coursera-dl quits on Windows

[mugenishere]

🚨Please review the Troubleshooting section
before reporting any issue. Don't forget to check also the current issues to
avoid duplicates.

Subject of the issue

I've already set HTTP_PROXY and HTTPS_PROXY fields.
The coursera-dl quits with the error "A connection attempt failed because the connected party did not properly respond after a period of time". It seems like it quits after logging in.

Your environment

• Operating System (name/version): Windows 10
• Python version: 3.6.2
• coursera-dl version: 0.9.0

Steps to reproduce

1. I'm trying to get a course and my internet is behind a proxy. So I've set the HTTP_PROXY and HTTPS_PROXY to the correct address (under Windows System settings> Env variables> global variables).

2. This works fine - pip install - works fine. So I think Python is able to use the env variables.

3. Try to run the command like this "D:\Share\course>coursera-dl -u <valid username> -p <valid password> python-data-analysis"

This leads to the error.

• Is the problem happening with the latest version of the script?
  Yes, I installed the package yesterday.

• Do you have all the recommended versions of the modules? See them in the
  file requirements.txt.
  Yes. I used PIP to verify that all the modules are the correct versions

• What is the course that you are trying to access?
  python-data-analysis

• What is the precise command line that you are using (don't forget to obfuscate
  your username and password, but leave all other information untouched).

coursera-dl -u <valid username> -p <valid password> python-data-analysis

• What are the precise messages that you get? Please, use the --debug
  option before posting the messages as a bug report. Please, copy and paste
  them. Don't reword/paraphrase the messages.
  (I've posted the full trace below)

Expected behaviour

It should login to coursera and start downloading my course. I can access it online.
I'm able to stream the course with my account just fine using the browser. I just want to download the videos so that I can watch them at home later on.

Actual behaviour

It hangs for a long time and then prints the traceback. Here's are the complete logs with debug mode.

`root[main] coursera_dl version 0.9.0
root[main] Downloading class: python-data-analysis (1 / 1)
root[download_class] Downloading new style (on demand) class python-data-analysis
root[login] Initiating login.
root[login] There were no .coursera.org cookies to be cleared.
root[prepape_auth_headers] Forging cookie header: csrftoken=tpdpR5F7MpxfiwNY3jSE; csrf2_token_20oiXFWp=QXvjexsU6bg7MaNi4OxwLpwQ.
urllib3.connectionpool[_new_conn] Starting new HTTPS connection (1): www.coursera.org
urllib3.connectionpool[_make_request] https://www.coursera.org:443 "POST /api/login/v3 HTTP/1.1" 200 None
root[login] Logged in on coursera.org.
urllib3.connectionpool[_new_conn] Starting new HTTPS connection (1): www.coursera.org
Traceback (most recent call last):
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connection.py", line 141, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\util\connection.py", line 83, in create_connection
raise err
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\util\connection.py", line 73, in create_connection
sock.connect(sa)
TimeoutError: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen
chunked=chunked)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connectionpool.py", line 346, in _make_request
self._validate_conn(conn)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connectionpool.py", line 850, in _validate_conn
conn.connect()
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connection.py", line 284, in connect
conn = self._new_conn()
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connection.py", line 150, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x03E61530>: Failed to establish a new connection: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\requests\adapters.py", line 440, in send
timeout=timeout
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\connectionpool.py", line 639, in urlopen
_stacktrace=sys.exc_info()[2])
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\urllib3\util\retry.py", line 388, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='www.coursera.org', port=443): Max retries exceeded with url: /api/opencourse.v1/course/python-data-analysis?showLockedItems=true (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x03E61530>: Failed to establish a new connection: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond',))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\mugen\AppData\Local\Programs\Python\Python36-32\Scripts\coursera-dl-script.py", line 11, in
load_entry_point('coursera-dl==0.9.0', 'console_scripts', 'coursera-dl')()
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\coursera_dl.py", line 237, in main
error_occured, completed = download_class(args, class_name)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\coursera_dl.py", line 212, in download_class
return download_on_demand_class(args, class_name)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\coursera_dl.py", line 139, in download_on_demand_class
args.mathjax_cdn_url
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\extractors.py", line 52, in get_modules
page = self._get_on_demand_syllabus(class_name)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\extractors.py", line 65, in _get_on_demand_syllabus
page = get_page(self._session, url)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\network.py", line 85, in get_page
reply = get_reply(session, url, post=post, data=data, headers=headers)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\coursera\network.py", line 44, in get_reply
reply = session.send(prepared_request)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\requests\sessions.py", line 618, in send
r = adapter.send(request, **kwargs)
File "c:\users\mugen\appdata\local\programs\python\python36-32\lib\site-packages\requests\adapters.py", line 508, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='www.coursera.org', port=443): Max retries exceeded with url: /api/opencourse.v1/course/python-data-analysis?showLockedItems=true (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x03E61530>: Failed to establish a new connection: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond',))`

[mugenishere]

I just tested this in a direct connection. It seems it has nothing to do with the proxy settings. Even with a direct connection it's showing the same error.

[wenxingxing]

If you're from china, check this.

[balta2ar]

Are you still having issues? This looks like a connection problem, there is little we can do from our side. Resolving. Ping back if you still have issues.