try:
import socketserver
except:
import SocketServer as socketserver
import argparse
import re
import select
import socket
import time
import pprint
import os
INFO_MESSAGE = '''
This is a test server to test the libcurl pipelining functionality.
It is a modified version if Google's HTTP pipelining test server. More
information can be found here:
https://dev.chromium.org/developers/design-documents/network-stack/http-pipelining
Source code can be found here:
https://code.google.com/archive/p/http-pipelining-test/
'''
MAX_REQUEST_SIZE = 1024 MIN_POLL_TIME = 0.01 SEND_BUFFER_TIME = 0.5 TIMEOUT = 30
class Error(Exception):
pass
class RequestTooLargeError(Error):
pass
class ServeIndexError(Error):
pass
class UnexpectedMethodError(Error):
pass
class RequestParser(object):
"""Parses an input buffer looking for HTTP GET requests."""
global logfile
LOOKING_FOR_GET = 1
READING_HEADERS = 2
HEADER_RE = re.compile('([^:]+):(.*)\n')
REQUEST_RE = re.compile('([^ ]+) ([^ ]+) HTTP/(\d+)\.(\d+)\n')
def __init__(self):
"""Initializer."""
self._buffer = ""
self._pending_headers = {}
self._pending_request = ""
self._state = self.LOOKING_FOR_GET
self._were_all_requests_http_1_1 = True
self._valid_requests = []
def ParseAdditionalData(self, data):
"""Finds HTTP requests in |data|.
Args:
data: (String) Newly received input data from the socket.
Returns:
(List of Tuples)
(String) The request path.
(Map of String to String) The header name and value.
Raises:
RequestTooLargeError: If the request exceeds MAX_REQUEST_SIZE.
UnexpectedMethodError: On a non-GET method.
Error: On a programming error.
"""
logfile = open('log/server.input', 'a')
logfile.write(data)
logfile.close()
self._buffer += data.replace('\r', '')
should_continue_parsing = True
while should_continue_parsing:
if self._state == self.LOOKING_FOR_GET:
should_continue_parsing = self._DoLookForGet()
elif self._state == self.READING_HEADERS:
should_continue_parsing = self._DoReadHeader()
else:
raise Error('Unexpected state: ' + self._state)
if len(self._buffer) > MAX_REQUEST_SIZE:
raise RequestTooLargeError(
'Request is at least %d bytes' % len(self._buffer))
valid_requests = self._valid_requests
self._valid_requests = []
return valid_requests
@property
def were_all_requests_http_1_1(self):
return self._were_all_requests_http_1_1
def _DoLookForGet(self):
"""Tries to parse an HTTTP request line.
Returns:
(Boolean) True if a request was found.
Raises:
UnexpectedMethodError: On a non-GET method.
"""
m = self.REQUEST_RE.match(self._buffer)
if not m:
return False
method, path, http_major, http_minor = m.groups()
if method != 'GET':
raise UnexpectedMethodError('Unexpected method: ' + method)
if path in ['/', '/index.htm', '/index.html']:
raise ServeIndexError()
if http_major != '1' or http_minor != '1':
self._were_all_requests_http_1_1 = False
self._pending_request = path
self._buffer = self._buffer[m.end():]
self._state = self.READING_HEADERS
return True
def _DoReadHeader(self):
"""Tries to parse a HTTP header.
Returns:
(Boolean) True if it found the end of the request or a HTTP header.
"""
if self._buffer.startswith('\n'):
self._buffer = self._buffer[1:]
self._state = self.LOOKING_FOR_GET
self._valid_requests.append((self._pending_request,
self._pending_headers))
self._pending_headers = {}
self._pending_request = ""
return True
m = self.HEADER_RE.match(self._buffer)
if not m:
return False
header = m.group(1).lower()
value = m.group(2).strip().lower()
if header not in self._pending_headers:
self._pending_headers[header] = value
self._buffer = self._buffer[m.end():]
return True
class ResponseBuilder(object):
"""Builds HTTP responses for a list of accumulated requests."""
def __init__(self):
"""Initializer."""
self._max_pipeline_depth = 0
self._requested_paths = []
self._processed_end = False
self._were_all_requests_http_1_1 = True
def QueueRequests(self, requested_paths, were_all_requests_http_1_1):
"""Adds requests to the queue of requests.
Args:
requested_paths: (List of Strings) Requested paths.
"""
self._requested_paths.extend(requested_paths)
self._were_all_requests_http_1_1 = were_all_requests_http_1_1
def Chunkify(self, data, chunksize):
""" Divides a string into chunks
"""
return [hex(chunksize)[2:] + "\r\n" + data[i:i+chunksize] + "\r\n" for i in range(0, len(data), chunksize)]
def BuildResponses(self):
"""Converts the queue of requests into responses.
Returns:
(String) Buffer containing all of the responses.
"""
result = ""
self._max_pipeline_depth = max(self._max_pipeline_depth,
len(self._requested_paths))
for path, headers in self._requested_paths:
if path == '/verifiedserver':
body = "WE ROOLZ: {}\r\n".format(os.getpid());
result += self._BuildResponse(
'200 OK', ['Server: Apache',
'Content-Length: {}'.format(len(body)),
'Cache-Control: no-store'], body)
elif path == '/alphabet.txt':
body = 'abcdefghijklmnopqrstuvwxyz'
result += self._BuildResponse(
'200 OK', ['Server: Apache',
'Content-Length: 26',
'Cache-Control: no-store'], body)
elif path == '/reverse.txt':
body = 'zyxwvutsrqponmlkjihgfedcba'
result += self._BuildResponse(
'200 OK', ['Content-Length: 26', 'Cache-Control: no-store'], body)
elif path == '/chunked.txt':
body = ('7\r\nchunked\r\n'
'8\r\nencoding\r\n'
'2\r\nis\r\n'
'3\r\nfun\r\n'
'0\r\n\r\n')
result += self._BuildResponse(
'200 OK', ['Transfer-Encoding: chunked', 'Cache-Control: no-store'],
body)
elif path == '/cached.txt':
body = 'azbycxdwevfugthsirjqkplomn'
result += self._BuildResponse(
'200 OK', ['Content-Length: 26', 'Cache-Control: max-age=60'], body)
elif path == '/connection_close.txt':
body = 'azbycxdwevfugthsirjqkplomn'
result += self._BuildResponse(
'200 OK', ['Content-Length: 26', 'Cache-Control: max-age=60', 'Connection: close'], body)
self._processed_end = True
elif path == '/1k.txt':
body = '0123456789abcdef' * 64
result += self._BuildResponse(
'200 OK', ['Server: Apache',
'Content-Length: 1024',
'Cache-Control: max-age=60'], body)
elif path == '/10k.txt':
body = '0123456789abcdef' * 640
result += self._BuildResponse(
'200 OK', ['Server: Apache',
'Content-Length: 10240',
'Cache-Control: max-age=60'], body)
elif path == '/100k.txt':
body = '0123456789abcdef' * 6400
result += self._BuildResponse(
'200 OK',
['Server: Apache',
'Content-Length: 102400',
'Cache-Control: max-age=60'],
body)
elif path == '/100k_chunked.txt':
body = self.Chunkify('0123456789abcdef' * 6400, 20480)
body.append('0\r\n\r\n')
body = ''.join(body)
result += self._BuildResponse(
'200 OK', ['Transfer-Encoding: chunked', 'Cache-Control: no-store'], body)
elif path == '/stats.txt':
results = {
'max_pipeline_depth': self._max_pipeline_depth,
'were_all_requests_http_1_1': int(self._were_all_requests_http_1_1),
}
body = ','.join(['%s:%s' % (k, v) for k, v in results.items()])
result += self._BuildResponse(
'200 OK',
['Content-Length: %s' % len(body), 'Cache-Control: no-store'], body)
self._processed_end = True
else:
result += self._BuildResponse('404 Not Found', ['Content-Length: 7'], 'Go away')
if self._processed_end:
break
self._requested_paths = []
return result
def WriteError(self, status, error):
"""Returns an HTTP response for the specified error.
Args:
status: (String) Response code and descrtion (e.g. "404 Not Found")
Returns:
(String) Text of HTTP response.
"""
return self._BuildResponse(
status, ['Connection: close', 'Content-Type: text/plain'], error)
@property
def processed_end(self):
return self._processed_end
def _BuildResponse(self, status, headers, body):
"""Builds an HTTP response.
Args:
status: (String) Response code and descrtion (e.g. "200 OK")
headers: (List of Strings) Headers (e.g. "Connection: close")
body: (String) Response body.
Returns:
(String) Text of HTTP response.
"""
return ('HTTP/1.1 %s\r\n'
'%s\r\n'
'\r\n'
'%s' % (status, '\r\n'.join(headers), body))
class PipelineRequestHandler(socketserver.BaseRequestHandler):
"""Called on an incoming TCP connection."""
def _GetTimeUntilTimeout(self):
return self._start_time + TIMEOUT - time.time()
def _GetTimeUntilNextSend(self):
if not self._last_queued_time:
return TIMEOUT
return self._last_queued_time + SEND_BUFFER_TIME - time.time()
def handle(self):
self._request_parser = RequestParser()
self._response_builder = ResponseBuilder()
self._last_queued_time = 0
self._num_queued = 0
self._num_written = 0
self._send_buffer = ""
self._start_time = time.time()
try:
while not self._response_builder.processed_end or self._send_buffer:
time_left = self._GetTimeUntilTimeout()
time_until_next_send = self._GetTimeUntilNextSend()
max_poll_time = min(time_left, time_until_next_send) + MIN_POLL_TIME
rlist, wlist, xlist = [], [], []
fileno = self.request.fileno()
if max_poll_time > 0:
rlist.append(fileno)
if self._send_buffer:
wlist.append(fileno)
rlist, wlist, xlist = select.select(rlist, wlist, xlist, max_poll_time)
if self._GetTimeUntilTimeout() <= 0:
return
if self._GetTimeUntilNextSend() <= 0:
self._send_buffer += self._response_builder.BuildResponses()
self._num_written = self._num_queued
self._last_queued_time = 0
if fileno in rlist:
self.request.setblocking(False)
new_data = self.request.recv(MAX_REQUEST_SIZE)
self.request.setblocking(True)
if not new_data:
return
new_requests = self._request_parser.ParseAdditionalData(new_data)
self._response_builder.QueueRequests(
new_requests, self._request_parser.were_all_requests_http_1_1)
self._num_queued += len(new_requests)
self._last_queued_time = time.time()
elif fileno in wlist:
num_bytes_sent = self.request.send(self._send_buffer[0:4096])
self._send_buffer = self._send_buffer[num_bytes_sent:]
time.sleep(0.05)
except RequestTooLargeError as e:
self.request.send(self._response_builder.WriteError(
'413 Request Entity Too Large', e))
raise
except UnexpectedMethodError as e:
self.request.send(self._response_builder.WriteError(
'405 Method Not Allowed', e))
raise
except ServeIndexError:
self.request.send(self._response_builder.WriteError(
'200 OK', INFO_MESSAGE))
except Exception as e:
print(e)
self.request.close()
class PipelineServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
pass
parser = argparse.ArgumentParser()
parser.add_argument("--port", action="store", default=0,
type=int, help="port to listen on")
parser.add_argument("--verbose", action="store", default=0,
type=int, help="verbose output")
parser.add_argument("--pidfile", action="store", default=0,
help="file name for the PID")
parser.add_argument("--logfile", action="store", default=0,
help="file name for the log")
parser.add_argument("--srcdir", action="store", default=0,
help="test directory")
parser.add_argument("--id", action="store", default=0,
help="server ID")
parser.add_argument("--ipv4", action="store_true", default=0,
help="IPv4 flag")
args = parser.parse_args()
if args.pidfile:
pid = os.getpid()
f = open(args.pidfile, 'w')
f.write('{}'.format(pid))
f.close()
server = PipelineServer(('0.0.0.0', args.port), PipelineRequestHandler)
server.allow_reuse_address = True
server.serve_forever()