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[core] Update redirect handling from yt-dlp

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* Thx coletdjnz: https://github.com/yt-dlp/yt-dlp/pull/7094
* add test that redirected `POST` loses its `Content-Type`
This commit is contained in:
dirkf 2023-06-07 14:51:50 +01:00
parent 648dc5304c
commit 46fde7caee
2 changed files with 484 additions and 79 deletions
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489
test/test_http.py
View File

@ -8,33 +8,160 @@ import sys
import unittest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import gzip
import io
import ssl
import tempfile
import threading
import zlib
# avoid deprecated alias assertRaisesRegexp
if hasattr(unittest.TestCase, 'assertRaisesRegex'):
unittest.TestCase.assertRaisesRegexp = unittest.TestCase.assertRaisesRegex
try:
import brotli
except ImportError:
brotli = None
try:
from urllib.request import pathname2url
except ImportError:
from urllib import pathname2url
from youtube_dl.compat import (
compat_http_cookiejar_Cookie,
compat_http_server,
compat_str as str,
compat_urllib_error,
compat_urllib_HTTPError,
compat_urllib_parse,
compat_urllib_request,
)
from youtube_dl.utils import (
sanitized_Request,
urlencode_postdata,
)
from test.helper import (
FakeYDL,
FakeLogger,
http_server_port,
)
from youtube_dl import YoutubeDL
from youtube_dl.compat import compat_http_server, compat_urllib_request
import ssl
import threading
TEST_DIR = os.path.dirname(os.path.abspath(__file__))
class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
protocol_version = 'HTTP/1.1'
# work-around old/new -style class inheritance
def super(self, meth_name, *args, **kwargs):
from types import MethodType
try:
super()
fn = lambda s, m, *a, **k: getattr(super(), m)(*a, **k)
except TypeError:
fn = lambda s, m, *a, **k: getattr(compat_http_server.BaseHTTPRequestHandler, m)(s, *a, **k)
self.super = MethodType(fn, self)
return self.super(meth_name, *args, **kwargs)
def log_message(self, format, *args):
pass
def _headers(self):
payload = str(self.headers).encode('utf-8')
self.send_response(200)
self.send_header('Content-Type', 'application/json')
self.send_header('Content-Length', str(len(payload)))
self.end_headers()
self.wfile.write(payload)
def _redirect(self):
self.send_response(int(self.path[len('/redirect_'):]))
self.send_header('Location', '/method')
self.send_header('Content-Length', '0')
self.end_headers()
def _method(self, method, payload=None):
self.send_response(200)
self.send_header('Content-Length', str(len(payload or '')))
self.send_header('Method', method)
self.end_headers()
if payload:
self.wfile.write(payload)
def _status(self, status):
payload = '<html>{0} NOT FOUND</html>'.format(status).encode('utf-8')
self.send_response(int(status))
self.send_header('Content-Type', 'text/html; charset=utf-8')
self.send_header('Content-Length', str(len(payload)))
self.end_headers()
self.wfile.write(payload)
def _read_data(self):
if 'Content-Length' in self.headers:
return self.rfile.read(int(self.headers['Content-Length']))
def _test_url(self, path, host='127.0.0.1', scheme='http', port=None):
return '{0}://{1}:{2}/{3}'.format(
scheme, host,
port if port is not None
else http_server_port(self.server), path)
def do_POST(self):
data = self._read_data()
if self.path.startswith('/redirect_'):
self._redirect()
elif self.path.startswith('/method'):
self._method('POST', data)
elif self.path.startswith('/headers'):
self._headers()
else:
self._status(404)
def do_HEAD(self):
if self.path.startswith('/redirect_'):
self._redirect()
elif self.path.startswith('/method'):
self._method('HEAD')
else:
self._status(404)
def do_PUT(self):
data = self._read_data()
if self.path.startswith('/redirect_'):
self._redirect()
elif self.path.startswith('/method'):
self._method('PUT', data)
else:
self._status(404)
def do_GET(self):
def respond(payload=b'<html><video src="/vid.mp4" /></html>',
payload_type='text/html; charset=utf-8',
payload_encoding=None,
resp_code=200):
self.send_response(resp_code)
self.send_header('Content-Type', payload_type)
if payload_encoding:
self.send_header('Content-Encoding', payload_encoding)
self.send_header('Content-Length', str(len(payload))) # required for persistent connections
self.end_headers()
self.wfile.write(payload)
def gzip_compress(p):
buf = io.BytesIO()
with gzip.GzipFile(fileobj=buf, mode='wb') as f:
f.write(p)
return buf.getvalue()
if self.path == '/video.html':
self.send_response(200)
self.send_header('Content-Type', 'text/html; charset=utf-8')
self.end_headers()
self.wfile.write(b'<html><video src="/vid.mp4" /></html>')
respond()
elif self.path == '/vid.mp4':
self.send_response(200)
self.send_header('Content-Type', 'video/mp4')
self.end_headers()
self.wfile.write(b'\x00\x00\x00\x00\x20\x66\x74[video]')
respond(b'\x00\x00\x00\x00\x20\x66\x74[video]', 'video/mp4')
elif self.path == '/302':
if sys.version_info[0] == 3:
# XXX: Python 3 http server does not allow non-ASCII header values
@ -42,60 +169,284 @@ class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
self.end_headers()
return
new_url = 'http://127.0.0.1:%d/中文.html' % http_server_port(self.server)
new_url = self._test_url('中文.html')
self.send_response(302)
self.send_header(b'Location', new_url.encode('utf-8'))
self.end_headers()
elif self.path == '/%E4%B8%AD%E6%96%87.html':
self.send_response(200)
self.send_header('Content-Type', 'text/html; charset=utf-8')
respond()
elif self.path == '/%c7%9f':
respond()
elif self.path.startswith('/redirect_'):
self._redirect()
elif self.path.startswith('/method'):
self._method('GET')
elif self.path.startswith('/headers'):
self._headers()
elif self.path == '/trailing_garbage':
payload = b'<html><video src="/vid.mp4" /></html>'
compressed = gzip_compress(payload) + b'trailing garbage'
respond(compressed, payload_encoding='gzip')
elif self.path == '/302-non-ascii-redirect':
new_url = self._test_url('中文.html')
# actually respond with permanent redirect
self.send_response(301)
self.send_header('Location', new_url)
self.send_header('Content-Length', '0')
self.end_headers()
self.wfile.write(b'<html><video src="/vid.mp4" /></html>')
elif self.path == '/content-encoding':
encodings = self.headers.get('ytdl-encoding', '')
payload = b'<html><video src="/vid.mp4" /></html>'
for encoding in filter(None, (e.strip() for e in encodings.split(','))):
if encoding == 'br' and brotli:
payload = brotli.compress(payload)
elif encoding == 'gzip':
payload = gzip_compress(payload)
elif encoding == 'deflate':
payload = zlib.compress(payload)
elif encoding == 'unsupported':
payload = b'raw'
break
else:
self._status(415)
return
respond(payload, payload_encoding=encodings)
else:
assert False
self._status(404)
def send_header(self, keyword, value):
"""
Forcibly allow HTTP server to send non percent-encoded non-ASCII characters in headers.
This is against what is defined in RFC 3986: but we need to test that we support this
since some sites incorrectly do this.
"""
if keyword.lower() == 'connection':
return self.super('send_header', keyword, value)
if not hasattr(self, '_headers_buffer'):
self._headers_buffer = []
self._headers_buffer.append('{0}: {1}\r\n'.format(keyword, value).encode('utf-8'))
def end_headers(self):
if hasattr(self, '_headers_buffer'):
self.wfile.write(b''.join(self._headers_buffer))
self._headers_buffer = []
self.super('end_headers')
class TestHTTP(unittest.TestCase):
def setUp(self):
self.httpd = compat_http_server.HTTPServer(
# HTTP server
self.http_httpd = compat_http_server.HTTPServer(
('127.0.0.1', 0), HTTPTestRequestHandler)
self.port = http_server_port(self.httpd)
self.server_thread = threading.Thread(target=self.httpd.serve_forever)
self.server_thread.daemon = True
self.server_thread.start()
self.http_port = http_server_port(self.http_httpd)
def test_unicode_path_redirection(self):
# XXX: Python 3 http server does not allow non-ASCII header values
if sys.version_info[0] == 3:
return
self.http_server_thread = threading.Thread(target=self.http_httpd.serve_forever)
self.http_server_thread.daemon = True
self.http_server_thread.start()
ydl = YoutubeDL({'logger': FakeLogger()})
r = ydl.extract_info('http://127.0.0.1:%d/302' % self.port)
self.assertEqual(r['entries'][0]['url'], 'http://127.0.0.1:%d/vid.mp4' % self.port)
try:
from http.server import ThreadingHTTPServer
except ImportError:
try:
from socketserver import ThreadingMixIn
except ImportError:
from SocketServer import ThreadingMixIn
class ThreadingHTTPServer(ThreadingMixIn, compat_http_server.HTTPServer):
pass
class TestHTTPS(unittest.TestCase):
def setUp(self):
# HTTPS server
certfn = os.path.join(TEST_DIR, 'testcert.pem')
self.httpd = compat_http_server.HTTPServer(
self.https_httpd = ThreadingHTTPServer(
('127.0.0.1', 0), HTTPTestRequestHandler)
self.httpd.socket = ssl.wrap_socket(
self.httpd.socket, certfile=certfn, server_side=True)
self.port = http_server_port(self.httpd)
self.server_thread = threading.Thread(target=self.httpd.serve_forever)
self.server_thread.daemon = True
self.server_thread.start()
try:
sslctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
sslctx.verify_mode = ssl.CERT_NONE
sslctx.check_hostname = False
sslctx.load_cert_chain(certfn, None)
self.https_httpd.socket = sslctx.wrap_socket(
self.https_httpd.socket, server_side=True)
except AttributeError:
self.https_httpd.socket = ssl.wrap_socket(
self.https_httpd.socket, certfile=certfn, server_side=True)
self.https_port = http_server_port(self.https_httpd)
self.https_server_thread = threading.Thread(target=self.https_httpd.serve_forever)
self.https_server_thread.daemon = True
self.https_server_thread.start()
def tearDown(self):
def closer(svr):
def _closer():
svr.shutdown()
svr.server_close()
return _closer
shutdown_thread = threading.Thread(target=closer(self.http_httpd))
shutdown_thread.start()
self.http_server_thread.join(2.0)
shutdown_thread = threading.Thread(target=closer(self.https_httpd))
shutdown_thread.start()
self.https_server_thread.join(2.0)
def _test_url(self, path, host='127.0.0.1', scheme='http', port=None):
return '{0}://{1}:{2}/{3}'.format(
scheme, host,
port if port is not None
else self.https_port if scheme == 'https'
else self.http_port, path)
def test_nocheckcertificate(self):
if sys.version_info >= (2, 7, 9): # No certificate checking anyways
ydl = YoutubeDL({'logger': FakeLogger()})
self.assertRaises(
Exception,
ydl.extract_info, 'https://127.0.0.1:%d/video.html' % self.port)
with FakeYDL({'logger': FakeLogger()}) as ydl:
with self.assertRaises(compat_urllib_error.URLError):
ydl.urlopen(sanitized_Request(self._test_url('headers', scheme='https')))
ydl = YoutubeDL({'logger': FakeLogger(), 'nocheckcertificate': True})
r = ydl.extract_info('https://127.0.0.1:%d/video.html' % self.port)
self.assertEqual(r['entries'][0]['url'], 'https://127.0.0.1:%d/vid.mp4' % self.port)
with FakeYDL({'logger': FakeLogger(), 'nocheckcertificate': True}) as ydl:
r = ydl.urlopen(sanitized_Request(self._test_url('headers', scheme='https')))
self.assertEqual(r.getcode(), 200)
r.close()
def test_percent_encode(self):
with FakeYDL() as ydl:
# Unicode characters should be encoded with uppercase percent-encoding
res = ydl.urlopen(sanitized_Request(self._test_url('中文.html')))
self.assertEqual(res.getcode(), 200)
res.close()
# don't normalize existing percent encodings
res = ydl.urlopen(sanitized_Request(self._test_url('%c7%9f')))
self.assertEqual(res.getcode(), 200)
res.close()
def test_unicode_path_redirection(self):
with FakeYDL() as ydl:
r = ydl.urlopen(sanitized_Request(self._test_url('302-non-ascii-redirect')))
self.assertEqual(r.url, self._test_url('%E4%B8%AD%E6%96%87.html'))
r.close()
def test_redirect(self):
with FakeYDL() as ydl:
def do_req(redirect_status, method, check_no_content=False):
data = b'testdata' if method in ('POST', 'PUT') else None
res = ydl.urlopen(sanitized_Request(
self._test_url('redirect_{0}'.format(redirect_status)),
method=method, data=data))
if check_no_content:
self.assertNotIn('Content-Type', res.headers)
return res.read().decode('utf-8'), res.headers.get('method', '')
# A 303 must either use GET or HEAD for subsequent request
self.assertEqual(do_req(303, 'POST'), ('', 'GET'))
self.assertEqual(do_req(303, 'HEAD'), ('', 'HEAD'))
self.assertEqual(do_req(303, 'PUT'), ('', 'GET'))
# 301 and 302 turn POST only into a GET, with no Content-Type
self.assertEqual(do_req(301, 'POST', True), ('', 'GET'))
self.assertEqual(do_req(301, 'HEAD'), ('', 'HEAD'))
self.assertEqual(do_req(302, 'POST', True), ('', 'GET'))
self.assertEqual(do_req(302, 'HEAD'), ('', 'HEAD'))
self.assertEqual(do_req(301, 'PUT'), ('testdata', 'PUT'))
self.assertEqual(do_req(302, 'PUT'), ('testdata', 'PUT'))
# 307 and 308 should not change method
for m in ('POST', 'PUT'):
self.assertEqual(do_req(307, m), ('testdata', m))
self.assertEqual(do_req(308, m), ('testdata', m))
self.assertEqual(do_req(307, 'HEAD'), ('', 'HEAD'))
self.assertEqual(do_req(308, 'HEAD'), ('', 'HEAD'))
# These should not redirect and instead raise an HTTPError
for code in (300, 304, 305, 306):
with self.assertRaises(compat_urllib_HTTPError):
do_req(code, 'GET')
def test_content_type(self):
# https://github.com/yt-dlp/yt-dlp/commit/379a4f161d4ad3e40932dcf5aca6e6fb9715ab28
with FakeYDL({'nocheckcertificate': True}) as ydl:
# method should be auto-detected as POST
r = sanitized_Request(self._test_url('headers', scheme='https'), data=urlencode_postdata({'test': 'test'}))
headers = ydl.urlopen(r).read().decode('utf-8')
self.assertIn('Content-Type: application/x-www-form-urlencoded', headers)
# test http
r = sanitized_Request(self._test_url('headers'), data=urlencode_postdata({'test': 'test'}))
headers = ydl.urlopen(r).read().decode('utf-8')
self.assertIn('Content-Type: application/x-www-form-urlencoded', headers)
def test_cookiejar(self):
with FakeYDL() as ydl:
ydl.cookiejar.set_cookie(compat_http_cookiejar_Cookie(
0, 'test', 'ytdl', None, False, '127.0.0.1', True,
False, '/headers', True, False, None, False, None, None, {}))
data = ydl.urlopen(sanitized_Request(self._test_url('headers'))).read()
self.assertIn(b'Cookie: test=ytdl', data)
def test_no_compression_compat_header(self):
with FakeYDL() as ydl:
data = ydl.urlopen(
sanitized_Request(
self._test_url('headers'),
headers={'Youtubedl-no-compression': True})).read()
self.assertIn(b'Accept-Encoding: identity', data)
self.assertNotIn(b'youtubedl-no-compression', data.lower())
def test_gzip_trailing_garbage(self):
# https://github.com/ytdl-org/youtube-dl/commit/aa3e950764337ef9800c936f4de89b31c00dfcf5
# https://github.com/ytdl-org/youtube-dl/commit/6f2ec15cee79d35dba065677cad9da7491ec6e6f
with FakeYDL() as ydl:
data = ydl.urlopen(sanitized_Request(self._test_url('trailing_garbage'))).read().decode('utf-8')
self.assertEqual(data, '<html><video src="/vid.mp4" /></html>')
def __test_compression(self, encoding):
with FakeYDL() as ydl:
res = ydl.urlopen(
sanitized_Request(
self._test_url('content-encoding'),
headers={'ytdl-encoding': encoding}))
self.assertEqual(res.headers.get('Content-Encoding'), encoding)
self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
@unittest.skipUnless(brotli, 'brotli support is not installed')
@unittest.expectedFailure
def test_brotli(self):
self.__test_compression('br')
@unittest.expectedFailure
def test_deflate(self):
self.__test_compression('deflate')
@unittest.expectedFailure
def test_gzip(self):
self.__test_compression('gzip')
@unittest.expectedFailure # not yet implemented
def test_multiple_encodings(self):
# https://www.rfc-editor.org/rfc/rfc9110.html#section-8.4
with FakeYDL() as ydl:
for pair in ('gzip,deflate', 'deflate, gzip', 'gzip, gzip', 'deflate, deflate'):
res = ydl.urlopen(
sanitized_Request(
self._test_url('content-encoding'),
headers={'ytdl-encoding': pair}))
self.assertEqual(res.headers.get('Content-Encoding'), pair)
self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
def test_unsupported_encoding(self):
# it should return the raw content
with FakeYDL() as ydl:
res = ydl.urlopen(
sanitized_Request(
self._test_url('content-encoding'),
headers={'ytdl-encoding': 'unsupported'}))
self.assertEqual(res.headers.get('Content-Encoding'), 'unsupported')
self.assertEqual(res.read(), b'raw')
def _build_proxy_handler(name):
@ -109,7 +460,7 @@ def _build_proxy_handler(name):
self.send_response(200)
self.send_header('Content-Type', 'text/plain; charset=utf-8')
self.end_headers()
self.wfile.write('{self.proxy_name}: {self.path}'.format(self=self).encode('utf-8'))
self.wfile.write('{0}: {1}'.format(self.proxy_name, self.path).encode('utf-8'))
return HTTPTestRequestHandler
@ -129,10 +480,30 @@ class TestProxy(unittest.TestCase):
self.geo_proxy_thread.daemon = True
self.geo_proxy_thread.start()
def tearDown(self):
def closer(svr):
def _closer():
svr.shutdown()
svr.server_close()
return _closer
shutdown_thread = threading.Thread(target=closer(self.proxy))
shutdown_thread.start()
self.proxy_thread.join(2.0)
shutdown_thread = threading.Thread(target=closer(self.geo_proxy))
shutdown_thread.start()
self.geo_proxy_thread.join(2.0)
def _test_proxy(self, host='127.0.0.1', port=None):
return '{0}:{1}'.format(
host, port if port is not None else self.port)
def test_proxy(self):
geo_proxy = '127.0.0.1:{0}'.format(self.geo_port)
geo_proxy = self._test_proxy(port=self.geo_port)
ydl = YoutubeDL({
'proxy': '127.0.0.1:{0}'.format(self.port),
'proxy': self._test_proxy(),
'geo_verification_proxy': geo_proxy,
})
url = 'http://foo.com/bar'
@ -146,7 +517,7 @@ class TestProxy(unittest.TestCase):
def test_proxy_with_idn(self):
ydl = YoutubeDL({
'proxy': '127.0.0.1:{0}'.format(self.port),
'proxy': self._test_proxy(),
})
url = 'http://中文.tw/'
response = ydl.urlopen(url).read().decode('utf-8')
@ -154,5 +525,25 @@ class TestProxy(unittest.TestCase):
self.assertEqual(response, 'normal: http://xn--fiq228c.tw/')
class TestFileURL(unittest.TestCase):
# See https://github.com/ytdl-org/youtube-dl/issues/8227
def test_file_urls(self):
tf = tempfile.NamedTemporaryFile(delete=False)
tf.write(b'foobar')
tf.close()
url = compat_urllib_parse.urljoin('file://', pathname2url(tf.name))
with FakeYDL() as ydl:
self.assertRaisesRegexp(
compat_urllib_error.URLError, 'file:// scheme is explicitly disabled in youtube-dl for security reasons', ydl.urlopen, url)
# not yet implemented
"""
with FakeYDL({'enable_file_urls': True}) as ydl:
res = ydl.urlopen(url)
self.assertEqual(res.read(), b'foobar')
res.close()
"""
os.unlink(tf.name)
if __name__ == '__main__':
unittest.main()

74
youtube_dl/utils.py
View File

@ -41,7 +41,6 @@ import zlib
from .compat import (
compat_HTMLParseError,
compat_HTMLParser,
compat_HTTPError,
compat_basestring,
compat_casefold,
compat_chr,
@ -64,6 +63,7 @@ from .compat import (
compat_struct_pack,
compat_struct_unpack,
compat_urllib_error,
compat_urllib_HTTPError,
compat_urllib_parse,
compat_urllib_parse_parse_qs as compat_parse_qs,
compat_urllib_parse_urlencode,
@ -2614,7 +2614,8 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
Part of this code was copied from:
http://techknack.net/python-urllib2-handlers/
http://techknack.net/python-urllib2-handlers/, archived at
https://web.archive.org/web/20130527205558/http://techknack.net/python-urllib2-handlers/
Andrew Rowls, the author of that code, agreed to release it to the
public domain.
@ -2672,7 +2673,9 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
req._Request__original = req._Request__original.partition('#')[0]
req._Request__r_type = req._Request__r_type.partition('#')[0]
return req
# Use the totally undocumented AbstractHTTPHandler per
# https://github.com/yt-dlp/yt-dlp/pull/4158
return compat_urllib_request.AbstractHTTPHandler.do_request_(self, req)
def http_response(self, req, resp):
old_resp = resp
@ -2683,7 +2686,7 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
try:
uncompressed = io.BytesIO(gz.read())
except IOError as original_ioerror:
# There may be junk add the end of the file
# There may be junk at the end of the file
# See http://stackoverflow.com/q/4928560/35070 for details
for i in range(1, 1024):
try:
@ -2710,9 +2713,8 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
if location:
# As of RFC 2616 default charset is iso-8859-1 that is respected by python 3
if sys.version_info >= (3, 0):
location = location.encode('iso-8859-1').decode('utf-8')
else:
location = location.decode('utf-8')
location = location.encode('iso-8859-1')
location = location.decode('utf-8')
location_escaped = escape_url(location)
if location != location_escaped:
del resp.headers['Location']
@ -2940,17 +2942,16 @@ class YoutubeDLRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
The code is based on HTTPRedirectHandler implementation from CPython [1].
This redirect handler solves two issues:
- ensures redirect URL is always unicode under python 2
- introduces support for experimental HTTP response status code
308 Permanent Redirect [2] used by some sites [3]
This redirect handler fixes and improves the logic to better align with RFC7261
and what browsers tend to do [2][3]
1. https://github.com/python/cpython/blob/master/Lib/urllib/request.py
2. https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/308
3. https://github.com/ytdl-org/youtube-dl/issues/28768
2. https://datatracker.ietf.org/doc/html/rfc7231
3. https://github.com/python/cpython/issues/91306
"""
http_error_301 = http_error_303 = http_error_307 = http_error_308 = compat_urllib_request.HTTPRedirectHandler.http_error_302
# Supply possibly missing alias
http_error_308 = compat_urllib_request.HTTPRedirectHandler.http_error_302
def redirect_request(self, req, fp, code, msg, headers, newurl):
"""Return a Request or None in response to a redirect.
@ -2962,19 +2963,16 @@ class YoutubeDLRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
else should try to handle this url. Return None if you can't
but another Handler might.
"""
m = req.get_method()
if (not (code in (301, 302, 303, 307, 308) and m in ("GET", "HEAD")
or code in (301, 302, 303) and m == "POST")):
raise compat_HTTPError(req.full_url, code, msg, headers, fp)
# Strictly (according to RFC 2616), 301 or 302 in response to
# a POST MUST NOT cause a redirection without confirmation
# from the user (of urllib.request, in this case). In practice,
# essentially all clients do redirect in this case, so we do
# the same.
if code not in (301, 302, 303, 307, 308):
raise compat_urllib_HTTPError(req.full_url, code, msg, headers, fp)
new_method = req.get_method()
new_data = req.data
remove_headers = []
# On python 2 urlh.geturl() may sometimes return redirect URL
# as byte string instead of unicode. This workaround allows
# to force it always return unicode.
# as a byte string instead of unicode. This workaround forces
# it to return unicode.
if sys.version_info[0] < 3:
newurl = compat_str(newurl)
@ -2983,13 +2981,29 @@ class YoutubeDLRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
# but it is kept for compatibility with other callers.
newurl = newurl.replace(' ', '%20')
CONTENT_HEADERS = ("content-length", "content-type")
# A 303 must either use GET or HEAD for subsequent request
# https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.4
if code == 303 and req.get_method() != 'HEAD':
new_method = 'GET'
# 301 and 302 redirects are commonly turned into a GET from a POST
# for subsequent requests by browsers, so we'll do the same.
# https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.2
# https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.3
elif code in (301, 302) and req.get_method() == 'POST':
new_method = 'GET'
# only remove payload if method changed (e.g. POST to GET)
if new_method != req.get_method():
new_data = None
remove_headers.extend(['Content-Length', 'Content-Type'])
# NB: don't use dict comprehension for python 2.6 compatibility
newheaders = dict((k, v) for k, v in req.headers.items()
if k.lower() not in CONTENT_HEADERS)
new_headers = dict((k, v) for k, v in req.header_items()
if k.lower() not in remove_headers)
return compat_urllib_request.Request(
newurl, headers=newheaders, origin_req_host=req.origin_req_host,
unverifiable=True)
newurl, headers=new_headers, origin_req_host=req.origin_req_host,
unverifiable=True, method=new_method, data=new_data)
def extract_timezone(date_str):