442 строки
14 KiB
Python
Executable File
442 строки
14 KiB
Python
Executable File
#!/usr/bin/python
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# Copyright 2012 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Modified by Linus Nielsen Feltzing for inclusion in the libcurl test
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# framework
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#
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try:
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import socketserver
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except:
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import SocketServer as socketserver
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import argparse
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import re
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import select
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import socket
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import time
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import pprint
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import os
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INFO_MESSAGE = '''
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This is a test server to test the libcurl pipelining functionality.
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It is a modified version if Google's HTTP pipelining test server. More
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information can be found here:
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http://dev.chromium.org/developers/design-documents/network-stack/http-pipelining
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Source code can be found here:
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http://code.google.com/p/http-pipelining-test/
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'''
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MAX_REQUEST_SIZE = 1024 # bytes
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MIN_POLL_TIME = 0.01 # seconds. Minimum time to poll, in order to prevent
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# excessive looping because Python refuses to poll for
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# small timeouts.
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SEND_BUFFER_TIME = 0.5 # seconds
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TIMEOUT = 30 # seconds
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class Error(Exception):
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pass
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class RequestTooLargeError(Error):
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pass
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class ServeIndexError(Error):
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pass
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class UnexpectedMethodError(Error):
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pass
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class RequestParser(object):
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"""Parses an input buffer looking for HTTP GET requests."""
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global logfile
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LOOKING_FOR_GET = 1
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READING_HEADERS = 2
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HEADER_RE = re.compile('([^:]+):(.*)\n')
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REQUEST_RE = re.compile('([^ ]+) ([^ ]+) HTTP/(\d+)\.(\d+)\n')
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def __init__(self):
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"""Initializer."""
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self._buffer = ""
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self._pending_headers = {}
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self._pending_request = ""
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self._state = self.LOOKING_FOR_GET
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self._were_all_requests_http_1_1 = True
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self._valid_requests = []
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def ParseAdditionalData(self, data):
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"""Finds HTTP requests in |data|.
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Args:
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data: (String) Newly received input data from the socket.
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Returns:
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(List of Tuples)
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(String) The request path.
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(Map of String to String) The header name and value.
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Raises:
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RequestTooLargeError: If the request exceeds MAX_REQUEST_SIZE.
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UnexpectedMethodError: On a non-GET method.
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Error: On a programming error.
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"""
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logfile = open('log/server.input', 'a')
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logfile.write(data)
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logfile.close()
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self._buffer += data.replace('\r', '')
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should_continue_parsing = True
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while should_continue_parsing:
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if self._state == self.LOOKING_FOR_GET:
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should_continue_parsing = self._DoLookForGet()
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elif self._state == self.READING_HEADERS:
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should_continue_parsing = self._DoReadHeader()
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else:
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raise Error('Unexpected state: ' + self._state)
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if len(self._buffer) > MAX_REQUEST_SIZE:
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raise RequestTooLargeError(
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'Request is at least %d bytes' % len(self._buffer))
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valid_requests = self._valid_requests
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self._valid_requests = []
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return valid_requests
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@property
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def were_all_requests_http_1_1(self):
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return self._were_all_requests_http_1_1
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def _DoLookForGet(self):
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"""Tries to parse an HTTTP request line.
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Returns:
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(Boolean) True if a request was found.
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Raises:
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UnexpectedMethodError: On a non-GET method.
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"""
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m = self.REQUEST_RE.match(self._buffer)
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if not m:
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return False
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method, path, http_major, http_minor = m.groups()
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if method != 'GET':
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raise UnexpectedMethodError('Unexpected method: ' + method)
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if path in ['/', '/index.htm', '/index.html']:
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raise ServeIndexError()
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if http_major != '1' or http_minor != '1':
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self._were_all_requests_http_1_1 = False
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# print method, path
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self._pending_request = path
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self._buffer = self._buffer[m.end():]
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self._state = self.READING_HEADERS
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return True
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def _DoReadHeader(self):
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"""Tries to parse a HTTP header.
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Returns:
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(Boolean) True if it found the end of the request or a HTTP header.
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"""
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if self._buffer.startswith('\n'):
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self._buffer = self._buffer[1:]
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self._state = self.LOOKING_FOR_GET
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self._valid_requests.append((self._pending_request,
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self._pending_headers))
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self._pending_headers = {}
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self._pending_request = ""
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return True
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m = self.HEADER_RE.match(self._buffer)
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if not m:
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return False
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header = m.group(1).lower()
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value = m.group(2).strip().lower()
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if header not in self._pending_headers:
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self._pending_headers[header] = value
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self._buffer = self._buffer[m.end():]
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return True
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class ResponseBuilder(object):
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"""Builds HTTP responses for a list of accumulated requests."""
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def __init__(self):
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"""Initializer."""
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self._max_pipeline_depth = 0
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self._requested_paths = []
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self._processed_end = False
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self._were_all_requests_http_1_1 = True
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def QueueRequests(self, requested_paths, were_all_requests_http_1_1):
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"""Adds requests to the queue of requests.
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Args:
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requested_paths: (List of Strings) Requested paths.
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"""
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self._requested_paths.extend(requested_paths)
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self._were_all_requests_http_1_1 = were_all_requests_http_1_1
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def Chunkify(self, data, chunksize):
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""" Divides a string into chunks
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"""
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return [hex(chunksize)[2:] + "\r\n" + data[i:i+chunksize] + "\r\n" for i in range(0, len(data), chunksize)]
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def BuildResponses(self):
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"""Converts the queue of requests into responses.
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Returns:
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(String) Buffer containing all of the responses.
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"""
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result = ""
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self._max_pipeline_depth = max(self._max_pipeline_depth,
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len(self._requested_paths))
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for path, headers in self._requested_paths:
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if path == '/verifiedserver':
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body = "WE ROOLZ: {}\r\n".format(os.getpid());
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result += self._BuildResponse(
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'200 OK', ['Server: Apache',
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'Content-Length: {}'.format(len(body)),
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'Cache-Control: no-store'], body)
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elif path == '/alphabet.txt':
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body = 'abcdefghijklmnopqrstuvwxyz'
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result += self._BuildResponse(
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'200 OK', ['Server: Apache',
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'Content-Length: 26',
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'Cache-Control: no-store'], body)
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elif path == '/reverse.txt':
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body = 'zyxwvutsrqponmlkjihgfedcba'
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result += self._BuildResponse(
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'200 OK', ['Content-Length: 26', 'Cache-Control: no-store'], body)
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elif path == '/chunked.txt':
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body = ('7\r\nchunked\r\n'
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'8\r\nencoding\r\n'
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'2\r\nis\r\n'
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'3\r\nfun\r\n'
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'0\r\n\r\n')
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result += self._BuildResponse(
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'200 OK', ['Transfer-Encoding: chunked', 'Cache-Control: no-store'],
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body)
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elif path == '/cached.txt':
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body = 'azbycxdwevfugthsirjqkplomn'
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result += self._BuildResponse(
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'200 OK', ['Content-Length: 26', 'Cache-Control: max-age=60'], body)
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elif path == '/connection_close.txt':
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body = 'azbycxdwevfugthsirjqkplomn'
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result += self._BuildResponse(
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'200 OK', ['Content-Length: 26', 'Cache-Control: max-age=60', 'Connection: close'], body)
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self._processed_end = True
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elif path == '/1k.txt':
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body = '0123456789abcdef' * 64
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result += self._BuildResponse(
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'200 OK', ['Server: Apache',
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'Content-Length: 1024',
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'Cache-Control: max-age=60'], body)
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elif path == '/10k.txt':
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body = '0123456789abcdef' * 640
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result += self._BuildResponse(
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'200 OK', ['Server: Apache',
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'Content-Length: 10240',
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'Cache-Control: max-age=60'], body)
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elif path == '/100k.txt':
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body = '0123456789abcdef' * 6400
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result += self._BuildResponse(
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'200 OK',
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['Server: Apache',
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'Content-Length: 102400',
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'Cache-Control: max-age=60'],
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body)
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elif path == '/100k_chunked.txt':
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body = self.Chunkify('0123456789abcdef' * 6400, 20480)
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body.append('0\r\n\r\n')
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body = ''.join(body)
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result += self._BuildResponse(
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'200 OK', ['Transfer-Encoding: chunked', 'Cache-Control: no-store'], body)
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elif path == '/stats.txt':
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results = {
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'max_pipeline_depth': self._max_pipeline_depth,
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'were_all_requests_http_1_1': int(self._were_all_requests_http_1_1),
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}
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body = ','.join(['%s:%s' % (k, v) for k, v in results.items()])
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result += self._BuildResponse(
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'200 OK',
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['Content-Length: %s' % len(body), 'Cache-Control: no-store'], body)
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self._processed_end = True
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else:
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result += self._BuildResponse('404 Not Found', ['Content-Length: 7'], 'Go away')
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if self._processed_end:
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break
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self._requested_paths = []
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return result
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def WriteError(self, status, error):
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"""Returns an HTTP response for the specified error.
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Args:
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status: (String) Response code and descrtion (e.g. "404 Not Found")
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Returns:
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(String) Text of HTTP response.
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"""
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return self._BuildResponse(
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status, ['Connection: close', 'Content-Type: text/plain'], error)
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@property
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def processed_end(self):
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return self._processed_end
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def _BuildResponse(self, status, headers, body):
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"""Builds an HTTP response.
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Args:
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status: (String) Response code and descrtion (e.g. "200 OK")
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headers: (List of Strings) Headers (e.g. "Connection: close")
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body: (String) Response body.
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Returns:
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(String) Text of HTTP response.
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"""
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return ('HTTP/1.1 %s\r\n'
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'%s\r\n'
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'\r\n'
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'%s' % (status, '\r\n'.join(headers), body))
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class PipelineRequestHandler(socketserver.BaseRequestHandler):
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"""Called on an incoming TCP connection."""
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def _GetTimeUntilTimeout(self):
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return self._start_time + TIMEOUT - time.time()
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def _GetTimeUntilNextSend(self):
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if not self._last_queued_time:
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return TIMEOUT
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return self._last_queued_time + SEND_BUFFER_TIME - time.time()
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def handle(self):
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self._request_parser = RequestParser()
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self._response_builder = ResponseBuilder()
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self._last_queued_time = 0
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self._num_queued = 0
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self._num_written = 0
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self._send_buffer = ""
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self._start_time = time.time()
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try:
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while not self._response_builder.processed_end or self._send_buffer:
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time_left = self._GetTimeUntilTimeout()
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time_until_next_send = self._GetTimeUntilNextSend()
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max_poll_time = min(time_left, time_until_next_send) + MIN_POLL_TIME
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rlist, wlist, xlist = [], [], []
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fileno = self.request.fileno()
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if max_poll_time > 0:
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rlist.append(fileno)
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if self._send_buffer:
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wlist.append(fileno)
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rlist, wlist, xlist = select.select(rlist, wlist, xlist, max_poll_time)
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if self._GetTimeUntilTimeout() <= 0:
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return
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if self._GetTimeUntilNextSend() <= 0:
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self._send_buffer += self._response_builder.BuildResponses()
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self._num_written = self._num_queued
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self._last_queued_time = 0
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if fileno in rlist:
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self.request.setblocking(False)
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new_data = self.request.recv(MAX_REQUEST_SIZE)
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self.request.setblocking(True)
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if not new_data:
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return
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new_requests = self._request_parser.ParseAdditionalData(new_data)
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self._response_builder.QueueRequests(
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new_requests, self._request_parser.were_all_requests_http_1_1)
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self._num_queued += len(new_requests)
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self._last_queued_time = time.time()
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elif fileno in wlist:
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num_bytes_sent = self.request.send(self._send_buffer[0:4096])
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self._send_buffer = self._send_buffer[num_bytes_sent:]
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time.sleep(0.05)
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except RequestTooLargeError as e:
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self.request.send(self._response_builder.WriteError(
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'413 Request Entity Too Large', e))
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raise
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except UnexpectedMethodError as e:
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self.request.send(self._response_builder.WriteError(
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'405 Method Not Allowed', e))
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raise
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except ServeIndexError:
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self.request.send(self._response_builder.WriteError(
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'200 OK', INFO_MESSAGE))
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except Exception as e:
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print(e)
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self.request.close()
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class PipelineServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
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pass
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parser = argparse.ArgumentParser()
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parser.add_argument("--port", action="store", default=0,
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type=int, help="port to listen on")
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parser.add_argument("--verbose", action="store", default=0,
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type=int, help="verbose output")
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parser.add_argument("--pidfile", action="store", default=0,
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help="file name for the PID")
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parser.add_argument("--logfile", action="store", default=0,
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help="file name for the log")
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parser.add_argument("--srcdir", action="store", default=0,
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help="test directory")
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parser.add_argument("--id", action="store", default=0,
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help="server ID")
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parser.add_argument("--ipv4", action="store_true", default=0,
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help="IPv4 flag")
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args = parser.parse_args()
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if args.pidfile:
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pid = os.getpid()
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f = open(args.pidfile, 'w')
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f.write('{}'.format(pid))
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f.close()
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server = PipelineServer(('0.0.0.0', args.port), PipelineRequestHandler)
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server.allow_reuse_address = True
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server.serve_forever()
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