Gfycat cajax json endpoint is gone

[crccheck]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.11.23. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2018.11.23

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

$ youtube-dl https://gfycat.com/belovedsparseamericanbobtail -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['https://gfycat.com/belovedsparseamericanbobtail', '-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.11.23
[debug] Python version 3.6.5 (CPython) - Darwin-16.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.2.2, ffprobe 3.2.2
[debug] Proxy map: {}
[Gfycat] belovedsparseamericanbobtail: Downloading video info
ERROR: Unable to download JSON metadata: HTTP Error 404: Not Found (caused by <HTTPError 404: 'Not Found'>); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 605, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2211, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 532, in open
    response = meth(req, response)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 642, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 564, in error
    result = self._call_chain(*args)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 756, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 532, in open
    response = meth(req, response)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 642, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 570, in error
    return self._call_chain(*args)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 650, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)

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Description of your issue, suggested solution and other information

Gfycat downloads no longer work because Gfycat removed the API youtube-dl uses:

Yes we announced deprecation of this endpoint 1.5 years ago. Are you using it for an app still?

This is the link to our current API. https://developers.gfycat.com/api/#introduction
https://www.reddit.com/r/gfycat/comments/a17ewc/embeded_gfycats_returning_failed_to_load_resource/eanbmrh/

So if you wanted to get https://gfycat.com/belovedsparseamericanbobtail then youtube-dl would look for the meta at https://gfycat.com/cajax/get/belovedsparseamericanbobtail (you can try the link, it'll 404).
https://github.com/rg3/youtube-dl/blob/d9df8f120b325766181fb474a8c534e51df78f17/youtube_dl/extractor/gfycat.py#L55-L57

It's not obvious how to me how to fix this because the new api uses an oauth2 bearer token, and there isn't a key store AFAIK built into youtube-dl. The closest thing looks like the .netrc file support, or possibly a custom config file entry

[Hrxn]

So instead of this:

https://github.com/rg3/youtube-dl/blob/d9df8f120b325766181fb474a8c534e51df78f17/youtube_dl/extractor/gfycat.py#L55-L57

I think something like this should work, maybe. There is another endpoint as well if not, as far as I know.

  gfy = self._download_json(
        'https://api.gfycat.com/v1/gfycats/%s' % video_id,
        video_id, 'Downloading video info')

[crccheck]

oh nice, that looks like the same response, and no oauth2 required!