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File Name : response.py

from __future__ import absolute_import
from contextlib import contextmanager
import collections
import zlib
import io
import logging
import sys
import warnings
from socket import timeout as SocketTimeout
from socket import error as SocketError

from ._collections import HTTPHeaderDict
from .exceptions import (
    BodyNotHttplibCompatible, ProtocolError, DecodeError, ReadTimeoutError,
    ResponseNotChunked, IncompleteRead, InvalidHeader, DependencyWarning
)
from .packages.six import string_types as basestring, PY3
from .packages.six.moves import http_client as httplib
from .connection import HTTPException, BaseSSLError
from .util.response import is_fp_closed, is_response_to_head

log = logging.getLogger(__name__)

class DeflateDecoder(object):

def __init__(self):
        self._first_try = True
        self._first_try_data = b""
        self._unfed_data = b""
        self._obj = zlib.decompressobj()

def __getattr__(self, name):
        return getattr(self._obj, name)

def decompress(self, data, max_length=-1):
        data = self._unfed_data + data
        self._unfed_data = b""
        if not data and not self._obj.unconsumed_tail:
            return data
        original_max_length = max_length
        if original_max_length < 0:
            max_length = 0
        elif original_max_length == 0:
            # We should not pass 0 to the zlib decompressor because 0 is
            # the default value that will make zlib decompress without a
            # length limit.
            # Data should be stored for subsequent calls.
            self._unfed_data = data
            return b""

# Subsequent calls always reuse `self._obj`. zlib requires
        # passing the unconsumed tail if decompression is to continue.
        if not self._first_try:
            return self._obj.decompress(
                self._obj.unconsumed_tail + data, max_length=max_length
            )

# First call tries with RFC 1950 ZLIB format.
        self._first_try_data += data
        try:
            decompressed = self._obj.decompress(data, max_length=max_length)
            if decompressed:
                self._first_try = False
                self._first_try_data = b""
            return decompressed
        # On failure, it falls back to RFC 1951 DEFLATE format.
        except zlib.error:
            self._first_try = False
            self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
            try:
                return self.decompress(
                    self._first_try_data, max_length=original_max_length
                )
            finally:
                self._first_try_data = b""

@property
    def has_unconsumed_tail(self):
        return bool(self._unfed_data) or (
            bool(self._obj.unconsumed_tail) and not self._first_try
        )

class GzipDecoderState(object):

FIRST_MEMBER = 0
    OTHER_MEMBERS = 1
    SWALLOW_DATA = 2

class GzipDecoder(object):

def __init__(self):
        self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
        self._state = GzipDecoderState.FIRST_MEMBER
        self._unconsumed_tail = b""

def __getattr__(self, name):
        return getattr(self._obj, name)

def decompress(self, data, max_length=-1):
        ret = bytearray()
        if self._state == GzipDecoderState.SWALLOW_DATA:
            return bytes(ret)

if max_length == 0:
            # We should not pass 0 to the zlib decompressor because 0 is
            # the default value that will make zlib decompress without a
            # length limit.
            # Data should be stored for subsequent calls.
            self._unconsumed_tail += data
            return b""

# zlib requires passing the unconsumed tail to the subsequent
        # call if decompression is to continue.
        data = self._unconsumed_tail + data
        if not data and self._obj.eof:
            return bytes(ret)

while True:
            try:
                ret += self._obj.decompress(
                    data, max_length=max(max_length - len(ret), 0)
                )
            except zlib.error:
                previous_state = self._state
                # Ignore data after the first error
                self._state = GzipDecoderState.SWALLOW_DATA
                self._unconsumed_tail = b""
                if previous_state == GzipDecoderState.OTHER_MEMBERS:
                    # Allow trailing garbage acceptable in other gzip clients
                    return bytes(ret)
                raise

self._unconsumed_tail = data = (
                self._obj.unconsumed_tail or self._obj.unused_data
            )
            if max_length > 0 and len(ret) >= max_length:
                break

if not data:
                return bytes(ret)
            # When the end of a gzip member is reached, a new decompressor
            # must be created for unused (possibly future) data.
            if self._obj.eof:
                self._state = GzipDecoderState.OTHER_MEMBERS
                self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)

return bytes(ret)

@property
    def has_unconsumed_tail(self):
        return bool(self._unconsumed_tail)

class MultiDecoder(object):
    """
    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.
    """

# Maximum allowed number of chained HTTP encodings in the
    # Content-Encoding header.
    max_decode_links = 5

def __init__(self, modes):
        encodings = [m.strip() for m in modes.split(",")]
        if len(encodings) > self.max_decode_links:
            raise DecodeError(
                "Too many content encodings in the chain: "
                f"{len(encodings)} > {self.max_decode_links}"
            )
        self._decoders = [_get_decoder(e) for e in encodings]

def flush(self):
        return self._decoders[0].flush()

def decompress(self, data, max_length=-1):
        if max_length <= 0:
            for d in reversed(self._decoders):
                data = d.decompress(data)
            return data

ret = bytearray()
        # Every while loop iteration goes through all decoders once.
        # It exits when enough data is read or no more data can be read.
        # It is possible that the while loop iteration does not produce
        # any data because we retrieve up to `max_length` from every
        # decoder, and the amount of bytes may be insufficient for the
        # next decoder to produce enough/any output.
        while True:
            any_data = False
            for d in reversed(self._decoders):
                data = d.decompress(data, max_length=max_length - len(ret))
                if data:
                    any_data = True
                # We should not break when no data is returned because
                # next decoders may produce data even with empty input.
            ret += data
            if not any_data or len(ret) >= max_length:
                return bytes(ret)
            data = b""

@property
    def has_unconsumed_tail(self):
        return any(d.has_unconsumed_tail for d in self._decoders)

def _get_decoder(mode):
    if ',' in mode:
        return MultiDecoder(mode)

if mode == 'gzip':
        return GzipDecoder()

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()
    """

def __init__(self):
        self.buffer = collections.deque()
        self._size = 0

def __len__(self):
        return self._size

def put(self, data):
        self.buffer.append(data)
        self._size += len(data)

def get(self, n):
        if n == 0:
            return b""
        if not self.buffer:
            raise RuntimeError("buffer is empty")
        elif n < 0:
            raise ValueError("n should be > 0")

if len(self.buffer[0]) == n and isinstance(self.buffer[0], bytes):
            self._size -= n
            return self.buffer.popleft()

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 HTTPResponse(io.IOBase):
    """
    HTTP Response container.

Backwards-compatible to httplib's 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 httplib.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 httplib.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.
    """

CONTENT_DECODERS = ['gzip', 'deflate']
    REDIRECT_STATUSES = [301, 302, 303, 307, 308]

def __init__(self, body='', headers=None, status=0, version=0, reason=None,
                 strict=0, preload_content=True, decode_content=True,
                 original_response=None, pool=None, connection=None, msg=None,
                 retries=None, enforce_content_length=False,
                 request_method=None, request_url=None):

if isinstance(headers, HTTPHeaderDict):
            self.headers = headers
        else:
            self.headers = HTTPHeaderDict(headers)
        self.status = status
        self.version = version
        self.reason = reason
        self.strict = strict
        self.decode_content = decode_content
        self._has_decoded_content = False
        self.retries = retries
        self.enforce_content_length = enforce_content_length

self._decoder = None
        self._body = None
        self._fp = None
        self._original_response = original_response
        self._fp_bytes_read = 0
        self.msg = msg
        self._request_url = request_url

if body and isinstance(body, (basestring, bytes)):
            self._body = body

self._pool = pool
        self._connection = connection

if hasattr(body, 'read'):
            self._fp = body

# Are we using the chunked-style of transfer encoding?
        self.chunked = False
        self.chunk_left = None
        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

# 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 get_redirect_location(self):
        """
        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

def release_conn(self):
        if not self._pool or not self._connection:
            return

self._pool._put_conn(self._connection)
        self._connection = None

@property
    def data(self):
        # For backwords-compat with earlier urllib3 0.4 and earlier.
        if self._body:
            return self._body

if self._fp:
            return self.read(cache_content=True)

@property
    def connection(self):
        return self._connection

def isclosed(self):
        return is_fp_closed(self._fp)

def tell(self):
        """
        Obtain the number of bytes pulled over the wire so far. May differ from
        the amount of content returned by :meth:``HTTPResponse.read`` if bytes
        are encoded on the wire (e.g, compressed).
        """
        return self._fp_bytes_read

def _init_length(self, request_method):
        """
        Set initial length value for Response content if available.
        """
        length = self.headers.get('content-length')

if 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 = set([int(val) for val in length.split(',')])
                if len(lengths) > 1:
                    raise InvalidHeader("Content-Length contained multiple "
                                        "unmatching values (%s)" % length)
                length = lengths.pop()
            except ValueError:
                length = None
            else:
                if length < 0:
                    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

def _init_decoder(self):
        """
        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 len(encodings):
                    self._decoder = _get_decoder(content_encoding)

def _decode(self, data, decode_content, flush_decoder, max_length=None):
        """
        Decode the data passed in and potentially flush the decoder.
        """
        if not decode_content and self._has_decoded_content:
            raise RuntimeError(
                "Calling read(decode_content=False) is not supported after "
                "read(decode_content=True) was called."
            )

if max_length is None or flush_decoder:
            max_length = -1

try:
            if decode_content and self._decoder:
                data = self._decoder.decompress(data, max_length=max_length)
                self._has_decoded_content = True
        except (IOError, zlib.error) 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)

if flush_decoder and decode_content:
            data += self._flush_decoder()

return data

def _flush_decoder(self):
        """
        Flushes the decoder. Should only be called if the decoder is actually
        being used.
        """
        if self._decoder:
            buf = self._decoder.decompress(b'')
            return buf + self._decoder.flush()

return b''

@contextmanager
    def _error_catcher(self):
        """
        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:
                # 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.')

except BaseSSLError as e:
                # FIXME: Is there a better way to differentiate between SSLErrors?
                if 'read operation timed out' not in str(e):  # Defensive:
                    # This shouldn't happen but just in case we're missing an edge
                    # case, let's avoid swallowing SSL errors.
                    raise

raise ReadTimeoutError(self._pool, None, 'Read timed out.')

except (HTTPException, SocketError) as e:
                # This includes IncompleteRead.
                raise ProtocolError('Connection broken: %r' % e, 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 _raw_read(self, amt=None):
        """
        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():
            if amt is None:
                # cStringIO doesn't like amt=None
                data = self._fp.read() if not fp_closed else b""
            else:
                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=None, decode_content=None, cache_content=False):
        """
        Similar to :meth:`httplib.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 self._decoder and self._decoder.has_unconsumed_tail:
                decoded_data = self._decode(
                    b"",
                    decode_content,
                    flush_decoder=False,
                    max_length=amt - len(self._decoded_buffer),
                )
                self._decoded_buffer.put(decoded_data)
            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
            and not (self._decoder and self._decoder.has_unconsumed_tail)
        ):
            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,
                max_length=amt - len(self._decoded_buffer),
            )
            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,
                    max_length=amt - len(self._decoded_buffer),
                )
                self._decoded_buffer.put(decoded_data)
            data = self._decoded_buffer.get(amt)

return data

def stream(self, amt=2**16, decode_content=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():
            for line in self.read_chunked(amt, decode_content=decode_content):
                yield line
        else:
            while (
                not is_fp_closed(self._fp)
                or len(self._decoded_buffer) > 0
                or (self._decoder and self._decoder.has_unconsumed_tail)
            ):
                data = self.read(amt=amt, decode_content=decode_content)

if data:
                    yield data

@classmethod
    def from_httplib(ResponseCls, r, **response_kw):
        """
        Given an :class:`httplib.HTTPResponse` instance ``r``, return a
        corresponding :class:`urllib3.response.HTTPResponse` object.

Remaining parameters are passed to the HTTPResponse constructor, along
        with ``original_response=r``.
        """
        headers = r.msg

if not isinstance(headers, HTTPHeaderDict):
            if PY3:  # Python 3
                headers = HTTPHeaderDict(headers.items())
            else:  # Python 2
                headers = HTTPHeaderDict.from_httplib(headers)

# HTTPResponse objects in Python 3 don't have a .strict attribute
        strict = getattr(r, 'strict', 0)
        resp = ResponseCls(body=r,
                           headers=headers,
                           status=r.status,
                           version=r.version,
                           reason=r.reason,
                           strict=strict,
                           original_response=r,
                           **response_kw)
        return resp

# Backwards-compatibility methods for httplib.HTTPResponse
    def getheaders(self):
        return self.headers

def getheader(self, name, default=None):
        return self.headers.get(name, default)

# Backwards compatibility for http.cookiejar
    def info(self):
        return self.headers

# Overrides from io.IOBase
    def close(self):
        if not self.closed:
            self._fp.close()

if self._connection:
            self._connection.close()

@property
    def closed(self):
        if 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):
        if self._fp is None:
            raise IOError("HTTPResponse has no file to get a fileno from")
        elif hasattr(self._fp, "fileno"):
            return self._fp.fileno()
        else:
            raise IOError("The file-like object this HTTPResponse is wrapped "
                          "around has no file descriptor")

def flush(self):
        if self._fp is not None and hasattr(self._fp, 'flush'):
            return self._fp.flush()

def readable(self):
        # This method is required for `io` module compatibility.
        return True

def readinto(self, b):
        # This method is required for `io` module compatibility.
        temp = self.read(len(b))
        if len(temp) == 0:
            return 0
        else:
            b[:len(temp)] = temp
            return len(temp)

def supports_chunked_reads(self):
        """
        Checks if the underlying file-like object looks like a
        httplib.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):
        # 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
        line = self._fp.fp.readline()
        line = line.split(b';', 1)[0]
        try:
            self.chunk_left = int(line, 16)
        except ValueError:
            # Invalid chunked protocol response, abort.
            self.close()
            raise httplib.IncompleteRead(line)

def _handle_chunk(self, amt):
        returned_chunk = None
        if amt is None:
            chunk = self._fp._safe_read(self.chunk_left)
            returned_chunk = chunk
            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
            self.chunk_left = None
        elif amt < self.chunk_left:
            value = self._fp._safe_read(amt)
            self.chunk_left = self.chunk_left - amt
            returned_chunk = value
        elif amt == self.chunk_left:
            value = self._fp._safe_read(amt)
            self._fp._safe_read(2)  # 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)
            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
            self.chunk_left = None
        return returned_chunk

def read_chunked(self, amt=None, decode_content=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 httplib.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

# If a response is already read and closed
            # then return immediately.
            if self._fp.fp is None:
                return

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, max_length=amt)
                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 True:
                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()

def geturl(self):
        """
        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.
        """
        if self.retries is not None and len(self.retries.history):
            return self.retries.history[-1].redirect_location
        else:
            return self._request_url

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	0/0	0755	2026-01-30 05:00:48
..	dir	-	0/0	0755	2026-04-28 05:55:45
__pycache__	dir	-	0/0	0755	2026-01-30 05:00:48
contrib	dir	-	0/0	0755	2026-01-30 05:00:48
packages	dir	-	0/0	0755	2026-01-30 05:00:48
util	dir	-	0/0	0755	2026-01-30 05:00:48
__init__.py	text/plain	2.66 KB	0/0	0644	2019-04-17 05:46:22
_collections.py	text/x-script.python	11.04 KB	0/0	0644	2026-01-28 10:03:31
connection.py	text/x-script.python	14.01 KB	0/0	0644	2026-01-28 10:03:31
connectionpool.py	text/x-script.python	34.77 KB	0/0	0644	2026-01-28 10:03:31
exceptions.py	text/x-script.python	6.45 KB	0/0	0644	2019-04-17 05:46:22
fields.py	text/x-script.python	5.8 KB	0/0	0644	2019-04-17 05:46:22
filepost.py	text/x-script.python	2.38 KB	0/0	0644	2019-04-17 05:46:22
poolmanager.py	text/x-script.python	16.82 KB	0/0	0644	2026-01-28 10:03:31
request.py	text/x-script.python	5.85 KB	0/0	0644	2019-04-17 05:46:22
response.py	text/x-script.python	33.64 KB	0/0	0644	2026-01-28 10:03:31

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