def test_close_midstream(self):
# A mock fp object that wraps a list and allows closing.
class MockFP(object):
self.list = None
def close(self):
self.list = None
def __iter__(self):
return self
def __next__(self):
if not self.list:
raise StopIteration()
return self.list.pop(0)
next = __next__
data = [b'fo', b'o']
fp = MockFP()
fp.list = data
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream()
assert next(stream) == b'fo'
resp.close()
with pytest.raises(StopIteration):
next(stream)
def test_empty_stream(self):
fp = BytesIO(b'')
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(decode_content=False)
with pytest.raises(StopIteration):
next(stream)
def test_streaming(self):
fp = [b'fo', b'o']
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(decode_content=False)
assert next(stream) == b'fo'
assert next(stream) == b'o'
with pytest.raises(StopIteration):
next(stream)
def test_double_streaming(self):
fp = [b'fo', b'o']
resp = HTTPResponse(fp, preload_content=False)
stream = list(resp.stream(decode_content=False))
assert stream == fp
stream = list(resp.stream(decode_content=False))
assert stream == []
def test_deflate_streaming(self):
import zlib
data = zlib.compress(b'foo')
fp = BytesIO(data)
resp = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
stream = resp.stream()
assert next(stream) == b'foo'
with pytest.raises(StopIteration):
next(stream)
def test_deflate2_streaming(self):
import zlib
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()
assert next(stream) == b'foo'
with pytest.raises(StopIteration):
next(stream)
def test_chunked_decoding_gzip(self):
import zlib
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(1) == b'f'
assert r.read(2) == b'oo'
assert r.read() == b''
assert r.read() == b''
def test_chunked_decoding_deflate(self):
import zlib
data = zlib.compress(b'foo')
fp = BytesIO(data)
r = HTTPResponse(fp, headers={'content-encoding': 'deflate'},
preload_content=False)
assert r.read(1) == b'f'
# Buffer in case we need to switch to the raw stream
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):
import zlib
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'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_streaming_tell(self):
fp = [b'fo', b'o']
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream(decode_content=False)
position = 0
position += len(next(stream))
assert 2 == position
assert 2 == resp.tell()
position += len(next(stream))
assert 3 == position
assert 3 == resp.tell()
with pytest.raises(StopIteration):
next(stream)
def test_gzipped_streaming_tell(self):
import zlib
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_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'!tenbytes!'
fp = BytesIO(b)
resp = HTTPResponse(fp, preload_content=False)
br = BufferedReader(resp, 5)
# This is necessary to make sure the "no bytes left" part of `readinto`
# gets tested.
assert len(br.read(5)) == 5
assert len(br.read(5)) == 5
assert len(br.read(5)) == 0
def test_extract(self):
request = urllib.request.Request('http://google.com')
cookiejar = http_cookiejar.CookieJar()
response = HTTPResponse()
cookies = [
"sessionhash=abcabcabcabcab; path=/; HttpOnly",
"lastvisit=1348253375; expires=Sat, 21-Sep-2050 18:49:35 GMT; path=/"
]
for c in cookies:
response.headers.add('set-cookie', c)
cookiejar.extract_cookies(response, request)
assert len(cookiejar) == len(cookies)
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
def __iter__(self):
return self
def __next__(self):
if self.fp is None:
raise StopIteration()
return self.read(1)
next = __next__
bio = BytesIO(b'foo')
fp = MockHTTPRequest()
fp.fp = bio
resp = HTTPResponse(fp, preload_content=False)
stream = resp.stream()
assert next(stream) == b'f'
assert next(stream) == b'o'
assert next(stream) == b'o'
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.
import zlib
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)]
self.consumed = 0
assert b"".join(self.payloads) == payload
def read(self, _):
# Amount is unused.
if len(self.payloads) > 0:
payload = self.payloads.pop(0)
self.consumed += len(payload)
return payload
return b""
def __iter__(self):
return self
def __next__(self):
if not self.payloads:
raise StopIteration()
return self.read(None)
next = __next__
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)
parts = []
stream = resp.stream(1)
for part in stream:
parts.append(part)
assert resp.tell() == fp.consumed
end_of_stream = resp.tell()
with pytest.raises(StopIteration):
next(stream)
# Check that the payload is equal to the uncompressed data
payload = b"".join(parts)
assert uncompressed_data == payload
# Check that the end of the stream is in the correct place
assert len(ZLIB_PAYLOAD) == end_of_stream
def test_closed_streaming(self):
fp = BytesIO(b'foo')
resp = HTTPResponse(fp, preload_content=False)
resp.close()
with pytest.raises(StopIteration):
next(resp.stream())