yt-dlp/yt_dlp/networking/_urllib.py
pukkandan c365dba843
[networking] Add module (#2861)
No actual changes - code is only moved around
2023-07-15 16:18:34 +05:30

316 lines
12 KiB
Python

import functools
import gzip
import http.client
import io
import socket
import ssl
import urllib.error
import urllib.parse
import urllib.request
import urllib.response
import zlib
from ._helper import (
add_accept_encoding_header,
get_redirect_method,
make_socks_proxy_opts,
)
from ..dependencies import brotli
from ..socks import sockssocket
from ..utils import escape_url, update_url_query
from ..utils.networking import clean_headers, std_headers
SUPPORTED_ENCODINGS = ['gzip', 'deflate']
if brotli:
SUPPORTED_ENCODINGS.append('br')
def _create_http_connection(ydl_handler, http_class, is_https, *args, **kwargs):
hc = http_class(*args, **kwargs)
source_address = ydl_handler._params.get('source_address')
if source_address is not None:
# This is to workaround _create_connection() from socket where it will try all
# address data from getaddrinfo() including IPv6. This filters the result from
# getaddrinfo() based on the source_address value.
# This is based on the cpython socket.create_connection() function.
# https://github.com/python/cpython/blob/master/Lib/socket.py#L691
def _create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT, source_address=None):
host, port = address
err = None
addrs = socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM)
af = socket.AF_INET if '.' in source_address[0] else socket.AF_INET6
ip_addrs = [addr for addr in addrs if addr[0] == af]
if addrs and not ip_addrs:
ip_version = 'v4' if af == socket.AF_INET else 'v6'
raise OSError(
"No remote IP%s addresses available for connect, can't use '%s' as source address"
% (ip_version, source_address[0]))
for res in ip_addrs:
af, socktype, proto, canonname, sa = res
sock = None
try:
sock = socket.socket(af, socktype, proto)
if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
sock.settimeout(timeout)
sock.bind(source_address)
sock.connect(sa)
err = None # Explicitly break reference cycle
return sock
except OSError as _:
err = _
if sock is not None:
sock.close()
if err is not None:
raise err
else:
raise OSError('getaddrinfo returns an empty list')
if hasattr(hc, '_create_connection'):
hc._create_connection = _create_connection
hc.source_address = (source_address, 0)
return hc
class HTTPHandler(urllib.request.HTTPHandler):
"""Handler for HTTP requests and responses.
This class, when installed with an OpenerDirector, automatically adds
the standard headers to every HTTP request and handles gzipped, deflated and
brotli responses from web servers.
Part of this code was copied from:
http://techknack.net/python-urllib2-handlers/
Andrew Rowls, the author of that code, agreed to release it to the
public domain.
"""
def __init__(self, params, *args, **kwargs):
urllib.request.HTTPHandler.__init__(self, *args, **kwargs)
self._params = params
def http_open(self, req):
conn_class = http.client.HTTPConnection
socks_proxy = req.headers.get('Ytdl-socks-proxy')
if socks_proxy:
conn_class = make_socks_conn_class(conn_class, socks_proxy)
del req.headers['Ytdl-socks-proxy']
return self.do_open(functools.partial(
_create_http_connection, self, conn_class, False),
req)
@staticmethod
def deflate(data):
if not data:
return data
try:
return zlib.decompress(data, -zlib.MAX_WBITS)
except zlib.error:
return zlib.decompress(data)
@staticmethod
def brotli(data):
if not data:
return data
return brotli.decompress(data)
@staticmethod
def gz(data):
gz = gzip.GzipFile(fileobj=io.BytesIO(data), mode='rb')
try:
return gz.read()
except OSError as original_oserror:
# There may be junk add the end of the file
# See http://stackoverflow.com/q/4928560/35070 for details
for i in range(1, 1024):
try:
gz = gzip.GzipFile(fileobj=io.BytesIO(data[:-i]), mode='rb')
return gz.read()
except OSError:
continue
else:
raise original_oserror
def http_request(self, req):
# According to RFC 3986, URLs can not contain non-ASCII characters, however this is not
# always respected by websites, some tend to give out URLs with non percent-encoded
# non-ASCII characters (see telemb.py, ard.py [#3412])
# urllib chokes on URLs with non-ASCII characters (see http://bugs.python.org/issue3991)
# To work around aforementioned issue we will replace request's original URL with
# percent-encoded one
# Since redirects are also affected (e.g. http://www.southpark.de/alle-episoden/s18e09)
# the code of this workaround has been moved here from YoutubeDL.urlopen()
url = req.get_full_url()
url_escaped = escape_url(url)
# Substitute URL if any change after escaping
if url != url_escaped:
req = update_Request(req, url=url_escaped)
for h, v in self._params.get('http_headers', std_headers).items():
# Capitalize is needed because of Python bug 2275: http://bugs.python.org/issue2275
# The dict keys are capitalized because of this bug by urllib
if h.capitalize() not in req.headers:
req.add_header(h, v)
clean_headers(req.headers)
add_accept_encoding_header(req.headers, SUPPORTED_ENCODINGS)
return super().do_request_(req)
def http_response(self, req, resp):
old_resp = resp
# Content-Encoding header lists the encodings in order that they were applied [1].
# To decompress, we simply do the reverse.
# [1]: https://datatracker.ietf.org/doc/html/rfc9110#name-content-encoding
decoded_response = None
for encoding in (e.strip() for e in reversed(resp.headers.get('Content-encoding', '').split(','))):
if encoding == 'gzip':
decoded_response = self.gz(decoded_response or resp.read())
elif encoding == 'deflate':
decoded_response = self.deflate(decoded_response or resp.read())
elif encoding == 'br' and brotli:
decoded_response = self.brotli(decoded_response or resp.read())
if decoded_response is not None:
resp = urllib.request.addinfourl(io.BytesIO(decoded_response), old_resp.headers, old_resp.url, old_resp.code)
resp.msg = old_resp.msg
# Percent-encode redirect URL of Location HTTP header to satisfy RFC 3986 (see
# https://github.com/ytdl-org/youtube-dl/issues/6457).
if 300 <= resp.code < 400:
location = resp.headers.get('Location')
if location:
# As of RFC 2616 default charset is iso-8859-1 that is respected by python 3
location = location.encode('iso-8859-1').decode()
location_escaped = escape_url(location)
if location != location_escaped:
del resp.headers['Location']
resp.headers['Location'] = location_escaped
return resp
https_request = http_request
https_response = http_response
def make_socks_conn_class(base_class, socks_proxy):
assert issubclass(base_class, (
http.client.HTTPConnection, http.client.HTTPSConnection))
proxy_args = make_socks_proxy_opts(socks_proxy)
class SocksConnection(base_class):
def connect(self):
self.sock = sockssocket()
self.sock.setproxy(**proxy_args)
if isinstance(self.timeout, (int, float)):
self.sock.settimeout(self.timeout)
self.sock.connect((self.host, self.port))
if isinstance(self, http.client.HTTPSConnection):
if hasattr(self, '_context'): # Python > 2.6
self.sock = self._context.wrap_socket(
self.sock, server_hostname=self.host)
else:
self.sock = ssl.wrap_socket(self.sock)
return SocksConnection
class RedirectHandler(urllib.request.HTTPRedirectHandler):
"""YoutubeDL redirect handler
The code is based on HTTPRedirectHandler implementation from CPython [1].
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://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 = urllib.request.HTTPRedirectHandler.http_error_302
def redirect_request(self, req, fp, code, msg, headers, newurl):
if code not in (301, 302, 303, 307, 308):
raise urllib.error.HTTPError(req.full_url, code, msg, headers, fp)
new_data = req.data
# Technically the Cookie header should be in unredirected_hdrs,
# however in practice some may set it in normal headers anyway.
# We will remove it here to prevent any leaks.
remove_headers = ['Cookie']
new_method = get_redirect_method(req.get_method(), code)
# 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'])
new_headers = {k: v for k, v in req.headers.items() if k.title() not in remove_headers}
return urllib.request.Request(
newurl, headers=new_headers, origin_req_host=req.origin_req_host,
unverifiable=True, method=new_method, data=new_data)
class ProxyHandler(urllib.request.ProxyHandler):
def __init__(self, proxies=None):
# Set default handlers
for type in ('http', 'https'):
setattr(self, '%s_open' % type,
lambda r, proxy='__noproxy__', type=type, meth=self.proxy_open:
meth(r, proxy, type))
urllib.request.ProxyHandler.__init__(self, proxies)
def proxy_open(self, req, proxy, type):
req_proxy = req.headers.get('Ytdl-request-proxy')
if req_proxy is not None:
proxy = req_proxy
del req.headers['Ytdl-request-proxy']
if proxy == '__noproxy__':
return None # No Proxy
if urllib.parse.urlparse(proxy).scheme.lower() in ('socks', 'socks4', 'socks4a', 'socks5'):
req.add_header('Ytdl-socks-proxy', proxy)
# yt-dlp's http/https handlers do wrapping the socket with socks
return None
return urllib.request.ProxyHandler.proxy_open(
self, req, proxy, type)
class PUTRequest(urllib.request.Request):
def get_method(self):
return 'PUT'
class HEADRequest(urllib.request.Request):
def get_method(self):
return 'HEAD'
def update_Request(req, url=None, data=None, headers=None, query=None):
req_headers = req.headers.copy()
req_headers.update(headers or {})
req_data = data or req.data
req_url = update_url_query(url or req.get_full_url(), query)
req_get_method = req.get_method()
if req_get_method == 'HEAD':
req_type = HEADRequest
elif req_get_method == 'PUT':
req_type = PUTRequest
else:
req_type = urllib.request.Request
new_req = req_type(
req_url, data=req_data, headers=req_headers,
origin_req_host=req.origin_req_host, unverifiable=req.unverifiable)
if hasattr(req, 'timeout'):
new_req.timeout = req.timeout
return new_req