Repository: youtube-dl
Issue: [bilibili] Unable to download JSON metadata: HTTP Error 502: Bad Gateway (caused by HTTPError())
Labels: broken-IE

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## Checklist

<!--
Carefully read and work through this check list in order to prevent the most common mistakes and misuse of youtube-dl:
- First of, make sure you are using the latest version of youtube-dl. Run `youtube-dl --version` and ensure your version is 2021.12.17. If it's not, see https://yt-dl.org/update on how to update. Issues with outdated version will be REJECTED.
- Make sure that all provided video/audio/playlist URLs (if any) are alive and playable in a browser.
- Make sure that all URLs and arguments with special characters are properly quoted or escaped as explained in http://yt-dl.org/escape.
- Search the bugtracker for similar issues: http://yt-dl.org/search-issues. DO NOT post duplicates.
- Finally, put x into all relevant boxes (like this [x])
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- [x] I'm reporting a broken site support
- [x] I've verified that I'm running youtube-dl version ~~**2021.12.17**~~ 2023.08.07, 2024.02.03
- [x] I've checked that all provided URLs are alive and playable in a browser
- [x] I've checked that all URLs and arguments with special characters are properly quoted or escaped
- [x] I've searched the bugtracker for similar issues including closed ones


## Verbose log

<!--
Provide the complete verbose output of youtube-dl that clearly demonstrates the problem.
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 below. It should look similar to this:
 [debug] System config: []
 [debug] User config: []
 [debug] Command-line args: [u'-v', u'http://www.youtube.com/watch?v=BaW_jenozKcj']
 [debug] Encodings: locale cp1251, fs mbcs, out cp866, pref cp1251
 [debug] youtube-dl version 2021.12.17
 [debug] Python version 2.7.11 - Windows-2003Server-5.2.3790-SP2
 [debug] exe versions: ffmpeg N-75573-g1d0487f, ffprobe N-75573-g1d0487f, rtmpdump 2.4
 [debug] Proxy map: {}
 <more lines>
-->

```
youtube-dl --verbose https://www.bilibili.com/video/BV1Ac411v7a8
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.bilibili.com/video/BV1Ac411v7a8']
[debug] Encodings: locale cp936, fs mbcs, out cp936, pref cp936
[debug] youtube-dl version 2024.02.03 [4416f82c8] (single file build)
[debug] ** This version was built from the latest master code at https://github.com/ytdl-org/youtube-dl.
[debug] ** For support, visit the main site.
[debug] Python 3.4.4 (CPython AMD64 32bit) - Windows-10-10.0.22000 - OpenSSL 1.0.2d 9 Jul 2015
[debug] exe versions: ffmpeg 2022-12-19-git-48d5aecfc4-full_build-www.gyan.dev, ffprobe 2022-12-19-git-48d5aecfc4-full_build-www.gyan.dev
[debug] Proxy map: {}
[BiliBili] 1Ac411v7a8: Downloading webpage
[BiliBili] 1Ac411v7a8: Downloading video info page
WARNING: Unable to download JSON metadata: HTTP Error 502: Bad Gateway
[BiliBili] 1Ac411v7a8: Downloading video info page
ERROR: Unable to download JSON metadata: HTTP Error 502: Bad Gateway (caused by HTTPError()); 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 "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\common.py", line 678, in _request_webpage
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 2465, in urlopen
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 470, in open
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 580, in http_response
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 502, in error
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 442, in _call_chain
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 685, in http_error_302
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 470, in open
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 580, in http_response
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 508, in error
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 442, in _call_chain
  File "C:\hostedtoolcache\windows\Python\3.4.4\x86\lib\urllib\request.py", line 588, in http_error_default

```


## Description

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The error is the same with version 2023.08.07, 2024.02.03, both without and with a proxy. I tried several videos but all with the same error.