EVOLUTION-MANAGER

Edit File: _content.py

import inspect
import warnings
from json import dumps as json_dumps
from typing import (
    Any,
    AsyncIterable,
    AsyncIterator,
    Dict,
    Iterable,
    Iterator,
    Tuple,
    Union,
)
from urllib.parse import urlencode

from ._exceptions import StreamClosed, StreamConsumed
from ._multipart import MultipartStream
from ._types import (
    AsyncByteStream,
    RequestContent,
    RequestData,
    RequestFiles,
    ResponseContent,
    SyncByteStream,
)
from ._utils import peek_filelike_length, primitive_value_to_str

class ByteStream(AsyncByteStream, SyncByteStream):
    def __init__(self, stream: bytes) -> None:
        self._stream = stream

def __iter__(self) -> Iterator[bytes]:
        yield self._stream

async def __aiter__(self) -> AsyncIterator[bytes]:
        yield self._stream

class IteratorByteStream(SyncByteStream):
    def __init__(self, stream: Iterable[bytes]):
        self._stream = stream
        self._is_stream_consumed = False
        self._is_generator = inspect.isgenerator(stream)

def __iter__(self) -> Iterator[bytes]:
        if self._is_stream_consumed and self._is_generator:
            raise StreamConsumed()

self._is_stream_consumed = True
        for part in self._stream:
            yield part

class AsyncIteratorByteStream(AsyncByteStream):
    def __init__(self, stream: AsyncIterable[bytes]):
        self._stream = stream
        self._is_stream_consumed = False
        self._is_generator = inspect.isasyncgen(stream)

async def __aiter__(self) -> AsyncIterator[bytes]:
        if self._is_stream_consumed and self._is_generator:
            raise StreamConsumed()

self._is_stream_consumed = True
        async for part in self._stream:
            yield part

class UnattachedStream(AsyncByteStream, SyncByteStream):
    """
    If a request or response is serialized using pickle, then it is no longer
    attached to a stream for I/O purposes. Any stream operations should result
    in `httpx.StreamClosed`.
    """

def __iter__(self) -> Iterator[bytes]:
        raise StreamClosed()

async def __aiter__(self) -> AsyncIterator[bytes]:
        raise StreamClosed()
        yield b""  # pragma: nocover

def encode_content(
    content: Union[str, bytes, Iterable[bytes], AsyncIterable[bytes]]
) -> Tuple[Dict[str, str], Union[SyncByteStream, AsyncByteStream]]:

if isinstance(content, (bytes, str)):
        body = content.encode("utf-8") if isinstance(content, str) else content
        content_length = len(body)
        headers = {"Content-Length": str(content_length)} if body else {}
        return headers, ByteStream(body)

elif isinstance(content, Iterable):
        content_length_or_none = peek_filelike_length(content)

if content_length_or_none is None:
            headers = {"Transfer-Encoding": "chunked"}
        else:
            headers = {"Content-Length": str(content_length_or_none)}
        return headers, IteratorByteStream(content)  # type: ignore

elif isinstance(content, AsyncIterable):
        headers = {"Transfer-Encoding": "chunked"}
        return headers, AsyncIteratorByteStream(content)

raise TypeError(f"Unexpected type for 'content', {type(content)!r}")

def encode_urlencoded_data(
    data: dict,
) -> Tuple[Dict[str, str], ByteStream]:
    plain_data = []
    for key, value in data.items():
        if isinstance(value, (list, tuple)):
            plain_data.extend([(key, primitive_value_to_str(item)) for item in value])
        else:
            plain_data.append((key, primitive_value_to_str(value)))
    body = urlencode(plain_data, doseq=True).encode("utf-8")
    content_length = str(len(body))
    content_type = "application/x-www-form-urlencoded"
    headers = {"Content-Length": content_length, "Content-Type": content_type}
    return headers, ByteStream(body)

def encode_multipart_data(
    data: dict, files: RequestFiles, boundary: bytes = None
) -> Tuple[Dict[str, str], MultipartStream]:
    multipart = MultipartStream(data=data, files=files, boundary=boundary)
    headers = multipart.get_headers()
    return headers, multipart

def encode_text(text: str) -> Tuple[Dict[str, str], ByteStream]:
    body = text.encode("utf-8")
    content_length = str(len(body))
    content_type = "text/plain; charset=utf-8"
    headers = {"Content-Length": content_length, "Content-Type": content_type}
    return headers, ByteStream(body)

def encode_html(html: str) -> Tuple[Dict[str, str], ByteStream]:
    body = html.encode("utf-8")
    content_length = str(len(body))
    content_type = "text/html; charset=utf-8"
    headers = {"Content-Length": content_length, "Content-Type": content_type}
    return headers, ByteStream(body)

def encode_json(json: Any) -> Tuple[Dict[str, str], ByteStream]:
    body = json_dumps(json).encode("utf-8")
    content_length = str(len(body))
    content_type = "application/json"
    headers = {"Content-Length": content_length, "Content-Type": content_type}
    return headers, ByteStream(body)

def encode_request(
    content: RequestContent = None,
    data: RequestData = None,
    files: RequestFiles = None,
    json: Any = None,
    boundary: bytes = None,
) -> Tuple[Dict[str, str], Union[SyncByteStream, AsyncByteStream]]:
    """
    Handles encoding the given `content`, `data`, `files`, and `json`,
    returning a two-tuple of (<headers>, <stream>).
    """
    if data is not None and not isinstance(data, dict):
        # We prefer to seperate `content=<bytes|str|byte iterator|bytes aiterator>`
        # for raw request content, and `data=<form data>` for url encoded or
        # multipart form content.
        #
        # However for compat with requests, we *do* still support
        # `data=<bytes...>` usages. We deal with that case here, treating it
        # as if `content=<...>` had been supplied instead.
        message = "Use 'content=<...>' to upload raw bytes/text content."
        warnings.warn(message, DeprecationWarning)
        return encode_content(data)

if content is not None:
        return encode_content(content)
    elif files:
        return encode_multipart_data(data or {}, files, boundary)
    elif data:
        return encode_urlencoded_data(data)
    elif json is not None:
        return encode_json(json)

return {}, ByteStream(b"")

def encode_response(
    content: ResponseContent = None,
    text: str = None,
    html: str = None,
    json: Any = None,
) -> Tuple[Dict[str, str], Union[SyncByteStream, AsyncByteStream]]:
    """
    Handles encoding the given `content`, returning a two-tuple of
    (<headers>, <stream>).
    """
    if content is not None:
        return encode_content(content)
    elif text is not None:
        return encode_text(text)
    elif html is not None:
        return encode_html(html)
    elif json is not None:
        return encode_json(json)

return {}, ByteStream(b"")