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annotate mercurial/keepalive.py @ 2435:ff2bac730b99

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http client: support persistent connections. uses keepalive module from urlgrabber package. tested against "hg serve", cgi server, and through http proxy. used ethereal to verify that only one tcp connection used during entire "hg pull" sequence. if server supports keepalive, this makes latency of "hg pull" much lower.
author Vadim Gelfer <vadim.gelfer@gmail.com>
date Thu, 15 Jun 2006 12:57:59 -0700
parents
children 5eb02f9ed804
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2435
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1 # This library is free software; you can redistribute it and/or
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2 # modify it under the terms of the GNU Lesser General Public
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3 # License as published by the Free Software Foundation; either
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4 # version 2.1 of the License, or (at your option) any later version.
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5 #
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6 # This library is distributed in the hope that it will be useful,
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7 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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9 # Lesser General Public License for more details.
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10 #
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11 # You should have received a copy of the GNU Lesser General Public
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12 # License along with this library; if not, write to the
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13 # Free Software Foundation, Inc.,
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14 # 59 Temple Place, Suite 330,
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15 # Boston, MA 02111-1307 USA
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16
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17 # This file is part of urlgrabber, a high-level cross-protocol url-grabber
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18 # Copyright 2002-2004 Michael D. Stenner, Ryan Tomayko
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19
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20 """An HTTP handler for urllib2 that supports HTTP 1.1 and keepalive.
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21
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22 >>> import urllib2
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23 >>> from keepalive import HTTPHandler
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24 >>> keepalive_handler = HTTPHandler()
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25 >>> opener = urllib2.build_opener(keepalive_handler)
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26 >>> urllib2.install_opener(opener)
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27 >>>
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28 >>> fo = urllib2.urlopen('http://www.python.org')
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29
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30 If a connection to a given host is requested, and all of the existing
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31 connections are still in use, another connection will be opened. If
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32 the handler tries to use an existing connection but it fails in some
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33 way, it will be closed and removed from the pool.
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34
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35 To remove the handler, simply re-run build_opener with no arguments, and
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36 install that opener.
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37
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38 You can explicitly close connections by using the close_connection()
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39 method of the returned file-like object (described below) or you can
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40 use the handler methods:
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41
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42 close_connection(host)
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43 close_all()
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44 open_connections()
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45
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46 NOTE: using the close_connection and close_all methods of the handler
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47 should be done with care when using multiple threads.
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48 * there is nothing that prevents another thread from creating new
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49 connections immediately after connections are closed
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50 * no checks are done to prevent in-use connections from being closed
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51
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52 >>> keepalive_handler.close_all()
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53
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54 EXTRA ATTRIBUTES AND METHODS
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55
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56 Upon a status of 200, the object returned has a few additional
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57 attributes and methods, which should not be used if you want to
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58 remain consistent with the normal urllib2-returned objects:
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59
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60 close_connection() - close the connection to the host
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61 readlines() - you know, readlines()
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62 status - the return status (ie 404)
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63 reason - english translation of status (ie 'File not found')
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64
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65 If you want the best of both worlds, use this inside an
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66 AttributeError-catching try:
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67
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68 >>> try: status = fo.status
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69 >>> except AttributeError: status = None
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70
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71 Unfortunately, these are ONLY there if status == 200, so it's not
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72 easy to distinguish between non-200 responses. The reason is that
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73 urllib2 tries to do clever things with error codes 301, 302, 401,
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74 and 407, and it wraps the object upon return.
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75
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76 For python versions earlier than 2.4, you can avoid this fancy error
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77 handling by setting the module-level global HANDLE_ERRORS to zero.
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78 You see, prior to 2.4, it's the HTTP Handler's job to determine what
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79 to handle specially, and what to just pass up. HANDLE_ERRORS == 0
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80 means "pass everything up". In python 2.4, however, this job no
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81 longer belongs to the HTTP Handler and is now done by a NEW handler,
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82 HTTPErrorProcessor. Here's the bottom line:
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83
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84 python version < 2.4
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85 HANDLE_ERRORS == 1 (default) pass up 200, treat the rest as
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86 errors
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87 HANDLE_ERRORS == 0 pass everything up, error processing is
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88 left to the calling code
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89 python version >= 2.4
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90 HANDLE_ERRORS == 1 pass up 200, treat the rest as errors
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91 HANDLE_ERRORS == 0 (default) pass everything up, let the
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92 other handlers (specifically,
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93 HTTPErrorProcessor) decide what to do
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94
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95 In practice, setting the variable either way makes little difference
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96 in python 2.4, so for the most consistent behavior across versions,
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97 you probably just want to use the defaults, which will give you
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98 exceptions on errors.
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99
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100 """
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101
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102 # $Id: keepalive.py,v 1.13 2005/10/22 21:57:28 mstenner Exp $
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103
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104 import urllib2
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105 import httplib
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106 import socket
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107 import thread
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108
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109 DEBUG = None
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110
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111 import sys
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112 if sys.version_info < (2, 4): HANDLE_ERRORS = 1
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113 else: HANDLE_ERRORS = 0
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114
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115 class ConnectionManager:
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116 """
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117 The connection manager must be able to:
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118 * keep track of all existing
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119 """
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120 def __init__(self):
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121 self._lock = thread.allocate_lock()
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122 self._hostmap = {} # map hosts to a list of connections
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123 self._connmap = {} # map connections to host
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124 self._readymap = {} # map connection to ready state
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125
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126 def add(self, host, connection, ready):
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127 self._lock.acquire()
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128 try:
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129 if not self._hostmap.has_key(host): self._hostmap[host] = []
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130 self._hostmap[host].append(connection)
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131 self._connmap[connection] = host
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132 self._readymap[connection] = ready
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133 finally:
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134 self._lock.release()
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135
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136 def remove(self, connection):
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137 self._lock.acquire()
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138 try:
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diff changeset
139 try:
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
140 host = self._connmap[connection]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
141 except KeyError:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
142 pass
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
143 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
144 del self._connmap[connection]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
145 del self._readymap[connection]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
146 self._hostmap[host].remove(connection)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
147 if not self._hostmap[host]: del self._hostmap[host]
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
148 finally:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
149 self._lock.release()
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parents:
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150
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
151 def set_ready(self, connection, ready):
ff2bac730b99 http client: support persistent connections.
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diff changeset
152 try: self._readymap[connection] = ready
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
153 except KeyError: pass
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parents:
diff changeset
154
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
155 def get_ready_conn(self, host):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
156 conn = None
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
157 self._lock.acquire()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
158 try:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
159 if self._hostmap.has_key(host):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
160 for c in self._hostmap[host]:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
161 if self._readymap[c]:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
162 self._readymap[c] = 0
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
163 conn = c
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
164 break
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
165 finally:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
166 self._lock.release()
ff2bac730b99 http client: support persistent connections.
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parents:
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167 return conn
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
168
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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169 def get_all(self, host=None):
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diff changeset
170 if host:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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171 return list(self._hostmap.get(host, []))
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
172 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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173 return dict(self._hostmap)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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174
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
175 class HTTPHandler(urllib2.HTTPHandler):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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176 def __init__(self):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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177 self._cm = ConnectionManager()
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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178
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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179 #### Connection Management
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Vadim Gelfer <vadim.gelfer@gmail.com>
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180 def open_connections(self):
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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181 """return a list of connected hosts and the number of connections
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
182 to each. [('foo.com:80', 2), ('bar.org', 1)]"""
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
183 return [(host, len(li)) for (host, li) in self._cm.get_all().items()]
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
184
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
185 def close_connection(self, host):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
186 """close connection(s) to <host>
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
187 host is the host:port spec, as in 'www.cnn.com:8080' as passed in.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
188 no error occurs if there is no connection to that host."""
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
189 for h in self._cm.get_all(host):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
190 self._cm.remove(h)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
191 h.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
192
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
193 def close_all(self):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
194 """close all open connections"""
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
195 for host, conns in self._cm.get_all().items():
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
196 for h in conns:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
197 self._cm.remove(h)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
198 h.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
199
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
200 def _request_closed(self, request, host, connection):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
201 """tells us that this request is now closed and the the
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
202 connection is ready for another request"""
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
203 self._cm.set_ready(connection, 1)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
204
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
205 def _remove_connection(self, host, connection, close=0):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
206 if close: connection.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
207 self._cm.remove(connection)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
208
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
209 #### Transaction Execution
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
210 def http_open(self, req):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
211 return self.do_open(HTTPConnection, req)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
212
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
213 def do_open(self, http_class, req):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
214 host = req.get_host()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
215 if not host:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
216 raise urllib2.URLError('no host given')
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
217
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
218 try:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
219 h = self._cm.get_ready_conn(host)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
220 while h:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
221 r = self._reuse_connection(h, req, host)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
222
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
223 # if this response is non-None, then it worked and we're
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
224 # done. Break out, skipping the else block.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
225 if r: break
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
226
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
227 # connection is bad - possibly closed by server
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
228 # discard it and ask for the next free connection
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
229 h.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
230 self._cm.remove(h)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
231 h = self._cm.get_ready_conn(host)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
232 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
233 # no (working) free connections were found. Create a new one.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
234 h = http_class(host)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
235 if DEBUG: DEBUG.info("creating new connection to %s (%d)",
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
236 host, id(h))
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
237 self._cm.add(host, h, 0)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
238 self._start_transaction(h, req)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
239 r = h.getresponse()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
240 except (socket.error, httplib.HTTPException), err:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
241 raise urllib2.URLError(err)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
242
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
243 # if not a persistent connection, don't try to reuse it
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
244 if r.will_close: self._cm.remove(h)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
245
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
246 if DEBUG: DEBUG.info("STATUS: %s, %s", r.status, r.reason)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
247 r._handler = self
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
248 r._host = host
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
249 r._url = req.get_full_url()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
250 r._connection = h
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
251 r.code = r.status
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
252
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
253 if r.status == 200 or not HANDLE_ERRORS:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
254 return r
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
255 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
256 return self.parent.error('http', req, r, r.status, r.reason, r.msg)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
257
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
258
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
259 def _reuse_connection(self, h, req, host):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
260 """start the transaction with a re-used connection
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
261 return a response object (r) upon success or None on failure.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
262 This DOES not close or remove bad connections in cases where
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
263 it returns. However, if an unexpected exception occurs, it
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
264 will close and remove the connection before re-raising.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
265 """
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
266 try:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
267 self._start_transaction(h, req)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
268 r = h.getresponse()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
269 # note: just because we got something back doesn't mean it
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
270 # worked. We'll check the version below, too.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
271 except (socket.error, httplib.HTTPException):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
272 r = None
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
273 except:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
274 # adding this block just in case we've missed
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
275 # something we will still raise the exception, but
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
276 # lets try and close the connection and remove it
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
277 # first. We previously got into a nasty loop
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
278 # where an exception was uncaught, and so the
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
279 # connection stayed open. On the next try, the
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
280 # same exception was raised, etc. The tradeoff is
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
281 # that it's now possible this call will raise
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
282 # a DIFFERENT exception
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parents:
diff changeset
283 if DEBUG: DEBUG.error("unexpected exception - closing " + \
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
284 "connection to %s (%d)", host, id(h))
ff2bac730b99 http client: support persistent connections.
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285 self._cm.remove(h)
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286 h.close()
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287 raise
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288
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289 if r is None or r.version == 9:
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290 # httplib falls back to assuming HTTP 0.9 if it gets a
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parents:
diff changeset
291 # bad header back. This is most likely to happen if
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parents:
diff changeset
292 # the socket has been closed by the server since we
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parents:
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293 # last used the connection.
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294 if DEBUG: DEBUG.info("failed to re-use connection to %s (%d)",
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diff changeset
295 host, id(h))
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296 r = None
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diff changeset
297 else:
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diff changeset
298 if DEBUG: DEBUG.info("re-using connection to %s (%d)", host, id(h))
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299
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300 return r
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301
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302 def _start_transaction(self, h, req):
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303 try:
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304 if req.has_data():
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305 data = req.get_data()
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306 h.putrequest('POST', req.get_selector())
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diff changeset
307 if not req.headers.has_key('Content-type'):
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308 h.putheader('Content-type',
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309 'application/x-www-form-urlencoded')
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Vadim Gelfer <vadim.gelfer@gmail.com>
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diff changeset
310 if not req.headers.has_key('Content-length'):
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diff changeset
311 h.putheader('Content-length', '%d' % len(data))
ff2bac730b99 http client: support persistent connections.
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diff changeset
312 else:
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313 h.putrequest('GET', req.get_selector())
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314 except (socket.error, httplib.HTTPException), err:
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315 raise urllib2.URLError(err)
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316
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317 for args in self.parent.addheaders:
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318 h.putheader(*args)
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parents:
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319 for k, v in req.headers.items():
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parents:
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320 h.putheader(k, v)
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diff changeset
321 h.endheaders()
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
322 if req.has_data():
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Vadim Gelfer <vadim.gelfer@gmail.com>
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diff changeset
323 h.send(data)
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324
ff2bac730b99 http client: support persistent connections.
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325 class HTTPResponse(httplib.HTTPResponse):
ff2bac730b99 http client: support persistent connections.
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326 # we need to subclass HTTPResponse in order to
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
327 # 1) add readline() and readlines() methods
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
328 # 2) add close_connection() methods
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
329 # 3) add info() and geturl() methods
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
330
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
331 # in order to add readline(), read must be modified to deal with a
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
332 # buffer. example: readline must read a buffer and then spit back
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
333 # one line at a time. The only real alternative is to read one
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
334 # BYTE at a time (ick). Once something has been read, it can't be
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
335 # put back (ok, maybe it can, but that's even uglier than this),
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
336 # so if you THEN do a normal read, you must first take stuff from
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
337 # the buffer.
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
338
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
339 # the read method wraps the original to accomodate buffering,
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
340 # although read() never adds to the buffer.
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
341 # Both readline and readlines have been stolen with almost no
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
342 # modification from socket.py
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
343
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
344
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
345 def __init__(self, sock, debuglevel=0, strict=0, method=None):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
346 if method: # the httplib in python 2.3 uses the method arg
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
347 httplib.HTTPResponse.__init__(self, sock, debuglevel, method)
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
348 else: # 2.2 doesn't
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diff changeset
349 httplib.HTTPResponse.__init__(self, sock, debuglevel)
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
350 self.fileno = sock.fileno
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diff changeset
351 self.code = None
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diff changeset
352 self._rbuf = ''
ff2bac730b99 http client: support persistent connections.
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diff changeset
353 self._rbufsize = 8096
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
354 self._handler = None # inserted by the handler later
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
355 self._host = None # (same)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
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diff changeset
356 self._url = None # (same)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
357 self._connection = None # (same)
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
358
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
359 _raw_read = httplib.HTTPResponse.read
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
360
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
361 def close(self):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
362 if self.fp:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
363 self.fp.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
364 self.fp = None
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
365 if self._handler:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
366 self._handler._request_closed(self, self._host,
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
367 self._connection)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
368
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
369 def close_connection(self):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
370 self._handler._remove_connection(self._host, self._connection, close=1)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
371 self.close()
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
372
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
373 def info(self):
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
374 return self.msg
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
375
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
376 def geturl(self):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
377 return self._url
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
378
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
379 def read(self, amt=None):
ff2bac730b99 http client: support persistent connections.
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parents:
diff changeset
380 # the _rbuf test is only in this first if for speed. It's not
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
381 # logically necessary
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
382 if self._rbuf and not amt is None:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
383 L = len(self._rbuf)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
384 if amt > L:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
385 amt -= L
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
386 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
387 s = self._rbuf[:amt]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
388 self._rbuf = self._rbuf[amt:]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
389 return s
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
390
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
391 s = self._rbuf + self._raw_read(amt)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
392 self._rbuf = ''
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
393 return s
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
394
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
395 def readline(self, limit=-1):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
396 data = ""
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
397 i = self._rbuf.find('\n')
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
398 while i < 0 and not (0 < limit <= len(self._rbuf)):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
399 new = self._raw_read(self._rbufsize)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
400 if not new: break
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
401 i = new.find('\n')
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
402 if i >= 0: i = i + len(self._rbuf)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
403 self._rbuf = self._rbuf + new
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
404 if i < 0: i = len(self._rbuf)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
405 else: i = i+1
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
406 if 0 <= limit < len(self._rbuf): i = limit
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
407 data, self._rbuf = self._rbuf[:i], self._rbuf[i:]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
408 return data
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
409
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
410 def readlines(self, sizehint = 0):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
411 total = 0
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
412 list = []
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
413 while 1:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
414 line = self.readline()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
415 if not line: break
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
416 list.append(line)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
417 total += len(line)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
418 if sizehint and total >= sizehint:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
419 break
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
420 return list
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
421
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
422
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
423 class HTTPConnection(httplib.HTTPConnection):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
424 # use the modified response class
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
425 response_class = HTTPResponse
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
426
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
427 #########################################################################
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
428 ##### TEST FUNCTIONS
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
429 #########################################################################
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
430
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
431 def error_handler(url):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
432 global HANDLE_ERRORS
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
433 orig = HANDLE_ERRORS
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
434 keepalive_handler = HTTPHandler()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
435 opener = urllib2.build_opener(keepalive_handler)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
436 urllib2.install_opener(opener)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
437 pos = {0: 'off', 1: 'on'}
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
438 for i in (0, 1):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
439 print " fancy error handling %s (HANDLE_ERRORS = %i)" % (pos[i], i)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
440 HANDLE_ERRORS = i
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
441 try:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
442 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
443 foo = fo.read()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
444 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
445 try: status, reason = fo.status, fo.reason
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
446 except AttributeError: status, reason = None, None
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
447 except IOError, e:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
448 print " EXCEPTION: %s" % e
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
449 raise
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
450 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
451 print " status = %s, reason = %s" % (status, reason)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
452 HANDLE_ERRORS = orig
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
453 hosts = keepalive_handler.open_connections()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
454 print "open connections:", hosts
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
455 keepalive_handler.close_all()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
456
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
457 def continuity(url):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
458 import md5
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
459 format = '%25s: %s'
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
460
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
461 # first fetch the file with the normal http handler
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
462 opener = urllib2.build_opener()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
463 urllib2.install_opener(opener)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
464 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
465 foo = fo.read()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
466 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
467 m = md5.new(foo)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
468 print format % ('normal urllib', m.hexdigest())
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
469
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
470 # now install the keepalive handler and try again
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
471 opener = urllib2.build_opener(HTTPHandler())
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
472 urllib2.install_opener(opener)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
473
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
474 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
475 foo = fo.read()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
476 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
477 m = md5.new(foo)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
478 print format % ('keepalive read', m.hexdigest())
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
479
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
480 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
481 foo = ''
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
482 while 1:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
483 f = fo.readline()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
484 if f: foo = foo + f
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
485 else: break
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
486 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
487 m = md5.new(foo)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
488 print format % ('keepalive readline', m.hexdigest())
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
489
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
490 def comp(N, url):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
491 print ' making %i connections to:\n %s' % (N, url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
492
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
493 sys.stdout.write(' first using the normal urllib handlers')
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
494 # first use normal opener
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
495 opener = urllib2.build_opener()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
496 urllib2.install_opener(opener)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
497 t1 = fetch(N, url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
498 print ' TIME: %.3f s' % t1
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
499
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
500 sys.stdout.write(' now using the keepalive handler ')
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
501 # now install the keepalive handler and try again
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
502 opener = urllib2.build_opener(HTTPHandler())
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
503 urllib2.install_opener(opener)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
504 t2 = fetch(N, url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
505 print ' TIME: %.3f s' % t2
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
506 print ' improvement factor: %.2f' % (t1/t2, )
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
507
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
508 def fetch(N, url, delay=0):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
509 import time
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
510 lens = []
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
511 starttime = time.time()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
512 for i in range(N):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
513 if delay and i > 0: time.sleep(delay)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
514 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
515 foo = fo.read()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
516 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
517 lens.append(len(foo))
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
518 diff = time.time() - starttime
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
519
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
520 j = 0
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
521 for i in lens[1:]:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
522 j = j + 1
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
523 if not i == lens[0]:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
524 print "WARNING: inconsistent length on read %i: %i" % (j, i)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
525
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
526 return diff
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
527
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
528 def test_timeout(url):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
529 global DEBUG
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
530 dbbackup = DEBUG
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
531 class FakeLogger:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
532 def debug(self, msg, *args): print msg % args
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
533 info = warning = error = debug
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
534 DEBUG = FakeLogger()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
535 print " fetching the file to establish a connection"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
536 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
537 data1 = fo.read()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
538 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
539
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
540 i = 20
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
541 print " waiting %i seconds for the server to close the connection" % i
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
542 while i > 0:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
543 sys.stdout.write('\r %2i' % i)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
544 sys.stdout.flush()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
545 time.sleep(1)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
546 i -= 1
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
547 sys.stderr.write('\r')
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
548
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
549 print " fetching the file a second time"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
550 fo = urllib2.urlopen(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
551 data2 = fo.read()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
552 fo.close()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
553
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
554 if data1 == data2:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
555 print ' data are identical'
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
556 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
557 print ' ERROR: DATA DIFFER'
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
558
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
559 DEBUG = dbbackup
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
560
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
561
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
562 def test(url, N=10):
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
563 print "checking error hander (do this on a non-200)"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
564 try: error_handler(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
565 except IOError, e:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
566 print "exiting - exception will prevent further tests"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
567 sys.exit()
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
568 print
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
569 print "performing continuity test (making sure stuff isn't corrupted)"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
570 continuity(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
571 print
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
572 print "performing speed comparison"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
573 comp(N, url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
574 print
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
575 print "performing dropped-connection check"
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
576 test_timeout(url)
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
577
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
578 if __name__ == '__main__':
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
579 import time
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
580 import sys
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
581 try:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
582 N = int(sys.argv[1])
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
583 url = sys.argv[2]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
584 except:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
585 print "%s <integer> <url>" % sys.argv[0]
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
586 else:
ff2bac730b99 http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
587 test(url, N)