuth 2.0 Authentication

Property key & Description	Default Value	Type
scoold.oa2_app_id OAauth 2.0 client app identifier. Alternatives: oa2second_app_id, oa2third_app_id		String
scoold.oa2_secret OAauth 2.0 client app secret key. Alternatives: oa2second_secret, oa2third_secret		String
scoold.security.oauth.authz_url OAauth 2.0 client app authorization URL (login page). Alternatives: security.oauthsecond.authz_url, security.oauththird.authz_url		String
scoold.security.oauth.token_url OAauth 2.0 client app token endpoint URL. Alternatives: security.oauthsecond.token_url, security.oauththird.token_url		String
scoold.security.oauth.profile_url OAauth 2.0 client app user info endpoint URL. Alternatives: security.oauthsecond.profile_url, security.oauththird.profile_url		String
scoold.security.oauth.scope OAauth 2.0 client app scope. Alternatives: security.oauthsecond.scope, security.oauththird.scope	openid email profile	String
scoold.security.oauth.accept_header OAauth 2.0 Accept header customization. Alternatives: security.oauthsecond.accept_header, security.oauththird.accept_header		String
scoold.security.oauth.parameters.id OAauth 2.0 attribute mapping for id. Alternatives: security.oauthsecond.parameters.id, security.oauththird.parameters.id	sub	String
scoold.security.oauth.parameters.name OAauth 2.0 attribute mapping for name. Alternatives: security.oauthsecond.parameters.name, security.oauththird.parameters.name	name	String
scoold.security.oauth.parameters.given_name OAauth 2.0 attribute mapping for given_name. Alternatives: security.oauthsecond.parameters.given_name, security.oauththird.parameters.given_name	given_name	String
scoold.security.oauth.parameters.family_name OAauth 2.0 attribute mapping for family_name. Alternatives: security.oauthsecond.parameters.family_name, security.oauththird.parameters.family_name	family_name	String
scoold.security.oauth.parameters.email OAauth 2.0 attribute mapping for email. Alternatives: security.oauthsecond.parameters.email, security.oauththird.parameters.email	email	String
scoold.security.oauth.parameters.picture OAauth 2.0 attribute mapping for picture. Alternatives: security.oauthsecond.parameters.picture, security.oauththird.parameters.picture	picture	String
scoold.security.oauth.download_avatars Enable/disable OAauth 2.0 avatar downloading to local disk. Used when avatars are large in size. Alternatives: security.oauthsecond.download_avatars, security.oauththird.download_avatars	false	Boolean
scoold.security.oauth.token_delegation_enabled Pro Enable/disable OAauth 2.0 token delegation. The ID and access tokens will be saved and delegated to Scoold from Para. Alternatives: security.oauthsecond.token_delegation_enabled, security.oauththird.token_delegation_enabled	false	Boolean
scoold.security.oauth.spaces_attribute_name Pro OAauth 2.0 attribute mapping for users' spaces. The spaces can be comma-separated. Alternatives: security.oauthsecond.spaces_attribute_name, security.oauththird.spaces_attribute_name	spaces	String
scoold.security.oauth.groups_attribute_name Pro OAauth 2.0 attribute mapping for users' groups. Use this for mapping admin, mod and user roles to Scoold users.Alternatives: security.oauthsecond.groups_attribute_name, security.oauththird.groups_attribute_name		String
scoold.security.oauth.mods_equivalent_claim_value Pro OAauth 2.0 claim used for mapping OAuth2 users having it, to moderators on Scoold. Alternatives: security.oauthsecond.mods_equivalent_claim_value, security.oauththird.mods_equivalent_claim_value	mod	String
scoold.security.oauth.admins_equivalent_claim_value Pro OAauth 2.0 claim used for mapping OAuth2 users having it, to administrators on Scoold. Alternatives: security.oauthsecond.admins_equivalent_claim_value, security.oauththird.admins_equivalent_claim_value	admin	String
scoold.security.oauth.users_equivalent_claim_value Pro OAauth 2.0 claim used for denying access to OAuth2 users not having it, unlessthey already have the admin or moderator roles assigned. Alternatives: security.oauthsecond.users_equivalent_claim_value, security.oauththird.users_equivalent_claim_value		String
scoold.security.oauth.domain OAauth 2.0 domain name for constructing user email addresses in case they are missing. Alternatives: security.oauthsecond.domain, security.oauththird.domain		String
scoold.security.oauth.provider The text on the button for signing in with OAuth2 or OIDC.	Continue with OpenID Connect	String
scoold.security.oauth.appid_in_state_param_enabled Enable/disable the use of the OAauth 2.0 state parameter to designate your Para app id. Some OAauth 2.0 servers throw errors if the length of the state parameter is less than 8 chars.	true	Boolean
scoold.security.oauth.send_scope_to_token_endpoint Enable/disable sending the OAauth 2.0 scope parameter in the token request. Some OAuth 2.0 servers require this to be turned off.	true	Boolean

Posts

Property key & Description	Default Value	Type
scoold.new_users_can_comment Enable/disable the ability for users with reputation below 100 to comments on posts.	true	Boolean
scoold.posts_need_approval Enable/disable the need for approval of new posts (both questions and answers) by a moderator.	false	Boolean
scoold.answers_approved_by Controls who is able to mark an answer as accepted. Possible values are default (author and moderators), admins (admins only), moderators (moderators and admins).	default	String
scoold.answers_need_approval Enable/disable the need for approval of new answers by a moderator.	false	Boolean
scoold.wiki_answers_enabled Pro Enable/disable the ability for users to create wiki-style answers, editable by everyone.	true	Boolean
scoold.media_recording_allowed Pro Enable/disable support for attaching recorded videos and voice messages to posts.	true	Boolean
scoold.delete_protection_enabled Enable/disable the ability for authors to delete their own question, when it already has answers and activity.	true	Boolean
scoold.max_text_length The maximum text length of each post (question or answer). Longer content will be truncated.	20000	Integer
scoold.max_tags_per_post The maximum number of tags a question can have. The minimum is 0 - then the default tag is used.	5	Integer
scoold.min_tags_per_post The minimum number of tags a question must have. The minimum is 0.	0	Integer
scoold.tag_creation_allowed Enable/disable tag creation by normal users. If disabled, only admins and moderators can create new tags.	true	Boolean
scoold.max_replies_per_post The maximum number of answers a question can have.	500	Integer
scoold.max_comments_per_id The maximum number of comments a post can have.	1000	Integer
scoold.max_comment_length The maximum length of each comment.	600	Integer
scoold.max_mentions_in_posts Pro The maximum number of mentioned users a post can have.	10	Integer
scoold.anonymous_posts_enabled Pro Enable/disable the ability for unathenticated users to create new questions.	false	Boolean
scoold.nearme_feature_enabled Enable/disable the ability for users to attach geolocation data to questions and location-based filtering of questions.	false	Boolean
scoold.merge_question_bodies Enable/disable the merging of question bodies when two questions are merged into one.	true	Boolean
scoold.max_similar_posts The maximum number of similar posts which will be displayed on the side.	7	Integer
scoold.default_question_tag The default question tag, used when no other tags are provided by its author.		String
scoold.posts_rep_threshold The minimum reputation an author needs to create a post without approval by moderators. This is only required if new posts need apporval.	100	Integer

Spaces

Property key & Description	Default Value	Type
scoold.auto_assign_spaces A comma-separated list of spaces to assign to all new users.		String
scoold.reset_spaces_on_new_assignment Spaces delegated from identity providers will overwrite the existing ones for users.	true	Boolean
scoold.mods_access_all_spaces By default, moderators have access to and can edit content in all spaces. When disabled, moderators can only access the spaces they are assigned to by admins.	true	Boolean

Reputation and Rewards

Property key & Description	Default Value	Type
scoold.answer_voteup_reward_author Reputation points given to author of answer as reward when a user upvotes it.	10	Integer
scoold.question_voteup_reward_author Reputation points given to author of question as reward when a user upvotes it.	5	Integer
scoold.voteup_reward_author Reputation points given to author of comment or other post as reward when a user upvotes it.	2	Integer
scoold.answer_approve_reward_author Reputation points given to author of answer as reward when the question's author accepts it.	10	Integer
scoold.answer_approve_reward_voter Reputation points given to author of question who accepted an answer.	3	Integer
scoold.answer_create_reward_author Reputation points given to author who added an answer to a question (awarded once per question).	5	Integer
scoold.post_votedown_penalty_author Reputation points taken from author of post as penalty when their post was downvoted.	3	Integer
scoold.post_votedown_penalty_voter Reputation points taken from the user who downvotes any content. Discourages downvoting slightly.	1	Integer
scoold.voter_ifhas Number of votes (up or down) needed from a user for earning the voter badge.	100	Integer
scoold.commentator_ifhas Number of comments a user needs to have posted for earning the commentator badge.	100	Integer
scoold.critic_ifhas Number of cast downvotes needed from a user for earning the critic badge.	10	Integer
scoold.supporter_ifhas Number of cast upvotes needed from a user for earning the supporter badge.	50	Integer
scoold.goodquestion_ifhas Votes needed on a question before its author gets to earn the good question badge.	20	Integer
scoold.goodanswer_ifhas Votes needed on an answer before its author gets to earn the good answer badge.	10	Integer
scoold.enthusiast_ifhas Reputation points needed for earning the enthusiast badge.	100	Integer
scoold.freshman_ifhas Reputation points needed for earning the freshman badge.	300	Integer
scoold.scholar_ifhas Reputation points needed for earning the scholar badge.	500	Boolean
scoold.teacher_ifhas Reputation points needed for earning the teacher badge.	1000	Integer
scoold.geek_ifhas Reputation points needed for earning the geek badge.	9000	Integer

File Storage

Property key & Description	Default Value	Type
scoold.uploads_enabled Pro Enable/disable file uploads.	true	Boolean
scoold.file_uploads_dir Pro The directory (local or in the cloud) where files will be stored.	uploads	String
scoold.uploads_require_auth Pro Enable/disable the requirement that uploaded files can only be accessed by authenticated users.	false	Boolean
scoold.allowed_upload_formats Pro A comma-separated list of allowed MIME types in the format extension:mime_type, e.g.py:text/plain or just the extensions py,yml		String
scoold.s3_bucket Pro AWS S3 bucket name as target for storing files.		String
scoold.s3_path Pro AWS S3 object prefix (directory) inside the bucket.		String
scoold.s3_region Pro AWS S3 region.		String
scoold.s3_endpoint Pro AWS S3 endpoint override. The S3 region will be ignored if this is set. Can be used for connecting to S3-compatible storage providers.		String
scoold.s3_access_key Pro AWS S3 access key.		String
scoold.s3_secret_key Pro AWS S3 secret key.		String
scoold.blob_storage_account Pro Azure Blob Storage account ID.		String
scoold.blob_storage_token Pro Azure Blob Storage token.		String
scoold.blob_storage_container Pro Azure Blob Storage container.		String
scoold.blob_storage_path Pro Azure Blob Storage path prefix (subfolder) within a container.		String

Customization

Property key & Description	Default Value	Type
scoold.default_language_code The default language code to use for the site. Set this to make the site load a different language from English.		String
scoold.welcome_message Adds a brief intro text inside a banner at the top of the main page for new visitors to see.Not shown to authenticated users.		String
scoold.welcome_message_onlogin Adds a brief intro text inside a banner at the top of the page. Shown to authenticated users only.		String
scoold.welcome_message_prelogin Adds a brief intro text inside a banner at the top of the page. Shown only on the 'Sign in' page.		String
scoold.dark_mode_enabled Enable/disable the option for users to switch to the dark theme.	true	Boolean
scoold.meta_description The content inside the description <meta> tag.	Scoold is friendly place for knowledge sharing and collaboration...	String
scoold.meta_keywords The content inside the keywords <meta> tag.	knowledge base, knowledge sharing, collaboration, wiki...	String
scoold.show_branding Enable/disable the 'Powered by Scoold' branding in the footer.	true	Boolean
scoold.mathjax_enabled Pro Enable/disable support for MathJax and LaTeX for scientific expressions in Markdown.	false	Boolean
scoold.gravatars_enabled Enable/disable support for Gravatars.	true	Boolean
scoold.gravatars_pattern The pattern to use when displaying empty/anonymous gravatar pictures.	retro	String
scoold.avatar_repository preview The avatar repository - one of imgur, cloudinary.		String
scoold.footer_html Some custom HTML content to be added to the website footer.		String
scoold.navbar_link1_url The URL of an extra custom link which will be added to the top navbar.		String
scoold.navbar_link1_text The title of an extra custom link which will be added to the top navbar.	Link1	String
scoold.navbar_link1_target The target attribute of an extra custom link which will be added to the top navbar.		String
scoold.navbar_link2_url The URL of an extra custom link which will be added to the top navbar.		String
scoold.navbar_link2_text The title of an extra custom link which will be added to the top navbar.	Link2	String
scoold.navbar_link2_target The target attribute of an extra custom link which will be added to the top navbar.		String
scoold.navbar_menu_link1_url The URL of an extra custom link which will be added to user's dropdown menu. Only shown to authenticated users.		String
scoold.navbar_menu_link1_text The title of an extra custom link which will be added to the user's dropdown menu.	Menu Link1	String
scoold.navbar_menu_link1_target The target attribute of an extra custom link which will be added to user's dropdown menu.		String
scoold.navbar_menu_link2_url The URL of an extra custom link which will be added to user's dropdown menu. Only shown to authenticated users.		String
scoold.navbar_menu_link2_text The title of an extra custom link which will be added to the user's dropdown menu.	Menu Link2	String
scoold.navbar_menu_link2_target The target attribute of an extra custom link which will be added to the user's dropdown menu.		String
scoold.always_hide_comment_forms Enable/disable a visual tweak which keeps all comment text editors closed at all times.	true	Boolean
scoold.footer_links_enabled Enable/disable all links in the website footer.	true	Boolean
scoold.emails_footer_html The HTML code snippet to embed at the end of each transactional email message.	<a href="{host_url}">{app_name}</a> &bull; <a href="https://scoold.com">Powered by Scoold</a>	String
scoold.cookie_consent_required Enable/disable the cookie consent popup box and blocks all external JS scripts from loading. Used for compliance with GDPR/CCPA.	false	Boolean
scoold.fixed_nav Enable/disable a fixed navigation bar.	false	Boolean
scoold.logo_width The width of the logo image in the nav bar, in pixels. Used for fine adjustments to the logo size.	100	Integer
scoold.code_highlighting_enabled Enable/disable support for syntax highlighting in code blocks.	true	Boolean
scoold.max_pages Maximum number of pages to return as results.	1000	Integer
scoold.numeric_pagination_enabled Enable/disable the numeric pagination style (< 1 2 3...N >).	false	Boolean
scoold.html_in_markdown_enabled Enable/disable the ability for users to insert basic HTML tags inside Markdown content.	false	Boolean
scoold.max_items_per_page Maximum number of results to return in a single page of results.	30	Integer
scoold.avatar_edits_enabled Enable/disable the ability for users to edit their profile pictures.	true	Boolean
scoold.name_edits_enabled Enable/disable the ability for users to edit their name.	true	Boolean

Frontend Assets

Property key & Description	Default Value	Type
scoold.logo_url The URL of the logo in the nav bar. Use a PNG, SVG, JPG or WebP format.	/images/logo.svg	String
scoold.logo_dark_url The URL of the logo in the nav bar used in dark mode. Use a PNG, SVG, JPG or WebP format.	/images/logo.svg	String
scoold.small_logo_url The URL of a smaller logo (only use PNG/JPG!). Used in transactional emails and the meta og:image.	/images/logowhite.png	String
scoold.cdn_url A CDN URL where all static assets might be stored.		String
scoold.stylesheet_url A stylesheet URL of a CSS file which will be used as the main stylesheet. This will overwrite all existing CSS styles!	/styles/style.css	String
scoold.dark_stylesheet_url A stylesheet URL of a CSS file which will be used when dark mode is enabled. This will overwrite all existing dark CSS styles!	/styles/dark.css	String
scoold.external_styles A comma-separated list of external CSS files. These will be loaded after the main stylesheet.		String
scoold.external_scripts._id_ A map of external JS scripts. These will be loaded after the main JS script. For example: scoold.external_scripts.script1 = "alert('Hi')"		Map
scoold.inline_css Some short, custom CSS snippet to embed inside the <head> element.		String
scoold.favicon_url The URL of the favicon image.	/images/favicon.ico	String
scoold.meta_app_icon The URL of the app icon image in the <meta property='og:image'> tag.	/images/logowhite.png	String

Mattermost Integration

Property key & Description	Default Value	Type
scoold.mattermost.auth_enabled Pro Enable/disable authentication with Mattermost.	false	Boolean
scoold.mattermost.server_url Pro Mattermost server URL.		String
scoold.mattermost.bot_username Pro Mattermost bot username.	scoold	String
scoold.mattermost.bot_icon_url Pro Mattermost bot avatar URL.	/images/logowhite.png	String
scoold.mattermost.post_to_space Pro Default space on Scoold where questions created on Mattermost will be published. Set it to workspace for using the team's name.		String
scoold.mattermost.map_channels_to_spaces Pro Enable/disable mapping of Mattermost channels to Scoold spaces. When enabled, will create a Scoold space for each Mattermost channel.	false	Boolean
scoold.mattermost.map_workspaces_to_spaces Pro Enable/disable mapping of Mattermost teams to Scoold spaces. When enabled, will create a Scoold space for each Mattermost team.	true	Boolean
scoold.mattermost.max_notification_webhooks Pro The maximum number of incoming webhooks which can be created on Scoold. Each webhook links a Mattermost channel to Scoold.	10	Integer
scoold.mattermost.notify_on_new_answer Pro Enable/disable the ability for Scoold to send notifications to Mattermost for new answers.	true	Boolean
scoold.mattermost.notify_on_new_question Pro Enable/disable the ability for Scoold to send notifications to Mattermost for new questions.	true	Boolean
scoold.mattermost.notify_on_new_comment Pro Enable/disable the ability for Scoold to send notifications to Mattermost for new comments.	true	Boolean
scoold.mattermost.dm_on_new_comment Pro Enable/disable the ability for Scoold to send direct messages to Mattermost users for new comments.	false	Boolean
scoold.mattermost.default_question_tags Pro Default question tags for questions created on Mattermost (comma-separated list).	via-mattermost	String

Slack Integration

Property key & Description	Default Value	Type
scoold.slack.auth_enabled Pro Enable/disable authentication with Slack.	false	Boolean
scoold.slack.app_id Pro The Slack app ID (first ID from the app's credentials, not the OAuth2 Client ID).		String
scoold.slack.signing_secret Pro Slack signing secret key for verifying request signatures.	x	String
scoold.slack.max_notification_webhooks Pro The maximum number of incoming webhooks which can be created on Scoold. Each webhook links a Slack channel to Scoold.	10	Integer
scoold.slack.map_channels_to_spaces Pro Enable/disable mapping of Slack channels to Scoold spaces. When enabled, will create a Scoold space for each Slack channel.	false	Boolean
scoold.slack.map_workspaces_to_spaces Pro Enable/disable mapping of Slack teams to Scoold spaces. When enabled, will create a Scoold space for each Slack team.	true	Boolean
scoold.slack.post_to_space Pro Default space on Scoold where questions created on Slack will be published. Set it to workspace for using the team's name.		String
scoold.slack.default_title Pro Default question title for questions created on Slack.	A question from Slack	String
scoold.slack.notify_on_new_answer Pro Enable/disable the ability for Scoold to send notifications to Slack for new answers.	true	Boolean
scoold.slack.notify_on_new_question Pro Enable/disable the ability for Scoold to send notifications to Slack for new questions.	true	Boolean
scoold.slack.notify_on_new_comment Pro Enable/disable the ability for Scoold to send notifications to Slack for new comments.	true	Boolean
scoold.slack.dm_on_new_comment Pro Enable/disable the ability for Scoold to send direct messages to Slack users for new comments.	false	Boolean
scoold.slack.default_question_tags Pro Default question tags for questions created on Slack (comma-separated list).	via-slack	String

Microsoft Teams Integration

Property key & Description	Default Value	Type
scoold.teams.auth_enabled Enable/disable authentication with Microsoft.	false	Boolean
scoold.teams.bot_id Pro Teams bot ID.		String
scoold.teams.bot_secret Pro Teams bot secret key.		String
scoold.teams.bot_service_url Pro Teams bot service URL.	https://smba.trafficmanager.net/emea/	String
scoold.teams.notify_on_new_answer Pro Enable/disable the ability for Scoold to send notifications to Teams for new answers.	true	Boolean
scoold.teams.notify_on_new_question Pro Enable/disable the ability for Scoold to send notifications to Teams for new questions.	true	Boolean
scoold.teams.notify_on_new_comment Pro Enable/disable the ability for Scoold to send notifications to Teams for new comments.	true	Boolean
scoold.teams.dm_on_new_comment Pro Enable/disable the ability for Scoold to send direct messages to Teams users for new comments.	false	Boolean
scoold.teams.post_to_space Pro Default space on Scoold where questions created on Teams will be published. Set it to workspace for using the team's name.		String
scoold.teams.map_channels_to_spaces Pro Enable/disable mapping of Teams channels to Scoold spaces. When enabled, will create a Scoold space for each Teams channel.	false	Boolean
scoold.teams.map_workspaces_to_spaces Pro Enable/disable mapping of Teams teams to Scoold spaces. When enabled, will create a Scoold space for each Teams team.	true	Boolean
scoold.teams.private_teams_listing_allowed Pro Enable/disable the listing of private teams on the Administration page when configuring notification webhooks for Scoold spaces.	true	Boolean
scoold.teams.max_notification_webhooks Pro The maximum number of incoming webhooks which can be created on Scoold. Each webhook links a Teams channel to Scoold.	10	Integer
scoold.teams.default_title Pro Default question title for questions created on Teams.	A question from Microsoft Teams	String
scoold.teams.default_question_tags Pro Default question tags for questions created on Teams (comma-separated list).	via-teams	String

SCIM

Property key & Description	Default Value	Type
scoold.scim_enabled Pro preview Enable/disable support for SCIM user provisioning.	false	Boolean
scoold.scim_secret_token Pro preview SCIM secret token.		String
scoold.scim_allow_provisioned_users_only Pro preview Enable/disable the restriction that only SCIM-provisioned users can sign in.	false	Boolean
scoold.scim_map_groups_to_spaces Pro preview Enable/disable mapping of SCIM groups to Scoold spaces.	true	Boolean
scoold.security.scim.admins_group_equivalent_to Pro preview SCIM group whose members will be promoted to administrators on Scoold.	admins	String
scoold.security.scim.mods_group_equivalent_to Pro preview SCIM group whose members will be promoted to moderators on Scoold.	mods	String

Miscellaneous

Property key & Description	Default Value	Type
scoold.security.redirect_uri Publicly accessible, internet-facing URL of the Para endpoint where authenticated users will be redirected to, from the identity provider. Used when Para is hosted behind a proxy.	http://localhost:8080	String
scoold.security.hosturl_aliases Provides a comma-separated list of alternative host_url public addresses to be used when returning from an authentication request to Para backend. This will override the hostname defined in signin_success and signin_failure and allow Scoold to run on multiple different public URLs while each separate server shares the same configuration. Each must be a valid URL		String
scoold.redirect_signin_to_idp Enable/disable the redirection of users from the signin page, directly to the IDP login page.	false	Boolean
scoold.gmaps_api_key The Google Maps API key. Used for geolocation functionality, (e.g. 'posts near me', location).		String
scoold.imgur_client_id preview Imgur API client id. Used for uploading avatars to Imgur. Note: Imgur have some breaking restrictions going on in their API and this might not work.		String
scoold.cloudinary_url preview Cloudinary URL. Used for uploading avatars to Cloudinary.		String
scoold.max_fav_tags Maximum number of favorite tags.	50	Integer
scoold.batch_request_size Maximum batch size for the Para client pagination requests.	0	Integer
scoold.signout_url The URL which users will be redirected to after they click 'Sign out'. Can be a page hosted externally.	/signin?code=5&success=true	String
scoold.vote_expires_after_sec Vote expiration timeout, in seconds. Users can vote again on the same content after this period has elapsed. Default is 30 days.	2592000	Integer
scoold.vote_locked_after_sec Vote locking period, in seconds. Vote cannot be changed after this period has elapsed. Default is 30 sec.	30	Integer
scoold.downvotes_enabled Enable/disable negative votes.	true	Boolean
scoold.import_batch_size Maximum number objects to read and send to Para when importing data from a backup.	100	Integer
scoold.connection_retries_max Maximum number of connection retries to Para.	10	Integer
scoold.connection_retry_interval_sec Para connection retry interval, in seconds.	10	Integer
scoold.rewrite_inbound_links_with_fqdn If set, links to Scoold in emails will be replaced with a public-facing FQDN.		String
scoold.cluster_nodes Total number of nodes present in the cluster when Scoold is deployed behind a reverse proxy.	1	Integer
scoold.autoinit.root_app_secret_key If configured, Scoold will try to automatically initialize itself with Para and create its own Para app, called app:scoold. The keys for that new app will be saved in the configuration file.		String
scoold.autoinit.para_config_file Does the same as scoold.autoinit.root_app_secret_key but tries to read the secret key for the root Para app from the Para configuration file, wherever that may be.		String
scoold.sitemap_enabled Enable/disable the generation of /sitemap.xml.	true	Boolean
scoold.access_log_enabled Enable/disable the Scoold access log.	false	Boolean
scoold.user_autocomplete_details_enabled pro Enable/disable extra details when displaying user results in autocomplete.	false	Boolean
scoold.user_autocomplete_max_results pro Controls the maximum number of search results in users' autocomplete.	10	Integer
scoold.users_discoverability_enabled Enable/disable discoverability of users on the site. If disabled, user profiles and the users page will be hidden for all except admins.	true	Boolean
scoold.notifications_as_reports_enabled Enable/disable copies of new content notifications in the form of reports on the site. Instead of checking their email, mods will be able to view and act on those on the reports page.	false	Boolean
scoold.akismet_api_key API Key for Akismet for activating anti-spam protection of all posts.		String
scoold.automatic_spam_protection_enabled Enable/disable autonomous action taken against spam posts - if detected a spam post will be blocked without notice. By default, spam posts will require action and approval by admins.	true	Boolean

On startup, Scoold tries to connect to Para every 10 seconds, 10 times in total. (default). If the connection is unsuccessful, the settings will not be persisted.

scoold.connection_retries_max = 10
scoold.connection_retry_interval_sec = 10

For an infinite number of attempts to connect to Para, set connection_retries_max to -1.

Docker

For tagged Docker images for Scoold, go to erudikaltd/scoold on Docker Hub.

The :latest_stable tag always points to the latest stable release version. The :latest tag can be broken/unstable.

The easiest way to create the Scoold stack is to run docker compose up.

1. Create a new directory and copy docker-compose.yml (for Scoold Pro docker-compose.yml is here) to it from this repository.
2. Create the two blank configuration files in the same directory. Both files must be blank in order for the initial auto-configuration to work.:

   $ touch para-application.conf scoold-application.conf
   

   Since the configuration files do not define scoold.app_secret_key and scoold.para_secret_key, these secrets will be populated automatically upon initialization.
3. $ docker compose up

Finally, open locahost:8000/signin/register and create a new account. If you've configured your email with scoold.admins = "my@email" and you sign up with the same email, you will become admin automatically.

To stop the containers use Ctrl + C.

Important: Scoold will connect to Para on http://para:8080, inside the Docker container environment. That hostname may not be accessible from your local machine or the Internet, which will break authentication redirects. For example, when signing in with Google, you will be redirected to Google and then back to Para, on the address specified in scoold.security.redirect_uri. Para must be a publicly accessible on that address or the authentication requests will fail.

If you prefer, you can run the Scoold container outside of Docker Compose. First, have your Scoold scoold-application.conf configuration file ready in the current directory and run this command:

$ docker run -ti -p 8000:8000 --rm -v $(pwd)/scoold-application.conf:/scoold/application.conf \
  -e JAVA_OPTS="-Dconfig.file=/scoold/application.conf" erudikaltd/scoold:latest_stable

For Scoold Pro the images are located in a private registry. You can get access to it once you purchase a Pro license. The run command for Scoold Pro is similar with the only difference being the uploads volume:

$ docker run -ti -p 8000:8000 --rm -v $(pwd)/scoold-application.conf:/scoold-pro/application.conf \
  -v scoold-uploads:/scoold-pro/uploads -e JAVA_OPTS="-Dconfig.file=/scoold-pro/application.conf" \
  374874639893.dkr.ecr.eu-west-1.amazonaws.com/scoold-pro:latest_stable

Follow the getting started guide after starting the Para and Scoold containers.

Environment variables

JAVA_OPTS - Java system properties, e.g. -Dscoold.port=8000 BOOT_SLEEP - Startup delay, in seconds

Kubernetes

There's a Helm chart inside the helm/ folder. First edit helm/scoold/values.yaml and then you can deploy Scoold to Kubernetes with a single command:

cd helm; helm install ./scoold

For more info, read the README at helm/README.md.

Docker registry for Scoold Pro images

If you purchase Scoold Pro you can get access to the private Docker registry hosted on the AWS Elastic Container Registry. Access to the private registry is not given automatically upon purchase - you have to request it. You will then be issued a special access key and secret for AWS ECR. Then execute the following BASH commands (these require AWS CLI v2.x):

1. Configure AWS CLI to use the new credentials or instruct AWS CLI to use an existing credentials profile, e.g. export AWS_PROFILE=docker:

   aws configure
   

2. Authenticate with our ECR registry - a temporary access token will be issued for 12h:

   aws ecr get-login-password --region eu-west-1 | \
   	docker login --username AWS --password-stdin 374874639893.dkr.ecr.eu-west-1.amazonaws.com
   

If the command above doesn't succeed, you won't be able to pull the latest Scoold Pro image or run docker compose.

3. Pull a Scoold Pro image with a specific tag:

   aws ecr list-images --repository-name scoold-pro
   docker pull 374874639893.dkr.ecr.eu-west-1.amazonaws.com/scoold-pro:{tag}
   

You can also run docker compose up instead - download docker-compose.yml for Scoold Pro here

The :latest tag is not supported but you can use :latest_stable. The command aws get-login-password gives you an access token to the private Docker registry which is valid for 12 hours.

For connecting Kubernetes to AWS ECR, please refer to this article.

In case you don't want to use AWS CLI for logging into the Scoold Pro registry, install the AWS ECR Docker Credentials Helper.

Git repository for the Scoold Pro source

For license holders with access to the Scoold Pro source code, the steps to browse the Git repository are as follows:

git remote add scoold https://git-codecommit.eu-west-1.amazonaws.com/v1/repos/scoold-pro
git fetch scoold master

Then enter your username and password for the Git repository.

You should be able to browse the source code with any of the Git graphic interface tools out there. Keep in mind that the repository is read-only, so you can only work with local branches and merge the latest changes from the main branch to your local branch.

Deploying Scoold to Heroku

One-click deployment

Manual deployment - option 1 (code push)

1. Clone this repository and create a new Heroku app
2. Add Heroku as a Git remote target and push your changes with git push heroku master
3. Go to the Heroku admin panel, under "Settings", "Reveal Config Vars" and set all the configuration variables shown above but replace all dots in the variable names with underscores, e.g. scoold.para_endpoint -> scoold_para_endpoint.
4. Open the app in your browser at https://{appname}.herokuapp.com.

Manual deployment - option 2 (JAR push)

1. Build the Scoold JAR file or acquire the Scoold Pro JAR package by buying Pro
2. Download and install the Heroku CLI
3. Create a Heroku app or use the id of an existing Heroku app where you want Scoold deployed
4. Add the heroku/jvm and heroku/java buildpacks to your Heroku app from the Settings page
5. Create a file Procfile containing this line:

   web: java -Dserver.port=$PORT $JAVA_OPTS -jar scoold-*.jar $JAR_OPTS
   

6. Open a terminal in the directory containing the JAR file and execute:

   $ heroku plugins:install java
   $ heroku deploy:jar scoold-x.y.z.jar --app myscooldapp
   

Pushing JARs to Heroku is useful in cases where you have an existing Heroku app which hosts a free version of Scoold, deployed through the "one-click" Heroku button, and you want to upgrade it to Scoold Pro.

Configuring Scoold on Heroku

On Heroku you don't have a configuration file, instead you use Heroku's environment variables to configure Scoold. You can add each Scoold configuration property as an environment variable on the Settings page of your Heroku admin page. Click "Reveal Config Vars". Configuration variables (config vars) must not contain dots ".", for example scoold.para_endpoint becomes para_endpoint. You must replace every dot with an underscore in order to convert a Scoold configuration property to a Heroku environment variable.

Installing the Heroku CLI tool allows you to watch the Scoold logs with:

$ heroku logs --tail --app myscooldapp

Or you can restart your dyno with:

$ heroku restart --app myscooldapp

Deploying Scoold to DigitalOcean

1. Create a droplet running Ubuntu and SSH into it
2. Create a user ubuntu with adduser ubuntu
3. Execute (as root) wget https://raw.githubusercontent.com/Erudika/scoold/master/installer.sh && bash installer.sh
4. Copy the configuration file to your droplet: scp scoold-application.conf [email protected]:/home/ubuntu
5. Restart Scoold with ssh [email protected] "systemctl restart scoold.service"
6. Go to http://123.234.12.34:8000 and verify that Scoold is running (use the correct IP address of your droplet)
7. Configure SSL on DigitalOcean or install nginx + letsencrypt on your droplet (see instructions below)

Deploying Scoold to AWS

Lightsail

1. Click the button above
2. Choose "Linux", "OS only", "Ubuntu 18.04 LTS" (or later version)
3. Click "+ Add launch script" and copy/paste the contents of installer.sh
4. Download the default SSH key pair or upload your own
5. Choose the 512MB instance or larger (1GB recommended)
6. Wait for the instance to start and open the IP address in your browser at port 8000

Elatic Beanstalk

1. Clone this repo and change directory to it
2. Generate a WAR package with mvn -Pwar package
3. Create a new Beanstalk web app
4. Upload the WAR package target/scoold-x.y.z.war to Beanstalk, modify any additional options and hit "Create"

Authentication with Amazon Cognito

Scoold is fully compatible with Amazon Cognito because Cognito is just another OAuth 2.0 service provider. Here's how to configure Scoold to work with Amazon Cognito:

1. Create a Cognito user pool (if you don't have one already)
2. Create a Cognito App client with the OAuth 2.0 authorization code grant enabled:
3. Create a Cognito login subdomain for your app client like this: https://scoold.auth.eu-west-1.amazoncognito.com
4. Edit the Scoold configuration file scoold-application.conf and add a new OAuth 2.0 authentication provider:

   scoold.oa2_app_id = "cognito_app_client_id"
   scoold.oa2_secret = "cognito_app_client_secret"
   scoold.security.oauth.authz_url = "https://scoold.auth.eu-west-1.amazoncognito.com/login"
   scoold.security.oauth.token_url = "https://scoold.auth.eu-west-1.amazoncognito.com/oauth2/token"
   scoold.security.oauth.profile_url = "https://scoold.auth.eu-west-1.amazoncognito.com/oauth2/userInfo"
   scoold.security.oauth.provider = "Continue with Cognito"

5. Restart Scoold and login with a user from your Cognito user pool

Make sure you whitelist your Para authentication endpoint with Cognito https://para_url/oauth2_auth.

Deploying Scoold to Azure

1. Click the button above
2. Fill in the required parameters
3. Launch the container
4. Go to your container and press "Connect" using /bin/sh
5. In the terminal type in vi scoold-application.conf, hit i and paste in your configuration
6. Hit Esc and type in :wq then restart your container Another option is to attach a secret volume to your container, containing the configuration. It should be mounted as /scoold/application.conf.

Deploying Scoold to Google App Engine

1. Download the Scoold JAR package to a local folder and rename it to scoold.jar
2. Copy the file app.gae.yaml from this repository to the same folder and rename it to app.yaml
3. Create a project in the Google Cloud Platform Console
4. Install the Google Cloud SDK
5. Edit app.gae.yaml and fill in the correct configuration properties
6. Deploy it with gcloud preview app deploy app.yaml

Deploying Scoold to a servlet container

The instructions for Tomcat in particular are:

1. Generate a WAR package with mvn -Pwar package
2. Rename the WAR package to ROOT.war if you want it deployed to the root context or leave it as is
3. Put the WAR package in Tomcat/webapps/ & start Tomcat
4. Copy config file cp scoold-application.conf Tomcat/webapps/scoold-folder/WEB-INF/classes/application.conf & restart Tomcat

Scoold is compatible with Tomcat 9+.

Deploying Scoold under a specific context path

To deploy Scoold at a different path instead of the root path, set scoold.context_path = "/newpath. The default value for this setting is blank, meaning Scoold will be deployed at the root directory.

Migrating from one Para deployment to another

There are situations where you want to transfer your data from one Para server to another. This may be because you decided to switch databases or hosting providers. This process is made simple with the backup and restore feature in Scoold and Scoold Pro. Simply go to the Administration page and download all your data from the source installation. Then on the target installation go to the Administration page and import the ZIP file which contains the backup.

Important: All data will be overwritten on restore, so it's highly recommended that the target Scoold installation is fresh and contains no data.

When using the default H2 database, you can also copy the ./data directory to the new installation or just copy all *.db files. The data directory also contains Lucene index folders for each app, e.g. ./data/scoold-lucene. These folders can also be moved and copied or even deleted. You can easily restore the Lucene index for a Para app by running a rebuild index task from the para-cli tool. Here's how to rebuild the root app para and a child app scoold with just two simple commands:

$ npm i -g para-cli
$ para-cli rebuild-index --endpoint "http://localhost:8080" --accessKey "app:para" --secretKey "secret1"
$ para-cli rebuild-index --endpoint "http://localhost:8080" --accessKey "app:scoold" --secretKey "secret2"

Migrating from Stack Overflow for Teams to Scoold

1. Start Scoold and login as admin
2. Download your data archive from Stack Overflow by browsing to 'Admin settings -> Account info -> Download data'
3. On Scoold's Administration page click 'Import' and select the Stack Overflow archive (.zip)
4. Check "This archive was exported from Stack Overflow" and click import

All the data for your team on Stack Overflow, except for user badges, will be imported into Scoold.

Upgrading from Scoold to Scoold Pro

You can seamlessly upgrade from Scoold to Scoold Pro without changing the configuration or anything else in your infrastructure. The process is very simple:

1. Get your Scoold Pro package (JAR or WAR)
2. Stop (undeploy) Scoold and replace its package with the Scoold Pro package
3. Start Scoold Pro (or redeploy your Scoold Pro WAR file)

Content-Security-Policy header

This header is enabled by default for enhanced security. It can be disabled with scoold.csp_header_enabled = false. The default value is modified through scoold.csp_header = "new_value". The default CSP header is:

default-src 'self';
base-uri 'self';
connect-src 'self' scoold.com www.google-analytics.com www.googletagmanager.com accounts.google.com;
frame-src 'self' accounts.google.com staticxx.facebook.com;
font-src cdnjs.cloudflare.com fonts.gstatic.com fonts.googleapis.com;
style-src 'self' 'unsafe-inline' fonts.googleapis.com cdnjs.cloudflare.com static.scoold.com accounts.google.com;
img-src 'self' https: data:;
object-src 'none;
report-uri /reports/cspv;
script-src 'unsafe-inline' https: 'nonce-{{nonce}}' 'strict-dynamic';

The placeholder {{nonce}} will get replaced by the CSP nonce value used for whitelisting scripts.

Note: If you get CSP violation errors, check your scoold.host_url and scoold.cdn_url configuration, or edit the value of scoold.csp_header.

Additionally, there are 4 options to extend the values of connect-src, frame-src, font-src and style-src respectively:

scoold.csp_connect_sources = "connect-domain1.com connect-domain2.com"
scoold.csp_frame_sources = "frame-domain1.com frame-domain2.com"
scoold.csp_font_sources = "font-domain1.com font-domain2.com"
scoold.csp_style_sources = "style-domain1.com style-domain2.com"

You can also enable or disable CSP violation reports (visible only to admins) by setting scoold.csp_reports_enabled = true. Keep in mind that if your website has a lot of traffic, this will result in hundreds of new reports being created each hour.

External scripts and JS snippets

You can append external scripts and JS snippets to the end of the page by setting the scoold.external_scripts property. Scripts are loaded in alphabetical order based on their key.

# URL
scoold.external_scripts.myscript1 = "https://mydomain.com/script.js"
# Base64 encoded long JavaScript snippet
scoold.external_scripts.myscript2 = "J2Y2M3VlcH .... enZ2OScpOw=="
# Short raw JS snippet
scoold.external_scripts.myscript3 = "var x = 5; console.log('x is', x);"

Important: Watch out for console errors in the browser after you add external scripts. In such cases you might have to modify the frame-src or connect-src portions of the CSP header (see the 4 options above).

If 3rd party cookie consent is enabled (for GDPR, CCPA), all external scripts will be disabled until the user gives their consent. You can bypass that by prefixing its key with "bypassconsent", e.g. scoold.external_scripts.bypassconsent_myscript2.

Additionally, you can put scripts in the <head> element by prefixing their name with "head", for example: scoold.external_scripts.head_script.

External CSS stylesheets

You can inline short snippets of CSS using scoold.inline_css. Keep in mind that any inlined CSS rules will override any of the previously declared stylesheets, including the main stylesheet rules.

scoold.inline_css = "body { color: #abcdef; }"

Another option is to add external stylesheets to the website:

scoold.external_styles = "https://mydomain.com/style1.css, https://mydomain.com/style2.css"

The last option is to completely replace the main stylesheet with a custom one. It's a good idea to copy the default CSS rules from /styles/style.css and modify those, then upload the new custom stylesheet file to a public location and set:

scoold.stylesheet_url = "https://public.cdn.com/custom.css"

The order in which CSS rules are loaded is this (each overrides the previous ones):

1. main stylesheet, 2. external stylesheets, 3. inline CSS or custom theme

You can also override the default dark stylesheet which is only loaded if dark mode is enabled:

scoold.dark_stylesheet_url = "https://public.cdn.com/dark.css"

Serving static files from local disk

By default, Scoold will only serve static files from the /static folder on the classpath (inside the JAR). If you want to configure it to serve additional resources from a local directory, set this system property:

spring.web.resources.static-locations = "classpath:/static/, file:/home/scoold/static-folder/"

Then, for example, a file located at /home/scoold/static-folder/file.png will be served from localhost:8000/file.png. For more information, check the Spring Boot documentation.

Serving static files from a CDN

Scoold will serve static files (JS, CSS, fonts) from the same domain where it is deployed. You can configure the scoold.cdn_url to enable serving those files from a CDN. The value of the CDN URL must not end in "/".

SMTP configuration

Scoold uses the JavaMail API to send emails. If you want Scoold to send notification emails you should add the following SMTP settings to your config file:

# system email address
scoold.support_email = "[email protected]"

scoold.mail.host = "smtp.example.com"
scoold.mail.port = 587
scoold.mail.username = "[email protected]"
scoold.mail.password = "password"
scoold.mail.tls = true
scoold.mail.ssl = false

# enable SMTP debug logging
scoold.mail.debug = true

The email template is located in src/main/resources/emails/notify.html.

Email notifications are enabled by default but can also be turned off completely by changing these settings:

# disable all notifications
scoold.notification_emails_allowed = true
# disable notifications for new posts
scoold.newpost_emails_allowed = true
# disable notifications for new posts that match favorite tags
scoold.favtags_emails_allowed = true
# disable notifications for replies
scoold.reply_emails_allowed = true
# disable notifications for comments
scoold.comment_emails_allowed = true

# additional options for Scoold Pro
# disable notifications for mentions
scoold.mentions_emails_allowed = true

For Gmail you have to turn on "Less secure app access" in your Google account settings. There's no need to configure mail.tls or mail.ssl, just set the mail.host to smtp.gmail.com and your Gmail email and password.

Email verification

You can enable or disable the email verification step by setting scoold.security.allow_unverified_emails = true (in Scoold's scoold-application.conf). By default, email verification is turned off when Scoold is running in development mode. This will allow new users to register with fake emails and Scoold will not send them a confirmation email. It's useful for testing purposes or in certain situations where you want to programmatically sign up users who don't have an email.

reCAPTCHA support

You can protect signups and password reset functionality with reCAPTCHA v3. First, you will need to register a new domain at Google reCAPTCHA. Create a new reCAPTCHA v3, add your site to the whitelist and copy the two keys - a clientside key (site key) and a serverside key (secret). Then, protect the pages /signin/register and /signin/iforgot by adding these properties to your configuration:

scoold.signup_captcha_site_key = "site-key-from-google"
scoold.signup_captcha_secret_key = "secret-from-google"

Delete protection for valuable content

By default, Scoold will protect valuable questions and answers from accidental deletion. If a question has at least one answer, the author of that question will not be able to delete it. Or, if an answer is accepted by the author of the question, the person who wrote the answer won't be able to delete it. You can turn this off with:

scoold.delete_protection_enabled = false

Welcome email customization

To customize the message sent when a new user signs up with Scoold, modify these properties in your Scoold configuration file:

scoold.emails.welcome_text1 = "You are now part of {0} - a friendly Q&A community..."
scoold.emails.welcome_text2 = "To get started, simply navigate to the "Ask question" page and ask a question..."
scoold.emails.welcome_text3 = "Best, <br>The {0} team<br><br>"

Social login

For all social identity providers, you need to obtain both the OAuth2 client ID (app id) and secret key. Note: if the credentials are blank, the sign in button is hidden for that provider.

# Facebook
scoold.fb_app_id = ""
scoold.fb_secret = ""
# Google
scoold.gp_app_id = ""
scoold.gp_secret = ""
# GitHub
scoold.gh_app_id = ""
scoold.gh_secret = ""
# LinkedIn
scoold.in_app_id = ""
scoold.in_secret = ""
# Twitter
scoold.tw_app_id = ""
scoold.tw_secret = ""
# Microsoft
scoold.ms_app_id = ""
scoold.ms_secret = ""
scoold.ms_tenant_id = ""
# Slack
scoold.sl_app_id = ""
scoold.sl_secret = ""
# Amazon
scoold.az_app_id = ""
scoold.az_secret = ""

You also need to set your host URL when running Scoold in production:

scoold.host_url = "https://your.scoold.url"

This is required for authentication requests to be redirected back to the origin.

Important: You must whitelist the Para endpoints in the admin consoles of each authentication provider. For example, for GitHub you need to whitelist https://parahost.com/github_auth as a callback URL (redirect URL). The same thing applies for the other providers. For these two providers you need to whitelist these two URLs, containing the public address of Scoold:

https://myscoold.com
https://myscoold.com/signin

For locally hosted authentication providers (SAML, LDAP, Mattermost, etc.) the authentication endpoints will also be pointing to the URL of your Scoold server.

If you skip this step, authentication will most likely not work.

In some cases (see related issue) you want to have Scoold connect to Para which is hosted somewhere on your local network and logging in with some authentication providers, like Microsoft, doesn't work. In such cases, you would see an error "redirect_uri mismatch" or "invalid redirect_uri - must start with https:// or http://localhost". To make it work you can set scoold.security.redirect_uri = "https://public-para.host" while still keeping scoold.para_endpoint = "http://local-ip:8080".

OAuth 2.0 login

You can authenticate users against any OAuth 2.0/OpenID Connect server through the generic OAuth 2 filter in Para. Make sure you whitelist your Para authentication endpoint https://para_url/oauth2_auth as a trusted redirect URL.

Here are all the options which you can set in the Scoold configuration file:

# minimal setup
scoold.oa2_app_id = ""
scoold.oa2_secret = ""
scoold.security.oauth.authz_url = "https://your-idp.com/login"
scoold.security.oauth.token_url = "https://your-idp.com/token"
scoold.security.oauth.profile_url = "https://your-idp.com/userinfo"
scoold.security.oauth.scope = "openid email profile"

# extra options
scoold.security.oauth.accept_header = ""
scoold.security.oauth.domain = "paraio.com"
scoold.security.oauth.parameters.id = "sub"
scoold.security.oauth.parameters.picture = "picture"
scoold.security.oauth.parameters.email = "email"
scoold.security.oauth.parameters.name = "name"
scoold.security.oauth.parameters.given_name = "given_name"
scoold.security.oauth.parameters.family_name = "family_name"

# Sets the string on the login button
scoold.security.oauth.provider = "Continue with OpenID Connect"

# [PRO] Enable/disable access token delegation
scoold.security.oauth.token_delegation_enabled = false

# [PRO] Assigns spaces to each user from the OAuth2 claim 'spaces'
scoold.security.oauth.spaces_attribute_name = "spaces"

# [PRO] Assigns moderator/admin roles from the OAuth2 claim 'roles'
scoold.security.oauth.groups_attribute_name = "roles"
scoold.security.oauth.mods_equivalent_claim_value = "mod"
scoold.security.oauth.admins_equivalent_claim_value = "admin"
# if specified, users who are not admin/mod will be denied access when not members of group
scoold.security.oauth.users_equivalent_claim_value = ""

# Enable/disable avatar fetching from IDP
scoold.security.oauth.download_avatars = false

# State parameter in auth requests can be disabled if problematic
scoold.security.oauth.state_param_enabled = true

Access token delegation

PRO This is an additional security feature, where the access token from the identity provider (IDP) is stored in the user's idpAccessToken field and validated on each authentication request with the IDP. If the IDP revokes a delegated access token, then that user would automatically be logged out from Scoold Pro and denied access immediately.

Advanced attribute mapping

The basic profile data attributes (name, email, etc.) can be extracted from a complex response payload that is returned from the identity provider's userinfo endpoint. You can use JSON pointer syntax to locate attribute values within a more complex JSON payload like this one:

{
    "sub": "gfreeman",
    "attributes": {
        "DisplayName": "Gordon Freeman",
        "DN": "uid=gordon,CN=Users,O=BlackMesa",
        "Email": "[email protected]"
    }
}

The corresponding configuration to extract the name and email address would be:

scoold.security.oauth.parameters.email = "/attributes/Email"
scoold.security.oauth.parameters.name = "/attributes/DisplayName"

Advanced roles mapping

PRO This feature requires token delegation to be enabled with scoold.security.oauth.token_delegation_enabled = true. When working with complex user profile payloads coming from the ID provider, you can specify the exact property name where the roles data is contained. For example, having a JSON user profile response like this:

{
    "sub": "gfreeman",
    "DisplayName": "Gordon Freeman",
    "Roles": "Staff,Admins,TopSecret",
    "attributes": {
        "MemberOf": [
            "CN=Admins,CN=Lab,O=BlackMesa"
        ]
    }
}

we can map that user to the Scoold admins group with this configuration:

scoold.security.oauth.groups_attribute_name = "Roles"
scoold.security.oauth.admins_equivalent_claim_value = ".*?Admins.*"

Regular expressions are supported for searching within the roles attribute value. JSON pointers can also be used here like so:

scoold.security.oauth.groups_attribute_name = "/attributes/MemberOf"
scoold.security.oauth.admins_equivalent_claim_value = "^CN=Admins.*"

Additionally, when assigning roles from OAuth2 claims, you can explicitly specify a subset of allowed users who can access Scoold by setting scoold.security.oauth.users_equivalent_claim_value. For example, if the value of that is set to "scoold_user", and a user having the claim of "roles": ["sales_rep"] tries to login, they will be denied access. By default, all OAuth2 users are allowed to log into Scoold.

Additional custom OAuth 2.0 providers

You can add two additional custom OAuth 2.0/OpenID connect providers called "second" and "third". Here's what the settings look like for the "second" provider:

# minimal setup (second provider)
scoold.oa2second_app_id = ""
scoold.oa2second_secret = ""
scoold.security.oauthsecond.authz_url = "https://your-idp.com/login"
scoold.security.oauthsecond.token_url = "https://your-idp.com/token"
scoold.security.oauthsecond.profile_url = "https://your-idp.com/userinfo"
scoold.security.oauthsecond.scope = "openid email profile"

# extra options (second provider)
scoold.security.oauthsecond.accept_header = ""
scoold.security.oauthsecond.domain = "paraio.com"
scoold.security.oauthsecond.parameters.id = "sub"
scoold.security.oauthsecond.parameters.picture = "picture"
scoold.security.oauthsecond.parameters.email = "email"
scoold.security.oauthsecond.parameters.name = "name"
scoold.security.oauthsecond.parameters.given_name = "given_name"
scoold.security.oauthsecond.parameters.family_name = "family_name"

# Sets the string on the login button (second provider)
scoold.security.oauthsecond.provider = "Continue with Second OAuth 2.0 provider"

# Enable/disable access token delegation (second provider)
scoold.security.oauthsecond.token_delegation_enabled = false

For the "third" OAuth 2.0 provider it's the same configuration but replace "second" with "third".

Note: If Para and Scoold are hosted both on the same server and your Para instance is not publicly accessible from the Internet, you need to expose localhost:8080/oauth2_auth by configuring a proxy server to forward yourdomain/oauth2_auth requests to localhost:8080/oauth2_auth. If Para is publicly accessible this step is not necessary.

Sign in with Okta

This is an example guide for configuring Scoold to work with an authentication provider like Okta. The steps are similar for other providers, such as Auth0.

1. Create a new client application (OAuth 2 client)
   • Add http://para-host:8080/oauth2_auth as a login redirect URI
   • Use the "Authorization Code" flow
   • Select that you want client credentials
2. Copy the client credentials (client id, secret) to your Scoold scoold-application.conf file:

   scoold.oa2_app_id = "0oa123...."
   scoold.oa2_secret = "secret"
   scoold.security.oauth.authz_url = "https://${yourOktaDomain}/oauth2/v1/authorize"
   scoold.security.oauth.token_url = "https://${yourOktaDomain}/oauth2/v1/token"
   scoold.security.oauth.profile_url = "https://${yourOktaDomain}/oauth2/v1/userinfo"
   scoold.security.oauth.scope = "openid email profile"
   scoold.security.oauth.provider = "Continue with Okta"

Make sure to replace ${yourOktaDomain} with your actual Okta domain name.

3. Restart Scoold and login with an Okta user account

Sign in with Azure Active Directory (AAD)

This is an example guide for configuring Scoold to use Azure Active Directory (aka Microsoft Identity Platform) as its authentication provider. The steps are similar to other OAuth2.0 identity providers setup.

1. Go to Azure Portal

2. Navigate to your Azure Acive Directory tenant

3. Go to App registrations (in the left sidebar, under Manage section)

4. Choose New registration

5. Put the name of the new app, and select supported account types (accoding to your requirements)

6. Provide the Redirect URI - it needs to point to Para's /oauth2_auth endpoint (make sure that this URL is accessible from your users' devices). For development purposes, http://localhost:8080/oauth2_auth is probably sufficient.

7. Click Register.

8. Copy the Application (client) ID that you should be seeing now at the top - it is the value for scoold.oa2_app_id setting in your configuration.

9. Navigate to Certificates and Secrets in the sidebar on the left.

10. Create a new secret by clicking on New client secret.

11. Copy the generated secret (you will not be able to see that secret anymore on Azure Portal) - it is the value for scoold.oa2_secret setting in your configuration.

12. Fill in the configuration of Scoold:

    scoold.oa2_app_id = "e538..."
    scoold.oa2_secret = "secret"
    scoold.security.oauth.authz_url = "https://login.microsoftonline.com/${yourAADTenantId}/oauth2/v2.0/authorize"
    scoold.security.oauth.token_url = "https://login.microsoftonline.com/${yourAADTenantId}/oauth2/v2.0/token"
    scoold.security.oauth.profile_url = "https://graph.microsoft.com/oidc/userinfo"
    scoold.security.oauth.scope = "openid email profile"
    scoold.security.oauth.provider = "Continue with AAD"

Make sure to replace ${yourAADTenantId} with your actual AAD tenant ID.

13. Restart Scoold and login with an AAD user account

LDAP configuration

LDAP authentication is initiated with a request like this POST /signin?provider=ldap&access_token=username:password. There are several configuration options which Para needs in order to connect to your LDAP server. These are the defaults:

# minimal setup
scoold.security.ldap.server_url = "ldap://localhost:8389/"
scoold.security.ldap.base_dn = "dc=springframework,dc=org"
scoold.security.ldap.user_dn_pattern = "uid={0}"
# add this ONLY if you are connecting to Active Directory
scoold.security.ldap.active_directory_domain = ""

# extra options - change only if necessary
scoold.security.ldap.user_search_base = ""
scoold.security.ldap.user_search_filter = "(cn={0})"
scoold.security.ldap.password_attribute = "userPassword"
scoold.security.ldap.username_as_name = false

# Sets the string on the login button (PRO)
scoold.security.ldap.provider = "Continue with LDAP"

# automatic groups mapping
scoold.security.ldap.mods_group_node = ""
scoold.security.ldap.admins_group_node = ""

The search filter syntax allows you to use the placeholder {0} which gets replaced with the person's username.

You can also map LDAP DN nodes to Para user groups. For example, with the following configuration:

scoold.security.ldap.mods_group_node = "ou=Moderators"
scoold.security.ldap.admins_group_node = "cn=Admins"

LDAP users with a DN uid=Gordon,ou=Moderators,dc=domain,dc=org will automatically become part of the mods group, i.e. groups: "mods". Similarly, if their DN contains cn=Admins they will become administrators, i.e. groups: "admins".

Active Directory LDAP

To enable authentication with an Active Directory LDAP server, set scoold.security.ldap.ad_mode_enabled = true. In this mode, the search filter defaults to (&(objectClass=user)(userPrincipalName={0})). An alternative search filter would be (&(objectClass=user)(sAMAccountName={1})). Keep in mind that the domain you put in the configuration is actually the UPN suffix which gets appended to the username as [email protected] if the supplied login username doesn't end with a domain. The domain has nothing to do with the AD domain or the location of the AD server.

The only valid configuration properties for AD are: user_search_filter, base_dn, server_url and active_directory_domain - everything else is ignored so don't put it in the config file at all!

Here's a working LDAP configuration for AD:

scoold.security.ldap.ad_mode_enabled = true
scoold.security.ldap.user_search_filter = "(&(objectClass=user)(sAMAccountName={1}))"
scoold.security.ldap.base_dn = "ou=dev,dc=scoold,dc=com"
scoold.security.ldap.server_url = "ldap://192.168.123.70:389"
scoold.security.ldap.active_directory_domain = "scoold.com"

For the above configuration the following logins should work, given that a user joe exists:

• [email protected] + password
• [email protected] + password
• joe + password

As you can see the domain part is actually ignored because it is irrelevant. You cannot bind an AD user with their email. You can bind them based on their username a.k.a. sAMAccountName. If the user has an email address where the alias is the same as the sAMAccountName but the domain is different, then the login will succeed. If the user above has an email [email protected] then the login with that email will fail because a bind is not possible, and the LDAP search request will return no results.

The syntax for the search filter allows you to use the placeholders {0} (replaced with username@domain) and {1} (replaced with username only).

Here's an example Active Directory configuration (note that any other settings than the ones below will be ignored):

scoold.security.ldap.server_url = "ldap://server:389"
scoold.security.ldap.active_directory_domain = "domain.com"
scoold.security.ldap.user_search_filter = "userPrincipalName={0}"
scoold.security.ldap.base_dn = "ou=dev,dc=domain,dc=com"

FreeIPA LDAP

Scoold supports authentication with a FreeIPA server over LDAP. Here's a sample configuration for the free demo instance provided by FreeIPA - ipa.demo1.freeipa.org:

scoold.security.ldap.server_url = "ldap://ipa.demo1.freeipa.org:389"
scoold.security.ldap.base_dn = "cn=users,cn=accounts,dc=demo1,dc=freeipa,dc=org"
scoold.security.ldap.user_dn_pattern = "uid={0}"

To test this, try logging in with user manager and password Secret123.

Local (internal) LDAP authentication

PRO Scoold Pro can authenticate users with an internal (local) LDAP server, even if your Para backend is hosted outside of your network (like ParaIO.com). This adds an extra layer of security and flexibility and doesn't require a publicly accessible LDAP server. To enable this feature, add this to your configuration:

scoold.security.ldap.is_local = true
# required for passwordless authentication with Para
scoold.app_secret_key = "change_to_long_random_string"

Note that the secret key above is not the same as your Para secret key! You have to generate a random string for that (min. 32 chars).

To print out debug information about LDAP requests, start Para with -Dlogging.level.org.springframework.ldap=DEBUG. If you are connecting to an internal LDAP server, add the same system property to the Scoold command line.

To learn more about the settings above, read the LDAP docs for Para.

SAML configuration

PRO First, you have to setup Para as a SAML service provider using the config below. Then you can exchange SAML metadata with your SAML identity provider (IDP). The SP metadata endpoint is /saml_metadata/{appid}. For example, if your Para endpoint is paraio.com and your appid is scoold, then the metadata is available at https://paraio.com/saml_metadata/scoold.

SAML authentication is initiated by sending users to the Para SAML authentication endpoint /saml_auth/{appid}. For example, if your Para endpoint is paraio.com and your appid is scoold, then the user should be sent to https://paraio.com/saml_auth/scoold. Para (the service provider) will handle the request and redirect to the SAML IDP. Finally, upon successful authentication, the user is redirected back to https://paraio.com/saml_auth/scoold which is also the assertion consumer service (ACS).

Note: The X509 certificate and private key must be encoded as Base64 in the configuration file. Additionally, the private key must be in the PKCS#8 format (---BEGIN PRIVATE KEY---). To convert from PKCS#1 to PKCS#8, use this:

openssl pkcs8 -topk8 -inform pem -nocrypt -in sp.rsa_key -outform pem -out sp.pem

For simplicity, you can generate the certificates for SAML by executing the Bash script gencerts.sh, located in this repository:

./gencerts.sh localhost secret

Then, simply Base64-encode the contents of the public key localhost.pem and private key localhost.key:

base64 localhost.key > localhost_saml_base64.key
base64 localhost.pem > localhost_saml_base64.pem

There are lots of configuration options but Para needs only a few of those in order to successfully authenticate with your SAML IDP (listed in the first rows below).

# minimal setup
# IDP metadata URL, e.g. https://idphost/idp/shibboleth
scoold.security.saml.idp.metadata_url = ""

# SP endpoint, e.g. https://paraio.com/saml_auth/scoold
scoold.security.saml.sp.entityid = ""

# SP public key as Base64(x509 certificate)
scoold.security.saml.sp.x509cert = ""

# SP private key as Base64(PKCS#8 key)
scoold.security.saml.sp.privatekey = ""

# attribute mappings (usually required)
# e.g. urn:oid:0.9.2342.19200300.100.1.1
scoold.security.saml.attributes.id = ""
# e.g. urn:oid:0.9.2342.19200300.100.1.3
scoold.security.saml.attributes.email = ""
# e.g. urn:oid:2.5.4.3
scoold.security.saml.attributes.name = ""


# extra options (optional)
# this is usually the same as the "EntityId"
scoold.security.saml.sp.assertion_consumer_service.url = ""
scoold.security.saml.sp.nameidformat = ""

# IDP metadata is usually automatically fetched
scoold.security.saml.idp.entityid = ""
scoold.security.saml.idp.single_sign_on_service.url = ""
scoold.security.saml.idp.x509cert = ""

scoold.security.saml.security.authnrequest_signed = false
scoold.security.saml.security.want_messages_signed = false
scoold.security.saml.security.want_assertions_signed = false
scoold.security.saml.security.want_assertions_encrypted = false
scoold.security.saml.security.want_nameid_encrypted = false
scoold.security.saml.security.sign_metadata = false
scoold.security.saml.security.want_xml_validation = true
scoold.security.saml.security.signature_algorithm = ""

scoold.security.saml.attributes.firstname = ""
scoold.security.saml.attributes.picture = ""
scoold.security.saml.attributes.lastname = ""
scoold.security.saml.domain = "paraio.com"

# Sets the string on the login button
scoold.security.saml.provider = "Continue with SAML"

Scoold Pro can authenticate users with an internal (local) SAML provider, even if your Para backend is hosted outside of your network (like ParaIO.com). This adds an extra layer of security and flexibility and doesn't require your SAML endpoints to be publicly accessible. To enable this feature, add this to your configuration:

scoold.security.saml.is_local = true
# required for passwordless authentication with Para
scoold.app_secret_key = "change_to_long_random_string"

Note that the secret key above is not the same as your Para secret key! You have to generate a random string for that (min. 32 chars).

Custom authentication (Single Sign-on)

PRO Para supports custom authentication providers through its "passwordless" filter. This means that you can send any user info to Para and it will authenticate that user automatically without passwords. The only verification done here is on this secret key value which you provide in your Scoold Pro configuration file:

scoold.app_secret_key = "change_to_long_random_string"

This key is used to protect requests to the passwordless filter and it's different from the Para secret key for your app. Here's the basic authentication flow:

1. A user wants to sign in to Scoold Pro and clicks a button
2. The button redirects the user to a remote login page you or your company set up.
3. The user enters their credentials and logs in.
4. If the credentials are valid, you send back a special JSON Web Token (JWT) to Scoold with the user's basic information.
5. Scoold verifies the token and the user is signed in to Scoold

The JWT must contain the following claims:

• email - user's email address
• name - user's display name
• identifier - a unique user id in the format custom:123
• appid - the app id (optional)

The JWT is signed with the value of scoold.app_secret_key and should have a short validity period (e.g. 10 min). The JWT should also contain the claims iat and exp and, optionally, nbf. Supported signature algorithms for the JWT are HS256, HS384 or HS512. Once you generate the JWT on your backend (step 4 above), redirect the successful login request back to Scoold:

GET https://scoold-host/signin/success?jwt=eyJhbGciOiJIUzI1NiI..&passwordless=true

The UI button initiating the authentication flow above can be customized like this:

scoold.security.custom.provider = "Continue with Acme Co."
# location of your company's login page
scoold.security.custom.login_url = ""

There's an example login page implementing this sort of authentication.

Login and logout redirects

You can configure Scoold to redirect users straight to the identity provider when they click the "Sign in" button. This feature is disabled by default:

scoold.redirect_signin_to_idp = false

This works only for social login identity providers and SAML. It won't work for LDAP or basic password authentication. When enabled and combined with scoold.is_default_space_public = false, unauthenticated users will be sent directly to the IDP without seeing the "Sign in" page or any other page on Scoold.

You can also configure users to be redirected to an external location when they log out:

scoold.signout_url = "https://homepage.com"

SCIM 2.0 support

PRO Scoold Pro has a dedicated SCIM API endpoint for automatic user provisioning at http://localhost:8000/scim. This allows you to manage Scoold Pro users externally, on an identity management platform of your choice. Here's an example configuration for enabling SCIM in Scoold:

scoold.scim_enabled = true
scoold.scim_secret_token = "secret"
scoold.scim_map_groups_to_spaces = true
scoold.scim_allow_provisioned_users_only = false

By default, Scoold Pro will create a space for each SCIM Group it receives from your identity platform and assign the members of that group to the corresponding space. Just make sure that groups are pushed from your IdM platform to Scoold.

If scoold.scim_allow_provisioned_users_only = true, user accounts which have not been SCIM-provisioned will be blocked even if those users are members of your identity pool. This allows system administrators to provision a subset of the user pool in Scoold.

Important: When users are provisioned from a SCIM client (Azure AD, Okta, OneLogin, etc.) ensure that the SCIM userName attribute is unique. This means that when a SCIM client sends an update to Scoold Pro, the user will be matched based on their userName.

You can also map groups from your identity pool to Para user groups. For example:

scoold.security.scim.mods_group_equivalent_to = "Moderators"
scoold.security.scim.admins_group_equivalent_to = "Administrators"

Spaces (a.k.a. Teams)

Spaces are a way to organize users and questions into isolated groups. There's a default space, which is publicly accessible by default. Each user can belong to one or more spaces, but a question can only belong to a single space. Permission to access a space is given by an administrator. You can bulk edit users' spaces and also move a question to a different space.

By default there's a public "default" space where all questions go. When you create a new space and assign users to it they will still see all the other questions when they switch to the "default" space. To make the default space private set scoold.is_default_space_public = false.

PRO In Scoold Pro, you can create as many space as you need. The open source version is limited to 10 spaces. Also in PRO you can automatically assign multiple spaces to new users, whereas in the OSS version you can only assign one.

If you want to assign space(s) to new users automatically, add this to your configuration:

# put space ids here, the "scooldspace:" prefix is optional
scoold.auto_assign_spaces = "my-space-one,my-other-space"

You can assign both the default space and a custom space to new users (values can contain spaces):

scoold.auto_assign_spaces = "default,My Custom Space"

When using the option above, new spaces are added to existing spaces for each user. You can configure auto-assigned spaces to overwrite the existing user spaces (like the "default" space, assigned to everyone) by setting:

scoold.reset_spaces_on_new_assignment = true

So when you have that set to false and you have configured Scoold to assign custom spaces to new users (e.g. "my-space-1" and "my-space-2"), those users will become members of "my-space-1", "my-space-2" and the default space. If the value is true, the default space gets overwritten by the custom spaces you have specified in scoold.auto_assign_spaces and new users will only be members of "my-space-1" and "my-space-2".

This is turned on for all users authenticated with LDAP, SAML or OAuth 2.0.

Alternatively, Scoold Pro can have spaces and roles delegated to users from an OpenID Connect/OAuth 2.0 identity provider. You have to enable access token delegation with scoold.security.oauth.token_delegation_enabled = true and Scoold Pro will try to obtain spaces from a custom attribute like spaces. Such custom attributes can be configured in the IDP and pushed to clients (Scoold Pro) embedded in access tokens. If you want to change the name of the custom attribute supplied by your IDP, set scoold.security.oauth.spaces_attribute_name, which by default is equal to spaces. The value of that attribute should contain comma-separated list of spaces. If the spaces pushed from the IDP do not exist, Scoold will create them for you.

There are two ways to assign moderators to spaces - a user can be promoted to moderator and be allowed to access all spaces, or, every space can have an individually assigned moderator. The option that controls this operation is:

# when false, mods are manually assigned per each space
scoold.mods_access_all_spaces = true

When the above is set to false, administrators can go to the profile page of a user and make them a moderator in the spaces they choose. For all other spaces, the user in question will be a regular user. Only administrators can promote users to moderators, no matter how the option above is configured.

Webhooks

Webhooks are enabled by default in Scoold. To disable this functionality set scoold.webhooks_enabled = false. If you are self-hosting Para, you need to also enable webhooks there using the same configuration option. You can add or remove webhooks in the "Administration" page. Webhooks can also be disabled and they will be disabled automatically when the target URL doesn't respond to requests from Para.

Para will notify your target URL with a POST request containing the payload and a X-Webhook-Signature header. This header should be verified by the receiving party by computing Base64(HmacSHA256(payload, secret)).

The standard events emitted by Scoold are:

• question.create - whenever a new question is created
• question.close - whenever a question is closed
• question.view - whenever a question is viewed by anyone
• question.approve - whenever a question is approved by moderator
• answer.create - whenever a new answer is created
• answer.accept - whenever an answer is accepted
• answer.approve - whenever an answer is approved by moderator
• report.create - whenever a new report is created
• comment.create - whenever a new comment is created
• user.signin - whenever a user signs in to the system
• user.signup - whenever a new user is created
• user.search - whenever a user performs a search
• revision.restore - whenever a revision is restored
• user.ban - Pro whenever a user is banned
• user.mention - Pro whenever a user is mentioned
• question.like - Pro whenever a question is favorited

The event playloads for events user.signin, question.view and user.search contain extra information about the client which made the original request, e.g. IP address, User-Agent and Referrer headers.

In addition to the standard event, Para also sends webhooks to the following core (CRUD) events, for all object types: create, update, delete, createAll, updateAll, deleteAll.

You can subscribe to any of these custom events in Scoold using the REST API like so:

{
  "targetUrl": "https://myurl",
  "typeFilter": "revision",
  "urlEncoded": false,
  "create": true,
  "update": false,
  "delete": false,
  "createAll": true,
  "updateAll": false,
  "deleteAll": false,
  "customEvents": ["revision.create"]
}

This will create a new custom event revision.create which will fire whenever a new revision is created. This makes it easy to integrate Scoold with services like Zapier because it implements the RESTHooks best practices.

Finally, you can configure a webhook so that it is only fired when the payload matches a certain filter. A filter could contain one or more values of a property, e.g. tags:tag1,tag2. If the payload inside the webhook matches the filter, then the payload is sent to the target URL, otherwise it is ignored. Here are some examples of webhook property filters:

• tags:tag1,tag2 - payload must contain a list property tags and it must have both tag1 and tag2 in it
• tags:tag1|tag2 - payload must contain a list property tags and it must have either tag1 or tag2 in it
• name:Gordon - payload must contain a String property and it must be Gordon
• name:Gordon|Joe - payload must contain a String property and it must be either Gordon or Joe
• tags:- - payload must contain a list or string property tags and it must be empty

For more details about webhooks, please read the Para docs on webhooks.

Session management and duration

By default, only one session is allowed per user/browser. When a user logs in from one device, they will automatically be logged out from every other device. This can be disabled to allow multiple simultaneous sessions with:

scoold.security.one_session_per_user = false

User session cookies in Scoold expire after 24h. To change the session duration period to 6h for example, set scoold.session_timeout = 21600 (6h in seconds) and restart. In 6h the Scoold authentication cookie will expire and so will the access token (JWT) inside the cookie.

Domain-restricted user registrations

You can restrict signups only to users from a particular identity domain, say acme-corp.com. To do so, set the following configuration property:

scoold.approved_domains_for_signups = "acme-corp.com"

Then a user with email [email protected] will be allowed to login (the identity provider is irrelevant), but user [email protected] will be denied access.

PRO In Scoold Pro, this setting can also contain a comma-separated list of identity domains:

scoold.approved_domains_for_signups = "acme-corp.com,gmail.com"

Admins

You can specify the user with administrative privileges in your scoold-application.conf file:

scoold.admins = "[email protected]"

PRO In Scoold Pro, you can have multiple admin users by specifying a comma-separated list of user identifiers. This works both for new and existing users.

scoold.admins = "[email protected],fb:1023405345366,gh:1234124"

If you remove users who are already admins from the list of admins scoold.admins, they will be demoted to regular users. Similarly, existing regular users will be promoted to admins if they appear in the list above.

Anonymous posts

PRO This feature is enabled with scoold.anonymous_posts_enabled = true. It allows everyone to ask questions and write replies, without having a Scoold account. Posting to the "Feedback" section will also be open without requiring users to sign in. This feature is disabled by default.

Anonymous profiles

People may wish to make their profile details anonymous from the Settings page. To allow this option set:

scoold.profile_anonimity_enabled = true

Spam protection

Scoold can be configured to detect and block spam content with the help of the Akismet API. To enable this functionality, specify your Akismet API key like this:

scoold.akismet_api_key = "xyz123"

By default, all content published on the site will be scanned for spam by Akismet and if spam is detected, that content will be ignored and the user will get an error, preventing them from posting it. If you turn off automatic protection, a report will be created each time a spam post is detected so that mods/admins can take action on it. In the meantime the post would be marked as "pending approval".

scoold.automatic_spam_protection_enabled = false

Enabling the "Feedback" section

You can enable or disable the "Feedback" page where people can discuss topics about the website itself or submit general feedback. This section is disabled by default and can be activated with scoold.feedback_enabled = true.

LaTeX/MathML support and advanced highlighting

PRO You can enable this feature by setting scoold.mathjax_enabled = true. Then you can use MathML expressions by surrounding them with $$ signs, e.g. $$ \frac {1}{2} $$ By default, MathJax is disabled.

The Prism syntax highlighter is included and it supports many different languages. You need to specify the language for each code block if you want the highlighting to be more accurate (see all supported languages). For example:

```csharp
var dict = new Dictionary<string>();
```

File uploads

PRO Files can be uploaded to the local file system or to cloud storage. File uploads are enabled by default in Scoold Pro. To disable file uploads altogether set scoold.uploads_enabled = false. To protect uploaded files from unauthenticated access, set scoold.uploads_require_auth = true.

To upload a file just drag & drop the file onto the post editor area. A link will automatically appear when the upload is finished. Uploads can fail either because their size is too large or because their format is not in the white list of permitted formats (documents, images, archives, audio or video). You can extend the list of permitted file types by configuring:

scoold.allowed_upload_formats = "yml,py:text/plain,json:application/json"

If the MIME type is not specified in the format extension:mime_type, the default text/plain is used when serving these files.

View list of allowed file formats for uploads

File extension	MIME type
jpg	image/jpeg
jpeg	image/jpeg
jpe	image/jpeg
gif	image/gif
png	image/png
bmp	image/bmp
tiff	image/tiff
tif	image/tiff
ico	image/x-icon
svg	image/svg+xml
webp	image/webp
asf	video/x-ms-asf
asx	video/x-ms-asf
wmv	video/x-ms-wmv
wmx	video/x-ms-wmx
wm	video/x-ms-wm
avi	video/avi
divx	video/divx
flv	video/x-flv
mov	video/quicktime
qt	video/quicktime
mpeg	video/mpeg
mpg	video/mpeg
mpe	video/mpeg
mp4	video/mp4
m4v	video/mp4
ogv	video/ogg
webm	video/webm
mkv	video/x-matroska
3gp	video/3gpp
3gpp	video/3gpp
3g2	video/3gpp2
3gp2	video/3gpp2
mp3	audio/mpeg
m4a	audio/mpeg
m4b	audio/mpeg
aac	audio/aac
ra	audio/x-realaudio
ram	audio/x-realaudio
wav	audio/wav
ogg	audio/ogg
oga	audio/ogg
flac	audio/flac
mid	audio/midi
midi	audio/midi
wma	audio/x-ms-wma
wax	audio/x-ms-wax
mka	audio/x-matroska
txt	text/plain
xml	text/xml
yml	application/x-yaml
yaml	application/x-yaml
json	application/json
java	text/x-java
py	text/x-python
cs	text/x-csharp
asc	text/plain
c	text/x-csrc
h	text/x-chdr
cc	text/x-c++src
hh	text/x-c++hdr
srt	text/plain
csv	text/csv
tsv	text/tab-separated-values
ics	text/calendar
rtx	text/richtext
css	text/css
vtt	text/vtt
dfxp	application/ttaf+xml
rtf	application/rtf
pdf	application/pdf
tar	application/x-tar
zip	application/zip
gz	application/x-gzip
gzip	application/x-gzip
rar	application/rar
7z	application/x-7z-compressed
psd	application/octet-stream
xcf	application/octet-stream
doc	application/msword
pot	application/vnd.ms-powerpoint
pps	application/vnd.ms-powerpoint
ppt	application/vnd.ms-powerpoint
wri	application/vnd.ms-write
xla	application/vnd.ms-excel
xls	application/vnd.ms-excel
xlt	application/vnd.ms-excel
xlw	application/vnd.ms-excel
mdb	application/vnd.ms-access
mpp	application/vnd.ms-project
docx	application/vnd.openxmlformats-officedocument.wordprocessingml.document
docm	application/vnd.ms-word.document.macroEnabled.12
dotx	application/vnd.openxmlformats-officedocument.wordprocessingml.template
dotm	application/vnd.ms-word.template.macroEnabled.12
xlsx	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
xlsm	application/vnd.ms-excel.sheet.macroEnabled.12
xlsb	application/vnd.ms-excel.sheet.binary.macroEnabled.12
xltx	application/vnd.openxmlformats-officedocument.spreadsheetml.template
xltm	application/vnd.ms-excel.template.macroEnabled.12
xlam	application/vnd.ms-excel.addin.macroEnabled.12
pptx	application/vnd.openxmlformats-officedocument.presentationml.presentation
pptm	application/vnd.ms-powerpoint.presentation.macroEnabled.12
ppsx	application/vnd.openxmlformats-officedocument.presentationml.slideshow
ppsm	application/vnd.ms-powerpoint.slideshow.macroEnabled.12
potx	application/vnd.openxmlformats-officedocument.presentationml.template
potm	application/vnd.ms-powerpoint.template.macroEnabled.12
ppam	application/vnd.ms-powerpoint.addin.macroEnabled.12
sldx	application/vnd.openxmlformats-officedocument.presentationml.slide
sldm	application/vnd.ms-powerpoint.slide.macroEnabled.12
onetoc	application/onenote
onetoc2	application/onenote
onetmp	application/onenote
onepkg	application/onenote
oxps	application/oxps
xps	application/vnd.ms-xpsdocument
odt	application/vnd.oasis.opendocument.text
odp	application/vnd.oasis.opendocument.presentation
ods	application/vnd.oasis.opendocument.spreadsheet
odg	application/vnd.oasis.opendocument.graphics
odc	application/vnd.oasis.opendocument.chart
odb	application/vnd.oasis.opendocument.database
odf	application/vnd.oasis.opendocument.formula
wp	application/wordperfect
wpd	application/wordperfect
key	application/vnd.apple.keynote
numbers	application/vnd.apple.numbers
pages	application/vnd.apple.pages

By default, the size of uploaded files is unrestricted. To limit the maximum size of uploads, set the following Spring Boot system properties:

spring.servlet.multipart.max-file-size = "2MB"
spring.servlet.multipart.max-request-size = "10MB"

Scoold Pro also allows users to capture and upload video and audio from their input devices (mic/webcam). This functionality is enabled by default:

scoold.media_recording_allowed = true

Profile pictures (avatars) can also be changed by dragging a new image on top of the existing profile picture on a user's /profile page. For best results, use a square image here.

Local storage

Local file storage is used by default. To configure the directory on the server where files will be stored, set:

scoold.file_uploads_dir = "uploads"

AWS S3 storage provider

To use S3 for file storage, specify the name of the S3 bucket where you want the files to be uploaded. AWS credentials and region settings are optional as they can be picked up from the environment automatically.

# required
scoold.s3_bucket = ""
# path within the bucket (object prefix)
scoold.s3_path = "uploads"
# these are optional
scoold.s3_region = ""
scoold.s3_access_key = ""
scoold.s3_secret_key = ""

Azure Blob storage provider

To use Azure Blob storage for storing uploaded files, first you'll need to create a storage account and get a SAS URL and token. Scoold Pro will need full permissions to your storage container so it's best that you dedicate a container just for Scoold files.

# required
scoold.blob_storage_account = ""
scoold.blob_storage_token = ""
# name of the container
scoold.blob_storage_container = ""
# path prefix within a container (subfolder)
scoold.blob_storage_path = "uploads"

Uploading custom avatars

This feature is available in both Scoold and Scoold Pro. You can configure Scoold to upload custom profile pictures to a cloud-based image hosting service like Imgur or Cloudinary. In Scoold Pro, avatars are uploaded to the configured storage provider, but by configuring Imgur or Cloudinary for avatars, you will essentially change where avatars are stored and served from.

To Imgur

To use Imgur for storing images, specify your Imgur API client id:

scoold.imgur_client_id = "x23e8t0askdj"
scoold.avatar_repository = "imgur"

Keep in mind that only images can be uploaded to Imgur and other restrictions may apply.

To Cloudinary

To use Cloudinary for storing images, specify your Cloudinary API client id:

scoold.cloudinary_url = "cloudinary://123456:abcdefaddd@scoold"
scoold.avatar_repository = "cloudinary"

Keep in mind that only images can be uploaded to Cloudinary and other restrictions may apply.

You must create several presets on your cloudinary account:

• avatar (upload preset): for processing when receiving a file (example: c_thumb,g_face,h_404,q_auto:good,w_404,z_0.4)
• square25: for the display in 25x25 format (example: c_scale,h_25,q_auto:eco,w_25)
• square32: for displaying in 32x32 format (example: c_scale,h_32,q_auto:eco,w_32)
• square50: for displaying in 50x50 format (example: c_scale,h_50,q_auto:good,w_50)
• square127: for displaying in 127x127 format (example: c_scale,h_127,q_auto:good,w_127)
• profile: for displaying in 404x404 format (example: c_scale,h_404,q_auto:good,w_404)

Slack integration

PRO Scoold Pro integrates with Slack on a number of levels. First, Scoold users can sign in with Slack. They can also use slash commands to search and post questions. Also Scoold can notify Slack users when they are mentioned on Scoold. Finally, Scoold allows you to map spaces to Slack workspaces or channels. By default, each Slack workspace (team) is mapped to a single Scoold space when people sign in with Slack.

Important: Most of the Slack operations require a valid Slack ID stored in Scoold which enables the mapping of Slack users to Scoold accounts and vice versa. Slack IDs are set automatically when a Scoold user signs in with Slack.

The integration endpoint for Slack is /slack - this is where Scoold will accept and process requests from Slack. To enable the Slack integration you need to register for a Slack app first and set scoold.sl_app_id and scoold.sl_secret.

Getting started guide for Scoold + Slack.

Here are the configuration properties for Slack:

# Slack OAuth2 client id
scoold.sl_app_id = ""
# Slack OAuth2 secret
scoold.sl_secret = ""

scoold.slack.app_id = "SHORT_APPID"
scoold.slack.map_workspaces_to_spaces = true
scoold.slack.map_channels_to_spaces = false
scoold.slack.post_to_space = "workspace|scooldspace:myspace|default"

scoold.slack.notify_on_new_question = true
scoold.slack.notify_on_new_answer = true
scoold.slack.notify_on_new_comment = true
scoold.slack.dm_on_new_comment = false
scoold.slack.default_question_tags = "via-slack"
scoold.slack.auth_enabled = true

Setting scoold.slack.map_channels_to_spaces will ask for additional permissions, namely channels:read and groups:read. On sign in, Scoold will read all your channels and create spaces from them. The workspace space is always created if scoold.slack.map_workspaces_to_spaces = true, which is the default setting.

When creating questions from Slack they are posted to the channel workspace by default, if scoold.slack.map_channels_to_spaces is enabled. For example, in this case, for a team "My Team" and channel "chan", your space will become "My Team #chan". This is controlled by scoold.slack.post_to_space which is blank by default. If you set it to workspace, then questions will be posted to the "My Team" space. Or you could set a specific Scoold space to post to with scoold.slack.post_to_space = "scooldspace:myspace". If the value is default then all questions posted from Slack will go to the default space.

You can also create answers to questions from Slack, either from the message action button or by typing in the /scoold ask command. This requires the URL of a specific question you wish to answer.

Clicking the "Ask on Scoold" message action will also save the full message thread on Scoold. The action will create a new question from the first message of the thread and save each reply as an answer on Scoold.

When scoold.slack.dm_on_new_comment is enabled, Scoold will send a direct message notification to the author of the post on which somebody commented. By default, DMs are turned off and the notification is sent to the channel instead.

Slack authentication can be disabled with scoold.slack.auth_enabled = false and the "Continue with Slack" button will be hidden away.

Slash commands in Slack

Typing in /scoold help gives you a list of commands available:

• /scoold - Interact with your Scoold server
• /scoold ask [text] Ask a question directly, first sentence becomes the title. Example: /scoold ask How does this work? @john I'm having troubles with...
• /scoold answer [question URL] [answer] Answer a question directly. Example: /scoold answer https://host/question/123 This is my answer to your question, @john.
• /scoold search [query] Search for questions. Example: /scoold search solution AND quick*
• /scoold search-people [query] Search for people. Example: /scoold search-people John*
• /scoold search-tags [query] Search for tags. Example: /scoold search-tags solution*
• /scoold version Get version information for Scoold and Para.
• /scoold whoami Get information for your Scoold account.
• /scoold stats Get general statistics.

Message actions in Slack

Here are the interactive message actions which are currently implemented:

• create_question - "Ask on Scoold", Creates a new question on Scoold directly from a chat message.
• create_question_dialog - "Edit & ask on Scoold", Opens up a dialog to edit question before posting.
• create_answer_dialog - "Answer on Scoold", Opens up a dialog to edit your answer before posting.

These allow you to perform actions from any channel and best of all, these can turn any chat message into a question or answer.

If you get an error "User not authorised to open dialogs" it means that your Scoold user is not logged in via Slack and Scoold doesn't have a Slack access token on record. Simply log into Scoold with Slack and the error should go away.

Mattermost integration

PRO Scoold Pro also integrates with Mattermost. Scoold users can sign in with Mattermost, use slash commands to interact with Scoold and also get in-chat notification for mentions and new posts on Scoold. Scoold allows you to map spaces to Mattermost teams or channels. By default, each Mattermost team is mapped to a single Scoold space when people sign in with Mattermost.

Important: Most of the Mattermost operations require a valid Mattermost ID stored in Scoold which enables the mapping of Mattermost users to Scoold accounts and vice versa. Mattermost IDs are set automatically when a Scoold user signs in with Mattermost.

The integration endpoint for Mattermost is /mattermost - this is where Scoold will accept and process requests from Mattermost. To enable the Mattermost integration you must create a new OAuth 2.0 app in Mattermost's System Console. Get the app's credentials and add them to your Scoold configuration as scoold.mm_app_id and scoold.mm_secret.

If you just want the Scoold-Mattermost integration working and don't want your users to login with Mattermost, you have the option to disable the Mattermost authentication button on the sign in page:

scoold.mattermost.auth_enabled = false

Getting started guide for Scoold + Mattermost.

Here are the configuration properties for Mattermost:

# Mattermost OAuth2 client id
scoold.mm_app_id = ""
# Mattermost OAuth2 client secret
scoold.mm_secret = ""

scoold.mattermost.server_url = "http://localhost:8065"
scoold.mattermost.bot_username = "scoold"
scoold.mattermost.bot_icon_url = "http://localhost:8000/images/logowhite.png"
scoold.mattermost.map_workspaces_to_spaces = true
scoold.mattermost.map_channels_to_spaces = false
scoold.mattermost.post_to_space = "workspace|scooldspace:myspace|default"

scoold.mattermost.notify_on_new_question = true
scoold.mattermost.notify_on_new_answer = true
scoold.mattermost.notify_on_new_comment = true
scoold.mattermost.dm_on_new_comment = false
scoold.mattermost.default_question_tags = "via-mattermost"

Note: Mattermost does not support message actions like in Slack. This means that you can't create a question from a any chat message. The reply dialog box can be opened from a "Reply" button under each question notification message or via the /scoold answer-form command. The dialog box for new questions is opened via the new slash command /scoold ask-form.

All the other slash commands and notifications work just like with Slack and are described above. The Mattermost integration will automatically create a slash command for each channel linked to Scoold on the admin page.

When scoold.mattermost.dm_on_new_comment is enabled, Scoold will send a direct message notification to the author of the post on which somebody commented. By default, DMs are turned off and the notification is sent to the channel instead.

You can also save a full message thread on Scoold with the command /scoold save {thread_link} - this will create a new question from the first message of the thread and save each reply as an answer on Scoold.

Microsoft Teams integration

PRO Scoold Pro also integrates with Microsoft Teams. Scoold users can sign in with a Microsoft account, use bot commands to interact with Scoold and also get in-chat notification for mentions and new posts on Scoold. Scoold allows you to map spaces to teams or channels. By default, each team in MS Teams is mapped to a single Scoold space when people sign in with Microsoft.

Important: Most of the Teams operations require a valid Microsoft ID stored in your Scoold profile which enables the mapping of Teams users to Scoold accounts and vice versa. Microsoft IDs are added to each profile automatically when a Scoold user signs in with Microsoft.

The integration endpoint for Teams is /teams - this is where Scoold will accept and process requests from MS Teams. To enable the Teams integration you first need to create a new bot for your app. After creating the bot, take note of its ID and client secret and add those to your Scoold configuration file. Then sideload (upload) the Scoold.zip app package in the Teams Developer Portal. The app package can be downloaded from the Administration page after your bot has been created. Also set scoold.ms_app_id and scoold.ms_secret as you normally would for an OAuth2 authentication with Microsoft.

Note: Clicking the "Ask on Scoold" message extension button will also save the full message thread on Scoold. The action will create a new question from the first message of the thread and save each reply as an answer on Scoold.

Getting started guide for Scoold + Teams.

Here are the configuration properties for MS Teams:

# Microsoft OAuth2 client id
scoold.ms_app_id = ""
# Microsoft OAuth2 secret
scoold.ms_secret = ""

scoold.teams.bot_id = ""
scoold.teams.bot_secret = ""
scoold.teams.map_workspaces_to_spaces = true
scoold.teams.map_channels_to_spaces = false
scoold.teams.post_to_space = "workspace|scooldspace:myspace|default"

scoold.teams.notify_on_new_question = true
scoold.teams.notify_on_new_answer = true
scoold.teams.notify_on_new_comment = true
scoold.teams.dm_on_new_comment = false
scoold.teams.default_question_tags = "via-teams"

You can type @Scoold help to get a list of all supported actions. All the other bot commands and notifications work just like with Slack and Mattermost, described above. A bot registration is required for the Teams integration and it has to be created manually from the Teams Developer Portal.

When scoold.teams.dm_on_new_comment is enabled, Scoold will send a direct message notification to the author of the post on which somebody commented. By default, DMs are turned off and the notification is sent to the channel instead.

If you wish to hide the Microsoft login button "Continue with Microsoft", you can do it by adding this to your configuration:

scoold.teams.auth_enabled = false

Notifications in Slack/Mattermost/Teams

Scoold will notify the channels where you have it installed, whenever a new question or answer is created, and also whenever a user is mentioned. To install the application on multiple channels go to the Administration page and click one of the "Add to Slack/Mattermost/Teams" buttons for each channel where you wish to get notifications. You can receive notification on up to 10 channels simultaneously. Notifications for new posts will go to the channel associated with the space in which the post was created. For example, when using Slack, if scoold.slack.map_workspaces_to_spaces is true, and a question is created in space "Team1 #general", Scoold will search for webhook registrations matching that team/channel combination and only send a notification there. Direct message webhooks will be used only if there's no space-matching channel found.

Approving new posts from Slack/Mattermost/Teams

This works if you have enabled scoold.posts_need_approval. When a new question or answer is created by a user with less reputation than the threshold, a notification message will be sent to Slack/Mattermost/Teams, giving you the option to either approve or delete that post. The action can only be performed by moderators.

Self-hosting Para and Scoold with HTTPS

The recommended way for enabling HTTPS with your own SSL certificate in a self-hosted environment is to run a proxy server like NGINX in front of Scoold and Para. As an alternative you can use Apache or Lighttpd.

1. Start Para on port :8080
2. Start Scoold on port :8000
3. Start NGINX with the configuration below

Example configuration for NGINX

server_tokens off;
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options nosniff;

server {
  listen 80 default_server;
  listen [::]:80 default_server;
  server_name www.domain.com domain.com;

  # Redirect all HTTP requests to HTTPS with a 301 Moved Permanently response.
  return 301 https://$host$request_uri;
}

server {
  listen 443 ssl http2;
  listen [::]:443 ssl http2;
  server_name www.domain.com domain.com;

  # certs sent to the client in SERVER HELLO are concatenated in ssl_certificate
  ssl_certificate /etc/ssl/certs/domain.crt;
  ssl_certificate_key /etc/ssl/private/domain.key;
  ssl_session_timeout 1d;
  ssl_session_cache shared:SSL:50m;
  ssl_session_tickets off;

  # modern configuration. tweak to your needs.
  ssl_protocols TLSv1.2;
  ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
  ssl_prefer_server_ciphers on;

  # HSTS (ngx_http_headers_module is required) (15768000 seconds = 6 months)
  add_header Strict-Transport-Security max-age=15768000;

  # OCSP Stapling - fetch OCSP records from URL in ssl_certificate and cache them
  ssl_stapling on;
  ssl_stapling_verify on;

  # Verify chain of trust of OCSP response using Root CA and Intermediate certs
  #ssl_trusted_certificate /path/to/root_CA_cert_plus_intermediates;

  # Cloudflare DNS
  resolver 1.1.1.1;

  # Required for LE certificate enrollment using certbot
  # usually certbot would automatically modify this configuration
  #location '/.well-known/acme-challenge' {
  #  default_type "text/plain";
  #  root /var/www/html;
  #}

  location / {
    proxy_pass http://127.0.0.1:8000;
    proxy_redirect http:// $scheme://;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto https;
    proxy_set_header Host $http_host;
  }
}

As an alternative, you can enable SSL and HTTP2 directly in Scoold:

1. Run the script gencerts.sh to generate the required self-signed certificates

   echo "scoold.local" | sudo tee -a /etc/hosts
   ./gencerts.sh scoold.local secret
   

   The result of that command will be 8 files - ScooldRootCA.(crt,key,pem), scoold.local.(crt,key,pem) as well as a Java Keystore file scoold-keystore.p12 and a Truststore file scoold-truststore.p12. Optionally, you can run generate the server certificates using an existing RootCA.pem and RootCA.key files like so:

   ./gencerts.sh para.local secret /path/to/ca/RootCA
   

2. Run Scoold using the following command which enables SSL and HTTP2:

   java -jar -Dconfig.file=./scoold-application.conf \
    -Dserver.ssl.key-store-type=PKCS12 \
    -Dserver.ssl.key-store=scoold-keystore.p12 \
    -Dserver.ssl.key-store-password=secret \
    -Dserver.ssl.key-password=secret \
    -Dserver.ssl.key-alias=scoold \
    -Dserver.ssl.enabled=true \
    -Dserver.http2.enabled=true \
   scoold-*.jar
   

3. Trust the root CA file ScooldRootCA.crt by importing it in you OS keyring or browser (check Google for instructions).

4. Open https://scoold.local:8000

Securing Scoold with TLS using Nginx and Certbot (Let's Encrypt)

First of all, configure the DNS records for your domain to point to the IP address where Scoold is hosted.

1. SSH into your Ubuntu server and install Nginx and Certbot

   sudo apt-get install nginx certbot python-certbot-nginx
   

2. Get a certificate and autoconfigure nginx to use it

   sudo certbot --nginx
   

3. Turn on the Ubuntu firewall to block port 8000 and only allow ports 80 and 443.

   ufw allow 'Nginx Full' && sudo ufw enable
   

4. Configure nginx to forward requests from the web on ports 80 and 443 to localhost:8000

   location / {
   	proxy_pass http://127.0.0.1:8000;
   	proxy_redirect http:// $scheme://;
   	proxy_set_header X-Real-IP $remote_addr;
   	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   	proxy_set_header X-Forwarded-Proto https;
   	proxy_set_header Host $http_host;
   }
   

That's it! If the Certbot validation above fails, your DNS is not configured properly or you have conflicting firewall rules. Refer to this article for more details.

Mutual TLS authentication

You can enable mTLS between Scoold and Para, as well as between Scoold and a proxy like Nginx. There are two ways to do that:

• each service can trust each other's public certificate
• each service can use a TLS certificate signed by a CA which is trusted by all services

mTLS between Scoold and an TLS-terminating Nginx proxy

To go the first route, execute the getcerts.sh script as shown above. You may need to run it once for Scoold and once for Nginx, unless Nginx has its own certificate already. Then add the Nginx certificate to the Truststore.

./gencerts.sh scoold.local secret
keytool -v -importcert -file /path/to/nginx_public_cert.pem -alias nginx -keystore scoold-nginx-truststore.p12 -storepass secret -noprompt

Configure Nginx to trust the CA which was used to sign Scoold's server certificate:

server_name scoold-pro.local;
listen 443 ssl http2;
location / {
	proxy_pass https://scoold.local:8000;
	proxy_redirect http:// $scheme://;
	proxy_set_header X-Real-IP $remote_addr;
	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	proxy_set_header X-Forwarded-Proto https;
	proxy_set_header Host $http_host;

	proxy_ssl_certificate /path/to/nginx_public_cert.pem;
	proxy_ssl_certificate_key /path/to/nginx_public_cert.key;
	proxy_ssl_trusted_certificate /path/to/RootCA.pem;
  proxy_ssl_verify on;
  proxy_ssl_verify_depth 2;
}

Run Scoold with this command which enables TLS, HTTP2 and mTLS.

java -jar -Dconfig.file=./scoold-application.conf \
 -Dserver.ssl.key-store-type=PKCS12 \
 -Dserver.ssl.key-store=scoold-keystore.p12 \
 -Dserver.ssl.key-store-password=secret \
 -Dserver.ssl.key-password=secret \
 -Dserver.ssl.trust-store=scoold-nginx-truststore.p12 \
 -Dserver.ssl.trust-store-password=secret \
 -Dserver.ssl.key-alias=scoold \
 -Dserver.ssl.client-auth=need \
 -Dserver.ssl.enabled=true \
 -Dserver.http2.enabled=true
scoold-*.jar

If you want to trust the Root CA instead, the steps are similar but in the Nginx configuration use this line:

ssl_client_certificate /path/to/RootCA.pem;

And start Scoold using the previously generated Truststore scoold-truststore.p12 which should already contain the Root CA.

mTLS between Scoold and Para

To go the first route, execute the getcerts.sh script as shown above for both Scoold and Para. Then create a Truststore for each service which contains the certificate of the other.

./gencerts.sh scoold.local secret
./gencerts.sh para.local secret
keytool -v -importcert -file scoold.local.pem -alias scoold -keystore para-scoold-truststore.p12 -storepass secret -noprompt
keytool -v -importcert -file para.local.pem -alias para -keystore scoold-para-truststore.p12 -storepass secret -noprompt

Run Para with this command which enables TLS, HTTP2 and mTLS.

java -jar -Dconfig.file=/para/para-application.conf \
 -Dserver.ssl.key-store-type=PKCS12 \
 -Dserver.ssl.key-store=para-keystore.p12 \
 -Dserver.ssl.key-store-password=secret \
 -Dserver.ssl.key-password=secret \
 -Dserver.ssl.trust-store=para-scoold-truststore.p12 \
 -Dserver.ssl.trust-store-password=secret \
 -Dserver.ssl.key-alias=para \
 -Dserver.ssl.client-auth=need \
 -Dserver.ssl.enabled=true \
 -Dserver.http2.enabled=true
para-*.jar

Run Scoold with this command which enables TLS, HTTP2 and mTLS.

java -jar -Dconfig.file=/scoold/scoold-application.conf \
 -Dserver.ssl.key-store-type=PKCS12 \
 -Dserver.ssl.key-store=scoold-keystore.p12 \
 -Dserver.ssl.key-store-password=secret \
 -Dserver.ssl.key-password=secret \
 -Dpara.client.ssl_keystore=scoold-keystore.p12 \
 -Dpara.client.ssl_keystore_password=secret \
 -Dpara.client.ssl_truststore=scoold-para-truststore.p12 \
 -Dpara.client.ssl_truststore_password=secret \
 -Dserver.ssl.key-alias=scoold \
 -Dserver.ssl.enabled=true \
 -Dserver.http2.enabled=true
scoold-*.jar

If you want to trust the Root CA instead, the steps are similar but using the previously generated Truststores

• scoold-truststore.p12 and para-truststore.p12 respectively, which should already contain the Root CA.

For end-to-end encryption of traffic, you can enable mTLS between your TLS-terminating proxy (like nginx), Scoold and Para.

Complex proxy server setup

In some rare cases, your Scoold server may be behind more than one proxy server. In these cases you have configuration like this:

scoold.host_url = "http://192.168.3.4:8000"
scoold.host_url = "http://192.168.3.4:8080"

This would work except for transactional emails where inbound links point to the wrong address. The solution is to add this to your configuration:

scoold.rewrite_inbound_links_with_fqdn = "https://public-scoold-domain.com"

Periodic summary emails (email digest)

PRO You can choose to enable periodic summary emails for all users in Scoold or allow them to opt-in for these messages. By default summary emails are disabled and users can unsubscribe if they are enabled by admins. A summary email contains all new questions for a past period of time (daily, weekly). Admins can enable summary emails for everyone from the Settings page if scoold.summary_email_controlled_by_admins = true. If that parameter is false each person (by default) controls whether they want to receive summary emails or not.

The period for which a summary report is generated is controlled by:

scoold.summary_email_period_days = 2

The values of this setting can range from 1 to 30 days, where 2 means "every other day", 7 means "every week". The summary email contains a list of the top 25 recent questions. For more questions set scoold.summary_email_items = 30.

Mentions

PRO In Scoold Pro, you can mention anyone in a question, answer or comment with @Name. A popup menu will appear once you start typing after @ giving you a list of names to choose from. The selected user will be mentioned with a special mention tag in the form of @<userID|John Doe>. You can edit the name part of that tag (after |) but nothing else, if you want the mention to work. You can mention up to 10 people in a post.

Users can opt-in to receive email notifications when they are mentioned or that can be switched on/off by admins. For the latter option set:

scoold.mention_emails_controlled_by_admins = true

In certain cases, there may be lots of people with identical or similar names within a team which could make it difficult to tell them apart when trying to mention them. For such scenarios, there is an option to show additional details for each user, like username and tags. This is enabled like so:

scoold.user_autocomplete_details_enabled = true

Security headers

Scoold attaches several security headers to each response. These can be enabled or disabled with the following configuration properties:

# Strict-Transport-Security
scoold.hsts_header_enabled = true

# X-Frame-Options
scoold.framing_header_enabled = true

# X-XSS-Protection
scoold.xss_header_enabled = true

# X-Content-Type-Options
scoold.contenttype_header_enabled = true

# Referrer-Policy
scoold.referrer_header_enabled = true

Voting

By default, votes expire after a certain period, meaning the same user can vote again on the same post (after 30 days by default). Votes can also be amended within a certain number of seconds (30s by default). There are two configurable parameters which allow you to modify the length of those periods:

scoold.vote_locked_after_sec = 30
scoold.vote_expires_after_sec = 2592000

Customizing the UI

There are a number of settings that let you customize the appearance of the website without changing the code.

scoold.fixed_nav = false
scoold.show_branding = true
scoold.logo_url = "https://static.scoold.com/logo.svg"
scoold.logo_width = 90

# footer HTML - add your own links, etc., escape double quotes with \"
scoold.footer_html = "<a href=\"https://my.link\">My Link</a>"
# show standard footer links
scoold.footer_links_enabled = true
# favicon image location
scoold.favicon_url = "/favicon.ico"
# add your own external stylesheets
scoold.external_styles = "https://mydomain.com/style1.css, https://mydomain.com/style2.css"
# appends extra CSS rules to the main stylesheet
scoold.inline_css = ""
# edit the links in the footer of transactional emails
scoold.emails_footer_html = ""
# change the logo in transactional emails
scoold.small_logo_url = "https://scoold.com/logo.png"
# enable/disable dark mode
scoold.dark_mode_enabled = true
# enabled/disable Gravatars
scoold.gravatars_enabled = true
# pattern of default image of Gravatars (https://fr.gravatar.com/site/implement/images/)
scoold.gravatars_pattern = "retro"

# custom navbar links
scoold.navbar_link1_url = ""
scoold.navbar_link2_url = ""
scoold.navbar_link1_text = "Link1"
scoold.navbar_link2_text = "Link2"
scoold.navbar_link1_target = "_self"
scoold.navbar_link2_target = "_self"

# custom navbar menu links (shown to logged in users)
scoold.navbar_menu_link1_url = ""
scoold.navbar_menu_link2_url = ""
scoold.navbar_menu_link1_text = "Menu Link1"
scoold.navbar_menu_link2_text = "Menu Link2"
scoold.navbar_menu_link1_target = "_self"
scoold.navbar_menu_link2_target = "_self"

# default email notification toggles for all users
scoold.favtags_emails_enabled = false
scoold.reply_emails_enabled = false
scoold.comment_emails_enabled = false

# comment input box toggle
scoold.always_hide_comment_forms = true

# show/hide user profiles and users page
scoold.users_discoverability_enabled = true

Custom Logo

PRO In Scoold Pro, you can change the logo of the website just by dragging and dropping a new image of your choice.

If you wish to add just a few simple CSS rules to the <head> element, instead of replacing the whole stylesheet, simply add them as inline CSS:

scoold.inline_css = ".scoold-logo { width: 100px; }"

Custom welcome message (banner)

You can set a short welcome message for unauthenticated users which will be displayed on the top of the page and it can also contain HTML (use only single quotes or escape double quotes \\\"):

scoold.welcome_message = "Hello and welcome to <a href='https://scoold.com'>Scoold</a>!"

You can also set a custom message for users who are already logged in:

scoold.welcome_message_onlogin = "<h2>Welcome back <img src=\\\"{{user.picture}}\\\" width=30> <b>{{user.name}}</b>!</h2>"

Here you can use HTML tags and Mustache placeholders to show data from the Profile object of the logged in user. For a list of available user properties, take a look at the Profile and Sysprop classes.

Custom links in navbar

There are a total of 4 slots for external links in the navbar area - two links publicly visible can go in the navbar and another two links can go in the navbar menu, shown only to logged in users. Here's how to set a private link in the navbar menu:

scoold.navbar_menu_link1_url = "https://homepage.com"
scoold.navbar_menu_link1_text = "Visit my page"

Expert-level customization

If you want to completely customize the frontend code, clone this repository and edit the files you want:

• HTML templates are in src/main/resources/templates/
• CSS stylesheets can be found in src/main/resources/static/styles/
• JavaScript files can be found in src/main/resources/static/scripts/
• Images are in located in src/main/resources/static/images/
• Themes are in located in src/main/resources/themes/

In Scoold Pro, you don't have access to the files above but you can purchase the Pro with Source code license, for full customization capability.

Also, please refer to the documentation for Spring Boot and Spring MVC.

Third party cookie consent

Some countries have laws that require explicit cookie consent (e.g. GDPR, CCPA). Scoold can be integrated with Osano's cookie consent script to enable the consent popup for compliance with those laws. Here's the configuration which enables cookie consent:

scoold.cookie_consent_required = true
scoold.external_styles = "https://cdn.jsdelivr.net/npm/cookieconsent@3/build/cookieconsent.min.css"
scoold.external_scripts.bypassconsent1 = "https://cdn.jsdelivr.net/npm/cookieconsent@3/build/cookieconsent.min.js"
scoold.external_scripts.bypassconsent2 = "d2luZG93LmNvb2tpZWNvbnNlbnQuaW5pdGlhbGlzZSh7CiAgInBhbGV0dGUiOiB7CiAgICAicG9wdXAiOiB7CiAgICAgICJiYWNrZ3JvdW5kIjogIiM0NDQ0NDQiCiAgICB9LAogICAgImJ1dHRvbiI6IHsKICAgICAgImJhY2tncm91bmQiOiAiIzc3Nzc3NyIKICAgIH0KICB9LAogICJ0aGVtZSI6ICJjbGFzc2ljIiwKICAicG9zaXRpb24iOiAiYm90dG9tLWxlZnQiLAogICJ0eXBlIjogIm9wdC1pbiIsCiAgIm9uU3RhdHVzQ2hhbmdlIjogZnVuY3Rpb24ocyl7bG9jYXRpb24ucmVsb2FkKCk7fQp9KTs="

That last snippet of code is the Base64-encoded initialization of the cookie consent script:

window.cookieconsent.initialise({
  "palette": {
    "popup": {
      "background": "#444444"
    },
    "button": {
      "background": "#777777"
    }
  },
  "theme": "classic",
  "position": "bottom-left",
  "type": "opt-in",
  "onStatusChange": function(s){location.reload();}
});

You can customize the above snippet however you like from Osano's download page (Start coding link). After you customize the snippet, it is important that you add "onStatusChange": function(s){location.reload();} at the end.

Enabling cookie consent will automatically disable all external scripts (like Google Analytics, etc.), until the user gives their explicit consent.

Note: Any other script can be used instead, as long as it set a cookie cookieconsent_status = "allow".

REST API

The REST API can be enabled with the following configuration:

scoold.api_enabled = true
# A random string min. 32 chars long
scoold.app_secret_key = "change_to_long_random_string"

The API can be accessed from /api/* and the OpenAPI documentation and console are located at /apidocs. API keys can be generated from the "Administration" page and can be made to expire after a number of hours or never (validity period = 0). Keys are in the JWT format and signed with the secret defined in scoold.app_secret_key. API keys can also be generated with any JWT library. The body of the key should contain the iat, appid and exp claims and must be signed with the secret scoold.app_secret_key.

Note: The Scoold API also accepts Para "super" tokens (manually generated) or JWTs generated using the Para CLI tool.

You can use the public endpoint http://localhost:8000/api to check the health of the server. A GET /api will return 200 if the server is healthy and connected to Para, otherwise status code 500 is returned. The response body is similar to this:

{
  "healthy": true,
  "message": "Scoold API, see docs at http://localhost:8000/apidocs",
  "pro": false
}

API clients can be auto-generated using Swagger Codegen. You can also open the API schema file in the Swagger Editor and generate the clients from there.

Support

You can get support here by submitting an issue. Also you can head over to the Gitter chat room for help. Issues related to Scoold Pro must be reported to Erudika/scoold-pro. Paid/priority support is also available.

Getting help

• Have a question? - ask it on Gitter
• Found a bug? - submit a bug report here
• Ask a question on Stack Overflow using the scoold tag
• For questions related to Para, use the para tag on Stack Overflow

Blog

Read more about Scoold on our blog

Translating Scoold

You can translate Scoold to your language by copying the English language file and translating it. When you're done, change the file name from "lang_en.properties" to "lang_xx.properties" where "xx" is the language code for your locale. Finally, open a pull request here.

Language	File	Progress
Albanian	lang_sq.properties	0%
Arabic	lang_ar.properties	✔️ (Google Translate)
Belarusian	lang_be.properties	0%
Bulgarian	lang_bg.properties	✔️
Catalan	lang_ca.properties	0%
Chinese (Traditional)	lang_zh_tw.properties	✔️ Thanks Kyon Cheng!
Chinese (Simplified)	lang_zh_cn.properties	✔️ Thanks Kyon Cheng!
Croatian	lang_hr.properties	0%
Czech	lang_cs.properties	0%
Danish	lang_da.properties	✔️ Thanks @viking1972!
Dutch	lang_nl.properties	✔️ Thanks Jan Halsema!
English	lang_en.properties	✔️
Estonian	lang_et.properties	0%
Farsi	lang_fa.properties	✔️ Thanks Sadegh G. Shohani!
Finnish	lang_fi.properties	0%
French	lang_fr.properties	✔️ Thanks Charles Maheu!
German	lang_de.properties	✔️ Thanks Patrick Gäckle!
Greek	lang_el.properties	0%
Hebrew	lang_iw.properties	✔️ Thanks David A.
Hindi	lang_hi.properties	✔️ Thanks Rakesh Gopathi!
Hungarian	lang_hu.properties	0%
Icelandic	lang_is.properties	0%
Indonesian	lang_in.properties	0%
Irish	lang_ga.properties	0%
Italian	lang_it.properties	✔️ Thanks Marco Livrieri!
Japanese	lang_ja.properties	✔️ Thanks Mozy Okubo!
Korean	lang_ko.properties	✔️ Thanks HyunWoo Jo!
Lithuanian	lang_lt.properties	0%
Latvian	lang_lv.properties	0%
Macedonian	lang_mk.properties	0%
Malay	lang_ms.properties	0%
Maltese	lang_mt.properties	0%
Norwegian	lang_no.properties	0%
Polish	lang_pl.properties	0%
Portuguese	lang_pt.properties	✔️ Thanks Karina Varela!
Romanian	lang_ro.properties	0%
Russian	lang_ru.properties	✔️ Thanks Vladimir Perevezentsev!
Serbian	lang_sr.properties	0%
Slovak	lang_sk.properties	0%
Slovenian	lang_sl.properties	0%
Spanish	lang_es.properties	✔️ Thanks Trisha Jariwala!
Swedish	lang_sv.properties	0%
Thai	lang_th.properties	0%
Turkish	lang_tr.properties	✔️ Thanks Aysad Kozanoglu!
Ukrainian	lang_uk.properties	0%
Vietnamese	lang_vi.properties	0%

You can also change the default language of Scoold for all users by setting scoold.default_language_code = "en", where instead of "en" you enter the 2-letter code of the language of your choice.

Building Scoold

To compile it you'll need JDK 8+ and Maven. Once you have it, just clone and build:

$ git clone https://github.com/erudika/scoold.git && cd scoold
$ mvn install

To run a local instance of Scoold for development, use:

$ mvn -Dconfig.file=./scoold-application.conf spring-boot:run

To generate a WAR package, run:

$ mvn -Pwar package

Contributing

1. Fork this repository and clone the fork to your machine
2. Create a branch (git checkout -b my-new-feature)
3. Implement a new feature or fix a bug and add some tests
4. Commit your changes (git commit -am 'Added a new feature')
5. Push the branch to your fork on GitHub (git push origin my-new-feature)
6. Create new Pull Request from your fork

Please try to respect the code style of this project. To check your code, run it through the style checker:

mvn validate

For more information, see CONTRIBUTING.md

License

Apache 2.0