Access forbidden error for the website http://www.acfun.tv

[arealdeadone]

I was trying to add an extractor for the the website http://www.acfun.tv so while running the tests the following output was generated

D:\Arvind Rachuri\Code\Open Source\youtube-dl>python -m youtube_dl http://acfun.tv/v/ac2876205 -v
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['http://acfun.tv/v/ac2876205', '-v']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2016.07.07
[debug] Git HEAD: 29c4a07
[debug] Python version 3.4.4 - Windows-7-6.1.7600-SP0
[debug] exe versions: none
[debug] Proxy map: {}
[generic] ac2876205: Requesting header
[redirect] Following redirect to http://www.acfun.tv/v/ac2876205
[generic] ac2876205: Requesting header
WARNING: Could not send HEAD request to http://www.acfun.tv/v/ac2876205: HTTP Error 403: Forbidden
[generic] ac2876205: Downloading webpage
WARNING: Falling back on generic information extractor.
[generic] ac2876205: Extracting information
ERROR: Unsupported URL: http://www.acfun.tv/v/ac2876205
Traceback (most recent call last):
  File "D:\Arvind Rachuri\Code\Open Source\youtube-dl\youtube_dl\YoutubeDL.py", line 681, in extract_info
    ie_result = ie.extract(url)
  File "D:\Arvind Rachuri\Code\Open Source\youtube-dl\youtube_dl\extractor\common.py", line 343, in extract
    return self._real_extract(url)
  File "D:\Arvind Rachuri\Code\Open Source\youtube-dl\youtube_dl\extractor\generic.py", line 2237, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: http://www.acfun.tv/v/ac2876205

My Python extractor code:

from .common import InfoExtractor

from re import match

class AcfunIE(InfoExtractor):
    _VALID_URL = r'(?:https?://)?(?:www\.)?acfun\.tv/v/(?P<id>\w+)'
    _TEST = {
        u'url': u'http://www.acfun.tv/v/ac2876205',
        u'file': u'2876205.mp4',
        u'info_dict': {
            u"id": u"2876205",
            u"ext": u"mp4",
            u"title": u"坐稳了，别跳起来！盘点电影中那些吓人的片段！."
        }
    }

    def _real_extract(self, url):
        mobj = match(self._VALID_URL)

        video_id = mobj.group('id')
        webpage_url = 'https://acfun.tv/v/'+video_id
        webpage = self._download_webpage(webpage_url,video_id)

        self.report_extraction(video_id)
        video_url = self._html_search_regex(r'<iframe id="ACFlashPlayer-re" frameborder="0" allowfullscreen="" style="height: 592px; width: 980px; left: 0px; top: 0px;" src="(.+?)">',webpage, u'video URL')

        return {
            'id': video_id,
            'url': video_url,
            'ext': 'mp4',
            'title': self._html_search_regex(r'<h1 id="txt-title-view">(.+?)</h1>',webpage,u'Title')
        }

Why is this warning is being generated?

WARNING: Could not send HEAD request to http://www.acfun.tv/v/ac2876205: HTTP Error 403: Forbidden

Please help

[dstftw]

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