mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-12-21 10:47:48 +01:00
576 lines
21 KiB
Python
576 lines
21 KiB
Python
from __future__ import annotations
|
|
|
|
import abc
|
|
import copy
|
|
import enum
|
|
import functools
|
|
import io
|
|
import typing
|
|
import urllib.parse
|
|
import urllib.request
|
|
import urllib.response
|
|
from collections.abc import Iterable, Mapping
|
|
from email.message import Message
|
|
from http import HTTPStatus
|
|
|
|
from ._helper import make_ssl_context, wrap_request_errors
|
|
from .exceptions import (
|
|
NoSupportingHandlers,
|
|
RequestError,
|
|
TransportError,
|
|
UnsupportedRequest,
|
|
)
|
|
from ..compat.types import NoneType
|
|
from ..cookies import YoutubeDLCookieJar
|
|
from ..utils import (
|
|
bug_reports_message,
|
|
classproperty,
|
|
deprecation_warning,
|
|
error_to_str,
|
|
update_url_query,
|
|
)
|
|
from ..utils.networking import HTTPHeaderDict, normalize_url
|
|
|
|
|
|
def register_preference(*handlers: type[RequestHandler]):
|
|
assert all(issubclass(handler, RequestHandler) for handler in handlers)
|
|
|
|
def outer(preference: Preference):
|
|
@functools.wraps(preference)
|
|
def inner(handler, *args, **kwargs):
|
|
if not handlers or isinstance(handler, handlers):
|
|
return preference(handler, *args, **kwargs)
|
|
return 0
|
|
_RH_PREFERENCES.add(inner)
|
|
return inner
|
|
return outer
|
|
|
|
|
|
class RequestDirector:
|
|
"""RequestDirector class
|
|
|
|
Helper class that, when given a request, forward it to a RequestHandler that supports it.
|
|
|
|
Preference functions in the form of func(handler, request) -> int
|
|
can be registered into the `preferences` set. These are used to sort handlers
|
|
in order of preference.
|
|
|
|
@param logger: Logger instance.
|
|
@param verbose: Print debug request information to stdout.
|
|
"""
|
|
|
|
def __init__(self, logger, verbose=False):
|
|
self.handlers: dict[str, RequestHandler] = {}
|
|
self.preferences: set[Preference] = set()
|
|
self.logger = logger # TODO(Grub4k): default logger
|
|
self.verbose = verbose
|
|
|
|
def close(self):
|
|
for handler in self.handlers.values():
|
|
handler.close()
|
|
self.handlers.clear()
|
|
|
|
def add_handler(self, handler: RequestHandler):
|
|
"""Add a handler. If a handler of the same RH_KEY exists, it will overwrite it"""
|
|
assert isinstance(handler, RequestHandler), 'handler must be a RequestHandler'
|
|
self.handlers[handler.RH_KEY] = handler
|
|
|
|
def _get_handlers(self, request: Request) -> list[RequestHandler]:
|
|
"""Sorts handlers by preference, given a request"""
|
|
preferences = {
|
|
rh: sum(pref(rh, request) for pref in self.preferences)
|
|
for rh in self.handlers.values()
|
|
}
|
|
self._print_verbose('Handler preferences for this request: %s' % ', '.join(
|
|
f'{rh.RH_NAME}={pref}' for rh, pref in preferences.items()))
|
|
return sorted(self.handlers.values(), key=preferences.get, reverse=True)
|
|
|
|
def _print_verbose(self, msg):
|
|
if self.verbose:
|
|
self.logger.stdout(f'director: {msg}')
|
|
|
|
def send(self, request: Request) -> Response:
|
|
"""
|
|
Passes a request onto a suitable RequestHandler
|
|
"""
|
|
if not self.handlers:
|
|
raise RequestError('No request handlers configured')
|
|
|
|
assert isinstance(request, Request)
|
|
|
|
unexpected_errors = []
|
|
unsupported_errors = []
|
|
for handler in self._get_handlers(request):
|
|
self._print_verbose(f'Checking if "{handler.RH_NAME}" supports this request.')
|
|
try:
|
|
handler.validate(request)
|
|
except UnsupportedRequest as e:
|
|
self._print_verbose(
|
|
f'"{handler.RH_NAME}" cannot handle this request (reason: {error_to_str(e)})')
|
|
unsupported_errors.append(e)
|
|
continue
|
|
|
|
self._print_verbose(f'Sending request via "{handler.RH_NAME}"')
|
|
try:
|
|
response = handler.send(request)
|
|
except RequestError:
|
|
raise
|
|
except Exception as e:
|
|
self.logger.error(
|
|
f'[{handler.RH_NAME}] Unexpected error: {error_to_str(e)}{bug_reports_message()}',
|
|
is_error=False)
|
|
unexpected_errors.append(e)
|
|
continue
|
|
|
|
assert isinstance(response, Response)
|
|
return response
|
|
|
|
raise NoSupportingHandlers(unsupported_errors, unexpected_errors)
|
|
|
|
|
|
_REQUEST_HANDLERS = {}
|
|
|
|
|
|
def register_rh(handler):
|
|
"""Register a RequestHandler class"""
|
|
assert issubclass(handler, RequestHandler), f'{handler} must be a subclass of RequestHandler'
|
|
assert handler.RH_KEY not in _REQUEST_HANDLERS, f'RequestHandler {handler.RH_KEY} already registered'
|
|
_REQUEST_HANDLERS[handler.RH_KEY] = handler
|
|
return handler
|
|
|
|
|
|
class Features(enum.Enum):
|
|
ALL_PROXY = enum.auto()
|
|
NO_PROXY = enum.auto()
|
|
|
|
|
|
class RequestHandler(abc.ABC):
|
|
|
|
"""Request Handler class
|
|
|
|
Request handlers are class that, given a Request,
|
|
process the request from start to finish and return a Response.
|
|
|
|
Concrete subclasses need to redefine the _send(request) method,
|
|
which handles the underlying request logic and returns a Response.
|
|
|
|
RH_NAME class variable may contain a display name for the RequestHandler.
|
|
By default, this is generated from the class name.
|
|
|
|
The concrete request handler MUST have "RH" as the suffix in the class name.
|
|
|
|
All exceptions raised by a RequestHandler should be an instance of RequestError.
|
|
Any other exception raised will be treated as a handler issue.
|
|
|
|
If a Request is not supported by the handler, an UnsupportedRequest
|
|
should be raised with a reason.
|
|
|
|
By default, some checks are done on the request in _validate() based on the following class variables:
|
|
- `_SUPPORTED_URL_SCHEMES`: a tuple of supported url schemes.
|
|
Any Request with an url scheme not in this list will raise an UnsupportedRequest.
|
|
|
|
- `_SUPPORTED_PROXY_SCHEMES`: a tuple of support proxy url schemes. Any Request that contains
|
|
a proxy url with an url scheme not in this list will raise an UnsupportedRequest.
|
|
|
|
- `_SUPPORTED_FEATURES`: a tuple of supported features, as defined in Features enum.
|
|
|
|
The above may be set to None to disable the checks.
|
|
|
|
Parameters:
|
|
@param logger: logger instance
|
|
@param headers: HTTP Headers to include when sending requests.
|
|
@param cookiejar: Cookiejar to use for requests.
|
|
@param timeout: Socket timeout to use when sending requests.
|
|
@param proxies: Proxies to use for sending requests.
|
|
@param source_address: Client-side IP address to bind to for requests.
|
|
@param verbose: Print debug request and traffic information to stdout.
|
|
@param prefer_system_certs: Whether to prefer system certificates over other means (e.g. certifi).
|
|
@param client_cert: SSL client certificate configuration.
|
|
dict with {client_certificate, client_certificate_key, client_certificate_password}
|
|
@param verify: Verify SSL certificates
|
|
@param legacy_ssl_support: Enable legacy SSL options such as legacy server connect and older cipher support.
|
|
|
|
Some configuration options may be available for individual Requests too. In this case,
|
|
either the Request configuration option takes precedence or they are merged.
|
|
|
|
Requests may have additional optional parameters defined as extensions.
|
|
RequestHandler subclasses may choose to support custom extensions.
|
|
|
|
If an extension is supported, subclasses should extend _check_extensions(extensions)
|
|
to pop and validate the extension.
|
|
- Extensions left in `extensions` are treated as unsupported and UnsupportedRequest will be raised.
|
|
|
|
The following extensions are defined for RequestHandler:
|
|
- `cookiejar`: Cookiejar to use for this request.
|
|
- `timeout`: socket timeout to use for this request.
|
|
To enable these, add extensions.pop('<extension>', None) to _check_extensions
|
|
|
|
Apart from the url protocol, proxies dict may contain the following keys:
|
|
- `all`: proxy to use for all protocols. Used as a fallback if no proxy is set for a specific protocol.
|
|
- `no`: comma seperated list of hostnames (optionally with port) to not use a proxy for.
|
|
Note: a RequestHandler may not support these, as defined in `_SUPPORTED_FEATURES`.
|
|
|
|
"""
|
|
|
|
_SUPPORTED_URL_SCHEMES = ()
|
|
_SUPPORTED_PROXY_SCHEMES = ()
|
|
_SUPPORTED_FEATURES = ()
|
|
|
|
def __init__(
|
|
self, *,
|
|
logger, # TODO(Grub4k): default logger
|
|
headers: HTTPHeaderDict = None,
|
|
cookiejar: YoutubeDLCookieJar = None,
|
|
timeout: float | int | None = None,
|
|
proxies: dict = None,
|
|
source_address: str = None,
|
|
verbose: bool = False,
|
|
prefer_system_certs: bool = False,
|
|
client_cert: dict[str, str | None] = None,
|
|
verify: bool = True,
|
|
legacy_ssl_support: bool = False,
|
|
**_,
|
|
):
|
|
|
|
self._logger = logger
|
|
self.headers = headers or {}
|
|
self.cookiejar = cookiejar if cookiejar is not None else YoutubeDLCookieJar()
|
|
self.timeout = float(timeout or 20)
|
|
self.proxies = proxies or {}
|
|
self.source_address = source_address
|
|
self.verbose = verbose
|
|
self.prefer_system_certs = prefer_system_certs
|
|
self._client_cert = client_cert or {}
|
|
self.verify = verify
|
|
self.legacy_ssl_support = legacy_ssl_support
|
|
super().__init__()
|
|
|
|
def _make_sslcontext(self):
|
|
return make_ssl_context(
|
|
verify=self.verify,
|
|
legacy_support=self.legacy_ssl_support,
|
|
use_certifi=not self.prefer_system_certs,
|
|
**self._client_cert,
|
|
)
|
|
|
|
def _merge_headers(self, request_headers):
|
|
return HTTPHeaderDict(self.headers, request_headers)
|
|
|
|
def _calculate_timeout(self, request):
|
|
return float(request.extensions.get('timeout') or self.timeout)
|
|
|
|
def _get_cookiejar(self, request):
|
|
return request.extensions.get('cookiejar') or self.cookiejar
|
|
|
|
def _get_proxies(self, request):
|
|
return (request.proxies or self.proxies).copy()
|
|
|
|
def _check_url_scheme(self, request: Request):
|
|
scheme = urllib.parse.urlparse(request.url).scheme.lower()
|
|
if self._SUPPORTED_URL_SCHEMES is not None and scheme not in self._SUPPORTED_URL_SCHEMES:
|
|
raise UnsupportedRequest(f'Unsupported url scheme: "{scheme}"')
|
|
return scheme # for further processing
|
|
|
|
def _check_proxies(self, proxies):
|
|
for proxy_key, proxy_url in proxies.items():
|
|
if proxy_url is None:
|
|
continue
|
|
if proxy_key == 'no':
|
|
if self._SUPPORTED_FEATURES is not None and Features.NO_PROXY not in self._SUPPORTED_FEATURES:
|
|
raise UnsupportedRequest('"no" proxy is not supported')
|
|
continue
|
|
if (
|
|
proxy_key == 'all'
|
|
and self._SUPPORTED_FEATURES is not None
|
|
and Features.ALL_PROXY not in self._SUPPORTED_FEATURES
|
|
):
|
|
raise UnsupportedRequest('"all" proxy is not supported')
|
|
|
|
# Unlikely this handler will use this proxy, so ignore.
|
|
# This is to allow a case where a proxy may be set for a protocol
|
|
# for one handler in which such protocol (and proxy) is not supported by another handler.
|
|
if self._SUPPORTED_URL_SCHEMES is not None and proxy_key not in (*self._SUPPORTED_URL_SCHEMES, 'all'):
|
|
continue
|
|
|
|
if self._SUPPORTED_PROXY_SCHEMES is None:
|
|
# Skip proxy scheme checks
|
|
continue
|
|
|
|
try:
|
|
if urllib.request._parse_proxy(proxy_url)[0] is None:
|
|
# Scheme-less proxies are not supported
|
|
raise UnsupportedRequest(f'Proxy "{proxy_url}" missing scheme')
|
|
except ValueError as e:
|
|
# parse_proxy may raise on some invalid proxy urls such as "/a/b/c"
|
|
raise UnsupportedRequest(f'Invalid proxy url "{proxy_url}": {e}')
|
|
|
|
scheme = urllib.parse.urlparse(proxy_url).scheme.lower()
|
|
if scheme not in self._SUPPORTED_PROXY_SCHEMES:
|
|
raise UnsupportedRequest(f'Unsupported proxy type: "{scheme}"')
|
|
|
|
def _check_extensions(self, extensions):
|
|
"""Check extensions for unsupported extensions. Subclasses should extend this."""
|
|
assert isinstance(extensions.get('cookiejar'), (YoutubeDLCookieJar, NoneType))
|
|
assert isinstance(extensions.get('timeout'), (float, int, NoneType))
|
|
|
|
def _validate(self, request):
|
|
self._check_url_scheme(request)
|
|
self._check_proxies(request.proxies or self.proxies)
|
|
extensions = request.extensions.copy()
|
|
self._check_extensions(extensions)
|
|
if extensions:
|
|
# TODO: add support for optional extensions
|
|
raise UnsupportedRequest(f'Unsupported extensions: {", ".join(extensions.keys())}')
|
|
|
|
@wrap_request_errors
|
|
def validate(self, request: Request):
|
|
if not isinstance(request, Request):
|
|
raise TypeError('Expected an instance of Request')
|
|
self._validate(request)
|
|
|
|
@wrap_request_errors
|
|
def send(self, request: Request) -> Response:
|
|
if not isinstance(request, Request):
|
|
raise TypeError('Expected an instance of Request')
|
|
return self._send(request)
|
|
|
|
@abc.abstractmethod
|
|
def _send(self, request: Request):
|
|
"""Handle a request from start to finish. Redefine in subclasses."""
|
|
pass
|
|
|
|
def close(self):
|
|
pass
|
|
|
|
@classproperty
|
|
def RH_NAME(cls):
|
|
return cls.__name__[:-2]
|
|
|
|
@classproperty
|
|
def RH_KEY(cls):
|
|
assert cls.__name__.endswith('RH'), 'RequestHandler class names must end with "RH"'
|
|
return cls.__name__[:-2]
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, *args):
|
|
self.close()
|
|
|
|
|
|
class Request:
|
|
"""
|
|
Represents a request to be made.
|
|
Partially backwards-compatible with urllib.request.Request.
|
|
|
|
@param url: url to send. Will be sanitized.
|
|
@param data: payload data to send. Must be bytes, iterable of bytes, a file-like object or None
|
|
@param headers: headers to send.
|
|
@param proxies: proxy dict mapping of proto:proxy to use for the request and any redirects.
|
|
@param query: URL query parameters to update the url with.
|
|
@param method: HTTP method to use. If no method specified, will use POST if payload data is present else GET
|
|
@param extensions: Dictionary of Request extensions to add, as supported by handlers.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
url: str,
|
|
data: RequestData = None,
|
|
headers: typing.Mapping = None,
|
|
proxies: dict = None,
|
|
query: dict = None,
|
|
method: str = None,
|
|
extensions: dict = None
|
|
):
|
|
|
|
self._headers = HTTPHeaderDict()
|
|
self._data = None
|
|
|
|
if query:
|
|
url = update_url_query(url, query)
|
|
|
|
self.url = url
|
|
self.method = method
|
|
if headers:
|
|
self.headers = headers
|
|
self.data = data # note: must be done after setting headers
|
|
self.proxies = proxies or {}
|
|
self.extensions = extensions or {}
|
|
|
|
@property
|
|
def url(self):
|
|
return self._url
|
|
|
|
@url.setter
|
|
def url(self, url):
|
|
if not isinstance(url, str):
|
|
raise TypeError('url must be a string')
|
|
elif url.startswith('//'):
|
|
url = 'http:' + url
|
|
self._url = normalize_url(url)
|
|
|
|
@property
|
|
def method(self):
|
|
return self._method or ('POST' if self.data is not None else 'GET')
|
|
|
|
@method.setter
|
|
def method(self, method):
|
|
if method is None:
|
|
self._method = None
|
|
elif isinstance(method, str):
|
|
self._method = method.upper()
|
|
else:
|
|
raise TypeError('method must be a string')
|
|
|
|
@property
|
|
def data(self):
|
|
return self._data
|
|
|
|
@data.setter
|
|
def data(self, data: RequestData):
|
|
# Try catch some common mistakes
|
|
if data is not None and (
|
|
not isinstance(data, (bytes, io.IOBase, Iterable)) or isinstance(data, (str, Mapping))
|
|
):
|
|
raise TypeError('data must be bytes, iterable of bytes, or a file-like object')
|
|
|
|
if data == self._data and self._data is None:
|
|
self.headers.pop('Content-Length', None)
|
|
|
|
# https://docs.python.org/3/library/urllib.request.html#urllib.request.Request.data
|
|
if data != self._data:
|
|
if self._data is not None:
|
|
self.headers.pop('Content-Length', None)
|
|
self._data = data
|
|
|
|
if self._data is None:
|
|
self.headers.pop('Content-Type', None)
|
|
|
|
if 'Content-Type' not in self.headers and self._data is not None:
|
|
self.headers['Content-Type'] = 'application/x-www-form-urlencoded'
|
|
|
|
@property
|
|
def headers(self) -> HTTPHeaderDict:
|
|
return self._headers
|
|
|
|
@headers.setter
|
|
def headers(self, new_headers: Mapping):
|
|
"""Replaces headers of the request. If not a HTTPHeaderDict, it will be converted to one."""
|
|
if isinstance(new_headers, HTTPHeaderDict):
|
|
self._headers = new_headers
|
|
elif isinstance(new_headers, Mapping):
|
|
self._headers = HTTPHeaderDict(new_headers)
|
|
else:
|
|
raise TypeError('headers must be a mapping')
|
|
|
|
def update(self, url=None, data=None, headers=None, query=None, extensions=None):
|
|
self.data = data if data is not None else self.data
|
|
self.headers.update(headers or {})
|
|
self.extensions.update(extensions or {})
|
|
self.url = update_url_query(url or self.url, query or {})
|
|
|
|
def copy(self):
|
|
return self.__class__(
|
|
url=self.url,
|
|
headers=copy.deepcopy(self.headers),
|
|
proxies=copy.deepcopy(self.proxies),
|
|
data=self._data,
|
|
extensions=copy.copy(self.extensions),
|
|
method=self._method,
|
|
)
|
|
|
|
|
|
HEADRequest = functools.partial(Request, method='HEAD')
|
|
PUTRequest = functools.partial(Request, method='PUT')
|
|
|
|
|
|
class Response(io.IOBase):
|
|
"""
|
|
Base class for HTTP response adapters.
|
|
|
|
By default, it provides a basic wrapper for a file-like response object.
|
|
|
|
Interface partially backwards-compatible with addinfourl and http.client.HTTPResponse.
|
|
|
|
@param fp: Original, file-like, response.
|
|
@param url: URL that this is a response of.
|
|
@param headers: response headers.
|
|
@param status: Response HTTP status code. Default is 200 OK.
|
|
@param reason: HTTP status reason. Will use built-in reasons based on status code if not provided.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
fp: io.IOBase,
|
|
url: str,
|
|
headers: Mapping[str, str],
|
|
status: int = 200,
|
|
reason: str = None):
|
|
|
|
self.fp = fp
|
|
self.headers = Message()
|
|
for name, value in headers.items():
|
|
self.headers.add_header(name, value)
|
|
self.status = status
|
|
self.url = url
|
|
try:
|
|
self.reason = reason or HTTPStatus(status).phrase
|
|
except ValueError:
|
|
self.reason = None
|
|
|
|
def readable(self):
|
|
return self.fp.readable()
|
|
|
|
def read(self, amt: int = None) -> bytes:
|
|
# Expected errors raised here should be of type RequestError or subclasses.
|
|
# Subclasses should redefine this method with more precise error handling.
|
|
try:
|
|
return self.fp.read(amt)
|
|
except Exception as e:
|
|
raise TransportError(cause=e) from e
|
|
|
|
def close(self):
|
|
self.fp.close()
|
|
return super().close()
|
|
|
|
def get_header(self, name, default=None):
|
|
"""Get header for name.
|
|
If there are multiple matching headers, return all seperated by comma."""
|
|
headers = self.headers.get_all(name)
|
|
if not headers:
|
|
return default
|
|
if name.title() == 'Set-Cookie':
|
|
# Special case, only get the first one
|
|
# https://www.rfc-editor.org/rfc/rfc9110.html#section-5.3-4.1
|
|
return headers[0]
|
|
return ', '.join(headers)
|
|
|
|
# The following methods are for compatability reasons and are deprecated
|
|
@property
|
|
def code(self):
|
|
deprecation_warning('Response.code is deprecated, use Response.status', stacklevel=2)
|
|
return self.status
|
|
|
|
def getcode(self):
|
|
deprecation_warning('Response.getcode() is deprecated, use Response.status', stacklevel=2)
|
|
return self.status
|
|
|
|
def geturl(self):
|
|
deprecation_warning('Response.geturl() is deprecated, use Response.url', stacklevel=2)
|
|
return self.url
|
|
|
|
def info(self):
|
|
deprecation_warning('Response.info() is deprecated, use Response.headers', stacklevel=2)
|
|
return self.headers
|
|
|
|
def getheader(self, name, default=None):
|
|
deprecation_warning('Response.getheader() is deprecated, use Response.get_header', stacklevel=2)
|
|
return self.get_header(name, default)
|
|
|
|
|
|
if typing.TYPE_CHECKING:
|
|
RequestData = bytes | Iterable[bytes] | typing.IO | None
|
|
Preference = typing.Callable[[RequestHandler, Request], int]
|
|
|
|
_RH_PREFERENCES: set[Preference] = set()
|