[kuwo] New extractor for kuwo.cn
diff --git a/youtube_dl/extractor/__init__.py b/youtube_dl/extractor/__init__.py
index 6fdaf90b2d6..a348b307720 100644
--- a/youtube_dl/extractor/__init__.py
+++ b/youtube_dl/extractor/__init__.py
@@ -257,6 +257,14 @@
 from .kontrtube import KontrTubeIE
 from .krasview import KrasViewIE
 from .ku6 import Ku6IE
+from .kuwo import (
+    KuwoIE,
+    KuwoAlbumIE,
+    KuwoChartIE,
+    KuwoSingerIE,
+    KuwoCategoryIE,
+    KuwoMvIE,
+)
 from .la7 import LA7IE
 from .laola1tv import Laola1TvIE
 from .letv import (
diff --git a/youtube_dl/extractor/kuwo.py b/youtube_dl/extractor/kuwo.py
new file mode 100644
index 00000000000..82d5f3f9505
--- /dev/null
+++ b/youtube_dl/extractor/kuwo.py
@@ -0,0 +1,307 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import re
+import itertools
+
+from .common import InfoExtractor
+from ..utils import (
+    get_element_by_id,
+    clean_html,
+    ExtractorError,
+)
+
+
+class KuwoIE(InfoExtractor):
+    IE_NAME = 'kuwo:song'
+    _VALID_URL = r'http://www\.kuwo\.cn/yinyue/(?P<id>[0-9]+?)/'
+    _TESTS = [{
+        'url': 'http://www.kuwo.cn/yinyue/635632/',
+        'info_dict': {
+            'id': '635632',
+            'ext': 'ape',
+            'title': '爱我别走',
+            'creator': '张震岳',
+            'upload_date': '20080122',
+            'description': 'md5:ed13f58e3c3bf3f7fd9fbc4e5a7aa75c'
+        },
+    }, {
+        'url': 'http://www.kuwo.cn/yinyue/6446136/',
+        'info_dict': {
+            'id': '6446136',
+            'ext': 'mp3',
+            'title': '心',
+            'creator': 'IU',
+            'upload_date': '20150518',
+        },
+        'params': {
+            'format': 'mp3-320'
+        },
+    }]
+    _FORMATS = [
+        {'format': 'ape', 'ext': 'ape', 'preference': 100},
+        {'format': 'mp3-320', 'ext': 'mp3', 'br': '320kmp3', 'abr': 320, 'preference': 80},
+        {'format': 'mp3-192', 'ext': 'mp3', 'br': '192kmp3', 'abr': 192, 'preference': 70},
+        {'format': 'mp3-128', 'ext': 'mp3', 'br': '128kmp3', 'abr': 128, 'preference': 60},
+        {'format': 'wma', 'ext': 'wma', 'preference': 20},
+        {'format': 'aac', 'ext': 'aac', 'abr': 48, 'preference': 10}
+    ]
+
+    def _get_formats(self, song_id):
+        formats = []
+        for file_format in self._FORMATS:
+            song_url = self._download_webpage(
+                "http://antiserver.kuwo.cn/anti.s?format=%s&br=%s&rid=MUSIC_%s&type=convert_url&response=url" %
+                (file_format['ext'], file_format.get('br', ''), song_id),
+                song_id, note="Download %s url info" % file_format["format"],
+            )
+            if song_url.startswith('http://') or song_url.startswith('https://'):
+                formats.append({
+                    'url': song_url,
+                    'format_id': file_format['format'],
+                    'format': file_format['format'],
+                    'preference': file_format['preference'],
+                    'abr': file_format.get('abr'),
+                })
+        self._sort_formats(formats)
+        return formats
+
+    def _real_extract(self, url):
+        song_id = self._match_id(url)
+        webpage = self._download_webpage(
+            url, song_id, note='Download song detail info',
+            errnote='Unable to get song detail info')
+
+        song_name = self._html_search_regex(
+            r'<h1 title="(.+?)">', webpage, 'song name')
+        singer_name = self._html_search_regex(
+            r'<div class="s_img">.+?title="(.+?)".+?</div>', webpage, 'singer name',
+            flags=re.DOTALL, default=None)
+        lrc_content = clean_html(get_element_by_id("lrcContent", webpage))
+        if lrc_content == '暂无':     # indicates no lyrics
+            lrc_content = None
+
+        formats = self._get_formats(song_id)
+
+        album_id = self._html_search_regex(
+            r'<p class="album" title=".+?">.+?<a href="http://www\.kuwo\.cn/album/([0-9]+)/" ',
+            webpage, 'album id', default=None, fatal=False)
+
+        publish_time = None
+        if album_id is not None:
+            album_info_page = self._download_webpage(
+                "http://www.kuwo.cn/album/%s/" % album_id, song_id,
+                note='Download album detail info',
+                errnote='Unable to get album detail info')
+
+            publish_time = self._html_search_regex(
+                r'发行时间：(\d{4}-\d{2}-\d{2})', album_info_page,
+                'publish time', default=None)
+            if publish_time:
+                publish_time = publish_time.replace('-', '')
+
+        return {
+            'id': song_id,
+            'title': song_name,
+            'creator': singer_name,
+            'upload_date': publish_time,
+            'description': lrc_content,
+            'formats': formats,
+        }
+
+
+class KuwoAlbumIE(InfoExtractor):
+    IE_NAME = 'kuwo:album'
+    _VALID_URL = r'http://www\.kuwo\.cn/album/(?P<id>[0-9]+?)/'
+    _TEST = {
+        'url': 'http://www.kuwo.cn/album/502294/',
+        'info_dict': {
+            'id': '502294',
+            'title': 'M',
+            'description': 'md5:6a7235a84cc6400ec3b38a7bdaf1d60c',
+        },
+        'playlist_count': 2,
+    }
+
+    def _real_extract(self, url):
+        album_id = self._match_id(url)
+
+        webpage = self._download_webpage(
+            url, album_id, note='Download album info',
+            errnote='Unable to get album info')
+
+        album_name = self._html_search_regex(
+            r'<div class="comm".+?<h1 title="(.+?)">.+?</h1>', webpage,
+            'album name', flags=re.DOTALL)
+        album_intro = clean_html(
+            re.sub(r'^.+简介：', '', get_element_by_id("intro", webpage).strip()))
+
+        entries = [
+            self.url_result("http://www.kuwo.cn/yinyue/%s/" % song_id, 'Kuwo', song_id)
+            for song_id in re.findall(
+                r'<p class="listen"><a href="http://www\.kuwo\.cn/yinyue/([0-9]+)/" target="_blank" title="试听.*?"></a></p>',
+                webpage)
+        ]
+        return self.playlist_result(entries, album_id, album_name, album_intro)
+
+
+class KuwoChartIE(InfoExtractor):
+    IE_NAME = 'kuwo:chart'
+    _VALID_URL = r'http://yinyue\.kuwo\.cn/billboard_(?P<id>.+?).htm'
+    _TEST = {
+        'url': 'http://yinyue.kuwo.cn/billboard_香港中文龙虎榜.htm',
+        'info_dict': {
+            'id': '香港中文龙虎榜',
+            'title': '香港中文龙虎榜',
+            'description': 're:[0-9]{4}第[0-9]{2}期',
+        },
+        'playlist_mincount': 10,
+    }
+
+    def _real_extract(self, url):
+        chart_id = self._match_id(url)
+        webpage = self._download_webpage(
+            url, chart_id, note='Download chart info',
+            errnote='Unable to get chart info')
+
+        chart_name = self._html_search_regex(
+            r'<h1 class="unDis">(.+?)</h1>', webpage, 'chart name')
+
+        chart_desc = self._html_search_regex(
+            r'<p class="tabDef">([0-9]{4}第[0-9]{2}期)</p>', webpage, 'chart desc')
+
+        entries = [
+            self.url_result("http://www.kuwo.cn/yinyue/%s/" % song_id, 'Kuwo', song_id)
+            for song_id in re.findall(
+                r'<a href="http://www\.kuwo\.cn/yinyue/([0-9]+)/" .+?>.+?</a>', webpage)
+        ]
+        return self.playlist_result(entries, chart_id, chart_name, chart_desc)
+
+
+class KuwoSingerIE(InfoExtractor):
+    IE_NAME = 'kuwo:singer'
+    _VALID_URL = r'http://www\.kuwo\.cn/mingxing/(?P<id>[^/]+)'
+    _TESTS = [{
+        'url': 'http://www.kuwo.cn/mingxing/bruno+mars/',
+        'info_dict': {
+            'id': 'bruno+mars',
+            'title': 'Bruno Mars',
+        },
+        'playlist_count': 10,
+    }, {
+        'url': 'http://www.kuwo.cn/mingxing/Ali/music.htm',
+        'info_dict': {
+            'id': 'Ali',
+            'title': 'Ali',
+        },
+        'playlist_mincount': 95,
+    }]
+
+    def _real_extract(self, url):
+        singer_id = self._match_id(url)
+        webpage = self._download_webpage(
+            url, singer_id, note='Download singer info',
+            errnote='Unable to get singer info')
+
+        singer_name = self._html_search_regex(
+            r'<div class="title clearfix">[\n\s\t]*?<h1>(.+?)<span', webpage, 'singer name'
+        )
+
+        entries = []
+        first_page_only = False if re.match(r'.+/music(?:_[0-9]+)?\.htm', url) else True
+        for page_num in itertools.count(1):
+            webpage = self._download_webpage(
+                'http://www.kuwo.cn/mingxing/%s/music_%d.htm' % (singer_id, page_num),
+                singer_id, note='Download song list page #%d' % page_num,
+                errnote='Unable to get song list page #%d' % page_num)
+
+            entries.extend([
+                self.url_result("http://www.kuwo.cn/yinyue/%s/" % song_id, 'Kuwo', song_id)
+                for song_id in re.findall(
+                    r'<p class="m_name"><a href="http://www\.kuwo\.cn/yinyue/([0-9]+)/',
+                    webpage)
+            ][:10 if first_page_only else None])
+
+            if first_page_only or not re.search(r'<a href="[^"]+">下一页</a>', webpage):
+                break
+
+        return self.playlist_result(entries, singer_id, singer_name)
+
+
+class KuwoCategoryIE(InfoExtractor):
+    IE_NAME = 'kuwo:category'
+    _VALID_URL = r'http://yinyue\.kuwo\.cn/yy/cinfo_(?P<id>[0-9]+?).htm'
+    _TEST = {
+        'url': 'http://yinyue.kuwo.cn/yy/cinfo_86375.htm',
+        'info_dict': {
+            'id': '86375',
+            'title': '八十年代精选',
+            'description': '这些都是属于八十年代的回忆！',
+        },
+        'playlist_count': 30,
+    }
+
+    def _real_extract(self, url):
+        category_id = self._match_id(url)
+        webpage = self._download_webpage(
+            url, category_id, note='Download category info',
+            errnote='Unable to get category info')
+
+        category_name = self._html_search_regex(
+            r'<h1 title="([^<>]+?)">[^<>]+?</h1>', webpage, 'category name')
+        
+        category_desc = re.sub(
+            r'^.+简介：', '', get_element_by_id("intro", webpage).strip())
+        
+        jsonm = self._parse_json(self._html_search_regex(
+            r'var jsonm = (\{.+?\});', webpage, 'category songs'), category_id)
+
+        entries = [
+            self.url_result(
+                "http://www.kuwo.cn/yinyue/%s/" % song['musicrid'],
+                'Kuwo', song['musicrid'])
+            for song in jsonm['musiclist']
+        ]
+        return self.playlist_result(entries, category_id, category_name, category_desc)
+
+
+class KuwoMvIE(KuwoIE):
+    IE_NAME = 'kuwo:mv'
+    _VALID_URL = r'http://www\.kuwo\.cn/mv/(?P<id>[0-9]+?)/'
+    _TESTS = [{
+        'url': 'http://www.kuwo.cn/mv/6480076/',
+        'info_dict': {
+            'id': '6480076',
+            'ext': 'mkv',
+            'title': '我们家MV',
+            'creator': '2PM',
+        },
+    }]
+    _FORMATS = KuwoIE._FORMATS + [
+        {'format': 'mkv', 'ext': 'mkv', 'preference': 250},
+        {'format': 'mp4', 'ext': 'mp4', 'preference': 200},
+    ]
+
+    def _real_extract(self, url):
+        song_id = self._match_id(url)
+        webpage = self._download_webpage(
+            url, song_id, note='Download mv detail info: %s' % song_id,
+            errnote='Unable to get mv detail info: %s' % song_id)
+
+        mobj = re.search(
+            r'<h1 title="(?P<song>.+?)">[^<>]+<span .+?title="(?P<singer>.+?)".+?>[^<>]+</span></h1>',
+            webpage)
+        if mobj:
+            song_name = mobj.group('song')
+            singer_name = mobj.group('singer')
+        else:
+            raise ExtractorError("Unable to find song or singer names")
+
+        formats = self._get_formats(song_id)
+
+        return {
+            'id': song_id,
+            'title': song_name,
+            'creator': singer_name,
+            'formats': formats,
+        }

Kuwo is a legal Chinese music streaming service (similar to qqmusic).
