Initial draft of a chrome extension for zipkin

Author: eirslett

.babelrc

@@ -0,0 +1,4 @@
+{
+  "presets": ["es2015"],
+  "plugins": ["transform-object-rest-spread", "transform-react-jsx"]
+}

.editorconfig

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+[*.js]
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true

.gitignore

@@ -1 +1,2 @@
 dist
+node_modules

LICENSE

@@ -0,0 +1,53 @@
+Apache License
+
+Version 2.0, January 2004
+
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
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+
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+7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License.
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+9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability.
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+END OF TERMS AND CONDITIONS

README.md

@@ -6,6 +6,10 @@ This is an extension to the Chrome browser that lets you trigger trace generatio
 
 TODO: This extension will later be submitted to Chrome Web Store, where it will be available for free.
 
+## Usage
+
+
+
 ## Developing
 
 - git clone [repo url] into [working directory]
@@ -16,5 +20,7 @@ TODO: This extension will later be submitted to Chrome Web Store, where it will
 
 ## Building/publishing
 
+- npm install
 - npm run build
 
+This will build a .zip file that should be uploaded to Chrome Web Store.

build.js

@@ -0,0 +1,35 @@
+#!/usr/env/node
+const webpack = require('webpack');
+const JSZip = require('jszip');
+const fs = require('fs');
+const webpackConfig = Object.assign(
+  {},
+  require('./webpack.config.js'), {
+    bail: true
+  }
+);
+
+console.log('Running Webpack...');
+webpack(webpackConfig, (err, stats) => {
+  if (err) {
+    console.log('Webpack error', err.message);
+    process.exit(1);
+  } else {
+    console.log('Webpack run OK');
+    console.log('Generating zip...');
+    const zip = new JSZip();
+    [
+      'devtools.html',
+      'manifest.json',
+      'panel.html',
+      'zipkin.png',
+      'dist/background.bundle.js',
+      'dist/devtools.bundle.js',
+      'dist/panel.bundle.js'
+    ].forEach(f => zip.file(f, fs.readFileSync(f)));
+    fs.writeFileSync('dist/zipkin-chrome-extension.zip', zip.generate({type: 'nodebuffer'}));
+    console.log('Zip was generated.');
+    // zip.folder('dist');
+
+  }
+});

devtools.html

@@ -0,0 +1,10 @@
+<!doctype html>
+<html>
+<head>
+    <meta charset="utf-8" />
+    <title>Zipkin Chrome Extension</title>
+</head>
+<body>
+<script src="dist/devtools.bundle.js"></script>
+</body>
+</html>

docs/README.md

@@ -0,0 +1,18 @@
+Usage
+=====
+
+1) Install the extension, either via Chrome Web Store, or build it manually from source.
+
+2) Open Chrome and go to a web site, right-clict -> Inspect. This will open Chrome developer tools.
+
+3) A panel appears, called Zipkin. Choose it.
+
+4) Here, you'll need to configure the URL to your Zipkin UI/query server.
+
+Once you've provided a URL, Chrome will attempt to contact that server, and "auto-discover" its configuration.
+You can configure multiple Zipkin endpoints if you want to; e.g. one for your development environment, and one for production.
+In this example case, we specified there's a Zipkin UI running on http://localhost:9411, which probably isn't what you will have in an actual environment; only if you're running the Zipkin server locally. Usually, it would be set to something like http://zipkin.mysite.com/.
+
+5) Use your application and generate traces
+While you navigate around, Chrome will add Zipkin trace headers to all HTTP requests. In the Zipkin extension, you can
+click on a generated trace ID to take you directly to the Zipkin UI, displaying that trace.

docs/add-zipkin-endpoint.png

@@ -0,0 +1,19 @@
+{
+  "manifest_version": 2,
+  "name": "Zipkin Chrome Extension",
+  "description": "Lets you trigger Zipkin traces from the browser, while using your application",
+  "version": "1.0",
+  "devtools_page": "devtools.html",
+  "background": {
+    "scripts": ["dist/background.bundle.js"],
+    "persistent": true
+  },
+  "permissions": [
+    "activeTab",
+    "webRequest",
+    "webRequestBlocking",
+    "storage",
+    "http://*/",
+    "https://*/"
+  ]
+}

docs/opening-1.png

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+{
+  "name": "zipkin-chrome-extension",
+  "version": "1.0.0",
+  "description": "Lets you trigger Zipkin traces from the browser, while using your application",
+  "scripts": {
+    "dev": "node node_modules/webpack/bin/webpack.js --watch",
+    "build": "node build.js"
+  },
+  "author": "OpenZipkin",
+  "license": "Apache 2",
+  "devDependencies": {
+    "babel-core": "^6.7.4",
+    "babel-loader": "^6.2.4",
+    "babel-plugin-transform-object-rest-spread": "^6.6.5",
+    "babel-plugin-transform-react-jsx": "^6.7.4",
+    "babel-preset-es2015": "^6.6.0",
+    "express": "^4.13.4",
+    "extract-text-webpack-plugin": "^1.0.1",
+    "file-loader": "^0.8.5",
+    "jszip": "^2.6.0",
+    "node-zip": "^1.1.1",
+    "webpack": "^1.12.14"
+  },
+  "dependencies": {
+    "minimatch": "^3.0.0",
+    "random-js": "^1.0.8",
+    "react": "^0.14.8",
+    "react-dom": "^0.14.8"
+  }
+}

docs/opening-2.png

@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+<head>
+    <meta charset="utf-8" />
+    <title>Zipkin Chrome Extension</title>
+</head>
+<body>
+<div id="content"></div>
+<script src="dist/panel.bundle.js"></script>
+</body>
+</html>

docs/show-traces.png

@@ -0,0 +1,63 @@
+import Random from 'random-js';
+import makeRequest from './request';
+
+const random = new Random();
+function generateZipkinTraceId() {
+  return random.hex(32);
+}
+
+const filter = {
+  urls: ['*://*/*']
+};
+
+chrome.webRequest.onBeforeSendHeaders.addListener(function(details) {
+  const traceId = generateZipkinTraceId();
+  const zipkinHeaders = {
+    'X-Zipkin-Extension': '1',
+    'X-B3-Flags': '1',
+    'X-B3-TraceId': traceId,
+    'X-B3-SpanId': traceId
+  };
+
+  const modified = {
+    requestHeaders: [
+      ...(details.requestHeaders || []),
+      ...Object.keys(zipkinHeaders).map(key => ({
+        name: key,
+        value: zipkinHeaders[key]
+      }))
+    ]
+  };
+  return modified;
+}, filter, ['blocking', 'requestHeaders']);
+
+chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
+  if (request.type === 'checkZipkinUI') {
+    const fetchUrl = request.zipkinUrl + '/config.json';
+    makeRequest(fetchUrl).then(xhr => {
+      if (xhr.status !== 200) {
+        return Promise.reject({status: 'error ' + xhr.status});
+      } else {
+        const contentType = xhr.getResponseHeader('content-type');
+        if (contentType.indexOf('application/json') === -1) {
+          return Promise.reject({status: 'invalid response type ' + contentType});
+        } else {
+          try {
+            return JSON.parse(xhr.responseText);
+          } catch (parseError) {
+            return Promise.reject({status: 'invalid response (JSON parse error)'});
+          }
+        }
+      }
+    }).then(data => {
+      const r = {instrumented: data.instrumented || ['**']};
+      sendResponse(r);
+    }).catch(err => {
+      const r = {error: err};
+      sendResponse(r);
+    });
+    return true;
+  } else {
+    sendResponse({error: `Invalid message type "${request.type}"`});
+  }
+});

manifest.json

@@ -0,0 +1,6 @@
+const panel = chrome.devtools.panels.create('Zipkin',
+  'zipkin.png',
+  'panel.html',
+  panel => {
+  }
+);

package.json

@@ -0,0 +1,93 @@
+import React, {Component, PropTypes} from 'react';
+import {render} from 'react-dom';
+import minimatch from 'minimatch';
+import ZipkinUI from './zipkinUI';
+
+class ZipkinPanel extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      requests: [],
+      zipkinUrls: []
+    };
+  }
+
+  componentDidMount() {
+    chrome.devtools.network.onNavigated.addListener(() => {
+      this.setState({requests: []});
+    });
+
+    chrome.devtools.network.onRequestFinished.addListener(request => {
+      // alert(JSON.stringify(request.request));
+      const [traceId] = request.request.headers.filter(h => h.name === 'X-B3-TraceId');
+
+      if (traceId) {
+        this.setState({
+          requests: [...this.state.requests, {
+            traceId: traceId.value,
+            url: request.request.url
+          }]
+        });
+      }
+    });
+  }
+
+  matches(url, matcher) {
+    console.log('checking for url '+url+' and matcher '+matcher);
+    const result = minimatch(url, matcher);
+    console.log('was it match?', result);
+    return result;
+  }
+
+  traceLink(traceId, requestUrl) {
+    console.log('matching traceID '+traceId + 'and requestUrl '+requestUrl+' for uis', this.state.zipkinUrls);
+    const url = this.state.zipkinUrls.find(url =>
+      url.instrumented.find(matcher => this.matches(requestUrl, matcher)) != null
+    );
+    if (url == null) {
+      return null;
+    } else {
+      return `${url.name}/traces/${encodeURIComponent(traceId)}`;
+    }
+  }
+
+  handleZipkinUrlsChange(value) {
+    this.setState({
+      zipkinUrls: value
+    });
+  }
+
+  render() {
+    const alignLeft = {textAlign: 'left', verticalAlign: 'top'};
+    return (
+      <div className="container">
+        <div className="row">
+          <div className="col-md-12">
+            <h2>Zipkin traces</h2>
+            <ZipkinUI onZipkinUrlsChange={this.handleZipkinUrlsChange.bind(this)} />
+            <table>
+              <thead>
+              <tr>
+                <th style={alignLeft}>Trace</th>
+                <th style={alignLeft}>Request</th>
+              </tr>
+              </thead>
+              <tbody>
+              {this.state.requests.length > 0 ? this.state.requests.map(request => (
+                  <tr key={request.traceId}>
+                    <td style={alignLeft}><a target="blank" href={this.traceLink(request.traceId, request.url)}>{request.traceId}</a></td>
+                    <td style={alignLeft}>{request.url}</td>
+                  </tr>
+                )
+              ) :
+                <tr><td colSpan="2">Recording network activity... Perform a request or hit F5 to record the reload.</td></tr>}
+              </tbody>
+            </table>
+          </div>
+        </div>
+      </div>
+    );
+  }
+}
+
+render(<ZipkinPanel />, document.getElementById('content'));

panel.html

@@ -0,0 +1,15 @@
+export default function request(url) {
+  return new Promise((resolve, reject) => {
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url, true);
+    xhr.onreadystatechange = function() {
+      if (xhr.readyState == 4) {
+        resolve(xhr);
+      }
+    };
+    xhr.onerror = function(error) {
+      reject(error);
+    };
+    xhr.send();
+  });
+}