D7net
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
usr
/
lib
/
python3
/
dist-packages
/
aiohttp
/
Filename :
web_request.py
back
Copy
import asyncio import datetime import io import re import socket import string import tempfile import types import warnings from http.cookies import SimpleCookie from types import MappingProxyType from typing import ( TYPE_CHECKING, Any, Dict, Final, Iterator, Mapping, MutableMapping, Optional, Pattern, Tuple, Union, cast, ) from urllib.parse import parse_qsl import attr from multidict import ( CIMultiDict, CIMultiDictProxy, MultiDict, MultiDictProxy, MultiMapping, ) from yarl import URL from . import hdrs from .abc import AbstractStreamWriter from .helpers import ( _SENTINEL, DEBUG, ETAG_ANY, LIST_QUOTED_ETAG_RE, ChainMapProxy, ETag, HeadersMixin, parse_http_date, reify, sentinel, ) from .http_parser import RawRequestMessage from .http_writer import HttpVersion from .multipart import BodyPartReader, MultipartReader from .streams import EmptyStreamReader, StreamReader from .typedefs import ( DEFAULT_JSON_DECODER, JSONDecoder, LooseHeaders, RawHeaders, StrOrURL, ) from .web_exceptions import HTTPRequestEntityTooLarge from .web_response import StreamResponse __all__ = ("BaseRequest", "FileField", "Request") if TYPE_CHECKING: # pragma: no cover from .web_app import Application from .web_protocol import RequestHandler from .web_urldispatcher import UrlMappingMatchInfo @attr.s(auto_attribs=True, frozen=True, slots=True) class FileField: name: str filename: str file: io.BufferedReader content_type: str headers: "CIMultiDictProxy[str]" _TCHAR: Final[str] = string.digits + string.ascii_letters + r"!#$%&'*+.^_`|~-" # '-' at the end to prevent interpretation as range in a char class _TOKEN: Final[str] = rf"[{_TCHAR}]+" _QDTEXT: Final[str] = r"[{}]".format( r"".join(chr(c) for c in (0x09, 0x20, 0x21) + tuple(range(0x23, 0x7F))) ) # qdtext includes 0x5C to escape 0x5D ('\]') # qdtext excludes obs-text (because obsoleted, and encoding not specified) _QUOTED_PAIR: Final[str] = r"\\[\t !-~]" _QUOTED_STRING: Final[str] = r'"(?:{quoted_pair}|{qdtext})*"'.format( qdtext=_QDTEXT, quoted_pair=_QUOTED_PAIR ) _FORWARDED_PAIR: Final[ str ] = r"({token})=({token}|{quoted_string})(:\d{{1,4}})?".format( token=_TOKEN, quoted_string=_QUOTED_STRING ) _QUOTED_PAIR_REPLACE_RE: Final[Pattern[str]] = re.compile(r"\\([\t !-~])") # same pattern as _QUOTED_PAIR but contains a capture group _FORWARDED_PAIR_RE: Final[Pattern[str]] = re.compile(_FORWARDED_PAIR) ############################################################ # HTTP Request ############################################################ class BaseRequest(MutableMapping[str, Any], HeadersMixin): POST_METHODS = { hdrs.METH_PATCH, hdrs.METH_POST, hdrs.METH_PUT, hdrs.METH_TRACE, hdrs.METH_DELETE, } ATTRS = HeadersMixin.ATTRS | frozenset( [ "_message", "_protocol", "_payload_writer", "_payload", "_headers", "_method", "_version", "_rel_url", "_post", "_read_bytes", "_state", "_cache", "_task", "_client_max_size", "_loop", "_transport_sslcontext", "_transport_peername", ] ) def __init__( self, message: RawRequestMessage, payload: StreamReader, protocol: "RequestHandler", payload_writer: AbstractStreamWriter, task: "asyncio.Task[None]", loop: asyncio.AbstractEventLoop, *, client_max_size: int = 1024**2, state: Optional[Dict[str, Any]] = None, scheme: Optional[str] = None, host: Optional[str] = None, remote: Optional[str] = None, ) -> None: if state is None: state = {} self._message = message self._protocol = protocol self._payload_writer = payload_writer self._payload = payload self._headers = message.headers self._method = message.method self._version = message.version self._cache: Dict[str, Any] = {} url = message.url if url.is_absolute(): # absolute URL is given, # override auto-calculating url, host, and scheme # all other properties should be good self._cache["url"] = url self._cache["host"] = url.host self._cache["scheme"] = url.scheme self._rel_url = url.relative() else: self._rel_url = message.url self._post: Optional[MultiDictProxy[Union[str, bytes, FileField]]] = None self._read_bytes: Optional[bytes] = None self._state = state self._task = task self._client_max_size = client_max_size self._loop = loop transport = self._protocol.transport assert transport is not None self._transport_sslcontext = transport.get_extra_info("sslcontext") self._transport_peername = transport.get_extra_info("peername") if scheme is not None: self._cache["scheme"] = scheme if host is not None: self._cache["host"] = host if remote is not None: self._cache["remote"] = remote def clone( self, *, method: Union[str, _SENTINEL] = sentinel, rel_url: Union[StrOrURL, _SENTINEL] = sentinel, headers: Union[LooseHeaders, _SENTINEL] = sentinel, scheme: Union[str, _SENTINEL] = sentinel, host: Union[str, _SENTINEL] = sentinel, remote: Union[str, _SENTINEL] = sentinel, client_max_size: Union[int, _SENTINEL] = sentinel, ) -> "BaseRequest": """Clone itself with replacement some attributes. Creates and returns a new instance of Request object. If no parameters are given, an exact copy is returned. If a parameter is not passed, it will reuse the one from the current request object. """ if self._read_bytes: raise RuntimeError("Cannot clone request " "after reading its content") dct: Dict[str, Any] = {} if method is not sentinel: dct["method"] = method if rel_url is not sentinel: new_url: URL = URL(rel_url) dct["url"] = new_url dct["path"] = str(new_url) if headers is not sentinel: # a copy semantic dct["headers"] = CIMultiDictProxy(CIMultiDict(headers)) dct["raw_headers"] = tuple( (k.encode("utf-8"), v.encode("utf-8")) for k, v in headers.items() ) message = self._message._replace(**dct) kwargs = {} if scheme is not sentinel: kwargs["scheme"] = scheme if host is not sentinel: kwargs["host"] = host if remote is not sentinel: kwargs["remote"] = remote if client_max_size is sentinel: client_max_size = self._client_max_size return self.__class__( message, self._payload, self._protocol, self._payload_writer, self._task, self._loop, client_max_size=client_max_size, state=self._state.copy(), **kwargs, ) @property def task(self) -> "asyncio.Task[None]": return self._task @property def protocol(self) -> "RequestHandler": return self._protocol @property def transport(self) -> Optional[asyncio.Transport]: if self._protocol is None: return None return self._protocol.transport @property def writer(self) -> AbstractStreamWriter: return self._payload_writer @property def client_max_size(self) -> int: return self._client_max_size @reify def message(self) -> RawRequestMessage: warnings.warn("Request.message is deprecated", DeprecationWarning, stacklevel=3) return self._message @reify def rel_url(self) -> URL: return self._rel_url @reify def loop(self) -> asyncio.AbstractEventLoop: warnings.warn( "request.loop property is deprecated", DeprecationWarning, stacklevel=2 ) return self._loop # MutableMapping API def __getitem__(self, key: str) -> Any: return self._state[key] def __setitem__(self, key: str, value: Any) -> None: self._state[key] = value def __delitem__(self, key: str) -> None: del self._state[key] def __len__(self) -> int: return len(self._state) def __iter__(self) -> Iterator[str]: return iter(self._state) ######## @reify def secure(self) -> bool: """A bool indicating if the request is handled with SSL.""" return self.scheme == "https" @reify def forwarded(self) -> Tuple[Mapping[str, str], ...]: """A tuple containing all parsed Forwarded header(s). Makes an effort to parse Forwarded headers as specified by RFC 7239: - It adds one (immutable) dictionary per Forwarded 'field-value', ie per proxy. The element corresponds to the data in the Forwarded field-value added by the first proxy encountered by the client. Each subsequent item corresponds to those added by later proxies. - It checks that every value has valid syntax in general as specified in section 4: either a 'token' or a 'quoted-string'. - It un-escapes found escape sequences. - It does NOT validate 'by' and 'for' contents as specified in section 6. - It does NOT validate 'host' contents (Host ABNF). - It does NOT validate 'proto' contents for valid URI scheme names. Returns a tuple containing one or more immutable dicts """ elems = [] for field_value in self._message.headers.getall(hdrs.FORWARDED, ()): length = len(field_value) pos = 0 need_separator = False elem: Dict[str, str] = {} elems.append(types.MappingProxyType(elem)) while 0 <= pos < length: match = _FORWARDED_PAIR_RE.match(field_value, pos) if match is not None: # got a valid forwarded-pair if need_separator: # bad syntax here, skip to next comma pos = field_value.find(",", pos) else: name, value, port = match.groups() if value[0] == '"': # quoted string: remove quotes and unescape value = _QUOTED_PAIR_REPLACE_RE.sub(r"\1", value[1:-1]) if port: value += port elem[name.lower()] = value pos += len(match.group(0)) need_separator = True elif field_value[pos] == ",": # next forwarded-element need_separator = False elem = {} elems.append(types.MappingProxyType(elem)) pos += 1 elif field_value[pos] == ";": # next forwarded-pair need_separator = False pos += 1 elif field_value[pos] in " \t": # Allow whitespace even between forwarded-pairs, though # RFC 7239 doesn't. This simplifies code and is in line # with Postel's law. pos += 1 else: # bad syntax here, skip to next comma pos = field_value.find(",", pos) return tuple(elems) @reify def scheme(self) -> str: """A string representing the scheme of the request. Hostname is resolved in this order: - overridden value by .clone(scheme=new_scheme) call. - type of connection to peer: HTTPS if socket is SSL, HTTP otherwise. 'http' or 'https'. """ if self._transport_sslcontext: return "https" else: return "http" @reify def method(self) -> str: """Read only property for getting HTTP method. The value is upper-cased str like 'GET', 'POST', 'PUT' etc. """ return self._method @reify def version(self) -> HttpVersion: """Read only property for getting HTTP version of request. Returns aiohttp.protocol.HttpVersion instance. """ return self._version @reify def host(self) -> str: """Hostname of the request. Hostname is resolved in this order: - overridden value by .clone(host=new_host) call. - HOST HTTP header - socket.getfqdn() value """ host = self._message.headers.get(hdrs.HOST) if host is not None: return host return socket.getfqdn() @reify def remote(self) -> Optional[str]: """Remote IP of client initiated HTTP request. The IP is resolved in this order: - overridden value by .clone(remote=new_remote) call. - peername of opened socket """ if self._transport_peername is None: return None if isinstance(self._transport_peername, (list, tuple)): return str(self._transport_peername[0]) return str(self._transport_peername) @reify def url(self) -> URL: url = URL.build(scheme=self.scheme, host=self.host) return url.join(self._rel_url) @reify def path(self) -> str: """The URL including *PATH INFO* without the host or scheme. E.g., ``/app/blog`` """ return self._rel_url.path @reify def path_qs(self) -> str: """The URL including PATH_INFO and the query string. E.g, /app/blog?id=10 """ return str(self._rel_url) @reify def raw_path(self) -> str: """The URL including raw *PATH INFO* without the host or scheme. Warning, the path is unquoted and may contains non valid URL characters E.g., ``/my%2Fpath%7Cwith%21some%25strange%24characters`` """ return self._message.path @reify def query(self) -> "MultiMapping[str]": """A multidict with all the variables in the query string.""" return MultiDictProxy(self._rel_url.query) @reify def query_string(self) -> str: """The query string in the URL. E.g., id=10 """ return self._rel_url.query_string @reify def headers(self) -> "MultiMapping[str]": """A case-insensitive multidict proxy with all headers.""" return self._headers @reify def raw_headers(self) -> RawHeaders: """A sequence of pairs for all headers.""" return self._message.raw_headers @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 parse_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 parse_http_date(self.headers.get(hdrs.IF_UNMODIFIED_SINCE)) @staticmethod def _etag_values(etag_header: str) -> Iterator[ETag]: """Extract `ETag` objects from raw header.""" if etag_header == ETAG_ANY: yield ETag( is_weak=False, value=ETAG_ANY, ) else: for match in LIST_QUOTED_ETAG_RE.finditer(etag_header): is_weak, value, garbage = match.group(2, 3, 4) # Any symbol captured by 4th group means # that the following sequence is invalid. if garbage: break yield ETag( is_weak=bool(is_weak), value=value, ) @classmethod def _if_match_or_none_impl( cls, header_value: Optional[str] ) -> Optional[Tuple[ETag, ...]]: if not header_value: return None return tuple(cls._etag_values(header_value)) @reify def if_match(self) -> Optional[Tuple[ETag, ...]]: """The value of If-Match HTTP header, or None. This header is represented as a `tuple` of `ETag` objects. """ return self._if_match_or_none_impl(self.headers.get(hdrs.IF_MATCH)) @reify def if_none_match(self) -> Optional[Tuple[ETag, ...]]: """The value of If-None-Match HTTP header, or None. This header is represented as a `tuple` of `ETag` objects. """ return self._if_match_or_none_impl(self.headers.get(hdrs.IF_NONE_MATCH)) @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 parse_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) 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") 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) @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[Union[str, bytes, FileField]] = MultiDict() 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: tmp.close() 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: Optional[UrlMappingMatchInfo] = None 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: Union[str, _SENTINEL] = sentinel, rel_url: Union[StrOrURL, _SENTINEL] = sentinel, headers: Union[LooseHeaders, _SENTINEL] = sentinel, scheme: Union[str, _SENTINEL] = sentinel, host: Union[str, _SENTINEL] = sentinel, remote: Union[str, _SENTINEL] = sentinel, client_max_size: Union[int, _SENTINEL] = sentinel, ) -> "Request": ret = super().clone( method=method, rel_url=rel_url, headers=headers, scheme=scheme, host=host, remote=remote, client_max_size=client_max_size, ) 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)