author | Lennard de Rijk <ljvderijk@gmail.com> |
Fri, 30 Jan 2009 10:36:23 +0000 | |
changeset 1079 | be1aacb33b0f |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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1 |
""" |
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2 |
FastCGI (or SCGI, or AJP1.3 ...) server that implements the WSGI protocol. |
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3 |
|
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4 |
Uses the flup python package: http://www.saddi.com/software/flup/ |
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5 |
|
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6 |
This is a adaptation of the flup package to add FastCGI server support |
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7 |
to run Django apps from Web servers that support the FastCGI protocol. |
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8 |
This module can be run standalone or from the django-admin / manage.py |
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9 |
scripts using the "runfcgi" directive. |
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10 |
|
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11 |
Run with the extra option "help" for a list of additional options you can |
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12 |
pass to this server. |
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13 |
""" |
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14 |
|
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15 |
import sys, os |
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16 |
|
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17 |
__version__ = "0.1" |
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18 |
__all__ = ["runfastcgi"] |
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19 |
|
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20 |
FASTCGI_HELP = r""" |
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21 |
Run this project as a fastcgi (or some other protocol supported |
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22 |
by flup) application. To do this, the flup package from |
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23 |
http://www.saddi.com/software/flup/ is required. |
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24 |
|
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25 |
runfcgi [options] [fcgi settings] |
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26 |
|
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27 |
Optional Fcgi settings: (setting=value) |
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28 |
protocol=PROTOCOL fcgi, scgi, ajp, ... (default fcgi) |
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29 |
host=HOSTNAME hostname to listen on.. |
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port=PORTNUM port to listen on. |
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socket=FILE UNIX socket to listen on. |
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32 |
method=IMPL prefork or threaded (default prefork) |
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33 |
maxrequests=NUMBER number of requests a child handles before it is |
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34 |
killed and a new child is forked (0 = no limit). |
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35 |
maxspare=NUMBER max number of spare processes / threads |
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minspare=NUMBER min number of spare processes / threads. |
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37 |
maxchildren=NUMBER hard limit number of processes / threads |
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38 |
daemonize=BOOL whether to detach from terminal. |
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39 |
pidfile=FILE write the spawned process-id to this file. |
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40 |
workdir=DIRECTORY change to this directory when daemonizing. |
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41 |
outlog=FILE write stdout to this file. |
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42 |
errlog=FILE write stderr to this file. |
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umask=UMASK umask to use when daemonizing (default 022). |
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|
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45 |
Examples: |
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46 |
Run a "standard" fastcgi process on a file-descriptor |
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47 |
(for webservers which spawn your processes for you) |
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48 |
$ manage.py runfcgi method=threaded |
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49 |
|
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Run a scgi server on a TCP host/port |
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51 |
$ manage.py runfcgi protocol=scgi method=prefork host=127.0.0.1 port=8025 |
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52 |
|
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Run a fastcgi server on a UNIX domain socket (posix platforms only) |
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54 |
$ manage.py runfcgi method=prefork socket=/tmp/fcgi.sock |
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55 |
|
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Run a fastCGI as a daemon and write the spawned PID in a file |
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$ manage.py runfcgi socket=/tmp/fcgi.sock method=prefork \ |
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daemonize=true pidfile=/var/run/django-fcgi.pid |
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59 |
|
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""" |
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61 |
|
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FASTCGI_OPTIONS = { |
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'protocol': 'fcgi', |
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'host': None, |
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65 |
'port': None, |
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66 |
'socket': None, |
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67 |
'method': 'fork', |
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68 |
'daemonize': None, |
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'workdir': '/', |
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'pidfile': None, |
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'maxspare': 5, |
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72 |
'minspare': 2, |
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73 |
'maxchildren': 50, |
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74 |
'maxrequests': 0, |
03e267d67478
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75 |
'outlog': None, |
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'errlog': None, |
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77 |
'umask': None, |
54
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} |
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79 |
|
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80 |
def fastcgi_help(message=None): |
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81 |
print FASTCGI_HELP |
03e267d67478
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82 |
if message: |
03e267d67478
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83 |
print message |
03e267d67478
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84 |
return False |
03e267d67478
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85 |
|
03e267d67478
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86 |
def runfastcgi(argset=[], **kwargs): |
03e267d67478
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87 |
options = FASTCGI_OPTIONS.copy() |
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88 |
options.update(kwargs) |
03e267d67478
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89 |
for x in argset: |
03e267d67478
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90 |
if "=" in x: |
03e267d67478
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91 |
k, v = x.split('=', 1) |
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92 |
else: |
03e267d67478
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93 |
k, v = x, True |
03e267d67478
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94 |
options[k.lower()] = v |
03e267d67478
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95 |
|
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96 |
if "help" in options: |
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97 |
return fastcgi_help() |
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98 |
|
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99 |
try: |
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100 |
import flup |
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101 |
except ImportError, e: |
03e267d67478
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102 |
print >> sys.stderr, "ERROR: %s" % e |
03e267d67478
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103 |
print >> sys.stderr, " Unable to load the flup package. In order to run django" |
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104 |
print >> sys.stderr, " as a FastCGI application, you will need to get flup from" |
03e267d67478
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105 |
print >> sys.stderr, " http://www.saddi.com/software/flup/ If you've already" |
03e267d67478
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106 |
print >> sys.stderr, " installed flup, then make sure you have it in your PYTHONPATH." |
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107 |
return False |
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108 |
|
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109 |
flup_module = 'server.' + options['protocol'] |
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110 |
|
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111 |
if options['method'] in ('prefork', 'fork'): |
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112 |
wsgi_opts = { |
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113 |
'maxSpare': int(options["maxspare"]), |
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114 |
'minSpare': int(options["minspare"]), |
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115 |
'maxChildren': int(options["maxchildren"]), |
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116 |
'maxRequests': int(options["maxrequests"]), |
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117 |
} |
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118 |
flup_module += '_fork' |
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119 |
elif options['method'] in ('thread', 'threaded'): |
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120 |
wsgi_opts = { |
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121 |
'maxSpare': int(options["maxspare"]), |
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122 |
'minSpare': int(options["minspare"]), |
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123 |
'maxThreads': int(options["maxchildren"]), |
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124 |
} |
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125 |
else: |
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126 |
return fastcgi_help("ERROR: Implementation must be one of prefork or thread.") |
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127 |
|
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128 |
wsgi_opts['debug'] = False # Turn off flup tracebacks |
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129 |
|
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130 |
try: |
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131 |
WSGIServer = getattr(__import__('flup.' + flup_module, '', '', flup_module), 'WSGIServer') |
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132 |
except: |
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133 |
print "Can't import flup." + flup_module |
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134 |
return False |
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135 |
|
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136 |
# Prep up and go |
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137 |
from django.core.handlers.wsgi import WSGIHandler |
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138 |
|
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139 |
if options["host"] and options["port"] and not options["socket"]: |
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140 |
wsgi_opts['bindAddress'] = (options["host"], int(options["port"])) |
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141 |
elif options["socket"] and not options["host"] and not options["port"]: |
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142 |
wsgi_opts['bindAddress'] = options["socket"] |
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143 |
elif not options["socket"] and not options["host"] and not options["port"]: |
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144 |
wsgi_opts['bindAddress'] = None |
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145 |
else: |
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146 |
return fastcgi_help("Invalid combination of host, port, socket.") |
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147 |
|
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148 |
if options["daemonize"] is None: |
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149 |
# Default to daemonizing if we're running on a socket/named pipe. |
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150 |
daemonize = (wsgi_opts['bindAddress'] is not None) |
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151 |
else: |
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152 |
if options["daemonize"].lower() in ('true', 'yes', 't'): |
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153 |
daemonize = True |
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154 |
elif options["daemonize"].lower() in ('false', 'no', 'f'): |
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155 |
daemonize = False |
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156 |
else: |
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157 |
return fastcgi_help("ERROR: Invalid option for daemonize parameter.") |
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158 |
|
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159 |
daemon_kwargs = {} |
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160 |
if options['outlog']: |
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161 |
daemon_kwargs['out_log'] = options['outlog'] |
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162 |
if options['errlog']: |
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163 |
daemon_kwargs['err_log'] = options['errlog'] |
323
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164 |
if options['umask']: |
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165 |
daemon_kwargs['umask'] = int(options['umask']) |
54
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166 |
|
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167 |
if daemonize: |
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168 |
from django.utils.daemonize import become_daemon |
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169 |
become_daemon(our_home_dir=options["workdir"], **daemon_kwargs) |
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170 |
|
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171 |
if options["pidfile"]: |
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172 |
fp = open(options["pidfile"], "w") |
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173 |
fp.write("%d\n" % os.getpid()) |
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174 |
fp.close() |
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175 |
|
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176 |
WSGIServer(WSGIHandler(), **wsgi_opts).run() |
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177 |
|
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178 |
if __name__ == '__main__': |
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179 |
runfastcgi(sys.argv[1:]) |