error [SSL: CERTIFICATE_VERIFY_FAILED] - Python 2.7.9

[kovitimi]

Using Pyhton 2.7.9 on Windows7 after using the following command:

coursera-dl -u xxx@yyy.zzz -p XXX -d C:\Coursera algs4partI-007

I receive the following error message:

- Downloading  https://class.coursera.org/algs4partI-007/lecture/download.mp4?lecture_id=62 None
- failed:  https://class.coursera.org/algs4partI-007/lecture/download.mp4?lecture_id=62 <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)>

I tried with different courses, and the other files except for the videos do download, but neither of the videos does.

I am new to using Python, so I would be really grateful if you could walk me through the solution step-by-step.

Thank you

[macedd]

Got something similar: handshake failure

Coursera-dl v3.1.1 (html.parser)
Logging in as 'thiago@internetbudi.com.br'...
Traceback (most recent call last):
  File "/usr/local/bin/coursera-dl", line 9, in <module>
    load_entry_point('coursera-dl==3.1.1', 'console_scripts', 'coursera-dl')()
  File "/usr/local/lib/python2.7/dist-packages/courseradownloader/courseradownloader.py", line 648, in main
    d.login(args.course_names[0])
  File "/usr/local/lib/python2.7/dist-packages/courseradownloader/courseradownloader.py", line 133, in login
    res = opener.open(req)
  File "/usr/lib/python2.7/urllib2.py", line 410, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 523, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 442, in error
    result = self._call_chain(*args)

...

  File "/usr/lib/python2.7/urllib2.py", line 629, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1222, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>

And here is how the request looked like

{
    '_Request__r_type': '//www.coursera.org/login?course_id=974076&r=https%3A%2F%2Fclass.coursera.org%2Fdesignbiz-002%2Flecture&user_action=class&topic_name=Design%20Thinking%20for%20Business%20Innovation',
    '_Request__original': 'https: //www.coursera.org/login?course_id=974076&r=https%3A%2F%2Fclass.coursera.org%2Fdesignbiz-002%2Flecture&user_action=class&topic_name=Design%20Thinking%20for%20Business%20Innovation',
    'data': None,
    '_tunnel_host': None,
    'host': 'www.coursera.org',
    'origin_req_host': 'class.coursera.org',
    'headers': {

    },
    '_Request__fragment': None,
    'timeout': <objectobjectat0x7feb545070a0>,
    '_Request__r_host': '/login?course_id=974076&r=https%3A%2F%2Fclass.coursera.org%2Fdesignbiz-002%2Flecture&user_action=class&topic_name=Design%20Thinking%20for%20Business%20Innovation',
    'unredirected_hdrs': {
        'Host': 'www.coursera.org',
        'Cookie': '__204u=123XYZ',
        'User-agent': 'Python-urllib/2.7'
    },
    'unverifiable': True,
    'type': 'https',
    'port': None,
    'redirect_dict': {
        'https: //class.coursera.org/designbiz-002/lecture': 1,
        'https: //www.coursera.org/login?course_id=974076&r=https%3A%2F%2Fclass.coursera.org%2Fdesignbiz-002%2Flecture&user_action=class&topic_name=Design%20Thinking%20for%20Business%20Innovation': 1
    }
}

[danmbox]

urllib2.URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure> here on mechanize branch

[david-solis]

I had this issue on OS X 10.10.2, Python 2.7.6 and OpenSSL 0.9.8zc, coursera-dl version 2.0.2.

I fixed this handshaking issue by:

1. Installing a new OpenSSL version - 1.0.2a 19 Mar 2015
2. Compiling and installing the cryptography package linked against the new OpenSSL version
3. Installing requests package with SNI support

Reference:
OpenSSL 1.0.1 Branch Release notes

• Add TLS padding extension workaround for broken servers

[danmbox]

@david-solis, are you on the mechanize branch or the requests branch? I think the official one is mechanize (since there were download problems with requests)

[ICodeEverything]

On windows, I was able to fix this by upgrading to Python 2.7.9, which has ssl3 disabled for POODLE.

[danmbox]

Hm... Running python 2.7.9 (from Ubuntu Vivid via Docker) fixes the problem under Linux

[roncanepa]

upgrading to 2.7.9 fixed the issue on OSX 10.10, too.

[poluekt]

it also works for win7.

 On Sunday, April 5, 2015 3:13 PM, roncanepa <notifications@github.com> wrote:

upgrading to 2.7.9 fixed the issue on OSX 10.10, too. —
Reply to this email directly or view it on GitHub.

[kvsriram9]

Hi
How to upgrade to Python2.7.9 on Ubuntu 14.04? Is it a simple download of Python2.7.9.tgz, then extract, ./configure, make and make install? Any other care that needs to be taken care off?

Sorry for the silly question, I am a novice in both Ubuntu and Python!

[rubenve]

Upgrading to Python 2.7.9 on my Yosemite system didn't fix it for me. I've also upgraded OpenSSL to 1.0.2a and installed the Cryptography package, but still no dice. Any ideas?

Rubens-MacBook-Pro:Coursera Lectures ruben$ python -V
Python 2.7.9

Rubens-MacBook-Pro:Coursera Lectures ruben$ openssl version -a
OpenSSL 1.0.2a 19 Mar 2015
built on: reproducible build, date unspecified
platform: darwin64-x86_64-cc
options: bn(64,64) rc4(ptr,int) des(idx,cisc,16,int) idea(int) blowfish(idx)
compiler: clang -I. -I.. -I../include -fPIC -fno-common -DOPENSSL_PIC -DZLIB_SHARED -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -arch x86_64 -O3 -DL_ENDIAN -Wall -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM -DECP_NISTZ256_ASM
OPENSSLDIR: "/usr/local/etc/openssl"

[danmbox]

vagrant up ubuntu-15.04?

[roncanepa]

Here's my info, @rubenve , in case it helps.

OSX 10.10.2
OSX command line tools 6.2 (haven't updated to 6.3 yet)

 openssl version -a
OpenSSL 0.9.8zc 15 Oct 2014
built on: Nov 12 2014
platform: darwin64-x86_64-llvm
options:  bn(64,64) md2(int) rc4(ptr,char) des(idx,cisc,16,int) blowfish(idx)
compiler: -arch x86_64 -fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -fasm-blocks -O3 -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DMD32_REG_T=int -DOPENSSL_NO_IDEA -DOPENSSL_PIC -DOPENSSL_THREADS -DZLIB -mmacosx-version-min=10.6
OPENSSLDIR: "/System/Library/OpenSSL"

python --version
Python 2.7.9

I installed python through homebrew, so maybe that had something to do with it:

brew info python
python: stable 2.7.9 (bottled), HEAD
https://www.python.org
/usr/local/Cellar/python/2.7.9 (4863 files, 79M) *
  Poured from bottle
From: https://github.com/Homebrew/homebrew/blob/master/Library/Formula/python.rb
==> Dependencies
Build: pkg-config ✔
Required: openssl ✔
Recommended: readline ✔, sqlite ✘, gdbm ✔

(homebrew installed openssl 1.0.2a-1, as well, but openssl version -a gives OpenSSL 0.9.8zc 15 Oct 2014)

I run everything in virtualenvs, but here are my versions of coursera-dl dependencies:

pip freeze
beautifulsoup4==4.3.2
coursera-dl==3.1.1
mechanize==0.2.5
requests==2.3.0
six==1.7.3

Hopefully something in here will help.

[rubenve]

@danmbox I could do that, but I prefer getting it to work natively.

@roncanepa Thanks! That did end up helping me. I've just unstalled python 2.7 that shipped with OSX. Then install python 2.7.9 through homebrew. I then reverted my openssl version back to 0.9.8zf, reinstalled coursera-dl and then it worked. Much appreciated!