def test_11_handlerException(self):
"""
If the handler throws an exception, L{HTTP.requestReceived} writes a
response with error code 500 (internal server error), and the
exception is logged.
"""
def handler(method, path, headers, body):
raise RuntimeError("I am a buggy handler!")
protocol = HTTP(handler, reactor=task.Clock())
response = []
protocol._writeResponse = lambda r: response.append(r)
protocol.requestReceived("GET", "/", [], "")
# We don't assert anything on the body of the response; if you're
# feeling ambitious you can include the text of the traceback in your
# response:
self.assertEqual(len(response), 1)
self.assertEqual(response[0].code, 500)
# You should log the error using twisted.python.log.err(). This makes
# sure the logged error doesn't cause the test to fail:
excs = self.flushLoggedErrors(RuntimeError)
# And this asserts that you logged it, i.e. that there was one
# RuntimeError logged:
self.assertEqual(len(excs), 1)
def test_02_handler(self):
"""
L{HTTP.__init__} is called with a function as its argument. This
function is called by L{HTTP.requestReceived} with the request
parameters, and its response is passed to L{HTTP._writeResponse}.
In other words, this function determines how the HTTP server processes
and handles requests.
"""
def handler(method, path, headers, body):
self.assertEqual(method, "WOO")
self.assertEqual(path, "/path")
self.assertEqual(headers, {"Key": "value"})
return Response(300, "hello", {"k": "v"})
protocol = HTTP(handler, reactor=task.Clock())
response = []
protocol._writeResponse = lambda r: response.append(r)
# Handler is stored as an attribute of the protocol:
self.assertIdentical(protocol._handler, handler)
# requestReceived calls handler, and then takes the results and passes
# it to _writeResponse:
protocol.requestReceived("WOO", "/path", {"Key": "value"}, "")
self.assertResponsesEqual(response[0],
Response(300, "hello", {"k": "v"}))
def test_01_writeResponse(self):
"""
L{HTTP._writeResponse} writes a HTTP response to the protocol's
transport, then closes the connection. It takes a L{Response}
object that is constructed with three arguments, a numberic response
code and the body of the response, whose length is included as a
content-length header, and additional headers (as a dictionary mapping
keys to values).
"""
self.assertTrue(issubclass(HTTP, Protocol))
protocol = HTTP(None, reactor=task.Clock())
# Connect a fake, in-memory transport to the protocol:
transport = AbortableTransport()
protocol.makeConnection(transport)
protocol._writeResponse(Response(200, "Response body!",
{"content-type": "text/plain"}))
self.assertEqual(transport.value(),
"HTTP/1.1 200 Reason\r\n"
"Content-Length: 14\r\n"
"content-type: text/plain\r\n"
"\r\n"
"Response body!")
# The connection is closed once the response has been written,
# i.e. transport.loseConnection() was called:
self.assertEqual(transport.disconnecting, True)
def test_16_noTimeoutInResponse(self):
"""
Once the full request has been received, the L{HTTP} protocol will not
time out, i.e. will not close the connection even if it sits more than
60 seconds without receiving bytes.
This is because at this point it's the server's responsibility to
reply, which may take a while, and in the interim the server doesn't
expect any bytes from the client so lack of data from client does not
indicate a problem.
"""
transport = AbortableTransport()
fakeReactor = task.Clock()
# Handler that takes forever to return, while still keeping reference
# to the Deferred. If it didn't do the latter, it would get GC'ed,
# which can cause unexpected things like a GeneratorExit exception in
# an inlineCallbacks-decorated handler.
handlerResult = defer.Deferred()
def handler(*args):
return handlerResult
protocol = HTTP(handler, reactor=fakeReactor)
protocol.makeConnection(transport)
protocol.dataReceived('GET / HTTP/1.1\r\n\r\n')
self.assertFalse(transport.aborting)
# Wait 60 seconds:
fakeReactor.advance(60)
self.assertFalse(transport.aborting)
def test_14_handlerReturnsDeferredWithFailure(self):
"""
If the handler returns a Deferred that fires with a failure,
L{HTTP.requestReceived} writes a 500 response code using
L{HTTP._writeResponse} and logs the exception.
"""
# Handler that returns eventual result:
result = defer.Deferred()
def handler(method, path, headers, body):
return result
protocol = HTTP(handler, reactor=task.Clock())
response = []
protocol._writeResponse = lambda r: response.append(r)
protocol.requestReceived("GET", "/", [], "")
# Deferred hasn't fired yet, so no response is sent yet:
self.assertEqual(len(response), 0)
# Now we fire the Deferred with an exception:
result.errback(ZeroDivisionError())
# 500 response code:
self.assertEqual(len(response), 1)
self.assertEqual(response[0].code, 500)
# The error was logged using twisted.python.log.err():
excs = self.flushLoggedErrors(ZeroDivisionError)
self.assertEqual(len(excs), 1)
def test_09_badRequestResponse(self):
"""
L{HTTP.badRequestReceived} writes a response with a 400 code ("Bad
Client Request") using L{HTTP._writeResponse).
"""
protocol = HTTP(None, reactor=task.Clock())
response = []
protocol._writeResponse = lambda r: response.append(r)
protocol.badRequestReceived()
self.assertResponsesEqual(response[0], Response(400, "", {}))
def test_19_requestBodyToHandler(self):
"""
If the HTTP request includes a body, it is passed to the handler
function.
"""
result = []
def handler(method, path, headers, body):
result.append(body)
return Response(200, "hello", {})
protocol = HTTP(handler, reactor=task.Clock())
response = []
protocol._writeResponse = lambda r: response.append(r)
protocol.requestReceived("GET", "/", {}, "the body")
self.assertEqual(result, ["the body"])
def test_15_timeout(self):
"""
If the L{HTTP} protocol takes more than 60 seconds to receive the
request, it will close the connection by calling transport.abortConnection().
"""
transport = AbortableTransport()
fakeReactor = task.Clock()
protocol = HTTP(None, reactor=fakeReactor)
protocol.makeConnection(transport)
protocol.dataReceived('GET')
self.assertFalse(transport.aborting)
# Wait 60 seconds:
fakeReactor.advance(60)
self.assertTrue(transport.aborting)
def test_05_receiveAfterFinalNewline(self):
"""
L{HTTP.requestReceived} is only called after C{dataReceived} gets the
final line with just '\r\n'.
(Network connections may not deliver the full request in a single
dataReceived() call, so the protocol will need to implement a state
machine tracking where it is in the process of parsing the HTTP
request.)
"""
protocol = HTTP(None, reactor=task.Clock())
received = []
protocol.requestReceived = lambda *args: received.append(args)
protocol.makeConnection(AbortableTransport())
protocol.dataReceived("HEAD /?x=y HTTP/")
protocol.dataReceived("1.1\r\n")
self.assertEqual(received, [])
protocol.dataReceived("\r\n")
self.assertEqual(received, [("HEAD", "/?x=y", {}, "")])
def assertBadRequest(request):
protocol = HTTP(None, reactor=task.Clock())
protocol.makeConnection(AbortableTransport())
result = []
protocol.badRequestReceived = lambda: result.append(True)
protocol.dataReceived(request)
self.assertEqual(result, [True])
def test_12_handlerReturnsDeferred(self):
"""
If the handler returns a Deferred that fires with (code, body,
headers), L{HTTP.requestReceived} writes it as a response using
L{HTTP._writeResponse}.
"""
# Handler that returns eventual result:
result = defer.Deferred()
def handler(method, path, headers, body):
return result
protocol = HTTP(handler, reactor=task.Clock())
response = []
protocol._writeResponse = lambda r: response.append(r)
protocol.requestReceived("GET", "/", [], "")
# Deferred hasn't fired yet, so no response is sent yet:
self.assertEqual(len(response), 0)
# Now we fire the Deferred, and response should be written:
result.callback(Response(200, "response", {"key": "value"}))
self.assertResponsesEqual(response[0],
Response(200, "response", {"key": "value"}))
def test_03_receiveRequest(self):
"""
When L{HTTP.dataReceived} receives the bytes for a HTTP request,
L{HTTP.requestRecieved} is called with the method and path.
"""
protocol = HTTP(None, reactor=task.Clock())
received = []
protocol.requestReceived = lambda *args: received.append(args)
# Hook up a fake in-memory transport:
protocol.makeConnection(AbortableTransport())
protocol.dataReceived("GET /foo/bar HTTP/1.1\r\n\r\n")
self.assertEqual(received, [("GET", "/foo/bar", {}, "")])
def test_04_receiveHeaders(self):
"""
When L{HTTP.dataReceived} receives the bytes for a HTTP request,
L{HTTP.requestRecieved} is called with a dictionary of headers.
"""
protocol = HTTP(None, reactor=task.Clock())
received = []
protocol.requestReceived = lambda *args: received.append(args)
protocol.makeConnection(AbortableTransport())
protocol.dataReceived("GET /foo/bar HTTP/1.1\r\n"
"Key: val ue\r\n"
"Another: thing\r\n"
"\r\n")
self.assertEqual(
received,
[("GET", "/foo/bar", {"Key": "val ue", "Another": "thing"}, "")])
def test_18_contentLength(self):
"""
If the HTTP request includes a 'content-length' header, the value
indicates the number of bytes of the request body, which will get
passed as the fourth argument to the requestReceived.
"""
protocol = HTTP(None, reactor=task.Clock())
received = []
protocol.requestReceived = lambda *args: received.append(args)
protocol.makeConnection(AbortableTransport())
protocol.dataReceived("GET /foo/bar HTTP/1.1\r\n")
protocol.dataReceived("Content-Length: 10\r\n")
protocol.dataReceived("\r\n")
protocol.dataReceived("abcde")
self.assertEqual(received, [])
protocol.dataReceived("fghij")
self.assertEqual(
received,
[("GET", "/foo/bar", {"Content-Length": "10"}, "abcdefghij")])
