mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-11-26 08:55:28 +01:00
824 lines
26 KiB
Python
824 lines
26 KiB
Python
import asyncio
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import datetime
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import io
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import re
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import socket
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import string
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import tempfile
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import types
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import warnings
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from email.utils import parsedate
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from http.cookies import SimpleCookie
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from types import MappingProxyType
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from typing import (
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TYPE_CHECKING,
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Any,
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Dict,
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Iterator,
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Mapping,
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MutableMapping,
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Optional,
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Tuple,
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Union,
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cast,
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)
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from urllib.parse import parse_qsl
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import attr
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from multidict import CIMultiDict, CIMultiDictProxy, MultiDict, MultiDictProxy
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from yarl import URL
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from . import hdrs
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from .abc import AbstractStreamWriter
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from .helpers import DEBUG, ChainMapProxy, HeadersMixin, reify, sentinel
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from .http_parser import RawRequestMessage
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from .http_writer import HttpVersion
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from .multipart import BodyPartReader, MultipartReader
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from .streams import EmptyStreamReader, StreamReader
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from .typedefs import (
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DEFAULT_JSON_DECODER,
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JSONDecoder,
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LooseHeaders,
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RawHeaders,
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StrOrURL,
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)
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from .web_exceptions import HTTPRequestEntityTooLarge
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from .web_response import StreamResponse
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__all__ = ("BaseRequest", "FileField", "Request")
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if TYPE_CHECKING: # pragma: no cover
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from .web_app import Application
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from .web_protocol import RequestHandler
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from .web_urldispatcher import UrlMappingMatchInfo
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@attr.s(auto_attribs=True, frozen=True, slots=True)
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class FileField:
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name: str
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filename: str
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file: io.BufferedReader
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content_type: str
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headers: "CIMultiDictProxy[str]"
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_TCHAR = string.digits + string.ascii_letters + r"!#$%&'*+.^_`|~-"
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# '-' at the end to prevent interpretation as range in a char class
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_TOKEN = fr"[{_TCHAR}]+"
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_QDTEXT = r"[{}]".format(
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r"".join(chr(c) for c in (0x09, 0x20, 0x21) + tuple(range(0x23, 0x7F)))
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)
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# qdtext includes 0x5C to escape 0x5D ('\]')
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# qdtext excludes obs-text (because obsoleted, and encoding not specified)
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_QUOTED_PAIR = r"\\[\t !-~]"
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_QUOTED_STRING = r'"(?:{quoted_pair}|{qdtext})*"'.format(
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qdtext=_QDTEXT, quoted_pair=_QUOTED_PAIR
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)
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_FORWARDED_PAIR = r"({token})=({token}|{quoted_string})(:\d{{1,4}})?".format(
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token=_TOKEN, quoted_string=_QUOTED_STRING
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)
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_QUOTED_PAIR_REPLACE_RE = re.compile(r"\\([\t !-~])")
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# same pattern as _QUOTED_PAIR but contains a capture group
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_FORWARDED_PAIR_RE = re.compile(_FORWARDED_PAIR)
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############################################################
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# HTTP Request
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############################################################
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class BaseRequest(MutableMapping[str, Any], HeadersMixin):
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POST_METHODS = {
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hdrs.METH_PATCH,
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hdrs.METH_POST,
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hdrs.METH_PUT,
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hdrs.METH_TRACE,
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hdrs.METH_DELETE,
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}
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ATTRS = HeadersMixin.ATTRS | frozenset(
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[
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"_message",
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"_protocol",
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"_payload_writer",
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"_payload",
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"_headers",
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"_method",
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"_version",
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"_rel_url",
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"_post",
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"_read_bytes",
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"_state",
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"_cache",
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"_task",
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"_client_max_size",
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"_loop",
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"_transport_sslcontext",
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"_transport_peername",
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]
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)
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def __init__(
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self,
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message: RawRequestMessage,
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payload: StreamReader,
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protocol: "RequestHandler",
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payload_writer: AbstractStreamWriter,
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task: "asyncio.Task[None]",
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loop: asyncio.AbstractEventLoop,
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*,
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client_max_size: int = 1024 ** 2,
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state: Optional[Dict[str, Any]] = None,
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scheme: Optional[str] = None,
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host: Optional[str] = None,
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remote: Optional[str] = None,
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) -> None:
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if state is None:
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state = {}
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self._message = message
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self._protocol = protocol
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self._payload_writer = payload_writer
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self._payload = payload
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self._headers = message.headers
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self._method = message.method
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self._version = message.version
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self._rel_url = message.url
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self._post = (
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None
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) # type: Optional[MultiDictProxy[Union[str, bytes, FileField]]]
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self._read_bytes = None # type: Optional[bytes]
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self._state = state
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self._cache = {} # type: Dict[str, Any]
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self._task = task
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self._client_max_size = client_max_size
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self._loop = loop
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transport = self._protocol.transport
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assert transport is not None
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self._transport_sslcontext = transport.get_extra_info("sslcontext")
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self._transport_peername = transport.get_extra_info("peername")
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if scheme is not None:
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self._cache["scheme"] = scheme
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if host is not None:
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self._cache["host"] = host
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if remote is not None:
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self._cache["remote"] = remote
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def clone(
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self,
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*,
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method: str = sentinel,
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rel_url: StrOrURL = sentinel,
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headers: LooseHeaders = sentinel,
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scheme: str = sentinel,
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host: str = sentinel,
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remote: str = sentinel,
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) -> "BaseRequest":
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"""Clone itself with replacement some attributes.
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Creates and returns a new instance of Request object. If no parameters
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are given, an exact copy is returned. If a parameter is not passed, it
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will reuse the one from the current request object.
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"""
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if self._read_bytes:
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raise RuntimeError("Cannot clone request " "after reading its content")
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dct = {} # type: Dict[str, Any]
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if method is not sentinel:
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dct["method"] = method
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if rel_url is not sentinel:
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new_url = URL(rel_url)
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dct["url"] = new_url
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dct["path"] = str(new_url)
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if headers is not sentinel:
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# a copy semantic
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dct["headers"] = CIMultiDictProxy(CIMultiDict(headers))
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dct["raw_headers"] = tuple(
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(k.encode("utf-8"), v.encode("utf-8")) for k, v in headers.items()
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)
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message = self._message._replace(**dct)
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kwargs = {}
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if scheme is not sentinel:
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kwargs["scheme"] = scheme
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if host is not sentinel:
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kwargs["host"] = host
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if remote is not sentinel:
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kwargs["remote"] = remote
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return self.__class__(
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message,
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self._payload,
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self._protocol,
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self._payload_writer,
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self._task,
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self._loop,
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client_max_size=self._client_max_size,
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state=self._state.copy(),
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**kwargs,
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)
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@property
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def task(self) -> "asyncio.Task[None]":
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return self._task
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@property
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def protocol(self) -> "RequestHandler":
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return self._protocol
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@property
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def transport(self) -> Optional[asyncio.Transport]:
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if self._protocol is None:
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return None
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return self._protocol.transport
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@property
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def writer(self) -> AbstractStreamWriter:
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return self._payload_writer
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@reify
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def message(self) -> RawRequestMessage:
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warnings.warn("Request.message is deprecated", DeprecationWarning, stacklevel=3)
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return self._message
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@reify
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def rel_url(self) -> URL:
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return self._rel_url
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@reify
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def loop(self) -> asyncio.AbstractEventLoop:
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warnings.warn(
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"request.loop property is deprecated", DeprecationWarning, stacklevel=2
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)
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return self._loop
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# MutableMapping API
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def __getitem__(self, key: str) -> Any:
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return self._state[key]
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def __setitem__(self, key: str, value: Any) -> None:
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self._state[key] = value
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def __delitem__(self, key: str) -> None:
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del self._state[key]
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def __len__(self) -> int:
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return len(self._state)
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def __iter__(self) -> Iterator[str]:
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return iter(self._state)
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########
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@reify
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def secure(self) -> bool:
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"""A bool indicating if the request is handled with SSL."""
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return self.scheme == "https"
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@reify
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def forwarded(self) -> Tuple[Mapping[str, str], ...]:
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"""A tuple containing all parsed Forwarded header(s).
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Makes an effort to parse Forwarded headers as specified by RFC 7239:
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- It adds one (immutable) dictionary per Forwarded 'field-value', ie
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per proxy. The element corresponds to the data in the Forwarded
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field-value added by the first proxy encountered by the client. Each
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subsequent item corresponds to those added by later proxies.
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- It checks that every value has valid syntax in general as specified
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in section 4: either a 'token' or a 'quoted-string'.
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- It un-escapes found escape sequences.
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- It does NOT validate 'by' and 'for' contents as specified in section
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6.
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- It does NOT validate 'host' contents (Host ABNF).
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- It does NOT validate 'proto' contents for valid URI scheme names.
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Returns a tuple containing one or more immutable dicts
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"""
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elems = []
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for field_value in self._message.headers.getall(hdrs.FORWARDED, ()):
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length = len(field_value)
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pos = 0
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need_separator = False
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elem = {} # type: Dict[str, str]
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elems.append(types.MappingProxyType(elem))
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while 0 <= pos < length:
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match = _FORWARDED_PAIR_RE.match(field_value, pos)
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if match is not None: # got a valid forwarded-pair
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if need_separator:
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# bad syntax here, skip to next comma
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pos = field_value.find(",", pos)
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else:
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name, value, port = match.groups()
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if value[0] == '"':
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# quoted string: remove quotes and unescape
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value = _QUOTED_PAIR_REPLACE_RE.sub(r"\1", value[1:-1])
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if port:
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value += port
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elem[name.lower()] = value
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pos += len(match.group(0))
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need_separator = True
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elif field_value[pos] == ",": # next forwarded-element
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need_separator = False
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elem = {}
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elems.append(types.MappingProxyType(elem))
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pos += 1
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elif field_value[pos] == ";": # next forwarded-pair
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need_separator = False
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pos += 1
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elif field_value[pos] in " \t":
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# Allow whitespace even between forwarded-pairs, though
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# RFC 7239 doesn't. This simplifies code and is in line
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# with Postel's law.
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pos += 1
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else:
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# bad syntax here, skip to next comma
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pos = field_value.find(",", pos)
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return tuple(elems)
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@reify
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def scheme(self) -> str:
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"""A string representing the scheme of the request.
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Hostname is resolved in this order:
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- overridden value by .clone(scheme=new_scheme) call.
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- type of connection to peer: HTTPS if socket is SSL, HTTP otherwise.
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'http' or 'https'.
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"""
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if self._transport_sslcontext:
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return "https"
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else:
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return "http"
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@reify
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def method(self) -> str:
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"""Read only property for getting HTTP method.
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The value is upper-cased str like 'GET', 'POST', 'PUT' etc.
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"""
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return self._method
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@reify
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def version(self) -> HttpVersion:
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"""Read only property for getting HTTP version of request.
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Returns aiohttp.protocol.HttpVersion instance.
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"""
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return self._version
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@reify
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def host(self) -> str:
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"""Hostname of the request.
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Hostname is resolved in this order:
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- overridden value by .clone(host=new_host) call.
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- HOST HTTP header
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- socket.getfqdn() value
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"""
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host = self._message.headers.get(hdrs.HOST)
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if host is not None:
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return host
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else:
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return socket.getfqdn()
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@reify
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def remote(self) -> Optional[str]:
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"""Remote IP of client initiated HTTP request.
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The IP is resolved in this order:
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- overridden value by .clone(remote=new_remote) call.
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- peername of opened socket
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"""
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if isinstance(self._transport_peername, (list, tuple)):
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return self._transport_peername[0]
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else:
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return self._transport_peername
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@reify
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def url(self) -> URL:
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url = URL.build(scheme=self.scheme, host=self.host)
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return url.join(self._rel_url)
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@reify
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def path(self) -> str:
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"""The URL including *PATH INFO* without the host or scheme.
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E.g., ``/app/blog``
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"""
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return self._rel_url.path
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@reify
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def path_qs(self) -> str:
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"""The URL including PATH_INFO and the query string.
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|
E.g, /app/blog?id=10
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"""
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return str(self._rel_url)
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|
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@reify
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def raw_path(self) -> str:
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"""The URL including raw *PATH INFO* without the host or scheme.
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Warning, the path is unquoted and may contains non valid URL characters
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|
E.g., ``/my%2Fpath%7Cwith%21some%25strange%24characters``
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"""
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return self._message.path
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|
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@reify
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def query(self) -> "MultiDictProxy[str]":
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"""A multidict with all the variables in the query string."""
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return self._rel_url.query
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|
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@reify
|
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def query_string(self) -> str:
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"""The query string in the URL.
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|
E.g., id=10
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"""
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return self._rel_url.query_string
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|
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@reify
|
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def headers(self) -> "CIMultiDictProxy[str]":
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"""A case-insensitive multidict proxy with all headers."""
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return self._headers
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|
|
@reify
|
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def raw_headers(self) -> RawHeaders:
|
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"""A sequence of pairs for all headers."""
|
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return self._message.raw_headers
|
|
|
|
@staticmethod
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def _http_date(_date_str: Optional[str]) -> Optional[datetime.datetime]:
|
|
"""Process a date string, return a datetime object"""
|
|
if _date_str is not None:
|
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timetuple = parsedate(_date_str)
|
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if timetuple is not None:
|
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return datetime.datetime(*timetuple[:6], tzinfo=datetime.timezone.utc)
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return None
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|
|
@reify
|
|
def if_modified_since(self) -> Optional[datetime.datetime]:
|
|
"""The value of If-Modified-Since HTTP header, or None.
|
|
|
|
This header is represented as a `datetime` object.
|
|
"""
|
|
return self._http_date(self.headers.get(hdrs.IF_MODIFIED_SINCE))
|
|
|
|
@reify
|
|
def if_unmodified_since(self) -> Optional[datetime.datetime]:
|
|
"""The value of If-Unmodified-Since HTTP header, or None.
|
|
|
|
This header is represented as a `datetime` object.
|
|
"""
|
|
return self._http_date(self.headers.get(hdrs.IF_UNMODIFIED_SINCE))
|
|
|
|
@reify
|
|
def if_range(self) -> Optional[datetime.datetime]:
|
|
"""The value of If-Range HTTP header, or None.
|
|
|
|
This header is represented as a `datetime` object.
|
|
"""
|
|
return self._http_date(self.headers.get(hdrs.IF_RANGE))
|
|
|
|
@reify
|
|
def keep_alive(self) -> bool:
|
|
"""Is keepalive enabled by client?"""
|
|
return not self._message.should_close
|
|
|
|
@reify
|
|
def cookies(self) -> Mapping[str, str]:
|
|
"""Return request cookies.
|
|
|
|
A read-only dictionary-like object.
|
|
"""
|
|
raw = self.headers.get(hdrs.COOKIE, "")
|
|
parsed = SimpleCookie(raw) # type: SimpleCookie[str]
|
|
return MappingProxyType({key: val.value for key, val in parsed.items()})
|
|
|
|
@reify
|
|
def http_range(self) -> slice:
|
|
"""The content of Range HTTP header.
|
|
|
|
Return a slice instance.
|
|
|
|
"""
|
|
rng = self._headers.get(hdrs.RANGE)
|
|
start, end = None, None
|
|
if rng is not None:
|
|
try:
|
|
pattern = r"^bytes=(\d*)-(\d*)$"
|
|
start, end = re.findall(pattern, rng)[0]
|
|
except IndexError: # pattern was not found in header
|
|
raise ValueError("range not in acceptable format")
|
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|
|
end = int(end) if end else None
|
|
start = int(start) if start else None
|
|
|
|
if start is None and end is not None:
|
|
# end with no start is to return tail of content
|
|
start = -end
|
|
end = None
|
|
|
|
if start is not None and end is not None:
|
|
# end is inclusive in range header, exclusive for slice
|
|
end += 1
|
|
|
|
if start >= end:
|
|
raise ValueError("start cannot be after end")
|
|
|
|
if start is end is None: # No valid range supplied
|
|
raise ValueError("No start or end of range specified")
|
|
|
|
return slice(start, end, 1)
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|
|
|
@reify
|
|
def content(self) -> StreamReader:
|
|
"""Return raw payload stream."""
|
|
return self._payload
|
|
|
|
@property
|
|
def has_body(self) -> bool:
|
|
"""Return True if request's HTTP BODY can be read, False otherwise."""
|
|
warnings.warn(
|
|
"Deprecated, use .can_read_body #2005", DeprecationWarning, stacklevel=2
|
|
)
|
|
return not self._payload.at_eof()
|
|
|
|
@property
|
|
def can_read_body(self) -> bool:
|
|
"""Return True if request's HTTP BODY can be read, False otherwise."""
|
|
return not self._payload.at_eof()
|
|
|
|
@reify
|
|
def body_exists(self) -> bool:
|
|
"""Return True if request has HTTP BODY, False otherwise."""
|
|
return type(self._payload) is not EmptyStreamReader
|
|
|
|
async def release(self) -> None:
|
|
"""Release request.
|
|
|
|
Eat unread part of HTTP BODY if present.
|
|
"""
|
|
while not self._payload.at_eof():
|
|
await self._payload.readany()
|
|
|
|
async def read(self) -> bytes:
|
|
"""Read request body if present.
|
|
|
|
Returns bytes object with full request content.
|
|
"""
|
|
if self._read_bytes is None:
|
|
body = bytearray()
|
|
while True:
|
|
chunk = await self._payload.readany()
|
|
body.extend(chunk)
|
|
if self._client_max_size:
|
|
body_size = len(body)
|
|
if body_size >= self._client_max_size:
|
|
raise HTTPRequestEntityTooLarge(
|
|
max_size=self._client_max_size, actual_size=body_size
|
|
)
|
|
if not chunk:
|
|
break
|
|
self._read_bytes = bytes(body)
|
|
return self._read_bytes
|
|
|
|
async def text(self) -> str:
|
|
"""Return BODY as text using encoding from .charset."""
|
|
bytes_body = await self.read()
|
|
encoding = self.charset or "utf-8"
|
|
return bytes_body.decode(encoding)
|
|
|
|
async def json(self, *, loads: JSONDecoder = DEFAULT_JSON_DECODER) -> Any:
|
|
"""Return BODY as JSON."""
|
|
body = await self.text()
|
|
return loads(body)
|
|
|
|
async def multipart(self) -> MultipartReader:
|
|
"""Return async iterator to process BODY as multipart."""
|
|
return MultipartReader(self._headers, self._payload)
|
|
|
|
async def post(self) -> "MultiDictProxy[Union[str, bytes, FileField]]":
|
|
"""Return POST parameters."""
|
|
if self._post is not None:
|
|
return self._post
|
|
if self._method not in self.POST_METHODS:
|
|
self._post = MultiDictProxy(MultiDict())
|
|
return self._post
|
|
|
|
content_type = self.content_type
|
|
if content_type not in (
|
|
"",
|
|
"application/x-www-form-urlencoded",
|
|
"multipart/form-data",
|
|
):
|
|
self._post = MultiDictProxy(MultiDict())
|
|
return self._post
|
|
|
|
out = MultiDict() # type: MultiDict[Union[str, bytes, FileField]]
|
|
|
|
if content_type == "multipart/form-data":
|
|
multipart = await self.multipart()
|
|
max_size = self._client_max_size
|
|
|
|
field = await multipart.next()
|
|
while field is not None:
|
|
size = 0
|
|
field_ct = field.headers.get(hdrs.CONTENT_TYPE)
|
|
|
|
if isinstance(field, BodyPartReader):
|
|
assert field.name is not None
|
|
|
|
# Note that according to RFC 7578, the Content-Type header
|
|
# is optional, even for files, so we can't assume it's
|
|
# present.
|
|
# https://tools.ietf.org/html/rfc7578#section-4.4
|
|
if field.filename:
|
|
# store file in temp file
|
|
tmp = tempfile.TemporaryFile()
|
|
chunk = await field.read_chunk(size=2 ** 16)
|
|
while chunk:
|
|
chunk = field.decode(chunk)
|
|
tmp.write(chunk)
|
|
size += len(chunk)
|
|
if 0 < max_size < size:
|
|
raise HTTPRequestEntityTooLarge(
|
|
max_size=max_size, actual_size=size
|
|
)
|
|
chunk = await field.read_chunk(size=2 ** 16)
|
|
tmp.seek(0)
|
|
|
|
if field_ct is None:
|
|
field_ct = "application/octet-stream"
|
|
|
|
ff = FileField(
|
|
field.name,
|
|
field.filename,
|
|
cast(io.BufferedReader, tmp),
|
|
field_ct,
|
|
field.headers,
|
|
)
|
|
out.add(field.name, ff)
|
|
else:
|
|
# deal with ordinary data
|
|
value = await field.read(decode=True)
|
|
if field_ct is None or field_ct.startswith("text/"):
|
|
charset = field.get_charset(default="utf-8")
|
|
out.add(field.name, value.decode(charset))
|
|
else:
|
|
out.add(field.name, value)
|
|
size += len(value)
|
|
if 0 < max_size < size:
|
|
raise HTTPRequestEntityTooLarge(
|
|
max_size=max_size, actual_size=size
|
|
)
|
|
else:
|
|
raise ValueError(
|
|
"To decode nested multipart you need " "to use custom reader",
|
|
)
|
|
|
|
field = await multipart.next()
|
|
else:
|
|
data = await self.read()
|
|
if data:
|
|
charset = self.charset or "utf-8"
|
|
out.extend(
|
|
parse_qsl(
|
|
data.rstrip().decode(charset),
|
|
keep_blank_values=True,
|
|
encoding=charset,
|
|
)
|
|
)
|
|
|
|
self._post = MultiDictProxy(out)
|
|
return self._post
|
|
|
|
def get_extra_info(self, name: str, default: Any = None) -> Any:
|
|
"""Extra info from protocol transport"""
|
|
protocol = self._protocol
|
|
if protocol is None:
|
|
return default
|
|
|
|
transport = protocol.transport
|
|
if transport is None:
|
|
return default
|
|
|
|
return transport.get_extra_info(name, default)
|
|
|
|
def __repr__(self) -> str:
|
|
ascii_encodable_path = self.path.encode("ascii", "backslashreplace").decode(
|
|
"ascii"
|
|
)
|
|
return "<{} {} {} >".format(
|
|
self.__class__.__name__, self._method, ascii_encodable_path
|
|
)
|
|
|
|
def __eq__(self, other: object) -> bool:
|
|
return id(self) == id(other)
|
|
|
|
def __bool__(self) -> bool:
|
|
return True
|
|
|
|
async def _prepare_hook(self, response: StreamResponse) -> None:
|
|
return
|
|
|
|
def _cancel(self, exc: BaseException) -> None:
|
|
self._payload.set_exception(exc)
|
|
|
|
|
|
class Request(BaseRequest):
|
|
|
|
ATTRS = BaseRequest.ATTRS | frozenset(["_match_info"])
|
|
|
|
def __init__(self, *args: Any, **kwargs: Any) -> None:
|
|
super().__init__(*args, **kwargs)
|
|
|
|
# matchdict, route_name, handler
|
|
# or information about traversal lookup
|
|
|
|
# initialized after route resolving
|
|
self._match_info = None # type: Optional[UrlMappingMatchInfo]
|
|
|
|
if DEBUG:
|
|
|
|
def __setattr__(self, name: str, val: Any) -> None:
|
|
if name not in self.ATTRS:
|
|
warnings.warn(
|
|
"Setting custom {}.{} attribute "
|
|
"is discouraged".format(self.__class__.__name__, name),
|
|
DeprecationWarning,
|
|
stacklevel=2,
|
|
)
|
|
super().__setattr__(name, val)
|
|
|
|
def clone(
|
|
self,
|
|
*,
|
|
method: str = sentinel,
|
|
rel_url: StrOrURL = sentinel,
|
|
headers: LooseHeaders = sentinel,
|
|
scheme: str = sentinel,
|
|
host: str = sentinel,
|
|
remote: str = sentinel,
|
|
) -> "Request":
|
|
ret = super().clone(
|
|
method=method,
|
|
rel_url=rel_url,
|
|
headers=headers,
|
|
scheme=scheme,
|
|
host=host,
|
|
remote=remote,
|
|
)
|
|
new_ret = cast(Request, ret)
|
|
new_ret._match_info = self._match_info
|
|
return new_ret
|
|
|
|
@reify
|
|
def match_info(self) -> "UrlMappingMatchInfo":
|
|
"""Result of route resolving."""
|
|
match_info = self._match_info
|
|
assert match_info is not None
|
|
return match_info
|
|
|
|
@property
|
|
def app(self) -> "Application":
|
|
"""Application instance."""
|
|
match_info = self._match_info
|
|
assert match_info is not None
|
|
return match_info.current_app
|
|
|
|
@property
|
|
def config_dict(self) -> ChainMapProxy:
|
|
match_info = self._match_info
|
|
assert match_info is not None
|
|
lst = match_info.apps
|
|
app = self.app
|
|
idx = lst.index(app)
|
|
sublist = list(reversed(lst[: idx + 1]))
|
|
return ChainMapProxy(sublist)
|
|
|
|
async def _prepare_hook(self, response: StreamResponse) -> None:
|
|
match_info = self._match_info
|
|
if match_info is None:
|
|
return
|
|
for app in match_info._apps:
|
|
await app.on_response_prepare.send(self, response)
|