prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  download from d.tube fails
  ### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2019.01.02*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
  - [x] I've **verified** and **I assure** that I'm running youtube-dl **2019.01.02**
  
  ### Before submitting an *issue* make sure you have:
  - [x] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
  - [x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones
  - [x] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser
  
  ### What is the purpose of your *issue*?
  - [x] Bug report (encountered problems with youtube-dl)
  - [x] Site support request (request for __re__adding support for an existing site)
  - [ ] Feature request (request for a new functionality)
  - [ ] Question
  - [ ] Other
  
  ### 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** 
  
  ```
  user@mymachine:~$ youtube-dl --verbose
  [debug] System config: []
  [debug] User config: []
  [debug] Custom config: []
  [debug] Command-line args: ['--verbose']
  [debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
  [debug] youtube-dl version 2019.01.02
  [debug] Python version 3.5.3 (CPython) - Linux-4.9.0-4-amd64-x86_64-with-debian-9.2
  [debug] exe versions: none
  [debug] Proxy map: {}
  Usage: youtube-dl [OPTIONS] URL [URL...]
  
  youtube-dl: error: You must provide at least one URL.
  Type youtube-dl --help to see a list of all options.
  user@ mymachine:~$ youtube-dl --verbose "https://d.tube/#!/v/dennisxxx/lgfrcata"
  bash: !/v/dennisxxx/lgfrcata: event not found
  ```
  ### Description of your *issue*, suggested solution and other information
  
  Download from d.tube failed. I am sorry to not being able to provide more information. If I can help/try anything else I will gladly do though....
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `youtube_dl/extractor/dtube.py`
  Content:
  ```
  1 # coding: utf-8
  2 from __future__ import unicode_literals
  3 
  4 import json
  5 import re
  6 from socket import timeout
  7 
  8 from .common import InfoExtractor
  9 from ..utils import (
  10     int_or_none,
  11     parse_iso8601,
  12 )
  13 
  14 
  15 class DTubeIE(InfoExtractor):
  16     _VALID_URL = r'https?://(?:www\.)?d\.tube/(?:#!/)?v/(?P<uploader_id>[0-9a-z.-]+)/(?P<id>[0-9a-z]{8})'
  17     _TEST = {
  18         'url': 'https://d.tube/#!/v/benswann/zqd630em',
  19         'md5': 'a03eaa186618ffa7a3145945543a251e',
  20         'info_dict': {
  21             'id': 'zqd630em',
  22             'ext': 'mp4',
  23             'title': 'Reality Check: FDA\'s Disinformation Campaign on Kratom',
  24             'description': 'md5:700d164e066b87f9eac057949e4227c2',
  25             'uploader_id': 'benswann',
  26             'upload_date': '20180222',
  27             'timestamp': 1519328958,
  28         },
  29         'params': {
  30             'format': '480p',
  31         },
  32     }
  33 
  34     def _real_extract(self, url):
  35         uploader_id, video_id = re.match(self._VALID_URL, url).groups()
  36         result = self._download_json('https://api.steemit.com/', video_id, data=json.dumps({
  37             'jsonrpc': '2.0',
  38             'method': 'get_content',
  39             'params': [uploader_id, video_id],
  40         }).encode())['result']
  41 
  42         metadata = json.loads(result['json_metadata'])
  43         video = metadata['video']
  44         content = video['content']
  45         info = video.get('info', {})
  46         title = info.get('title') or result['title']
  47 
  48         def canonical_url(h):
  49             if not h:
  50                 return None
  51             return 'https://ipfs.io/ipfs/' + h
  52 
  53         formats = []
  54         for q in ('240', '480', '720', '1080', ''):
  55             video_url = canonical_url(content.get('video%shash' % q))
  56             if not video_url:
  57                 continue
  58             format_id = (q + 'p') if q else 'Source'
  59             try:
  60                 self.to_screen('%s: Checking %s video format URL' % (video_id, format_id))
  61                 self._downloader._opener.open(video_url, timeout=5).close()
  62             except timeout:
  63                 self.to_screen(
  64                     '%s: %s URL is invalid, skipping' % (video_id, format_id))
  65                 continue
  66             formats.append({
  67                 'format_id': format_id,
  68                 'url': video_url,
  69                 'height': int_or_none(q),
  70                 'ext': 'mp4',
  71             })
  72 
  73         return {
  74             'id': video_id,
  75             'title': title,
  76             'description': content.get('description'),
  77             'thumbnail': canonical_url(info.get('snaphash')),
  78             'tags': content.get('tags') or metadata.get('tags'),
  79             'duration': info.get('duration'),
  80             'formats': formats,
  81             'timestamp': parse_iso8601(result.get('created')),
  82             'uploader_id': uploader_id,
  83         }
  84
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/youtube_dl/extractor/dtube.py b/youtube_dl/extractor/dtube.py
  --- a/youtube_dl/extractor/dtube.py
  +++ b/youtube_dl/extractor/dtube.py
  @@ -48,7 +48,7 @@
           def canonical_url(h):
               if not h:
                   return None
  -            return 'https://ipfs.io/ipfs/' + h
  +            return 'https://video.dtube.top/ipfs/' + h
   
           formats = []
           for q in ('240', '480', '720', '1080', ''):
  
verification_info: {"golden_diff": "diff --git a/youtube_dl/extractor/dtube.py b/youtube_dl/extractor/dtube.py\n--- a/youtube_dl/extractor/dtube.py\n+++ b/youtube_dl/extractor/dtube.py\n@@ -48,7 +48,7 @@\n         def canonical_url(h):\n             if not h:\n                 return None\n-            return 'https://ipfs.io/ipfs/' + h\n+            return 'https://video.dtube.top/ipfs/' + h\n \n         formats = []\n         for q in ('240', '480', '720', '1080', ''):\n", "issue": "download from d.tube fails\n### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2019.01.02*. If it's not, read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.\r\n- [x] I've **verified** and **I assure** that I'm running youtube-dl **2019.01.02**\r\n\r\n### Before submitting an *issue* make sure you have:\r\n- [x] At least skimmed through the [README](https://github.com/rg3/youtube-dl/blob/master/README.md), **most notably** the [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections\r\n- [x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones\r\n- [x] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser\r\n\r\n### What is the purpose of your *issue*?\r\n- [x] Bug report (encountered problems with youtube-dl)\r\n- [x] Site support request (request for __re__adding support for an existing site)\r\n- [ ] Feature request (request for a new functionality)\r\n- [ ] Question\r\n- [ ] Other\r\n\r\n### 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:\r\n\r\nAdd the `-v` flag to **your command line** \r\n\r\n```\r\nuser@mymachine:~$ youtube-dl --verbose\r\n[debug] System config: []\r\n[debug] User config: []\r\n[debug] Custom config: []\r\n[debug] Command-line args: ['--verbose']\r\n[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8\r\n[debug] youtube-dl version 2019.01.02\r\n[debug] Python version 3.5.3 (CPython) - Linux-4.9.0-4-amd64-x86_64-with-debian-9.2\r\n[debug] exe versions: none\r\n[debug] Proxy map: {}\r\nUsage: youtube-dl [OPTIONS] URL [URL...]\r\n\r\nyoutube-dl: error: You must provide at least one URL.\r\nType youtube-dl --help to see a list of all options.\r\nuser@ mymachine:~$ youtube-dl --verbose \"https://d.tube/#!/v/dennisxxx/lgfrcata\"\r\nbash: !/v/dennisxxx/lgfrcata: event not found\r\n```\r\n### Description of your *issue*, suggested solution and other information\r\n\r\nDownload from d.tube failed. I am sorry to not being able to provide more information. If I can help/try anything else I will gladly do though....\n", "before_files": [{"content": "# coding: utf-8\nfrom __future__ import unicode_literals\n\nimport json\nimport re\nfrom socket import timeout\n\nfrom .common import InfoExtractor\nfrom ..utils import (\n    int_or_none,\n    parse_iso8601,\n)\n\n\nclass DTubeIE(InfoExtractor):\n    _VALID_URL = r'https?://(?:www\\.)?d\\.tube/(?:#!/)?v/(?P<uploader_id>[0-9a-z.-]+)/(?P<id>[0-9a-z]{8})'\n    _TEST = {\n        'url': 'https://d.tube/#!/v/benswann/zqd630em',\n        'md5': 'a03eaa186618ffa7a3145945543a251e',\n        'info_dict': {\n            'id': 'zqd630em',\n            'ext': 'mp4',\n            'title': 'Reality Check: FDA\\'s Disinformation Campaign on Kratom',\n            'description': 'md5:700d164e066b87f9eac057949e4227c2',\n            'uploader_id': 'benswann',\n            'upload_date': '20180222',\n            'timestamp': 1519328958,\n        },\n        'params': {\n            'format': '480p',\n        },\n    }\n\n    def _real_extract(self, url):\n        uploader_id, video_id = re.match(self._VALID_URL, url).groups()\n        result = self._download_json('https://api.steemit.com/', video_id, data=json.dumps({\n            'jsonrpc': '2.0',\n            'method': 'get_content',\n            'params': [uploader_id, video_id],\n        }).encode())['result']\n\n        metadata = json.loads(result['json_metadata'])\n        video = metadata['video']\n        content = video['content']\n        info = video.get('info', {})\n        title = info.get('title') or result['title']\n\n        def canonical_url(h):\n            if not h:\n                return None\n            return 'https://ipfs.io/ipfs/' + h\n\n        formats = []\n        for q in ('240', '480', '720', '1080', ''):\n            video_url = canonical_url(content.get('video%shash' % q))\n            if not video_url:\n                continue\n            format_id = (q + 'p') if q else 'Source'\n            try:\n                self.to_screen('%s: Checking %s video format URL' % (video_id, format_id))\n                self._downloader._opener.open(video_url, timeout=5).close()\n            except timeout:\n                self.to_screen(\n                    '%s: %s URL is invalid, skipping' % (video_id, format_id))\n                continue\n            formats.append({\n                'format_id': format_id,\n                'url': video_url,\n                'height': int_or_none(q),\n                'ext': 'mp4',\n            })\n\n        return {\n            'id': video_id,\n            'title': title,\n            'description': content.get('description'),\n            'thumbnail': canonical_url(info.get('snaphash')),\n            'tags': content.get('tags') or metadata.get('tags'),\n            'duration': info.get('duration'),\n            'formats': formats,\n            'timestamp': parse_iso8601(result.get('created')),\n            'uploader_id': uploader_id,\n        }\n", "path": "youtube_dl/extractor/dtube.py"}], "after_files": [{"content": "# coding: utf-8\nfrom __future__ import unicode_literals\n\nimport json\nimport re\nfrom socket import timeout\n\nfrom .common import InfoExtractor\nfrom ..utils import (\n    int_or_none,\n    parse_iso8601,\n)\n\n\nclass DTubeIE(InfoExtractor):\n    _VALID_URL = r'https?://(?:www\\.)?d\\.tube/(?:#!/)?v/(?P<uploader_id>[0-9a-z.-]+)/(?P<id>[0-9a-z]{8})'\n    _TEST = {\n        'url': 'https://d.tube/#!/v/benswann/zqd630em',\n        'md5': 'a03eaa186618ffa7a3145945543a251e',\n        'info_dict': {\n            'id': 'zqd630em',\n            'ext': 'mp4',\n            'title': 'Reality Check: FDA\\'s Disinformation Campaign on Kratom',\n            'description': 'md5:700d164e066b87f9eac057949e4227c2',\n            'uploader_id': 'benswann',\n            'upload_date': '20180222',\n            'timestamp': 1519328958,\n        },\n        'params': {\n            'format': '480p',\n        },\n    }\n\n    def _real_extract(self, url):\n        uploader_id, video_id = re.match(self._VALID_URL, url).groups()\n        result = self._download_json('https://api.steemit.com/', video_id, data=json.dumps({\n            'jsonrpc': '2.0',\n            'method': 'get_content',\n            'params': [uploader_id, video_id],\n        }).encode())['result']\n\n        metadata = json.loads(result['json_metadata'])\n        video = metadata['video']\n        content = video['content']\n        info = video.get('info', {})\n        title = info.get('title') or result['title']\n\n        def canonical_url(h):\n            if not h:\n                return None\n            return 'https://video.dtube.top/ipfs/' + h\n\n        formats = []\n        for q in ('240', '480', '720', '1080', ''):\n            video_url = canonical_url(content.get('video%shash' % q))\n            if not video_url:\n                continue\n            format_id = (q + 'p') if q else 'Source'\n            try:\n                self.to_screen('%s: Checking %s video format URL' % (video_id, format_id))\n                self._downloader._opener.open(video_url, timeout=5).close()\n            except timeout:\n                self.to_screen(\n                    '%s: %s URL is invalid, skipping' % (video_id, format_id))\n                continue\n            formats.append({\n                'format_id': format_id,\n                'url': video_url,\n                'height': int_or_none(q),\n                'ext': 'mp4',\n            })\n\n        return {\n            'id': video_id,\n            'title': title,\n            'description': content.get('description'),\n            'thumbnail': canonical_url(info.get('snaphash')),\n            'tags': content.get('tags') or metadata.get('tags'),\n            'duration': info.get('duration'),\n            'formats': formats,\n            'timestamp': parse_iso8601(result.get('created')),\n            'uploader_id': uploader_id,\n        }\n", "path": "youtube_dl/extractor/dtube.py"}]}