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"""
HTTP2 Test Server. Highly experimental work in progress.
"""
import struct
import messages_pb2
import argparse
import logging
import time
from twisted.internet.defer import Deferred, inlineCallbacks
from twisted.internet.protocol import Protocol, Factory
from twisted.internet import endpoints, reactor, error, defer
from h2.connection import H2Connection
from h2.events import RequestReceived, DataReceived, WindowUpdated, RemoteSettingsChanged
from threading import Lock
import http2_base_server
READ_CHUNK_SIZE = 16384
GRPC_HEADER_SIZE = 5
class TestcaseRstStreamAfterHeader(object):
def __init__(self):
self._base_server = http2_base_server.H2ProtocolBaseServer()
self._base_server._handlers['RequestReceived'] = self.on_request_received
def get_base_server(self):
return self._base_server
def on_request_received(self, event):
# send initial headers
self._base_server.on_request_received_default(event)
# send reset stream
self._base_server.send_reset_stream()
class TestcaseRstStreamAfterData(object):
def __init__(self):
self._base_server = http2_base_server.H2ProtocolBaseServer()
self._base_server._handlers['DataReceived'] = self.on_data_received
def get_base_server(self):
return self._base_server
def on_data_received(self, event):
self._base_server.on_data_received_default(event)
sr = self._base_server.parse_received_data(self._base_server._recv_buffer)
assert(sr is not None)
assert(sr.response_size <= 2048) # so it can fit into one flow control window
response_data = self._base_server.default_response_data(sr.response_size)
self._ready_to_send = True
self._base_server.setup_send(response_data)
# send reset stream
self._base_server.send_reset_stream()
class TestcaseGoaway(object):
"""
Process incoming request normally. After sending trailer response,
send GOAWAY with stream id = 1.
assert that the next request is made on a different connection.
"""
def __init__(self, iteration):
self._base_server = http2_base_server.H2ProtocolBaseServer()
self._base_server._handlers['RequestReceived'] = self.on_request_received
self._base_server._handlers['DataReceived'] = self.on_data_received
self._base_server._handlers['WindowUpdated'] = self.on_window_update_default
self._base_server._handlers['SendDone'] = self.on_send_done
self._base_server._handlers['ConnectionLost'] = self.on_connection_lost
self._ready_to_send = False
self._iteration = iteration
def get_base_server(self):
return self._base_server
def on_connection_lost(self, reason):
logging.info('Disconnect received. Count %d'%self._iteration)
# _iteration == 2 => Two different connections have been used.
if self._iteration == 2:
self._base_server.on_connection_lost(reason)
def on_send_done(self):
self._base_server.on_send_done_default()
if self._base_server._stream_id == 1:
logging.info('Sending GOAWAY for stream 1')
self._base_server._conn.close_connection(error_code=0, additional_data=None, last_stream_id=1)
def on_request_received(self, event):
self._ready_to_send = False
self._base_server.on_request_received_default(event)
def on_data_received(self, event):
self._base_server.on_data_received_default(event)
sr = self._base_server.parse_received_data(self._base_server._recv_buffer)
if sr:
time.sleep(1)
logging.info('Creating response size = %s'%sr.response_size)
response_data = self._base_server.default_response_data(sr.response_size)
self._ready_to_send = True
self._base_server.setup_send(response_data)
def on_window_update_default(self, event):
if self._ready_to_send:
self._base_server.default_send()
class TestcasePing(object):
"""
"""
def __init__(self, iteration):
self._base_server = http2_base_server.H2ProtocolBaseServer()
self._base_server._handlers['RequestReceived'] = self.on_request_received
self._base_server._handlers['DataReceived'] = self.on_data_received
self._base_server._handlers['ConnectionLost'] = self.on_connection_lost
def get_base_server(self):
return self._base_server
def on_request_received(self, event):
self._base_server.default_ping()
self._base_server.on_request_received_default(event)
self._base_server.default_ping()
def on_data_received(self, event):
self._base_server.on_data_received_default(event)
sr = self._base_server.parse_received_data(self._base_server._recv_buffer)
logging.info('Creating response size = %s'%sr.response_size)
response_data = self._base_server.default_response_data(sr.response_size)
self._base_server.default_ping()
self._base_server.setup_send(response_data)
self._base_server.default_ping()
def on_connection_lost(self, reason):
logging.info('Disconnect received. Ping Count %d'%self._base_server._outstanding_pings)
assert(self._base_server._outstanding_pings == 0)
self._base_server.on_connection_lost(reason)
class H2Factory(Factory):
def __init__(self, testcase):
logging.info('In H2Factory')
self._num_streams = 0
self._testcase = testcase
def buildProtocol(self, addr):
self._num_streams += 1
if self._testcase == 'rst_stream_after_header':
t = TestcaseRstStreamAfterHeader(self._num_streams)
elif self._testcase == 'rst_stream_after_data':
t = TestcaseRstStreamAfterData(self._num_streams)
elif self._testcase == 'goaway':
t = TestcaseGoaway(self._num_streams)
elif self._testcase == 'ping':
t = TestcasePing(self._num_streams)
else:
assert(0)
return t.get_base_server()
if __name__ == "__main__":
logging.basicConfig(format = "%(levelname) -10s %(asctime)s %(module)s:%(lineno)s | %(message)s", level=logging.INFO)
parser = argparse.ArgumentParser()
parser.add_argument("test")
parser.add_argument("port")
args = parser.parse_args()
if args.test not in ['rst_stream_after_header', 'rst_stream_after_data', 'goaway', 'ping']:
print 'unknown test: ', args.test
endpoint = endpoints.TCP4ServerEndpoint(reactor, int(args.port), backlog=128)
endpoint.listen(H2Factory(args.test))
reactor.run()
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