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https://github.com/ytdl-org/youtube-dl.git
synced 2024-12-22 14:25:12 +00:00
[utils] Rework URL path munging for ., .. components
* move processing to YoutubeDLHandler * also process `Location` header for redirect * use tests from https://github.com/yt-dlp/yt-dlp/pull/7662
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dirkf
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e7926ae9f4
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@ -180,6 +180,12 @@ class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
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respond()
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elif self.path == '/%c7%9f':
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respond()
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elif self.path == '/redirect_dotsegments':
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self.send_response(301)
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# redirect to /headers but with dot segments before
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self.send_header('Location', '/a/b/./../../headers')
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self.send_header('Content-Length', '0')
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self.end_headers()
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elif self.path.startswith('/redirect_'):
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self._redirect()
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elif self.path.startswith('/method'):
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@ -489,6 +495,14 @@ class TestHTTP(unittest.TestCase):
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self.assertEqual(res.headers.get('Content-Encoding'), 'unsupported')
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self.assertEqual(res.read(), b'raw')
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def test_remove_dot_segments(self):
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with FakeYDL() as ydl:
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res = ydl.urlopen(sanitized_Request(self._test_url('a/b/./../../headers')))
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self.assertEqual(compat_urllib_parse.urlparse(res.geturl()).path, '/headers')
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res = ydl.urlopen(sanitized_Request(self._test_url('redirect_dotsegments')))
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self.assertEqual(compat_urllib_parse.urlparse(res.geturl()).path, '/headers')
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def _build_proxy_handler(name):
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class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
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@ -64,6 +64,7 @@ from youtube_dl.utils import (
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parse_age_limit,
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parse_duration,
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parse_filesize,
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parse_codecs,
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parse_count,
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parse_iso8601,
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parse_resolution,
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@ -114,7 +115,7 @@ from youtube_dl.utils import (
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cli_option,
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cli_valueless_option,
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cli_bool_option,
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parse_codecs,
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YoutubeDLHandler,
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)
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from youtube_dl.compat import (
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compat_chr,
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@ -905,6 +906,32 @@ class TestUtil(unittest.TestCase):
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)
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self.assertEqual(escape_url('http://vimeo.com/56015672#at=0'), 'http://vimeo.com/56015672#at=0')
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def test_remove_dot_segments(self):
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def remove_dot_segments(p):
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q = '' if p.startswith('/') else '/'
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p = 'http://example.com' + q + p
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p = compat_urlparse.urlsplit(YoutubeDLHandler._fix_path(p)).path
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return p[1:] if q else p
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self.assertEqual(remove_dot_segments('/a/b/c/./../../g'), '/a/g')
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self.assertEqual(remove_dot_segments('mid/content=5/../6'), 'mid/6')
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self.assertEqual(remove_dot_segments('/ad/../cd'), '/cd')
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self.assertEqual(remove_dot_segments('/ad/../cd/'), '/cd/')
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self.assertEqual(remove_dot_segments('/..'), '/')
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self.assertEqual(remove_dot_segments('/./'), '/')
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self.assertEqual(remove_dot_segments('/./a'), '/a')
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self.assertEqual(remove_dot_segments('/abc/./.././d/././e/.././f/./../../ghi'), '/ghi')
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self.assertEqual(remove_dot_segments('/'), '/')
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self.assertEqual(remove_dot_segments('/t'), '/t')
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self.assertEqual(remove_dot_segments('t'), 't')
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self.assertEqual(remove_dot_segments(''), '')
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self.assertEqual(remove_dot_segments('/../a/b/c'), '/a/b/c')
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self.assertEqual(remove_dot_segments('../a'), 'a')
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self.assertEqual(remove_dot_segments('./a'), 'a')
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self.assertEqual(remove_dot_segments('.'), '')
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self.assertEqual(remove_dot_segments('////'), '////')
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def test_js_to_json_vars_strings(self):
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self.assertDictEqual(
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json.loads(js_to_json(
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@ -71,7 +71,6 @@ from .utils import (
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format_bytes,
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formatSeconds,
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GeoRestrictedError,
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HEADRequest,
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int_or_none,
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ISO3166Utils,
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join_nonempty,
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@ -88,7 +87,6 @@ from .utils import (
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preferredencoding,
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prepend_extension,
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process_communicate_or_kill,
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PUTRequest,
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register_socks_protocols,
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render_table,
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replace_extension,
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@ -2460,27 +2458,6 @@ class YoutubeDL(object):
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""" Start an HTTP download """
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if isinstance(req, compat_basestring):
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req = sanitized_Request(req)
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# an embedded /../ sequence is not automatically handled by urllib2
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# see https://github.com/yt-dlp/yt-dlp/issues/3355
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url = req.get_full_url()
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parts = url.partition('/../')
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if parts[1]:
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url = compat_urllib_parse.urljoin(parts[0] + parts[1][:1], parts[1][1:] + parts[2])
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if url:
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# worse, URL path may have initial /../ against RFCs: work-around
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# by stripping such prefixes, like eg Firefox
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parts = compat_urllib_parse.urlsplit(url)
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path = parts.path
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while path.startswith('/../'):
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path = path[3:]
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url = parts._replace(path=path).geturl()
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# get a new Request with the munged URL
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if url != req.get_full_url():
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req_type = {'HEAD': HEADRequest, 'PUT': PUTRequest}.get(
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req.get_method(), compat_urllib_request.Request)
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req = req_type(
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url, data=req.data, headers=dict(req.header_items()),
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origin_req_host=req.origin_req_host, unverifiable=req.unverifiable)
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return self._opener.open(req, timeout=self._socket_timeout)
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def print_debug_header(self):
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@ -2678,17 +2678,52 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
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def compress(data):
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return data and ncompress.decompress(data)
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@staticmethod
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def _fix_path(url):
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# an embedded /../ or /./ sequence is not automatically handled by urllib2
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# see https://github.com/yt-dlp/yt-dlp/issues/3355
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parsed_url = compat_urllib_parse.urlsplit(url)
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path = parsed_url.path
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if not path.endswith('/'):
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path += '/'
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parts = path.partition('/./')
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if not parts[1]:
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parts = path.partition('/../')
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if parts[1]:
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path = compat_urllib_parse.urljoin(
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parts[0] + parts[1][:1],
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parts[1][1:] + (parts[2] if parsed_url.path.endswith('/') else parts[2][:-1]))
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url = parsed_url._replace(path=path).geturl()
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if '/.' in url:
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# worse, URL path may have initial /../ against RFCs: work-around
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# by stripping such prefixes, like eg Firefox
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path = parsed_url.path + '/'
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while path.startswith('/.'):
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if path.startswith('/../'):
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path = path[3:]
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elif path.startswith('/./'):
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path = path[2:]
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else:
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break
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path = path[:-1]
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if not path.startswith('/') and parsed_url.path.startswith('/'):
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path = '/' + path
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url = parsed_url._replace(path=path).geturl()
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return url
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def http_request(self, req):
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# According to RFC 3986, URLs can not contain non-ASCII characters, however this is not
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# always respected by websites, some tend to give out URLs with non percent-encoded
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url = req.get_full_url()
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# resolve embedded . and ..
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url_fixed = self._fix_path(url)
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# According to RFC 3986, URLs can not contain non-ASCII characters; however this is not
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# always respected by websites: some tend to give out URLs with non percent-encoded
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# non-ASCII characters (see telemb.py, ard.py [#3412])
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# urllib chokes on URLs with non-ASCII characters (see http://bugs.python.org/issue3991)
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# To work around aforementioned issue we will replace request's original URL with
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# percent-encoded one
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# Since redirects are also affected (e.g. http://www.southpark.de/alle-episoden/s18e09)
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# the code of this workaround has been moved here from YoutubeDL.urlopen()
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url = req.get_full_url()
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url_escaped = escape_url(url)
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url_escaped = escape_url(url_fixed)
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# Substitute URL if any change after escaping
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if url != url_escaped:
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@ -2702,7 +2737,10 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
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req.headers = handle_youtubedl_headers(req.headers)
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if sys.version_info < (2, 7) and '#' in req.get_full_url():
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if sys.version_info < (2, 7):
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# avoid possible race where __r_type may be unset
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req.get_type()
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if '#' in req.get_full_url():
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# Python 2.6 is brain-dead when it comes to fragments
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req._Request__original = req._Request__original.partition('#')[0]
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req._Request__r_type = req._Request__r_type.partition('#')[0]
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@ -2775,10 +2813,13 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
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if sys.version_info >= (3, 0):
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location = location.encode('iso-8859-1')
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location = location.decode('utf-8')
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location_escaped = escape_url(location)
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# resolve embedded . and ..
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location_fixed = self._fix_path(location)
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location_escaped = escape_url(location_fixed)
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if location != location_escaped:
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del resp.headers['Location']
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if sys.version_info < (3, 0):
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# if sys.version_info < (3, 0):
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if not isinstance(location_escaped, str):
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location_escaped = location_escaped.encode('utf-8')
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resp.headers['Location'] = location_escaped
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return resp
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@ -4248,13 +4289,8 @@ def update_Request(req, url=None, data=None, headers={}, query={}):
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req_headers.update(headers)
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req_data = data if data is not None else req.data
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req_url = update_url_query(url or req.get_full_url(), query)
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req_get_method = req.get_method()
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if req_get_method == 'HEAD':
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req_type = HEADRequest
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elif req_get_method == 'PUT':
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req_type = PUTRequest
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else:
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req_type = compat_urllib_request.Request
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req_type = {'HEAD': HEADRequest, 'PUT': PUTRequest}.get(
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req.get_method(), compat_urllib_request.Request)
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new_req = req_type(
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req_url, data=req_data, headers=req_headers,
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origin_req_host=req.origin_req_host, unverifiable=req.unverifiable)
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