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# Copyright 2010, Google Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import difflib
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import socket
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import http
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class MockSocket(object):
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"""Mock non-blocking socket object.
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This is ONLY capable of mocking a nonblocking socket.
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Attributes:
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early_data: data to always send as soon as end of headers is seen
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data: a list of strings to return on recv(), with the
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assumption that the socket would block between each
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string in the list.
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read_wait_sentinel: data that must be written to the socket before
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beginning the response.
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close_on_empty: If true, close the socket when it runs out of data
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for the client.
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"""
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def __init__(self, af, socktype, proto):
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self.af = af
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self.socktype = socktype
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self.proto = proto
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self.early_data = []
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self.data = []
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self.remote_closed = self.closed = False
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self.close_on_empty = False
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self.sent = ''
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self.read_wait_sentinel = http._END_HEADERS
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def close(self):
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self.closed = True
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def connect(self, sa):
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self.sa = sa
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def setblocking(self, timeout):
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assert timeout == 0
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def recv(self, amt=-1):
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if self.early_data:
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datalist = self.early_data
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elif not self.data:
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return ''
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else:
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datalist = self.data
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if amt == -1:
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return datalist.pop(0)
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data = datalist.pop(0)
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if len(data) > amt:
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datalist.insert(0, data[amt:])
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if not self.data and not self.early_data and self.close_on_empty:
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self.remote_closed = True
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return data[:amt]
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@property
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def ready_for_read(self):
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return ((self.early_data and http._END_HEADERS in self.sent)
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or (self.read_wait_sentinel in self.sent and self.data)
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or self.closed or self.remote_closed)
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def send(self, data):
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# this is a horrible mock, but nothing needs us to raise the
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# correct exception yet
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assert not self.closed, 'attempted to write to a closed socket'
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assert not self.remote_closed, ('attempted to write to a'
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' socket closed by the server')
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if len(data) > 8192:
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data = data[:8192]
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self.sent += data
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return len(data)
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def mockselect(r, w, x, timeout=0):
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"""Simple mock for select()
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"""
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readable = filter(lambda s: s.ready_for_read, r)
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return readable, w[:], []
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class MockSSLSocket(object):
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def __init__(self, sock):
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self._sock = sock
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self._fail_recv = True
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def __getattr__(self, key):
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return getattr(self._sock, key)
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def __setattr__(self, key, value):
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if key not in ('_sock', '_fail_recv'):
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return setattr(self._sock, key, value)
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return object.__setattr__(self, key, value)
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def recv(self, amt=-1):
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try:
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if self._fail_recv:
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raise socket.sslerror(socket.SSL_ERROR_WANT_READ)
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return self._sock.recv(amt=amt)
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finally:
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self._fail_recv = not self._fail_recv
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def mocksslwrap(sock, keyfile=None, certfile=None,
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server_side=False, cert_reqs=http.socketutil.CERT_NONE,
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ssl_version=None, ca_certs=None,
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do_handshake_on_connect=True,
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suppress_ragged_eofs=True):
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return MockSSLSocket(sock)
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def mockgetaddrinfo(host, port, unused, streamtype):
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assert unused == 0
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assert streamtype == socket.SOCK_STREAM
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if host.count('.') != 3:
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host = '127.0.0.42'
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return [(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_TCP, '',
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(host, port))]
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class HttpTestBase(object):
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def setUp(self):
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self.orig_socket = socket.socket
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socket.socket = MockSocket
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self.orig_getaddrinfo = socket.getaddrinfo
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socket.getaddrinfo = mockgetaddrinfo
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self.orig_select = http.select.select
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http.select.select = mockselect
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self.orig_sslwrap = http.socketutil.wrap_socket
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http.socketutil.wrap_socket = mocksslwrap
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def tearDown(self):
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socket.socket = self.orig_socket
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http.select.select = self.orig_select
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http.socketutil.wrap_socket = self.orig_sslwrap
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socket.getaddrinfo = self.orig_getaddrinfo
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def assertStringEqual(self, l, r):
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try:
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self.assertEqual(l, r, ('failed string equality check, '
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'see stdout for details'))
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except:
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add_nl = lambda li: map(lambda x: x + '\n', li)
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print 'failed expectation:'
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print ''.join(difflib.unified_diff(
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add_nl(l.splitlines()), add_nl(r.splitlines()),
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fromfile='expected', tofile='got'))
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raise
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def doPost(self, con, expect_body, body_to_send='This is some POST data'):
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con.request('POST', '/', body=body_to_send,
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expect_continue=True)
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expected_req = ('POST / HTTP/1.1\r\n'
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'Host: 1.2.3.4\r\n'
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'content-length: %d\r\n'
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'Expect: 100-Continue\r\n'
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'accept-encoding: identity\r\n\r\n' %
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len(body_to_send))
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if expect_body:
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expected_req += body_to_send
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return expected_req
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# no-check-code
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