Mini Shell
from __future__ import annotations
import collections
import io
import json as _json
import logging
import re
import sys
import typing
import warnings
import zlib
from contextlib import contextmanager
from http.client import HTTPMessage as _HttplibHTTPMessage
from http.client import HTTPResponse as _HttplibHTTPResponse
from socket import timeout as SocketTimeout
try:
try:
import brotlicffi as brotli # type: ignore[import]
except ImportError:
import brotli # type: ignore[import]
except ImportError:
brotli = None
try:
import zstandard as zstd # type: ignore[import]
# The package 'zstandard' added the 'eof' property starting
# in v0.18.0 which we require to ensure a complete and
# valid zstd stream was fed into the ZstdDecoder.
# See: https://github.com/urllib3/urllib3/pull/2624
_zstd_version = _zstd_version = tuple(
map(int, re.search(r"^([0-9]+)\.([0-9]+)", zstd.__version__).groups()) # type: ignore[union-attr]
)
if _zstd_version < (0, 18): # Defensive:
zstd = None
except (AttributeError, ImportError, ValueError): # Defensive:
zstd = None
from . import util
from ._base_connection import _TYPE_BODY
from ._collections import HTTPHeaderDict
from .connection import BaseSSLError, HTTPConnection, HTTPException
from .exceptions import (
BodyNotHttplibCompatible,
DecodeError,
HTTPError,
IncompleteRead,
InvalidChunkLength,
InvalidHeader,
ProtocolError,
ReadTimeoutError,
ResponseNotChunked,
SSLError,
)
from .util.response import is_fp_closed, is_response_to_head
from .util.retry import Retry
if typing.TYPE_CHECKING:
from typing_extensions import Literal
from .connectionpool import HTTPConnectionPool
log = logging.getLogger(__name__)
class ContentDecoder:
def decompress(self, data: bytes) -> bytes:
raise NotImplementedError()
def flush(self) -> bytes:
raise NotImplementedError()
class DeflateDecoder(ContentDecoder):
def __init__(self) -> None:
self._first_try = True
self._data = b""
self._obj = zlib.decompressobj()
def decompress(self, data: bytes) -> bytes:
if not data:
return data
if not self._first_try:
return self._obj.decompress(data)
self._data += data
try:
decompressed = self._obj.decompress(data)
if decompressed:
self._first_try = False
self._data = None # type: ignore[assignment]
return decompressed
except zlib.error:
self._first_try = False
self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
try:
return self.decompress(self._data)
finally:
self._data = None # type: ignore[assignment]
def flush(self) -> bytes:
return self._obj.flush()
class GzipDecoderState:
FIRST_MEMBER = 0
OTHER_MEMBERS = 1
SWALLOW_DATA = 2
class GzipDecoder(ContentDecoder):
def __init__(self) -> None:
self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
self._state = GzipDecoderState.FIRST_MEMBER
def decompress(self, data: bytes) -> bytes:
ret = bytearray()
if self._state == GzipDecoderState.SWALLOW_DATA or not data:
return bytes(ret)
while True:
try:
ret += self._obj.decompress(data)
except zlib.error:
previous_state = self._state
# Ignore data after the first error
self._state = GzipDecoderState.SWALLOW_DATA
if previous_state == GzipDecoderState.OTHER_MEMBERS:
# Allow trailing garbage acceptable in other gzip clients
return bytes(ret)
raise
data = self._obj.unused_data
if not data:
return bytes(ret)
self._state = GzipDecoderState.OTHER_MEMBERS
self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
def flush(self) -> bytes:
return self._obj.flush()
if brotli is not None:
class BrotliDecoder(ContentDecoder):
# Supports both 'brotlipy' and 'Brotli' packages
# since they share an import name. The top branches
# are for 'brotlipy' and bottom branches for 'Brotli'
def __init__(self) -> None:
self._obj = brotli.Decompressor()
if hasattr(self._obj, "decompress"):
setattr(self, "decompress", self._obj.decompress)
else:
setattr(self, "decompress", self._obj.process)
def flush(self) -> bytes:
if hasattr(self._obj, "flush"):
return self._obj.flush() # type: ignore[no-any-return]
return b""
if zstd is not None:
class ZstdDecoder(ContentDecoder):
def __init__(self) -> None:
self._obj = zstd.ZstdDecompressor().decompressobj()
def decompress(self, data: bytes) -> bytes:
if not data:
return b""
data_parts = [self._obj.decompress(data)]
while self._obj.eof and self._obj.unused_data:
unused_data = self._obj.unused_data
self._obj = zstd.ZstdDecompressor().decompressobj()
data_parts.append(self._obj.decompress(unused_data))
return b"".join(data_parts)
def flush(self) -> bytes:
ret = self._obj.flush() # note: this is a no-op
if not self._obj.eof:
raise DecodeError("Zstandard data is incomplete")
return ret # type: ignore[no-any-return]
class MultiDecoder(ContentDecoder):
"""
From RFC7231:
If one or more encodings have been applied to a representation, the
sender that applied the encodings MUST generate a Content-Encoding
header field that lists the content codings in the order in which
they were applied.
"""
def __init__(self, modes: str) -> None:
self._decoders = [_get_decoder(m.strip()) for m in modes.split(",")]
def flush(self) -> bytes:
return self._decoders[0].flush()
def decompress(self, data: bytes) -> bytes:
for d in reversed(self._decoders):
data = d.decompress(data)
return data
def _get_decoder(mode: str) -> ContentDecoder:
if "," in mode:
return MultiDecoder(mode)
if mode == "gzip":
return GzipDecoder()
if brotli is not None and mode == "br":
return BrotliDecoder()
if zstd is not None and mode == "zstd":
return ZstdDecoder()
return DeflateDecoder()
class BytesQueueBuffer:
"""Memory-efficient bytes buffer
To return decoded data in read() and still follow the BufferedIOBase API, we need a
buffer to always return the correct amount of bytes.
This buffer should be filled using calls to put()
Our maximum memory usage is determined by the sum of the size of:
* self.buffer, which contains the full data
* the largest chunk that we will copy in get()
The worst case scenario is a single chunk, in which case we'll make a full copy of
the data inside get().
"""
def __init__(self) -> None:
self.buffer: typing.Deque[bytes] = collections.deque()
self._size: int = 0
def __len__(self) -> int:
return self._size
def put(self, data: bytes) -> None:
self.buffer.append(data)
self._size += len(data)
def get(self, n: int) -> bytes:
if n == 0:
return b""
elif not self.buffer:
raise RuntimeError("buffer is empty")
elif n < 0:
raise ValueError("n should be > 0")
fetched = 0
ret = io.BytesIO()
while fetched < n:
remaining = n - fetched
chunk = self.buffer.popleft()
chunk_length = len(chunk)
if remaining < chunk_length:
left_chunk, right_chunk = chunk[:remaining], chunk[remaining:]
ret.write(left_chunk)
self.buffer.appendleft(right_chunk)
self._size -= remaining
break
else:
ret.write(chunk)
self._size -= chunk_length
fetched += chunk_length
if not self.buffer:
break
return ret.getvalue()
class BaseHTTPResponse(io.IOBase):
CONTENT_DECODERS = ["gzip", "deflate"]
if brotli is not None:
CONTENT_DECODERS += ["br"]
if zstd is not None:
CONTENT_DECODERS += ["zstd"]
REDIRECT_STATUSES = [301, 302, 303, 307, 308]
DECODER_ERROR_CLASSES: tuple[type[Exception], ...] = (IOError, zlib.error)
if brotli is not None:
DECODER_ERROR_CLASSES += (brotli.error,)
if zstd is not None:
DECODER_ERROR_CLASSES += (zstd.ZstdError,)
def __init__(
self,
*,
headers: typing.Mapping[str, str] | typing.Mapping[bytes, bytes] | None = None,
status: int,
version: int,
reason: str | None,
decode_content: bool,
request_url: str | None,
retries: Retry | None = None,
) -> None:
if isinstance(headers, HTTPHeaderDict):
self.headers = headers
else:
self.headers = HTTPHeaderDict(headers) # type: ignore[arg-type]
self.status = status
self.version = version
self.reason = reason
self.decode_content = decode_content
self._has_decoded_content = False
self._request_url: str | None = request_url
self.retries = retries
self.chunked = False
tr_enc = self.headers.get("transfer-encoding", "").lower()
# Don't incur the penalty of creating a list and then discarding it
encodings = (enc.strip() for enc in tr_enc.split(","))
if "chunked" in encodings:
self.chunked = True
self._decoder: ContentDecoder | None = None
def get_redirect_location(self) -> str | None | Literal[False]:
"""
Should we redirect and where to?
:returns: Truthy redirect location string if we got a redirect status
code and valid location. ``None`` if redirect status and no
location. ``False`` if not a redirect status code.
"""
if self.status in self.REDIRECT_STATUSES:
return self.headers.get("location")
return False
@property
def data(self) -> bytes:
raise NotImplementedError()
def json(self) -> typing.Any:
"""
Parses the body of the HTTP response as JSON.
To use a custom JSON decoder pass the result of :attr:`HTTPResponse.data` to the decoder.
This method can raise either `UnicodeDecodeError` or `json.JSONDecodeError`.
Read more :ref:`here <json>`.
"""
data = self.data.decode("utf-8")
return _json.loads(data)
@property
def url(self) -> str | None:
raise NotImplementedError()
@url.setter
def url(self, url: str | None) -> None:
raise NotImplementedError()
@property
def connection(self) -> HTTPConnection | None:
raise NotImplementedError()
@property
def retries(self) -> Retry | None:
return self._retries
@retries.setter
def retries(self, retries: Retry | None) -> None:
# Override the request_url if retries has a redirect location.
if retries is not None and retries.history:
self.url = retries.history[-1].redirect_location
self._retries = retries
def stream(
self, amt: int | None = 2**16, decode_content: bool | None = None
) -> typing.Iterator[bytes]:
raise NotImplementedError()
def read(
self,
amt: int | None = None,
decode_content: bool | None = None,
cache_content: bool = False,
) -> bytes:
raise NotImplementedError()
def read_chunked(
self,
amt: int | None = None,
decode_content: bool | None = None,
) -> typing.Iterator[bytes]:
raise NotImplementedError()
def release_conn(self) -> None:
raise NotImplementedError()
def drain_conn(self) -> None:
raise NotImplementedError()
def close(self) -> None:
raise NotImplementedError()
def _init_decoder(self) -> None:
"""
Set-up the _decoder attribute if necessary.
"""
# Note: content-encoding value should be case-insensitive, per RFC 7230
# Section 3.2
content_encoding = self.headers.get("content-encoding", "").lower()
if self._decoder is None:
if content_encoding in self.CONTENT_DECODERS:
self._decoder = _get_decoder(content_encoding)
elif "," in content_encoding:
encodings = [
e.strip()
for e in content_encoding.split(",")
if e.strip() in self.CONTENT_DECODERS
]
if encodings:
self._decoder = _get_decoder(content_encoding)
def _decode(
self, data: bytes, decode_content: bool | None, flush_decoder: bool
) -> bytes:
"""
Decode the data passed in and potentially flush the decoder.
"""
if not decode_content:
if self._has_decoded_content:
raise RuntimeError(
"Calling read(decode_content=False) is not supported after "
"read(decode_content=True) was called."
)
return data
try:
if self._decoder:
data = self._decoder.decompress(data)
self._has_decoded_content = True
except self.DECODER_ERROR_CLASSES as e:
content_encoding = self.headers.get("content-encoding", "").lower()
raise DecodeError(
"Received response with content-encoding: %s, but "
"failed to decode it." % content_encoding,
e,
) from e
if flush_decoder:
data += self._flush_decoder()
return data
def _flush_decoder(self) -> bytes:
"""
Flushes the decoder. Should only be called if the decoder is actually
being used.
"""
if self._decoder:
return self._decoder.decompress(b"") + self._decoder.flush()
return b""
# Compatibility methods for `io` module
def readinto(self, b: bytearray) -> int:
temp = self.read(len(b))
if len(temp) == 0:
return 0
else:
b[: len(temp)] = temp
return len(temp)
# Compatibility methods for http.client.HTTPResponse
def getheaders(self) -> HTTPHeaderDict:
warnings.warn(
"HTTPResponse.getheaders() is deprecated and will be removed "
"in urllib3 v2.1.0. Instead access HTTPResponse.headers directly.",
category=DeprecationWarning,
stacklevel=2,
)
return self.headers
def getheader(self, name: str, default: str | None = None) -> str | None:
warnings.warn(
"HTTPResponse.getheader() is deprecated and will be removed "
"in urllib3 v2.1.0. Instead use HTTPResponse.headers.get(name, default).",
category=DeprecationWarning,
stacklevel=2,
)
return self.headers.get(name, default)
# Compatibility method for http.cookiejar
def info(self) -> HTTPHeaderDict:
return self.headers
def geturl(self) -> str | None:
return self.url
class HTTPResponse(BaseHTTPResponse):
"""
HTTP Response container.
Backwards-compatible with :class:`http.client.HTTPResponse` but the response ``body`` is
loaded and decoded on-demand when the ``data`` property is accessed. This
class is also compatible with the Python standard library's :mod:`io`
module, and can hence be treated as a readable object in the context of that
framework.
Extra parameters for behaviour not present in :class:`http.client.HTTPResponse`:
:param preload_content:
If True, the response's body will be preloaded during construction.
:param decode_content:
If True, will attempt to decode the body based on the
'content-encoding' header.
:param original_response:
When this HTTPResponse wrapper is generated from an :class:`http.client.HTTPResponse`
object, it's convenient to include the original for debug purposes. It's
otherwise unused.
:param retries:
The retries contains the last :class:`~urllib3.util.retry.Retry` that
was used during the request.
:param enforce_content_length:
Enforce content length checking. Body returned by server must match
value of Content-Length header, if present. Otherwise, raise error.
"""
def __init__(
self,
body: _TYPE_BODY = "",
headers: typing.Mapping[str, str] | typing.Mapping[bytes, bytes] | None = None,
status: int = 0,
version: int = 0,
reason: str | None = None,
preload_content: bool = True,
decode_content: bool = True,
original_response: _HttplibHTTPResponse | None = None,
pool: HTTPConnectionPool | None = None,
connection: HTTPConnection | None = None,
msg: _HttplibHTTPMessage | None = None,
retries: Retry | None = None,
enforce_content_length: bool = True,
request_method: str | None = None,
request_url: str | None = None,
auto_close: bool = True,
) -> None:
super().__init__(
headers=headers,
status=status,
version=version,
reason=reason,
decode_content=decode_content,
request_url=request_url,
retries=retries,
)
self.enforce_content_length = enforce_content_length
self.auto_close = auto_close
self._body = None
self._fp: _HttplibHTTPResponse | None = None
self._original_response = original_response
self._fp_bytes_read = 0
self.msg = msg
if body and isinstance(body, (str, bytes)):
self._body = body
self._pool = pool
self._connection = connection
if hasattr(body, "read"):
self._fp = body # type: ignore[assignment]
# Are we using the chunked-style of transfer encoding?
self.chunk_left: int | None = None
# Determine length of response
self.length_remaining = self._init_length(request_method)
# Used to return the correct amount of bytes for partial read()s
self._decoded_buffer = BytesQueueBuffer()
# If requested, preload the body.
if preload_content and not self._body:
self._body = self.read(decode_content=decode_content)
def release_conn(self) -> None:
if not self._pool or not self._connection:
return None
self._pool._put_conn(self._connection)
self._connection = None
def drain_conn(self) -> None:
"""
Read and discard any remaining HTTP response data in the response connection.
Unread data in the HTTPResponse connection blocks the connection from being released back to the pool.
"""
try:
self.read()
except (HTTPError, OSError, BaseSSLError, HTTPException):
pass
@property
def data(self) -> bytes:
# For backwards-compat with earlier urllib3 0.4 and earlier.
if self._body:
return self._body # type: ignore[return-value]
if self._fp:
return self.read(cache_content=True)
return None # type: ignore[return-value]
@property
def connection(self) -> HTTPConnection | None:
return self._connection
def isclosed(self) -> bool:
return is_fp_closed(self._fp)
def tell(self) -> int:
"""
Obtain the number of bytes pulled over the wire so far. May differ from
the amount of content returned by :meth:``urllib3.response.HTTPResponse.read``
if bytes are encoded on the wire (e.g, compressed).
"""
return self._fp_bytes_read
def _init_length(self, request_method: str | None) -> int | None:
"""
Set initial length value for Response content if available.
"""
length: int | None
content_length: str | None = self.headers.get("content-length")
if content_length is not None:
if self.chunked:
# This Response will fail with an IncompleteRead if it can't be
# received as chunked. This method falls back to attempt reading
# the response before raising an exception.
log.warning(
"Received response with both Content-Length and "
"Transfer-Encoding set. This is expressly forbidden "
"by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
"attempting to process response as Transfer-Encoding: "
"chunked."
)
return None
try:
# RFC 7230 section 3.3.2 specifies multiple content lengths can
# be sent in a single Content-Length header
# (e.g. Content-Length: 42, 42). This line ensures the values
# are all valid ints and that as long as the `set` length is 1,
# all values are the same. Otherwise, the header is invalid.
lengths = {int(val) for val in content_length.split(",")}
if len(lengths) > 1:
raise InvalidHeader(
"Content-Length contained multiple "
"unmatching values (%s)" % content_length
)
length = lengths.pop()
except ValueError:
length = None
else:
if length < 0:
length = None
else: # if content_length is None
length = None
# Convert status to int for comparison
# In some cases, httplib returns a status of "_UNKNOWN"
try:
status = int(self.status)
except ValueError:
status = 0
# Check for responses that shouldn't include a body
if status in (204, 304) or 100 <= status < 200 or request_method == "HEAD":
length = 0
return length
@contextmanager
def _error_catcher(self) -> typing.Generator[None, None, None]:
"""
Catch low-level python exceptions, instead re-raising urllib3
variants, so that low-level exceptions are not leaked in the
high-level api.
On exit, release the connection back to the pool.
"""
clean_exit = False
try:
try:
yield
except SocketTimeout as e:
# FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
# there is yet no clean way to get at it from this context.
raise ReadTimeoutError(self._pool, None, "Read timed out.") from e # type: ignore[arg-type]
except BaseSSLError as e:
# FIXME: Is there a better way to differentiate between SSLErrors?
if "read operation timed out" not in str(e):
# SSL errors related to framing/MAC get wrapped and reraised here
raise SSLError(e) from e
raise ReadTimeoutError(self._pool, None, "Read timed out.") from e # type: ignore[arg-type]
except (HTTPException, OSError) as e:
# This includes IncompleteRead.
raise ProtocolError(f"Connection broken: {e!r}", e) from e
# If no exception is thrown, we should avoid cleaning up
# unnecessarily.
clean_exit = True
finally:
# If we didn't terminate cleanly, we need to throw away our
# connection.
if not clean_exit:
# The response may not be closed but we're not going to use it
# anymore so close it now to ensure that the connection is
# released back to the pool.
if self._original_response:
self._original_response.close()
# Closing the response may not actually be sufficient to close
# everything, so if we have a hold of the connection close that
# too.
if self._connection:
self._connection.close()
# If we hold the original response but it's closed now, we should
# return the connection back to the pool.
if self._original_response and self._original_response.isclosed():
self.release_conn()
def _fp_read(self, amt: int | None = None) -> bytes:
"""
Read a response with the thought that reading the number of bytes
larger than can fit in a 32-bit int at a time via SSL in some
known cases leads to an overflow error that has to be prevented
if `amt` or `self.length_remaining` indicate that a problem may
happen.
The known cases:
* 3.8 <= CPython < 3.9.7 because of a bug
https://github.com/urllib3/urllib3/issues/2513#issuecomment-1152559900.
* urllib3 injected with pyOpenSSL-backed SSL-support.
* CPython < 3.10 only when `amt` does not fit 32-bit int.
"""
assert self._fp
c_int_max = 2**31 - 1
if (
(
(amt and amt > c_int_max)
or (self.length_remaining and self.length_remaining > c_int_max)
)
and not util.IS_SECURETRANSPORT
and (util.IS_PYOPENSSL or sys.version_info < (3, 10))
):
buffer = io.BytesIO()
# Besides `max_chunk_amt` being a maximum chunk size, it
# affects memory overhead of reading a response by this
# method in CPython.
# `c_int_max` equal to 2 GiB - 1 byte is the actual maximum
# chunk size that does not lead to an overflow error, but
# 256 MiB is a compromise.
max_chunk_amt = 2**28
while amt is None or amt != 0:
if amt is not None:
chunk_amt = min(amt, max_chunk_amt)
amt -= chunk_amt
else:
chunk_amt = max_chunk_amt
data = self._fp.read(chunk_amt)
if not data:
break
buffer.write(data)
del data # to reduce peak memory usage by `max_chunk_amt`.
return buffer.getvalue()
else:
# StringIO doesn't like amt=None
return self._fp.read(amt) if amt is not None else self._fp.read()
def _raw_read(
self,
amt: int | None = None,
) -> bytes:
"""
Reads `amt` of bytes from the socket.
"""
if self._fp is None:
return None # type: ignore[return-value]
fp_closed = getattr(self._fp, "closed", False)
with self._error_catcher():
data = self._fp_read(amt) if not fp_closed else b""
if amt is not None and amt != 0 and not data:
# Platform-specific: Buggy versions of Python.
# Close the connection when no data is returned
#
# This is redundant to what httplib/http.client _should_
# already do. However, versions of python released before
# December 15, 2012 (http://bugs.python.org/issue16298) do
# not properly close the connection in all cases. There is
# no harm in redundantly calling close.
self._fp.close()
if (
self.enforce_content_length
and self.length_remaining is not None
and self.length_remaining != 0
):
# This is an edge case that httplib failed to cover due
# to concerns of backward compatibility. We're
# addressing it here to make sure IncompleteRead is
# raised during streaming, so all calls with incorrect
# Content-Length are caught.
raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
if data:
self._fp_bytes_read += len(data)
if self.length_remaining is not None:
self.length_remaining -= len(data)
return data
def read(
self,
amt: int | None = None,
decode_content: bool | None = None,
cache_content: bool = False,
) -> bytes:
"""
Similar to :meth:`http.client.HTTPResponse.read`, but with two additional
parameters: ``decode_content`` and ``cache_content``.
:param amt:
How much of the content to read. If specified, caching is skipped
because it doesn't make sense to cache partial content as the full
response.
:param decode_content:
If True, will attempt to decode the body based on the
'content-encoding' header.
:param cache_content:
If True, will save the returned data such that the same result is
returned despite of the state of the underlying file object. This
is useful if you want the ``.data`` property to continue working
after having ``.read()`` the file object. (Overridden if ``amt`` is
set.)
"""
self._init_decoder()
if decode_content is None:
decode_content = self.decode_content
if amt is not None:
cache_content = False
if len(self._decoded_buffer) >= amt:
return self._decoded_buffer.get(amt)
data = self._raw_read(amt)
flush_decoder = False
if amt is None:
flush_decoder = True
elif amt != 0 and not data:
flush_decoder = True
if not data and len(self._decoded_buffer) == 0:
return data
if amt is None:
data = self._decode(data, decode_content, flush_decoder)
if cache_content:
self._body = data
else:
# do not waste memory on buffer when not decoding
if not decode_content:
if self._has_decoded_content:
raise RuntimeError(
"Calling read(decode_content=False) is not supported after "
"read(decode_content=True) was called."
)
return data
decoded_data = self._decode(data, decode_content, flush_decoder)
self._decoded_buffer.put(decoded_data)
while len(self._decoded_buffer) < amt and data:
# TODO make sure to initially read enough data to get past the headers
# For example, the GZ file header takes 10 bytes, we don't want to read
# it one byte at a time
data = self._raw_read(amt)
decoded_data = self._decode(data, decode_content, flush_decoder)
self._decoded_buffer.put(decoded_data)
data = self._decoded_buffer.get(amt)
return data
def stream(
self, amt: int | None = 2**16, decode_content: bool | None = None
) -> typing.Generator[bytes, None, None]:
"""
A generator wrapper for the read() method. A call will block until
``amt`` bytes have been read from the connection or until the
connection is closed.
:param amt:
How much of the content to read. The generator will return up to
much data per iteration, but may return less. This is particularly
likely when using compressed data. However, the empty string will
never be returned.
:param decode_content:
If True, will attempt to decode the body based on the
'content-encoding' header.
"""
if self.chunked and self.supports_chunked_reads():
yield from self.read_chunked(amt, decode_content=decode_content)
else:
while not is_fp_closed(self._fp) or len(self._decoded_buffer) > 0:
data = self.read(amt=amt, decode_content=decode_content)
if data:
yield data
# Overrides from io.IOBase
def readable(self) -> bool:
return True
def close(self) -> None:
if not self.closed and self._fp:
self._fp.close()
if self._connection:
self._connection.close()
if not self.auto_close:
io.IOBase.close(self)
@property
def closed(self) -> bool:
if not self.auto_close:
return io.IOBase.closed.__get__(self) # type: ignore[no-any-return]
elif self._fp is None:
return True
elif hasattr(self._fp, "isclosed"):
return self._fp.isclosed()
elif hasattr(self._fp, "closed"):
return self._fp.closed
else:
return True
def fileno(self) -> int:
if self._fp is None:
raise OSError("HTTPResponse has no file to get a fileno from")
elif hasattr(self._fp, "fileno"):
return self._fp.fileno()
else:
raise OSError(
"The file-like object this HTTPResponse is wrapped "
"around has no file descriptor"
)
def flush(self) -> None:
if (
self._fp is not None
and hasattr(self._fp, "flush")
and not getattr(self._fp, "closed", False)
):
return self._fp.flush()
def supports_chunked_reads(self) -> bool:
"""
Checks if the underlying file-like object looks like a
:class:`http.client.HTTPResponse` object. We do this by testing for
the fp attribute. If it is present we assume it returns raw chunks as
processed by read_chunked().
"""
return hasattr(self._fp, "fp")
def _update_chunk_length(self) -> None:
# First, we'll figure out length of a chunk and then
# we'll try to read it from socket.
if self.chunk_left is not None:
return None
line = self._fp.fp.readline() # type: ignore[union-attr]
line = line.split(b";", 1)[0]
try:
self.chunk_left = int(line, 16)
except ValueError:
# Invalid chunked protocol response, abort.
self.close()
raise InvalidChunkLength(self, line) from None
def _handle_chunk(self, amt: int | None) -> bytes:
returned_chunk = None
if amt is None:
chunk = self._fp._safe_read(self.chunk_left) # type: ignore[union-attr]
returned_chunk = chunk
self._fp._safe_read(2) # type: ignore[union-attr] # Toss the CRLF at the end of the chunk.
self.chunk_left = None
elif self.chunk_left is not None and amt < self.chunk_left:
value = self._fp._safe_read(amt) # type: ignore[union-attr]
self.chunk_left = self.chunk_left - amt
returned_chunk = value
elif amt == self.chunk_left:
value = self._fp._safe_read(amt) # type: ignore[union-attr]
self._fp._safe_read(2) # type: ignore[union-attr] # Toss the CRLF at the end of the chunk.
self.chunk_left = None
returned_chunk = value
else: # amt > self.chunk_left
returned_chunk = self._fp._safe_read(self.chunk_left) # type: ignore[union-attr]
self._fp._safe_read(2) # type: ignore[union-attr] # Toss the CRLF at the end of the chunk.
self.chunk_left = None
return returned_chunk # type: ignore[no-any-return]
def read_chunked(
self, amt: int | None = None, decode_content: bool | None = None
) -> typing.Generator[bytes, None, None]:
"""
Similar to :meth:`HTTPResponse.read`, but with an additional
parameter: ``decode_content``.
:param amt:
How much of the content to read. If specified, caching is skipped
because it doesn't make sense to cache partial content as the full
response.
:param decode_content:
If True, will attempt to decode the body based on the
'content-encoding' header.
"""
self._init_decoder()
# FIXME: Rewrite this method and make it a class with a better structured logic.
if not self.chunked:
raise ResponseNotChunked(
"Response is not chunked. "
"Header 'transfer-encoding: chunked' is missing."
)
if not self.supports_chunked_reads():
raise BodyNotHttplibCompatible(
"Body should be http.client.HTTPResponse like. "
"It should have have an fp attribute which returns raw chunks."
)
with self._error_catcher():
# Don't bother reading the body of a HEAD request.
if self._original_response and is_response_to_head(self._original_response):
self._original_response.close()
return None
# If a response is already read and closed
# then return immediately.
if self._fp.fp is None: # type: ignore[union-attr]
return None
while True:
self._update_chunk_length()
if self.chunk_left == 0:
break
chunk = self._handle_chunk(amt)
decoded = self._decode(
chunk, decode_content=decode_content, flush_decoder=False
)
if decoded:
yield decoded
if decode_content:
# On CPython and PyPy, we should never need to flush the
# decoder. However, on Jython we *might* need to, so
# lets defensively do it anyway.
decoded = self._flush_decoder()
if decoded: # Platform-specific: Jython.
yield decoded
# Chunk content ends with \r\n: discard it.
while self._fp is not None:
line = self._fp.fp.readline()
if not line:
# Some sites may not end with '\r\n'.
break
if line == b"\r\n":
break
# We read everything; close the "file".
if self._original_response:
self._original_response.close()
@property
def url(self) -> str | None:
"""
Returns the URL that was the source of this response.
If the request that generated this response redirected, this method
will return the final redirect location.
"""
return self._request_url
@url.setter
def url(self, url: str) -> None:
self._request_url = url
def __iter__(self) -> typing.Iterator[bytes]:
buffer: list[bytes] = []
for chunk in self.stream(decode_content=True):
if b"\n" in chunk:
chunks = chunk.split(b"\n")
yield b"".join(buffer) + chunks[0] + b"\n"
for x in chunks[1:-1]:
yield x + b"\n"
if chunks[-1]:
buffer = [chunks[-1]]
else:
buffer = []
else:
buffer.append(chunk)
if buffer:
yield b"".join(buffer)
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