1 files changed, 50 insertions, 0 deletions
diff --git a/youtube_dl/extractor/commonmistakes.py b/youtube_dl/extractor/commonmistakes.py
new file mode 100644
index 0000000..79f7a9c
--- /dev/null
+++ b/youtube_dl/extractor/commonmistakes.py
@@ -0,0 +1,50 @@
+from __future__ import unicode_literals
+
+import sys
+
+from .common import InfoExtractor
+from ..utils import ExtractorError
+
+
+class CommonMistakesIE(InfoExtractor):
+    IE_DESC = False  # Do not list
+    _VALID_URL = r'''(?x)
+        (?:url|URL)$
+    '''
+
+    _TESTS = [{
+        'url': 'url',
+        'only_matching': True,
+    }, {
+        'url': 'URL',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        msg = (
+            'You\'ve asked youtube-dl to download the URL "%s". '
+            'That doesn\'t make any sense. '
+            'Simply remove the parameter in your command or configuration.'
+        ) % url
+        if not self._downloader.params.get('verbose'):
+            msg += ' Add -v to the command line to see what arguments and configuration youtube-dl got.'
+        raise ExtractorError(msg, expected=True)
+
+
+class UnicodeBOMIE(InfoExtractor):
+        IE_DESC = False
+        _VALID_URL = r'(?P<bom>\ufeff)(?P<id>.*)$'
+
+        # Disable test for python 3.2 since BOM is broken in re in this version
+        # (see https://github.com/rg3/youtube-dl/issues/9751)
+        _TESTS = [] if (3, 0) < sys.version_info <= (3, 3) else [{
+            'url': '\ufeffhttp://www.youtube.com/watch?v=BaW_jenozKc',
+            'only_matching': True,
+        }]
+
+        def _real_extract(self, url):
+            real_url = self._match_id(url)
+            self.report_warning(
+                'Your URL starts with a Byte Order Mark (BOM). '
+                'Removing the BOM and looking for "%s" ...' % real_url)
+            return self.url_result(real_url)