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mylar/cherrypy/test/test_conn.py

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"""Tests for TCP connection handling, including proper and timely close."""
import socket
import sys
import time
timeout = 1
import cherrypy
from cherrypy._cpcompat import HTTPConnection, HTTPSConnection, NotConnected, BadStatusLine
from cherrypy._cpcompat import ntob, urlopen, unicodestr
from cherrypy.test import webtest
from cherrypy import _cperror
pov = 'pPeErRsSiIsStTeEnNcCeE oOfF vViIsSiIoOnN'
def setup_server():
def raise500():
raise cherrypy.HTTPError(500)
class Root:
def index(self):
return pov
index.exposed = True
page1 = index
page2 = index
page3 = index
def hello(self):
return "Hello, world!"
hello.exposed = True
def timeout(self, t):
return str(cherrypy.server.httpserver.timeout)
timeout.exposed = True
def stream(self, set_cl=False):
if set_cl:
cherrypy.response.headers['Content-Length'] = 10
def content():
for x in range(10):
yield str(x)
return content()
stream.exposed = True
stream._cp_config = {'response.stream': True}
def error(self, code=500):
raise cherrypy.HTTPError(code)
error.exposed = True
def upload(self):
if not cherrypy.request.method == 'POST':
raise AssertionError("'POST' != request.method %r" %
cherrypy.request.method)
return "thanks for '%s'" % cherrypy.request.body.read()
upload.exposed = True
def custom(self, response_code):
cherrypy.response.status = response_code
return "Code = %s" % response_code
custom.exposed = True
def err_before_read(self):
return "ok"
err_before_read.exposed = True
err_before_read._cp_config = {'hooks.on_start_resource': raise500}
def one_megabyte_of_a(self):
return ["a" * 1024] * 1024
one_megabyte_of_a.exposed = True
def custom_cl(self, body, cl):
cherrypy.response.headers['Content-Length'] = cl
if not isinstance(body, list):
body = [body]
newbody = []
for chunk in body:
if isinstance(chunk, unicodestr):
chunk = chunk.encode('ISO-8859-1')
newbody.append(chunk)
return newbody
custom_cl.exposed = True
# Turn off the encoding tool so it doens't collapse
# our response body and reclaculate the Content-Length.
custom_cl._cp_config = {'tools.encode.on': False}
cherrypy.tree.mount(Root())
cherrypy.config.update({
'server.max_request_body_size': 1001,
'server.socket_timeout': timeout,
})
from cherrypy.test import helper
class ConnectionCloseTests(helper.CPWebCase):
setup_server = staticmethod(setup_server)
def test_HTTP11(self):
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
self.persistent = True
# Make the first request and assert there's no "Connection: close".
self.getPage("/")
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertNoHeader("Connection")
# Make another request on the same connection.
self.getPage("/page1")
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertNoHeader("Connection")
# Test client-side close.
self.getPage("/page2", headers=[("Connection", "close")])
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertHeader("Connection", "close")
# Make another request on the same connection, which should error.
self.assertRaises(NotConnected, self.getPage, "/")
def test_Streaming_no_len(self):
self._streaming(set_cl=False)
def test_Streaming_with_len(self):
self._streaming(set_cl=True)
def _streaming(self, set_cl):
if cherrypy.server.protocol_version == "HTTP/1.1":
self.PROTOCOL = "HTTP/1.1"
self.persistent = True
# Make the first request and assert there's no "Connection: close".
self.getPage("/")
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertNoHeader("Connection")
# Make another, streamed request on the same connection.
if set_cl:
# When a Content-Length is provided, the content should stream
# without closing the connection.
self.getPage("/stream?set_cl=Yes")
self.assertHeader("Content-Length")
self.assertNoHeader("Connection", "close")
self.assertNoHeader("Transfer-Encoding")
self.assertStatus('200 OK')
self.assertBody('0123456789')
else:
# When no Content-Length response header is provided,
# streamed output will either close the connection, or use
# chunked encoding, to determine transfer-length.
self.getPage("/stream")
self.assertNoHeader("Content-Length")
self.assertStatus('200 OK')
self.assertBody('0123456789')
chunked_response = False
for k, v in self.headers:
if k.lower() == "transfer-encoding":
if str(v) == "chunked":
chunked_response = True
if chunked_response:
self.assertNoHeader("Connection", "close")
else:
self.assertHeader("Connection", "close")
# Make another request on the same connection, which should error.
self.assertRaises(NotConnected, self.getPage, "/")
# Try HEAD. See http://www.cherrypy.org/ticket/864.
self.getPage("/stream", method='HEAD')
self.assertStatus('200 OK')
self.assertBody('')
self.assertNoHeader("Transfer-Encoding")
else:
self.PROTOCOL = "HTTP/1.0"
self.persistent = True
# Make the first request and assert Keep-Alive.
self.getPage("/", headers=[("Connection", "Keep-Alive")])
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertHeader("Connection", "Keep-Alive")
# Make another, streamed request on the same connection.
if set_cl:
# When a Content-Length is provided, the content should
# stream without closing the connection.
self.getPage("/stream?set_cl=Yes",
headers=[("Connection", "Keep-Alive")])
self.assertHeader("Content-Length")
self.assertHeader("Connection", "Keep-Alive")
self.assertNoHeader("Transfer-Encoding")
self.assertStatus('200 OK')
self.assertBody('0123456789')
else:
# When a Content-Length is not provided,
# the server should close the connection.
self.getPage("/stream", headers=[("Connection", "Keep-Alive")])
self.assertStatus('200 OK')
self.assertBody('0123456789')
self.assertNoHeader("Content-Length")
self.assertNoHeader("Connection", "Keep-Alive")
self.assertNoHeader("Transfer-Encoding")
# Make another request on the same connection, which should error.
self.assertRaises(NotConnected, self.getPage, "/")
def test_HTTP10_KeepAlive(self):
self.PROTOCOL = "HTTP/1.0"
if self.scheme == "https":
self.HTTP_CONN = HTTPSConnection
else:
self.HTTP_CONN = HTTPConnection
# Test a normal HTTP/1.0 request.
self.getPage("/page2")
self.assertStatus('200 OK')
self.assertBody(pov)
# Apache, for example, may emit a Connection header even for HTTP/1.0
## self.assertNoHeader("Connection")
# Test a keep-alive HTTP/1.0 request.
self.persistent = True
self.getPage("/page3", headers=[("Connection", "Keep-Alive")])
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertHeader("Connection", "Keep-Alive")
# Remove the keep-alive header again.
self.getPage("/page3")
self.assertStatus('200 OK')
self.assertBody(pov)
# Apache, for example, may emit a Connection header even for HTTP/1.0
## self.assertNoHeader("Connection")
class PipelineTests(helper.CPWebCase):
setup_server = staticmethod(setup_server)
def test_HTTP11_Timeout(self):
# If we timeout without sending any data,
# the server will close the conn with a 408.
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
# Connect but send nothing.
self.persistent = True
conn = self.HTTP_CONN
conn.auto_open = False
conn.connect()
# Wait for our socket timeout
time.sleep(timeout * 2)
# The request should have returned 408 already.
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.assertEqual(response.status, 408)
conn.close()
# Connect but send half the headers only.
self.persistent = True
conn = self.HTTP_CONN
conn.auto_open = False
conn.connect()
conn.send(ntob('GET /hello HTTP/1.1'))
conn.send(("Host: %s" % self.HOST).encode('ascii'))
# Wait for our socket timeout
time.sleep(timeout * 2)
# The conn should have already sent 408.
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.assertEqual(response.status, 408)
conn.close()
def test_HTTP11_Timeout_after_request(self):
# If we timeout after at least one request has succeeded,
# the server will close the conn without 408.
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
# Make an initial request
self.persistent = True
conn = self.HTTP_CONN
conn.putrequest("GET", "/timeout?t=%s" % timeout, skip_host=True)
conn.putheader("Host", self.HOST)
conn.endheaders()
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.assertEqual(response.status, 200)
self.body = response.read()
self.assertBody(str(timeout))
# Make a second request on the same socket
conn._output(ntob('GET /hello HTTP/1.1'))
conn._output(ntob("Host: %s" % self.HOST, 'ascii'))
conn._send_output()
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.assertEqual(response.status, 200)
self.body = response.read()
self.assertBody("Hello, world!")
# Wait for our socket timeout
time.sleep(timeout * 2)
# Make another request on the same socket, which should error
conn._output(ntob('GET /hello HTTP/1.1'))
conn._output(ntob("Host: %s" % self.HOST, 'ascii'))
conn._send_output()
response = conn.response_class(conn.sock, method="GET")
try:
response.begin()
except:
if not isinstance(sys.exc_info()[1],
(socket.error, BadStatusLine)):
self.fail("Writing to timed out socket didn't fail"
" as it should have: %s" % sys.exc_info()[1])
else:
if response.status != 408:
self.fail("Writing to timed out socket didn't fail"
" as it should have: %s" %
response.read())
conn.close()
# Make another request on a new socket, which should work
self.persistent = True
conn = self.HTTP_CONN
conn.putrequest("GET", "/", skip_host=True)
conn.putheader("Host", self.HOST)
conn.endheaders()
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.assertEqual(response.status, 200)
self.body = response.read()
self.assertBody(pov)
# Make another request on the same socket,
# but timeout on the headers
conn.send(ntob('GET /hello HTTP/1.1'))
# Wait for our socket timeout
time.sleep(timeout * 2)
response = conn.response_class(conn.sock, method="GET")
try:
response.begin()
except:
if not isinstance(sys.exc_info()[1],
(socket.error, BadStatusLine)):
self.fail("Writing to timed out socket didn't fail"
" as it should have: %s" % sys.exc_info()[1])
else:
self.fail("Writing to timed out socket didn't fail"
" as it should have: %s" %
response.read())
conn.close()
# Retry the request on a new connection, which should work
self.persistent = True
conn = self.HTTP_CONN
conn.putrequest("GET", "/", skip_host=True)
conn.putheader("Host", self.HOST)
conn.endheaders()
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.assertEqual(response.status, 200)
self.body = response.read()
self.assertBody(pov)
conn.close()
def test_HTTP11_pipelining(self):
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
# Test pipelining. httplib doesn't support this directly.
self.persistent = True
conn = self.HTTP_CONN
# Put request 1
conn.putrequest("GET", "/hello", skip_host=True)
conn.putheader("Host", self.HOST)
conn.endheaders()
for trial in range(5):
# Put next request
conn._output(ntob('GET /hello HTTP/1.1'))
conn._output(ntob("Host: %s" % self.HOST, 'ascii'))
conn._send_output()
# Retrieve previous response
response = conn.response_class(conn.sock, method="GET")
response.begin()
body = response.read(13)
self.assertEqual(response.status, 200)
self.assertEqual(body, ntob("Hello, world!"))
# Retrieve final response
response = conn.response_class(conn.sock, method="GET")
response.begin()
body = response.read()
self.assertEqual(response.status, 200)
self.assertEqual(body, ntob("Hello, world!"))
conn.close()
def test_100_Continue(self):
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
self.persistent = True
conn = self.HTTP_CONN
# Try a page without an Expect request header first.
# Note that httplib's response.begin automatically ignores
# 100 Continue responses, so we must manually check for it.
conn.putrequest("POST", "/upload", skip_host=True)
conn.putheader("Host", self.HOST)
conn.putheader("Content-Type", "text/plain")
conn.putheader("Content-Length", "4")
conn.endheaders()
conn.send(ntob("d'oh"))
response = conn.response_class(conn.sock, method="POST")
version, status, reason = response._read_status()
self.assertNotEqual(status, 100)
conn.close()
# Now try a page with an Expect header...
conn.connect()
conn.putrequest("POST", "/upload", skip_host=True)
conn.putheader("Host", self.HOST)
conn.putheader("Content-Type", "text/plain")
conn.putheader("Content-Length", "17")
conn.putheader("Expect", "100-continue")
conn.endheaders()
response = conn.response_class(conn.sock, method="POST")
# ...assert and then skip the 100 response
version, status, reason = response._read_status()
self.assertEqual(status, 100)
while True:
line = response.fp.readline().strip()
if line:
self.fail("100 Continue should not output any headers. Got %r" % line)
else:
break
# ...send the body
body = ntob("I am a small file")
conn.send(body)
# ...get the final response
response.begin()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(200)
self.assertBody("thanks for '%s'" % body)
conn.close()
class ConnectionTests(helper.CPWebCase):
setup_server = staticmethod(setup_server)
def test_readall_or_close(self):
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
if self.scheme == "https":
self.HTTP_CONN = HTTPSConnection
else:
self.HTTP_CONN = HTTPConnection
# Test a max of 0 (the default) and then reset to what it was above.
old_max = cherrypy.server.max_request_body_size
for new_max in (0, old_max):
cherrypy.server.max_request_body_size = new_max
self.persistent = True
conn = self.HTTP_CONN
# Get a POST page with an error
conn.putrequest("POST", "/err_before_read", skip_host=True)
conn.putheader("Host", self.HOST)
conn.putheader("Content-Type", "text/plain")
conn.putheader("Content-Length", "1000")
conn.putheader("Expect", "100-continue")
conn.endheaders()
response = conn.response_class(conn.sock, method="POST")
# ...assert and then skip the 100 response
version, status, reason = response._read_status()
self.assertEqual(status, 100)
while True:
skip = response.fp.readline().strip()
if not skip:
break
# ...send the body
conn.send(ntob("x" * 1000))
# ...get the final response
response.begin()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(500)
# Now try a working page with an Expect header...
conn._output(ntob('POST /upload HTTP/1.1'))
conn._output(ntob("Host: %s" % self.HOST, 'ascii'))
conn._output(ntob("Content-Type: text/plain"))
conn._output(ntob("Content-Length: 17"))
conn._output(ntob("Expect: 100-continue"))
conn._send_output()
response = conn.response_class(conn.sock, method="POST")
# ...assert and then skip the 100 response
version, status, reason = response._read_status()
self.assertEqual(status, 100)
while True:
skip = response.fp.readline().strip()
if not skip:
break
# ...send the body
body = ntob("I am a small file")
conn.send(body)
# ...get the final response
response.begin()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(200)
self.assertBody("thanks for '%s'" % body)
conn.close()
def test_No_Message_Body(self):
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
self.PROTOCOL = "HTTP/1.1"
# Set our HTTP_CONN to an instance so it persists between requests.
self.persistent = True
# Make the first request and assert there's no "Connection: close".
self.getPage("/")
self.assertStatus('200 OK')
self.assertBody(pov)
self.assertNoHeader("Connection")
# Make a 204 request on the same connection.
self.getPage("/custom/204")
self.assertStatus(204)
self.assertNoHeader("Content-Length")
self.assertBody("")
self.assertNoHeader("Connection")
# Make a 304 request on the same connection.
self.getPage("/custom/304")
self.assertStatus(304)
self.assertNoHeader("Content-Length")
self.assertBody("")
self.assertNoHeader("Connection")
def test_Chunked_Encoding(self):
if cherrypy.server.protocol_version != "HTTP/1.1":
return self.skip()
if (hasattr(self, 'harness') and
"modpython" in self.harness.__class__.__name__.lower()):
# mod_python forbids chunked encoding
return self.skip()
self.PROTOCOL = "HTTP/1.1"
# Set our HTTP_CONN to an instance so it persists between requests.
self.persistent = True
conn = self.HTTP_CONN
# Try a normal chunked request (with extensions)
body = ntob("8;key=value\r\nxx\r\nxxxx\r\n5\r\nyyyyy\r\n0\r\n"
"Content-Type: application/json\r\n"
"\r\n")
conn.putrequest("POST", "/upload", skip_host=True)
conn.putheader("Host", self.HOST)
conn.putheader("Transfer-Encoding", "chunked")
conn.putheader("Trailer", "Content-Type")
# Note that this is somewhat malformed:
# we shouldn't be sending Content-Length.
# RFC 2616 says the server should ignore it.
conn.putheader("Content-Length", "3")
conn.endheaders()
conn.send(body)
response = conn.getresponse()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus('200 OK')
self.assertBody("thanks for '%s'" % ntob('xx\r\nxxxxyyyyy'))
# Try a chunked request that exceeds server.max_request_body_size.
# Note that the delimiters and trailer are included.
body = ntob("3e3\r\n" + ("x" * 995) + "\r\n0\r\n\r\n")
conn.putrequest("POST", "/upload", skip_host=True)
conn.putheader("Host", self.HOST)
conn.putheader("Transfer-Encoding", "chunked")
conn.putheader("Content-Type", "text/plain")
# Chunked requests don't need a content-length
## conn.putheader("Content-Length", len(body))
conn.endheaders()
conn.send(body)
response = conn.getresponse()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(413)
conn.close()
def test_Content_Length_in(self):
# Try a non-chunked request where Content-Length exceeds
# server.max_request_body_size. Assert error before body send.
self.persistent = True
conn = self.HTTP_CONN
conn.putrequest("POST", "/upload", skip_host=True)
conn.putheader("Host", self.HOST)
conn.putheader("Content-Type", "text/plain")
conn.putheader("Content-Length", "9999")
conn.endheaders()
response = conn.getresponse()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(413)
self.assertBody("The entity sent with the request exceeds "
"the maximum allowed bytes.")
conn.close()
def test_Content_Length_out_preheaders(self):
# Try a non-chunked response where Content-Length is less than
# the actual bytes in the response body.
self.persistent = True
conn = self.HTTP_CONN
conn.putrequest("GET", "/custom_cl?body=I+have+too+many+bytes&cl=5",
skip_host=True)
conn.putheader("Host", self.HOST)
conn.endheaders()
response = conn.getresponse()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(500)
self.assertBody(
"The requested resource returned more bytes than the "
"declared Content-Length.")
conn.close()
def test_Content_Length_out_postheaders(self):
# Try a non-chunked response where Content-Length is less than
# the actual bytes in the response body.
self.persistent = True
conn = self.HTTP_CONN
conn.putrequest("GET", "/custom_cl?body=I+too&body=+have+too+many&cl=5",
skip_host=True)
conn.putheader("Host", self.HOST)
conn.endheaders()
response = conn.getresponse()
self.status, self.headers, self.body = webtest.shb(response)
self.assertStatus(200)
self.assertBody("I too")
conn.close()
def test_598(self):
remote_data_conn = urlopen('%s://%s:%s/one_megabyte_of_a/' %
(self.scheme, self.HOST, self.PORT,))
buf = remote_data_conn.read(512)
time.sleep(timeout * 0.6)
remaining = (1024 * 1024) - 512
while remaining:
data = remote_data_conn.read(remaining)
if not data:
break
else:
buf += data
remaining -= len(data)
self.assertEqual(len(buf), 1024 * 1024)
self.assertEqual(buf, ntob("a" * 1024 * 1024))
self.assertEqual(remaining, 0)
remote_data_conn.close()
class BadRequestTests(helper.CPWebCase):
setup_server = staticmethod(setup_server)
def test_No_CRLF(self):
self.persistent = True
conn = self.HTTP_CONN
conn.send(ntob('GET /hello HTTP/1.1\n\n'))
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.body = response.read()
self.assertBody("HTTP requires CRLF terminators")
conn.close()
conn.connect()
conn.send(ntob('GET /hello HTTP/1.1\r\n\n'))
response = conn.response_class(conn.sock, method="GET")
response.begin()
self.body = response.read()
self.assertBody("HTTP requires CRLF terminators")
conn.close()
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