[naver] Fix video url (fixes #5809)

RTMP urls in test:naver does not work. Need more investigation.

youtube_dl/extractor/naver.py

@@ -6,6 +6,7 @@ import re
 from .common import InfoExtractor
 from ..compat import (
     compat_urllib_parse,
+    compat_urlparse,
 )
 from ..utils import (
     ExtractorError,
@@ -16,7 +17,7 @@ from ..utils import (
 class NaverIE(InfoExtractor):
     _VALID_URL = r'https?://(?:m\.)?tvcast\.naver\.com/v/(?P<id>\d+)'
 
-    _TEST = {
+    _TESTS = [{
         'url': 'http://tvcast.naver.com/v/81652',
         'info_dict': {
             'id': '81652',
@@ -25,7 +26,18 @@ class NaverIE(InfoExtractor):
             'description': '합격불변의 법칙 메가스터디 | 메가스터디 수학 김상희 선생님이 9월 모의고사 수학A형 16번에서 20번까지 해설강의를 공개합니다.',
             'upload_date': '20130903',
         },
-    }
+    }, {
+        'url': 'http://tvcast.naver.com/v/395837',
+        'md5': '638ed4c12012c458fefcddfd01f173cd',
+        'info_dict': {
+            'id': '395837',
+            'ext': 'mp4',
+            'title': '9년이 지나도 아픈 기억, 전효성의 아버지',
+            'description': 'md5:5bf200dcbf4b66eb1b350d1eb9c753f7',
+            'upload_date': '20150519',
+        },
+        'skip': 'Georestricted',
+    }]
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
@@ -58,14 +70,18 @@ class NaverIE(InfoExtractor):
         formats = []
         for format_el in urls.findall('EncodingOptions/EncodingOption'):
             domain = format_el.find('Domain').text
+            uri = format_el.find('uri').text
             f = {
-                'url': domain + format_el.find('uri').text,
+                'url': compat_urlparse.urljoin(domain, uri),
                 'ext': 'mp4',
                 'width': int(format_el.find('width').text),
                 'height': int(format_el.find('height').text),
             }
             if domain.startswith('rtmp'):
+                # urlparse does not support custom schemes
+                # https://bugs.python.org/issue18828
                 f.update({
+                    'url': domain + uri,
                     'ext': 'flv',
                     'rtmp_protocol': '1',  # rtmpt
                 })