mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-09-20 06:17:29 +02:00
957 lines
32 KiB
Python
957 lines
32 KiB
Python
import base64
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import binascii
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import json
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import re
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import uuid
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import warnings
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import zlib
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from collections import deque
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from types import TracebackType
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from typing import (
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TYPE_CHECKING,
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Any,
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AsyncIterator,
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Dict,
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Iterator,
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List,
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Mapping,
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Optional,
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Sequence,
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Tuple,
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Type,
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Union,
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)
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from urllib.parse import parse_qsl, unquote, urlencode
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from multidict import CIMultiDict, CIMultiDictProxy, MultiMapping
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from .hdrs import (
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CONTENT_DISPOSITION,
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CONTENT_ENCODING,
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CONTENT_LENGTH,
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CONTENT_TRANSFER_ENCODING,
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CONTENT_TYPE,
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)
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from .helpers import CHAR, TOKEN, parse_mimetype, reify
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from .http import HeadersParser
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from .payload import (
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JsonPayload,
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LookupError,
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Order,
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Payload,
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StringPayload,
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get_payload,
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payload_type,
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)
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from .streams import StreamReader
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__all__ = (
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"MultipartReader",
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"MultipartWriter",
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"BodyPartReader",
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"BadContentDispositionHeader",
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"BadContentDispositionParam",
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"parse_content_disposition",
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"content_disposition_filename",
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)
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if TYPE_CHECKING: # pragma: no cover
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from .client_reqrep import ClientResponse
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class BadContentDispositionHeader(RuntimeWarning):
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pass
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class BadContentDispositionParam(RuntimeWarning):
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pass
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def parse_content_disposition(
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header: Optional[str],
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) -> Tuple[Optional[str], Dict[str, str]]:
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def is_token(string: str) -> bool:
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return bool(string) and TOKEN >= set(string)
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def is_quoted(string: str) -> bool:
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return string[0] == string[-1] == '"'
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def is_rfc5987(string: str) -> bool:
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return is_token(string) and string.count("'") == 2
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def is_extended_param(string: str) -> bool:
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return string.endswith("*")
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def is_continuous_param(string: str) -> bool:
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pos = string.find("*") + 1
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if not pos:
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return False
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substring = string[pos:-1] if string.endswith("*") else string[pos:]
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return substring.isdigit()
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def unescape(text: str, *, chars: str = "".join(map(re.escape, CHAR))) -> str:
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return re.sub(f"\\\\([{chars}])", "\\1", text)
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if not header:
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return None, {}
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disptype, *parts = header.split(";")
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if not is_token(disptype):
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warnings.warn(BadContentDispositionHeader(header))
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return None, {}
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params = {} # type: Dict[str, str]
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while parts:
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item = parts.pop(0)
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if "=" not in item:
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warnings.warn(BadContentDispositionHeader(header))
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return None, {}
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key, value = item.split("=", 1)
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key = key.lower().strip()
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value = value.lstrip()
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if key in params:
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warnings.warn(BadContentDispositionHeader(header))
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return None, {}
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if not is_token(key):
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warnings.warn(BadContentDispositionParam(item))
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continue
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elif is_continuous_param(key):
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if is_quoted(value):
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value = unescape(value[1:-1])
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elif not is_token(value):
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warnings.warn(BadContentDispositionParam(item))
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continue
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elif is_extended_param(key):
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if is_rfc5987(value):
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encoding, _, value = value.split("'", 2)
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encoding = encoding or "utf-8"
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else:
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warnings.warn(BadContentDispositionParam(item))
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continue
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try:
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value = unquote(value, encoding, "strict")
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except UnicodeDecodeError: # pragma: nocover
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warnings.warn(BadContentDispositionParam(item))
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continue
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else:
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failed = True
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if is_quoted(value):
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failed = False
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value = unescape(value[1:-1].lstrip("\\/"))
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elif is_token(value):
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failed = False
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elif parts:
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# maybe just ; in filename, in any case this is just
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# one case fix, for proper fix we need to redesign parser
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_value = "{};{}".format(value, parts[0])
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if is_quoted(_value):
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parts.pop(0)
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value = unescape(_value[1:-1].lstrip("\\/"))
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failed = False
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if failed:
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warnings.warn(BadContentDispositionHeader(header))
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return None, {}
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params[key] = value
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return disptype.lower(), params
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def content_disposition_filename(
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params: Mapping[str, str], name: str = "filename"
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) -> Optional[str]:
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name_suf = "%s*" % name
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if not params:
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return None
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elif name_suf in params:
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return params[name_suf]
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elif name in params:
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return params[name]
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else:
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parts = []
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fnparams = sorted(
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(key, value) for key, value in params.items() if key.startswith(name_suf)
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)
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for num, (key, value) in enumerate(fnparams):
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_, tail = key.split("*", 1)
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if tail.endswith("*"):
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tail = tail[:-1]
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if tail == str(num):
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parts.append(value)
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else:
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break
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if not parts:
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return None
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value = "".join(parts)
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if "'" in value:
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encoding, _, value = value.split("'", 2)
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encoding = encoding or "utf-8"
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return unquote(value, encoding, "strict")
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return value
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class MultipartResponseWrapper:
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"""Wrapper around the MultipartReader.
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It takes care about
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underlying connection and close it when it needs in.
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"""
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def __init__(
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self,
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resp: "ClientResponse",
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stream: "MultipartReader",
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) -> None:
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self.resp = resp
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self.stream = stream
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def __aiter__(self) -> "MultipartResponseWrapper":
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return self
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async def __anext__(
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self,
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) -> Union["MultipartReader", "BodyPartReader"]:
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part = await self.next()
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if part is None:
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raise StopAsyncIteration
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return part
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def at_eof(self) -> bool:
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"""Returns True when all response data had been read."""
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return self.resp.content.at_eof()
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async def next(
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self,
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) -> Optional[Union["MultipartReader", "BodyPartReader"]]:
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"""Emits next multipart reader object."""
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item = await self.stream.next()
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if self.stream.at_eof():
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await self.release()
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return item
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async def release(self) -> None:
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"""Releases the connection gracefully, reading all the content
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to the void."""
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await self.resp.release()
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class BodyPartReader:
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"""Multipart reader for single body part."""
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chunk_size = 8192
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def __init__(
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self, boundary: bytes, headers: "CIMultiDictProxy[str]", content: StreamReader
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) -> None:
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self.headers = headers
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self._boundary = boundary
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self._content = content
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self._at_eof = False
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length = self.headers.get(CONTENT_LENGTH, None)
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self._length = int(length) if length is not None else None
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self._read_bytes = 0
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# TODO: typeing.Deque is not supported by Python 3.5
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self._unread = deque() # type: Any
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self._prev_chunk = None # type: Optional[bytes]
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self._content_eof = 0
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self._cache = {} # type: Dict[str, Any]
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def __aiter__(self) -> AsyncIterator["BodyPartReader"]:
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return self # type: ignore
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async def __anext__(self) -> bytes:
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part = await self.next()
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if part is None:
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raise StopAsyncIteration
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return part
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async def next(self) -> Optional[bytes]:
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item = await self.read()
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if not item:
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return None
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return item
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async def read(self, *, decode: bool = False) -> bytes:
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"""Reads body part data.
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decode: Decodes data following by encoding
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method from Content-Encoding header. If it missed
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data remains untouched
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"""
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if self._at_eof:
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return b""
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data = bytearray()
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while not self._at_eof:
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data.extend(await self.read_chunk(self.chunk_size))
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if decode:
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return self.decode(data)
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return data
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async def read_chunk(self, size: int = chunk_size) -> bytes:
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"""Reads body part content chunk of the specified size.
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size: chunk size
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"""
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if self._at_eof:
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return b""
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if self._length:
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chunk = await self._read_chunk_from_length(size)
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else:
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chunk = await self._read_chunk_from_stream(size)
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self._read_bytes += len(chunk)
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if self._read_bytes == self._length:
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self._at_eof = True
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if self._at_eof:
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clrf = await self._content.readline()
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assert (
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b"\r\n" == clrf
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), "reader did not read all the data or it is malformed"
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return chunk
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async def _read_chunk_from_length(self, size: int) -> bytes:
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# Reads body part content chunk of the specified size.
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# The body part must has Content-Length header with proper value.
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assert self._length is not None, "Content-Length required for chunked read"
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chunk_size = min(size, self._length - self._read_bytes)
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chunk = await self._content.read(chunk_size)
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return chunk
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async def _read_chunk_from_stream(self, size: int) -> bytes:
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# Reads content chunk of body part with unknown length.
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# The Content-Length header for body part is not necessary.
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assert (
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size >= len(self._boundary) + 2
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), "Chunk size must be greater or equal than boundary length + 2"
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first_chunk = self._prev_chunk is None
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if first_chunk:
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self._prev_chunk = await self._content.read(size)
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chunk = await self._content.read(size)
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self._content_eof += int(self._content.at_eof())
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assert self._content_eof < 3, "Reading after EOF"
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assert self._prev_chunk is not None
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window = self._prev_chunk + chunk
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sub = b"\r\n" + self._boundary
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if first_chunk:
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idx = window.find(sub)
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else:
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idx = window.find(sub, max(0, len(self._prev_chunk) - len(sub)))
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if idx >= 0:
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# pushing boundary back to content
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with warnings.catch_warnings():
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warnings.filterwarnings("ignore", category=DeprecationWarning)
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self._content.unread_data(window[idx:])
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if size > idx:
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self._prev_chunk = self._prev_chunk[:idx]
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chunk = window[len(self._prev_chunk) : idx]
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if not chunk:
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self._at_eof = True
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result = self._prev_chunk
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self._prev_chunk = chunk
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return result
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async def readline(self) -> bytes:
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"""Reads body part by line by line."""
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if self._at_eof:
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return b""
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if self._unread:
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line = self._unread.popleft()
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else:
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line = await self._content.readline()
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if line.startswith(self._boundary):
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# the very last boundary may not come with \r\n,
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# so set single rules for everyone
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sline = line.rstrip(b"\r\n")
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boundary = self._boundary
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last_boundary = self._boundary + b"--"
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# ensure that we read exactly the boundary, not something alike
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if sline == boundary or sline == last_boundary:
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self._at_eof = True
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self._unread.append(line)
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return b""
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else:
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next_line = await self._content.readline()
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if next_line.startswith(self._boundary):
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line = line[:-2] # strip CRLF but only once
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self._unread.append(next_line)
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return line
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async def release(self) -> None:
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"""Like read(), but reads all the data to the void."""
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if self._at_eof:
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return
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while not self._at_eof:
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await self.read_chunk(self.chunk_size)
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async def text(self, *, encoding: Optional[str] = None) -> str:
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"""Like read(), but assumes that body part contains text data."""
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data = await self.read(decode=True)
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# see https://www.w3.org/TR/html5/forms.html#multipart/form-data-encoding-algorithm # NOQA
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# and https://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html#dom-xmlhttprequest-send # NOQA
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encoding = encoding or self.get_charset(default="utf-8")
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return data.decode(encoding)
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async def json(self, *, encoding: Optional[str] = None) -> Optional[Dict[str, Any]]:
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"""Like read(), but assumes that body parts contains JSON data."""
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data = await self.read(decode=True)
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if not data:
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return None
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encoding = encoding or self.get_charset(default="utf-8")
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return json.loads(data.decode(encoding))
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async def form(self, *, encoding: Optional[str] = None) -> List[Tuple[str, str]]:
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"""Like read(), but assumes that body parts contains form
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urlencoded data.
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"""
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data = await self.read(decode=True)
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if not data:
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return []
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if encoding is not None:
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real_encoding = encoding
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else:
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real_encoding = self.get_charset(default="utf-8")
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return parse_qsl(
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data.rstrip().decode(real_encoding),
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keep_blank_values=True,
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encoding=real_encoding,
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)
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def at_eof(self) -> bool:
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"""Returns True if the boundary was reached or False otherwise."""
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return self._at_eof
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def decode(self, data: bytes) -> bytes:
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"""Decodes data according the specified Content-Encoding
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or Content-Transfer-Encoding headers value.
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"""
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if CONTENT_TRANSFER_ENCODING in self.headers:
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data = self._decode_content_transfer(data)
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if CONTENT_ENCODING in self.headers:
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return self._decode_content(data)
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return data
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def _decode_content(self, data: bytes) -> bytes:
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encoding = self.headers.get(CONTENT_ENCODING, "").lower()
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if encoding == "deflate":
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return zlib.decompress(data, -zlib.MAX_WBITS)
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elif encoding == "gzip":
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return zlib.decompress(data, 16 + zlib.MAX_WBITS)
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elif encoding == "identity":
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return data
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else:
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raise RuntimeError(f"unknown content encoding: {encoding}")
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def _decode_content_transfer(self, data: bytes) -> bytes:
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encoding = self.headers.get(CONTENT_TRANSFER_ENCODING, "").lower()
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if encoding == "base64":
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return base64.b64decode(data)
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elif encoding == "quoted-printable":
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return binascii.a2b_qp(data)
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elif encoding in ("binary", "8bit", "7bit"):
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return data
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else:
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raise RuntimeError(
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"unknown content transfer encoding: {}" "".format(encoding)
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)
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def get_charset(self, default: str) -> str:
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"""Returns charset parameter from Content-Type header or default."""
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ctype = self.headers.get(CONTENT_TYPE, "")
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mimetype = parse_mimetype(ctype)
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return mimetype.parameters.get("charset", default)
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@reify
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def name(self) -> Optional[str]:
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"""Returns name specified in Content-Disposition header or None
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if missed or header is malformed.
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"""
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_, params = parse_content_disposition(self.headers.get(CONTENT_DISPOSITION))
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return content_disposition_filename(params, "name")
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@reify
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def filename(self) -> Optional[str]:
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"""Returns filename specified in Content-Disposition header or None
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if missed or header is malformed.
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"""
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_, params = parse_content_disposition(self.headers.get(CONTENT_DISPOSITION))
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return content_disposition_filename(params, "filename")
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|
|
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@payload_type(BodyPartReader, order=Order.try_first)
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class BodyPartReaderPayload(Payload):
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def __init__(self, value: BodyPartReader, *args: Any, **kwargs: Any) -> None:
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super().__init__(value, *args, **kwargs)
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params = {} # type: Dict[str, str]
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if value.name is not None:
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params["name"] = value.name
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if value.filename is not None:
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params["filename"] = value.filename
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if params:
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self.set_content_disposition("attachment", True, **params)
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async def write(self, writer: Any) -> None:
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field = self._value
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chunk = await field.read_chunk(size=2 ** 16)
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while chunk:
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await writer.write(field.decode(chunk))
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chunk = await field.read_chunk(size=2 ** 16)
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|
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class MultipartReader:
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"""Multipart body reader."""
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|
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#: Response wrapper, used when multipart readers constructs from response.
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response_wrapper_cls = MultipartResponseWrapper
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#: Multipart reader class, used to handle multipart/* body parts.
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#: None points to type(self)
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multipart_reader_cls = None
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#: Body part reader class for non multipart/* content types.
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part_reader_cls = BodyPartReader
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def __init__(self, headers: Mapping[str, str], content: StreamReader) -> None:
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self.headers = headers
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self._boundary = ("--" + self._get_boundary()).encode()
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self._content = content
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self._last_part = (
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None
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) # type: Optional[Union['MultipartReader', BodyPartReader]]
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self._at_eof = False
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self._at_bof = True
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self._unread = [] # type: List[bytes]
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|
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def __aiter__(
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self,
|
|
) -> AsyncIterator["BodyPartReader"]:
|
|
return self # type: ignore
|
|
|
|
async def __anext__(
|
|
self,
|
|
) -> Optional[Union["MultipartReader", BodyPartReader]]:
|
|
part = await self.next()
|
|
if part is None:
|
|
raise StopAsyncIteration
|
|
return part
|
|
|
|
@classmethod
|
|
def from_response(
|
|
cls,
|
|
response: "ClientResponse",
|
|
) -> MultipartResponseWrapper:
|
|
"""Constructs reader instance from HTTP response.
|
|
|
|
:param response: :class:`~aiohttp.client.ClientResponse` instance
|
|
"""
|
|
obj = cls.response_wrapper_cls(
|
|
response, cls(response.headers, response.content)
|
|
)
|
|
return obj
|
|
|
|
def at_eof(self) -> bool:
|
|
"""Returns True if the final boundary was reached or
|
|
False otherwise.
|
|
"""
|
|
return self._at_eof
|
|
|
|
async def next(
|
|
self,
|
|
) -> Optional[Union["MultipartReader", BodyPartReader]]:
|
|
"""Emits the next multipart body part."""
|
|
# So, if we're at BOF, we need to skip till the boundary.
|
|
if self._at_eof:
|
|
return None
|
|
await self._maybe_release_last_part()
|
|
if self._at_bof:
|
|
await self._read_until_first_boundary()
|
|
self._at_bof = False
|
|
else:
|
|
await self._read_boundary()
|
|
if self._at_eof: # we just read the last boundary, nothing to do there
|
|
return None
|
|
self._last_part = await self.fetch_next_part()
|
|
return self._last_part
|
|
|
|
async def release(self) -> None:
|
|
"""Reads all the body parts to the void till the final boundary."""
|
|
while not self._at_eof:
|
|
item = await self.next()
|
|
if item is None:
|
|
break
|
|
await item.release()
|
|
|
|
async def fetch_next_part(
|
|
self,
|
|
) -> Union["MultipartReader", BodyPartReader]:
|
|
"""Returns the next body part reader."""
|
|
headers = await self._read_headers()
|
|
return self._get_part_reader(headers)
|
|
|
|
def _get_part_reader(
|
|
self,
|
|
headers: "CIMultiDictProxy[str]",
|
|
) -> Union["MultipartReader", BodyPartReader]:
|
|
"""Dispatches the response by the `Content-Type` header, returning
|
|
suitable reader instance.
|
|
|
|
:param dict headers: Response headers
|
|
"""
|
|
ctype = headers.get(CONTENT_TYPE, "")
|
|
mimetype = parse_mimetype(ctype)
|
|
|
|
if mimetype.type == "multipart":
|
|
if self.multipart_reader_cls is None:
|
|
return type(self)(headers, self._content)
|
|
return self.multipart_reader_cls(headers, self._content)
|
|
else:
|
|
return self.part_reader_cls(self._boundary, headers, self._content)
|
|
|
|
def _get_boundary(self) -> str:
|
|
mimetype = parse_mimetype(self.headers[CONTENT_TYPE])
|
|
|
|
assert mimetype.type == "multipart", "multipart/* content type expected"
|
|
|
|
if "boundary" not in mimetype.parameters:
|
|
raise ValueError(
|
|
"boundary missed for Content-Type: %s" % self.headers[CONTENT_TYPE]
|
|
)
|
|
|
|
boundary = mimetype.parameters["boundary"]
|
|
if len(boundary) > 70:
|
|
raise ValueError("boundary %r is too long (70 chars max)" % boundary)
|
|
|
|
return boundary
|
|
|
|
async def _readline(self) -> bytes:
|
|
if self._unread:
|
|
return self._unread.pop()
|
|
return await self._content.readline()
|
|
|
|
async def _read_until_first_boundary(self) -> None:
|
|
while True:
|
|
chunk = await self._readline()
|
|
if chunk == b"":
|
|
raise ValueError(
|
|
"Could not find starting boundary %r" % (self._boundary)
|
|
)
|
|
chunk = chunk.rstrip()
|
|
if chunk == self._boundary:
|
|
return
|
|
elif chunk == self._boundary + b"--":
|
|
self._at_eof = True
|
|
return
|
|
|
|
async def _read_boundary(self) -> None:
|
|
chunk = (await self._readline()).rstrip()
|
|
if chunk == self._boundary:
|
|
pass
|
|
elif chunk == self._boundary + b"--":
|
|
self._at_eof = True
|
|
epilogue = await self._readline()
|
|
next_line = await self._readline()
|
|
|
|
# the epilogue is expected and then either the end of input or the
|
|
# parent multipart boundary, if the parent boundary is found then
|
|
# it should be marked as unread and handed to the parent for
|
|
# processing
|
|
if next_line[:2] == b"--":
|
|
self._unread.append(next_line)
|
|
# otherwise the request is likely missing an epilogue and both
|
|
# lines should be passed to the parent for processing
|
|
# (this handles the old behavior gracefully)
|
|
else:
|
|
self._unread.extend([next_line, epilogue])
|
|
else:
|
|
raise ValueError(f"Invalid boundary {chunk!r}, expected {self._boundary!r}")
|
|
|
|
async def _read_headers(self) -> "CIMultiDictProxy[str]":
|
|
lines = [b""]
|
|
while True:
|
|
chunk = await self._content.readline()
|
|
chunk = chunk.strip()
|
|
lines.append(chunk)
|
|
if not chunk:
|
|
break
|
|
parser = HeadersParser()
|
|
headers, raw_headers = parser.parse_headers(lines)
|
|
return headers
|
|
|
|
async def _maybe_release_last_part(self) -> None:
|
|
"""Ensures that the last read body part is read completely."""
|
|
if self._last_part is not None:
|
|
if not self._last_part.at_eof():
|
|
await self._last_part.release()
|
|
self._unread.extend(self._last_part._unread)
|
|
self._last_part = None
|
|
|
|
|
|
_Part = Tuple[Payload, str, str]
|
|
|
|
|
|
class MultipartWriter(Payload):
|
|
"""Multipart body writer."""
|
|
|
|
def __init__(self, subtype: str = "mixed", boundary: Optional[str] = None) -> None:
|
|
boundary = boundary if boundary is not None else uuid.uuid4().hex
|
|
# The underlying Payload API demands a str (utf-8), not bytes,
|
|
# so we need to ensure we don't lose anything during conversion.
|
|
# As a result, require the boundary to be ASCII only.
|
|
# In both situations.
|
|
|
|
try:
|
|
self._boundary = boundary.encode("ascii")
|
|
except UnicodeEncodeError:
|
|
raise ValueError("boundary should contain ASCII only chars") from None
|
|
ctype = f"multipart/{subtype}; boundary={self._boundary_value}"
|
|
|
|
super().__init__(None, content_type=ctype)
|
|
|
|
self._parts = [] # type: List[_Part]
|
|
|
|
def __enter__(self) -> "MultipartWriter":
|
|
return self
|
|
|
|
def __exit__(
|
|
self,
|
|
exc_type: Optional[Type[BaseException]],
|
|
exc_val: Optional[BaseException],
|
|
exc_tb: Optional[TracebackType],
|
|
) -> None:
|
|
pass
|
|
|
|
def __iter__(self) -> Iterator[_Part]:
|
|
return iter(self._parts)
|
|
|
|
def __len__(self) -> int:
|
|
return len(self._parts)
|
|
|
|
def __bool__(self) -> bool:
|
|
return True
|
|
|
|
_valid_tchar_regex = re.compile(br"\A[!#$%&'*+\-.^_`|~\w]+\Z")
|
|
_invalid_qdtext_char_regex = re.compile(br"[\x00-\x08\x0A-\x1F\x7F]")
|
|
|
|
@property
|
|
def _boundary_value(self) -> str:
|
|
"""Wrap boundary parameter value in quotes, if necessary.
|
|
|
|
Reads self.boundary and returns a unicode sting.
|
|
"""
|
|
# Refer to RFCs 7231, 7230, 5234.
|
|
#
|
|
# parameter = token "=" ( token / quoted-string )
|
|
# token = 1*tchar
|
|
# quoted-string = DQUOTE *( qdtext / quoted-pair ) DQUOTE
|
|
# qdtext = HTAB / SP / %x21 / %x23-5B / %x5D-7E / obs-text
|
|
# obs-text = %x80-FF
|
|
# quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text )
|
|
# tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*"
|
|
# / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
|
|
# / DIGIT / ALPHA
|
|
# ; any VCHAR, except delimiters
|
|
# VCHAR = %x21-7E
|
|
value = self._boundary
|
|
if re.match(self._valid_tchar_regex, value):
|
|
return value.decode("ascii") # cannot fail
|
|
|
|
if re.search(self._invalid_qdtext_char_regex, value):
|
|
raise ValueError("boundary value contains invalid characters")
|
|
|
|
# escape %x5C and %x22
|
|
quoted_value_content = value.replace(b"\\", b"\\\\")
|
|
quoted_value_content = quoted_value_content.replace(b'"', b'\\"')
|
|
|
|
return '"' + quoted_value_content.decode("ascii") + '"'
|
|
|
|
@property
|
|
def boundary(self) -> str:
|
|
return self._boundary.decode("ascii")
|
|
|
|
def append(self, obj: Any, headers: Optional[MultiMapping[str]] = None) -> Payload:
|
|
if headers is None:
|
|
headers = CIMultiDict()
|
|
|
|
if isinstance(obj, Payload):
|
|
obj.headers.update(headers)
|
|
return self.append_payload(obj)
|
|
else:
|
|
try:
|
|
payload = get_payload(obj, headers=headers)
|
|
except LookupError:
|
|
raise TypeError("Cannot create payload from %r" % obj)
|
|
else:
|
|
return self.append_payload(payload)
|
|
|
|
def append_payload(self, payload: Payload) -> Payload:
|
|
"""Adds a new body part to multipart writer."""
|
|
# compression
|
|
encoding = payload.headers.get(
|
|
CONTENT_ENCODING,
|
|
"",
|
|
).lower() # type: Optional[str]
|
|
if encoding and encoding not in ("deflate", "gzip", "identity"):
|
|
raise RuntimeError(f"unknown content encoding: {encoding}")
|
|
if encoding == "identity":
|
|
encoding = None
|
|
|
|
# te encoding
|
|
te_encoding = payload.headers.get(
|
|
CONTENT_TRANSFER_ENCODING,
|
|
"",
|
|
).lower() # type: Optional[str]
|
|
if te_encoding not in ("", "base64", "quoted-printable", "binary"):
|
|
raise RuntimeError(
|
|
"unknown content transfer encoding: {}" "".format(te_encoding)
|
|
)
|
|
if te_encoding == "binary":
|
|
te_encoding = None
|
|
|
|
# size
|
|
size = payload.size
|
|
if size is not None and not (encoding or te_encoding):
|
|
payload.headers[CONTENT_LENGTH] = str(size)
|
|
|
|
self._parts.append((payload, encoding, te_encoding)) # type: ignore
|
|
return payload
|
|
|
|
def append_json(
|
|
self, obj: Any, headers: Optional[MultiMapping[str]] = None
|
|
) -> Payload:
|
|
"""Helper to append JSON part."""
|
|
if headers is None:
|
|
headers = CIMultiDict()
|
|
|
|
return self.append_payload(JsonPayload(obj, headers=headers))
|
|
|
|
def append_form(
|
|
self,
|
|
obj: Union[Sequence[Tuple[str, str]], Mapping[str, str]],
|
|
headers: Optional[MultiMapping[str]] = None,
|
|
) -> Payload:
|
|
"""Helper to append form urlencoded part."""
|
|
assert isinstance(obj, (Sequence, Mapping))
|
|
|
|
if headers is None:
|
|
headers = CIMultiDict()
|
|
|
|
if isinstance(obj, Mapping):
|
|
obj = list(obj.items())
|
|
data = urlencode(obj, doseq=True)
|
|
|
|
return self.append_payload(
|
|
StringPayload(
|
|
data, headers=headers, content_type="application/x-www-form-urlencoded"
|
|
)
|
|
)
|
|
|
|
@property
|
|
def size(self) -> Optional[int]:
|
|
"""Size of the payload."""
|
|
total = 0
|
|
for part, encoding, te_encoding in self._parts:
|
|
if encoding or te_encoding or part.size is None:
|
|
return None
|
|
|
|
total += int(
|
|
2
|
|
+ len(self._boundary)
|
|
+ 2
|
|
+ part.size # b'--'+self._boundary+b'\r\n'
|
|
+ len(part._binary_headers)
|
|
+ 2 # b'\r\n'
|
|
)
|
|
|
|
total += 2 + len(self._boundary) + 4 # b'--'+self._boundary+b'--\r\n'
|
|
return total
|
|
|
|
async def write(self, writer: Any, close_boundary: bool = True) -> None:
|
|
"""Write body."""
|
|
for part, encoding, te_encoding in self._parts:
|
|
await writer.write(b"--" + self._boundary + b"\r\n")
|
|
await writer.write(part._binary_headers)
|
|
|
|
if encoding or te_encoding:
|
|
w = MultipartPayloadWriter(writer)
|
|
if encoding:
|
|
w.enable_compression(encoding)
|
|
if te_encoding:
|
|
w.enable_encoding(te_encoding)
|
|
await part.write(w) # type: ignore
|
|
await w.write_eof()
|
|
else:
|
|
await part.write(writer)
|
|
|
|
await writer.write(b"\r\n")
|
|
|
|
if close_boundary:
|
|
await writer.write(b"--" + self._boundary + b"--\r\n")
|
|
|
|
|
|
class MultipartPayloadWriter:
|
|
def __init__(self, writer: Any) -> None:
|
|
self._writer = writer
|
|
self._encoding = None # type: Optional[str]
|
|
self._compress = None # type: Any
|
|
self._encoding_buffer = None # type: Optional[bytearray]
|
|
|
|
def enable_encoding(self, encoding: str) -> None:
|
|
if encoding == "base64":
|
|
self._encoding = encoding
|
|
self._encoding_buffer = bytearray()
|
|
elif encoding == "quoted-printable":
|
|
self._encoding = "quoted-printable"
|
|
|
|
def enable_compression(self, encoding: str = "deflate") -> None:
|
|
zlib_mode = 16 + zlib.MAX_WBITS if encoding == "gzip" else -zlib.MAX_WBITS
|
|
self._compress = zlib.compressobj(wbits=zlib_mode)
|
|
|
|
async def write_eof(self) -> None:
|
|
if self._compress is not None:
|
|
chunk = self._compress.flush()
|
|
if chunk:
|
|
self._compress = None
|
|
await self.write(chunk)
|
|
|
|
if self._encoding == "base64":
|
|
if self._encoding_buffer:
|
|
await self._writer.write(base64.b64encode(self._encoding_buffer))
|
|
|
|
async def write(self, chunk: bytes) -> None:
|
|
if self._compress is not None:
|
|
if chunk:
|
|
chunk = self._compress.compress(chunk)
|
|
if not chunk:
|
|
return
|
|
|
|
if self._encoding == "base64":
|
|
buf = self._encoding_buffer
|
|
assert buf is not None
|
|
buf.extend(chunk)
|
|
|
|
if buf:
|
|
div, mod = divmod(len(buf), 3)
|
|
enc_chunk, self._encoding_buffer = (buf[: div * 3], buf[div * 3 :])
|
|
if enc_chunk:
|
|
b64chunk = base64.b64encode(enc_chunk)
|
|
await self._writer.write(b64chunk)
|
|
elif self._encoding == "quoted-printable":
|
|
await self._writer.write(binascii.b2a_qp(chunk))
|
|
else:
|
|
await self._writer.write(chunk)
|