[yam] Remove extractor

mymedia.yam.com is dead. An wikipedia user also pointed out that Yam's
blog service is no longer available. [1]

[1] https://zh.wikipedia.org/zh-tw/%E5%A4%A9%E7%A9%BA%E9%83%A8%E8%90%BD

ChangeLog

@@ -1,3 +1,9 @@
+version <unreleased>
+
+Extractors
+- [yam] Remove extractor
+
+
 version 2017.07.02
 
 Core

youtube_dl/extractor/extractors.py

@@ -1280,7 +1280,6 @@ from .yahoo import (
     YahooIE,
     YahooSearchIE,
 )
-from .yam import YamIE
 from .yandexmusic import (
     YandexMusicTrackIE,
     YandexMusicAlbumIE,

youtube_dl/extractor/yam.py

@@ -1,123 +0,0 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-import re
-
-from .common import InfoExtractor
-from ..compat import compat_urlparse
-from ..utils import (
-    float_or_none,
-    month_by_abbreviation,
-    ExtractorError,
-    get_element_by_attribute,
-)
-
-
-class YamIE(InfoExtractor):
-    IE_DESC = '蕃薯藤yam天空部落'
-    _VALID_URL = r'https?://mymedia\.yam\.com/m/(?P<id>\d+)'
-
-    _TESTS = [{
-        # An audio hosted on Yam
-        'url': 'http://mymedia.yam.com/m/2283921',
-        'md5': 'c011b8e262a52d5473d9c2e3c9963b9c',
-        'info_dict': {
-            'id': '2283921',
-            'ext': 'mp3',
-            'title': '發現 - 趙薇 京華煙雲主題曲',
-            'description': '發現 - 趙薇 京華煙雲主題曲',
-            'uploader_id': 'princekt',
-            'upload_date': '20080807',
-            'duration': 313.0,
-        }
-    }, {
-        # An external video hosted on YouTube
-        'url': 'http://mymedia.yam.com/m/3599430',
-        'md5': '03127cf10d8f35d120a9e8e52e3b17c6',
-        'info_dict': {
-            'id': 'CNpEoQlrIgA',
-            'ext': 'mp4',
-            'upload_date': '20150306',
-            'uploader': '新莊社大瑜伽社',
-            'description': 'md5:11e2e405311633ace874f2e6226c8b17',
-            'uploader_id': '2323agoy',
-            'title': '20090412陽明山二子坪-1',
-        },
-        'skip': 'Video does not exist',
-    }, {
-        'url': 'http://mymedia.yam.com/m/3598173',
-        'info_dict': {
-            'id': '3598173',
-            'ext': 'mp4',
-        },
-        'skip': 'cause Yam system error',
-    }, {
-        'url': 'http://mymedia.yam.com/m/3599437',
-        'info_dict': {
-            'id': '3599437',
-            'ext': 'mp4',
-        },
-        'skip': 'invalid YouTube URL',
-    }, {
-        'url': 'http://mymedia.yam.com/m/2373534',
-        'md5': '7ff74b91b7a817269d83796f8c5890b1',
-        'info_dict': {
-            'id': '2373534',
-            'ext': 'mp3',
-            'title': '林俊傑&蔡卓妍-小酒窩',
-            'description': 'md5:904003395a0fcce6cfb25028ff468420',
-            'upload_date': '20080928',
-            'uploader_id': 'onliner2',
-        }
-    }]
-
-    def _real_extract(self, url):
-        video_id = self._match_id(url)
-        page = self._download_webpage(url, video_id)
-
-        # Check for errors
-        system_msg = self._html_search_regex(
-            r'系統訊息(?:<br>|\n|\r)*([^<>]+)<br>', page, 'system message',
-            default=None)
-        if system_msg:
-            raise ExtractorError(system_msg, expected=True)
-
-        # Is it hosted externally on YouTube?
-        youtube_url = self._html_search_regex(
-            r'<embed src="(http://www.youtube.com/[^"]+)"',
-            page, 'YouTube url', default=None)
-        if youtube_url:
-            return self.url_result(youtube_url, 'Youtube')
-
-        title = self._html_search_regex(
-            r'<h1[^>]+class="heading"[^>]*>\s*(.+)\s*</h1>', page, 'title')
-
-        api_page = self._download_webpage(
-            'http://mymedia.yam.com/api/a/?pID=' + video_id, video_id,
-            note='Downloading API page')
-        api_result_obj = compat_urlparse.parse_qs(api_page)
-
-        info_table = get_element_by_attribute('class', 'info', page)
-        uploader_id = self._html_search_regex(
-            r'<!-- 發表作者 -->：[\n ]+<a href="/([a-z0-9]+)"',
-            info_table, 'uploader id', fatal=False)
-        mobj = re.search(r'<!-- 發表於 -->(?P<mon>[A-Z][a-z]{2})\s+' +
-                         r'(?P<day>\d{1,2}), (?P<year>\d{4})', page)
-        if mobj:
-            upload_date = '%s%02d%02d' % (
-                mobj.group('year'),
-                month_by_abbreviation(mobj.group('mon')),
-                int(mobj.group('day')))
-        else:
-            upload_date = None
-        duration = float_or_none(api_result_obj['totaltime'][0], scale=1000)
-
-        return {
-            'id': video_id,
-            'url': api_result_obj['mp3file'][0],
-            'title': title,
-            'description': self._html_search_meta('description', page),
-            'duration': duration,
-            'uploader_id': uploader_id,
-            'upload_date': upload_date,
-        }