forked from urllib3/urllib3
/
test_response.py
779 lines (621 loc) · 25.3 KB
/
test_response.py
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import socket
import zlib
from io import BytesIO, BufferedReader
import pytest
import mock
from urllib3.response import HTTPResponse
from urllib3.exceptions import (
DecodeError, ResponseNotChunked, ProtocolError, InvalidHeader
)
from urllib3.packages.six.moves import http_client as httplib
from urllib3.util.retry import Retry, RequestHistory
from urllib3.util.response import is_fp_closed
from base64 import b64decode
# A known random (i.e, not-too-compressible) payload generated with:
# "".join(random.choice(string.printable) for i in xrange(512))
# .encode("zlib").encode("base64")
# Randomness in tests == bad, and fixing a seed may not be sufficient.
ZLIB_PAYLOAD = b64decode(b"""\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""")
@pytest.fixture
def sock():
s = socket.socket()
yield s
s.close()
class TestLegacyResponse(object):
def test_getheaders(self):
headers = {'host': 'example.com'}
r = HTTPResponse(headers=headers)
assert r.getheaders() == headers
def test_getheader(self):
headers = {'host': 'example.com'}
r = HTTPResponse(headers=headers)
assert r.getheader('host') == 'example.com'
class TestResponse(object):
def test_cache_content(self):
r = HTTPResponse('foo')
assert r.data == 'foo'
assert r._body == 'foo'
def test_default(self):
r = HTTPResponse()
assert r.data is None
def test_none(self):
r = HTTPResponse(None)
assert r.data is None
def test_preload(self):
fp = BytesIO(b'foo')
r = HTTPResponse(fp, preload_content=True)
assert fp.tell() == len(b'foo')
assert r.data == b'foo'
def test_no_preload(self):
fp = BytesIO(b'foo')
r = HTTPResponse(fp, preload_content=False)
assert fp.tell() == 0
assert r.data == b'foo'
assert fp.tell() == len(b'foo')
def test_decode_bad_data(self):
fp = BytesIO(b'\x00' * 10)
with pytest.raises(DecodeError):
HTTPResponse(fp, headers={'content-encoding': 'deflate'})
def test_reference_read(self):
fp = BytesIO(b'foo')
r = HTTPResponse(fp, preload_content=False)
assert r.read(1) == b'f'
assert r.read(2) == b'oo'
assert r.read() == b''
assert r.read() == b''
def test_decode_deflate(self):
data = zlib.compress(b'foo')
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'deflate'})
assert r.data == b'foo'
def test_decode_deflate_case_insensitve(self):
data = zlib.compress(b'foo')
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'DeFlAtE'})
assert r.data == b'foo'
def test_chunked_decoding_deflate(self):
data = zlib.compress(b'foo')
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
assert r.read(3) == b''
# Buffer in case we need to switch to the raw stream
assert r._decoder._data is not None
assert r.read(1) == b'f'
# Now that we've decoded data, we just stream through the decoder
assert r._decoder._data is None
assert r.read(2) == b'oo'
assert r.read() == b''
assert r.read() == b''
def test_chunked_decoding_deflate2(self):
compress = zlib.compressobj(6, zlib.DEFLATED, -zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
assert r.read(1) == b''
assert r.read(1) == b'f'
# Once we've decoded data, we just stream to the decoder; no buffering
assert r._decoder._data is None
assert r.read(2) == b'oo'
assert r.read() == b''
assert r.read() == b''
def test_chunked_decoding_gzip(self):
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'gzip'},
preload_content=False)
assert r.read(11) == b''
assert r.read(1) == b'f'
assert r.read(2) == b'oo'
assert r.read() == b''
assert r.read() == b''
def test_decode_gzip_multi_member(self):
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
data = data * 3
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'gzip'})
assert r.data == b'foofoofoo'
def test_decode_gzip_error(self):
fp = BytesIO(b'foo')
with pytest.raises(DecodeError):
HTTPResponse(fp, headers={'content-encoding': 'gzip'})
def test_decode_gzip_swallow_garbage(self):
# When data comes from multiple calls to read(), data after
# the first zlib error (here triggered by garbage) should be
# ignored.
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
data = data * 3 + b'foo'
fp = BytesIO(data)
r = HTTPResponse(
fp, headers={'content-encoding': 'gzip'}, preload_content=False)
ret = b''
for _ in range(100):
ret += r.read(1)
if r.closed:
break
assert ret == b'foofoofoo'
def test_chunked_decoding_gzip_swallow_garbage(self):
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
data = data * 3 + b'foo'
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'gzip'})
assert r.data == b'foofoofoo'
def test_body_blob(self):
resp = HTTPResponse(b'foo')
assert resp.data == b'foo'
assert resp.closed
def test_io(self, sock):
fp = BytesIO(b'foo')
resp = HTTPResponse(fp, preload_content=False)
assert not resp.closed
assert resp.readable()
assert not resp.writable()
with pytest.raises(IOError):
resp.fileno()
resp.close()
assert resp.closed
# Try closing with an `httplib.HTTPResponse`, because it has an
# `isclosed` method.
try:
hlr = httplib.HTTPResponse(sock)
resp2 = HTTPResponse(hlr, preload_content=False)
assert not resp2.closed
resp2.close()
assert resp2.closed
finally:
hlr.close()
# also try when only data is present.
resp3 = HTTPResponse('foodata')
with pytest.raises(IOError):
resp3.fileno()
resp3._fp = 2
# A corner case where _fp is present but doesn't have `closed`,
# `isclosed`, or `fileno`. Unlikely, but possible.
assert resp3.closed
with pytest.raises(IOError):
resp3.fileno()
def test_io_closed_consistently(self, sock):
try:
hlr = httplib.HTTPResponse(sock)
hlr.fp = BytesIO(b'foo')
hlr.chunked = 0
hlr.length = 3
with HTTPResponse(hlr, preload_content=False) as resp:
assert not resp.closed
assert not resp._fp.isclosed()
assert not is_fp_closed(resp._fp)
assert not resp.isclosed()
resp.read()
assert resp.closed
assert resp._fp.isclosed()
assert is_fp_closed(resp._fp)
assert resp.isclosed()
finally:
hlr.close()
def test_io_bufferedreader(self):
fp = BytesIO(b'foo')
resp = HTTPResponse(fp, preload_content=False)
br = BufferedReader(resp)
assert br.read() == b'foo'
br.close()
assert resp.closed
b = b'fooandahalf'
fp = BytesIO(b)
resp = HTTPResponse(fp, preload_content=False)
br = BufferedReader(resp, 5)
br.read(1) # sets up the buffer, reading 5
assert len(fp.read()) == (len(b) - 5)
# This is necessary to make sure the "no bytes left" part of `readinto`
# gets tested.
while not br.closed:
br.read(5)
def test_streaming(self):
fp = BytesIO(b'foo')
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(2, decode_content=False)
assert next(stream) == b'fo'
assert next(stream) == b'o'
with pytest.raises(StopIteration):
next(stream)
def test_streaming_tell(self):
fp = BytesIO(b'foo')
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(2, decode_content=False)
position = 0
position += len(next(stream))
assert 2 == position
assert position == resp.tell()
position += len(next(stream))
assert 3 == position
assert position == resp.tell()
with pytest.raises(StopIteration):
next(stream)
def test_gzipped_streaming(self):
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
fp = BytesIO(data)
resp = HTTPResponse(fp, headers={'content-encoding': 'gzip'},
preload_content=False)
stream = resp.stream(2)
assert next(stream) == b'f'
assert next(stream) == b'oo'
with pytest.raises(StopIteration):
next(stream)
def test_gzipped_streaming_tell(self):
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
uncompressed_data = b'foo'
data = compress.compress(uncompressed_data)
data += compress.flush()
fp = BytesIO(data)
resp = HTTPResponse(fp, headers={'content-encoding': 'gzip'},
preload_content=False)
stream = resp.stream()
# Read everything
payload = next(stream)
assert payload == uncompressed_data
assert len(data) == resp.tell()
with pytest.raises(StopIteration):
next(stream)
def test_deflate_streaming_tell_intermediate_point(self):
# Ensure that ``tell()`` returns the correct number of bytes when
# part-way through streaming compressed content.
NUMBER_OF_READS = 10
class MockCompressedDataReading(BytesIO):
"""
A ByteIO-like reader returning ``payload`` in ``NUMBER_OF_READS``
calls to ``read``.
"""
def __init__(self, payload, payload_part_size):
self.payloads = [
payload[i*payload_part_size:(i+1)*payload_part_size]
for i in range(NUMBER_OF_READS+1)]
assert b"".join(self.payloads) == payload
def read(self, _):
# Amount is unused.
if len(self.payloads) > 0:
return self.payloads.pop(0)
return b""
uncompressed_data = zlib.decompress(ZLIB_PAYLOAD)
payload_part_size = len(ZLIB_PAYLOAD) // NUMBER_OF_READS
fp = MockCompressedDataReading(ZLIB_PAYLOAD, payload_part_size)
resp = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
stream = resp.stream()
parts_positions = [(part, resp.tell()) for part in stream]
end_of_stream = resp.tell()
with pytest.raises(StopIteration):
next(stream)
parts, positions = zip(*parts_positions)
# Check that the payload is equal to the uncompressed data
payload = b"".join(parts)
assert uncompressed_data == payload
# Check that the positions in the stream are correct
expected = [(i+1)*payload_part_size for i in range(NUMBER_OF_READS)]
assert expected == list(positions)
# Check that the end of the stream is in the correct place
assert len(ZLIB_PAYLOAD) == end_of_stream
def test_deflate_streaming(self):
data = zlib.compress(b'foo')
fp = BytesIO(data)
resp = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
stream = resp.stream(2)
assert next(stream) == b'f'
assert next(stream) == b'oo'
with pytest.raises(StopIteration):
next(stream)
def test_deflate2_streaming(self):
compress = zlib.compressobj(6, zlib.DEFLATED, -zlib.MAX_WBITS)
data = compress.compress(b'foo')
data += compress.flush()
fp = BytesIO(data)
resp = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
stream = resp.stream(2)
assert next(stream) == b'f'
assert next(stream) == b'oo'
with pytest.raises(StopIteration):
next(stream)
def test_empty_stream(self):
fp = BytesIO(b'')
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(2, decode_content=False)
with pytest.raises(StopIteration):
next(stream)
def test_length_no_header(self):
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, preload_content=False)
assert resp.length_remaining is None
def test_length_w_valid_header(self):
headers = {"content-length": "5"}
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, headers=headers, preload_content=False)
assert resp.length_remaining == 5
def test_length_w_bad_header(self):
garbage = {'content-length': 'foo'}
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, headers=garbage, preload_content=False)
assert resp.length_remaining is None
garbage['content-length'] = "-10"
resp = HTTPResponse(fp, headers=garbage, preload_content=False)
assert resp.length_remaining is None
def test_length_when_chunked(self):
# This is expressly forbidden in RFC 7230 sec 3.3.2
# We fall back to chunked in this case and try to
# handle response ignoring content length.
headers = {'content-length': '5',
'transfer-encoding': 'chunked'}
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, headers=headers, preload_content=False)
assert resp.length_remaining is None
def test_length_with_multiple_content_lengths(self):
headers = {'content-length': '5, 5, 5'}
garbage = {'content-length': '5, 42'}
fp = BytesIO(b'abcde')
resp = HTTPResponse(fp, headers=headers, preload_content=False)
assert resp.length_remaining == 5
with pytest.raises(InvalidHeader):
HTTPResponse(fp, headers=garbage, preload_content=False)
def test_length_after_read(self):
headers = {"content-length": "5"}
# Test no defined length
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, preload_content=False)
resp.read()
assert resp.length_remaining is None
# Test our update from content-length
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, headers=headers, preload_content=False)
resp.read()
assert resp.length_remaining == 0
# Test partial read
fp = BytesIO(b'12345')
resp = HTTPResponse(fp, headers=headers, preload_content=False)
data = resp.stream(2)
next(data)
assert resp.length_remaining == 3
def test_mock_httpresponse_stream(self):
# Mock out a HTTP Request that does enough to make it through urllib3's
# read() and close() calls, and also exhausts and underlying file
# object.
class MockHTTPRequest(object):
self.fp = None
def read(self, amt):
data = self.fp.read(amt)
if not data:
self.fp = None
return data
def close(self):
self.fp = None
bio = BytesIO(b'foo')
fp = MockHTTPRequest()
fp.fp = bio
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(2)
assert next(stream) == b'fo'
assert next(stream) == b'o'
with pytest.raises(StopIteration):
next(stream)
def test_mock_transfer_encoding_chunked(self):
stream = [b"fo", b"o", b"bar"]
fp = MockChunkedEncodingResponse(stream)
r = httplib.HTTPResponse(MockSock)
r.fp = fp
resp = HTTPResponse(r, preload_content=False, headers={'transfer-encoding': 'chunked'})
for i, c in enumerate(resp.stream()):
assert c == stream[i]
def test_mock_gzipped_transfer_encoding_chunked_decoded(self):
"""Show that we can decode the gizpped and chunked body."""
def stream():
# Set up a generator to chunk the gzipped body
compress = zlib.compressobj(6, zlib.DEFLATED, 16 + zlib.MAX_WBITS)
data = compress.compress(b'foobar')
data += compress.flush()
for i in range(0, len(data), 2):
yield data[i:i+2]
fp = MockChunkedEncodingResponse(list(stream()))
r = httplib.HTTPResponse(MockSock)
r.fp = fp
headers = {'transfer-encoding': 'chunked', 'content-encoding': 'gzip'}
resp = HTTPResponse(r, preload_content=False, headers=headers)
data = b''
for c in resp.stream(decode_content=True):
data += c
assert b'foobar' == data
def test_mock_transfer_encoding_chunked_custom_read(self):
stream = [b"foooo", b"bbbbaaaaar"]
fp = MockChunkedEncodingResponse(stream)
r = httplib.HTTPResponse(MockSock)
r.fp = fp
r.chunked = True
r.chunk_left = None
resp = HTTPResponse(r, preload_content=False, headers={'transfer-encoding': 'chunked'})
expected_response = [b'fo', b'oo', b'o', b'bb', b'bb', b'aa', b'aa', b'ar']
response = list(resp.read_chunked(2))
assert expected_response == response
def test_mock_transfer_encoding_chunked_unlmtd_read(self):
stream = [b"foooo", b"bbbbaaaaar"]
fp = MockChunkedEncodingResponse(stream)
r = httplib.HTTPResponse(MockSock)
r.fp = fp
r.chunked = True
r.chunk_left = None
resp = HTTPResponse(r, preload_content=False, headers={'transfer-encoding': 'chunked'})
assert stream == list(resp.read_chunked())
def test_read_not_chunked_response_as_chunks(self):
fp = BytesIO(b'foo')
resp = HTTPResponse(fp, preload_content=False)
r = resp.read_chunked()
with pytest.raises(ResponseNotChunked):
next(r)
def test_invalid_chunks(self):
stream = [b"foooo", b"bbbbaaaaar"]
fp = MockChunkedInvalidEncoding(stream)
r = httplib.HTTPResponse(MockSock)
r.fp = fp
r.chunked = True
r.chunk_left = None
resp = HTTPResponse(r, preload_content=False, headers={'transfer-encoding': 'chunked'})
with pytest.raises(ProtocolError):
next(resp.read_chunked())
def test_chunked_response_without_crlf_on_end(self):
stream = [b"foo", b"bar", b"baz"]
fp = MockChunkedEncodingWithoutCRLFOnEnd(stream)
r = httplib.HTTPResponse(MockSock)
r.fp = fp
r.chunked = True
r.chunk_left = None
resp = HTTPResponse(r, preload_content=False, headers={'transfer-encoding': 'chunked'})
assert stream == list(resp.stream())
def test_chunked_response_with_extensions(self):
stream = [b"foo", b"bar"]
fp = MockChunkedEncodingWithExtensions(stream)
r = httplib.HTTPResponse(MockSock)
r.fp = fp
r.chunked = True
r.chunk_left = None
resp = HTTPResponse(r, preload_content=False, headers={'transfer-encoding': 'chunked'})
assert stream == list(resp.stream())
def test_chunked_head_response(self):
r = httplib.HTTPResponse(MockSock, method='HEAD')
r.chunked = True
r.chunk_left = None
resp = HTTPResponse('',
preload_content=False,
headers={'transfer-encoding': 'chunked'},
original_response=r)
assert resp.chunked is True
resp.supports_chunked_reads = lambda: True
resp.release_conn = mock.Mock()
for _ in resp.stream():
continue
resp.release_conn.assert_called_once_with()
def test_get_case_insensitive_headers(self):
headers = {'host': 'example.com'}
r = HTTPResponse(headers=headers)
assert r.headers.get('host') == 'example.com'
assert r.headers.get('Host') == 'example.com'
def test_retries(self):
fp = BytesIO(b'')
resp = HTTPResponse(fp)
assert resp.retries is None
retry = Retry()
resp = HTTPResponse(fp, retries=retry)
assert resp.retries == retry
def test_geturl(self):
fp = BytesIO(b'')
request_url = 'https://example.com'
resp = HTTPResponse(fp, request_url=request_url)
assert resp.geturl() == request_url
def test_geturl_retries(self):
fp = BytesIO(b'')
resp = HTTPResponse(fp, request_url='http://example.com')
request_histories = [
RequestHistory(method='GET', url='http://example.com', error=None,
status=301, redirect_location='https://example.com/'),
RequestHistory(method='GET', url='https://example.com/', error=None,
status=301, redirect_location='https://www.example.com')]
retry = Retry(history=request_histories)
resp = HTTPResponse(fp, retries=retry)
assert resp.geturl() == 'https://www.example.com'
class MockChunkedEncodingResponse(object):
def __init__(self, content):
"""
content: collection of str, each str is a chunk in response
"""
self.content = content
self.index = 0 # This class iterates over self.content.
self.closed = False
self.cur_chunk = b''
self.chunks_exhausted = False
@staticmethod
def _encode_chunk(chunk):
# In the general case, we can't decode the chunk to unicode
length = '%X\r\n' % len(chunk)
return length.encode() + chunk + b'\r\n'
def _pop_new_chunk(self):
if self.chunks_exhausted:
return b""
try:
chunk = self.content[self.index]
except IndexError:
chunk = b''
self.chunks_exhausted = True
else:
self.index += 1
chunk = self._encode_chunk(chunk)
if not isinstance(chunk, bytes):
chunk = chunk.encode()
return chunk
def pop_current_chunk(self, amt=-1, till_crlf=False):
if amt > 0 and till_crlf:
raise ValueError("Can't specify amt and till_crlf.")
if len(self.cur_chunk) <= 0:
self.cur_chunk = self._pop_new_chunk()
if till_crlf:
try:
i = self.cur_chunk.index(b"\r\n")
except ValueError:
# No CRLF in current chunk -- probably caused by encoder.
self.cur_chunk = b""
return b""
else:
chunk_part = self.cur_chunk[:i+2]
self.cur_chunk = self.cur_chunk[i+2:]
return chunk_part
elif amt <= -1:
chunk_part = self.cur_chunk
self.cur_chunk = b''
return chunk_part
else:
try:
chunk_part = self.cur_chunk[:amt]
except IndexError:
chunk_part = self.cur_chunk
self.cur_chunk = b''
else:
self.cur_chunk = self.cur_chunk[amt:]
return chunk_part
def readline(self):
return self.pop_current_chunk(till_crlf=True)
def read(self, amt=-1):
return self.pop_current_chunk(amt)
def flush(self):
# Python 3 wants this method.
pass
def close(self):
self.closed = True
class MockChunkedInvalidEncoding(MockChunkedEncodingResponse):
def _encode_chunk(self, chunk):
return 'ZZZ\r\n%s\r\n' % chunk.decode()
class MockChunkedEncodingWithoutCRLFOnEnd(MockChunkedEncodingResponse):
def _encode_chunk(self, chunk):
return '%X\r\n%s%s' % (len(chunk), chunk.decode(),
"\r\n" if len(chunk) > 0 else "")
class MockChunkedEncodingWithExtensions(MockChunkedEncodingResponse):
def _encode_chunk(self, chunk):
return '%X;asd=qwe\r\n%s\r\n' % (len(chunk), chunk.decode())
class MockSock(object):
@classmethod
def makefile(cls, *args, **kwargs):
return