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annotate roundup/cgi/wsgi_handler.py @ 8519:19152fd94fcf

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bug: move import findargspec out of Permission __init__ method We have a few places where imports are done inside a method/function. For methods that are called once it's not an issue but the Permissions __init__ method is called often and accounts for > 10% of the time in the __init__ function when looking at wsgi-lineprof output. So move it to the module level.
author John Rouillard <rouilj@ieee.org>
date Mon, 02 Feb 2026 23:41:36 -0500
parents b09ef85f0da6
children f80c566f5726
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # WSGI interface for Roundup Issue Tracker
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2 #
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3 # This module is free software, you may redistribute it
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4 # and/or modify under the same terms as Python.
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5 #
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6
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7 import os
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8 from contextlib import contextmanager
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9
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10 import roundup.instance
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11 from roundup.anypy import http_
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12 from roundup.anypy.html import html_escape
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13 from roundup.anypy.strings import s2b
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14 from roundup.cgi import TranslationService
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15 from roundup.cgi.client import BinaryFieldStorage
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16 from roundup.logcontext import gen_trace_id, set_processName, store_trace_reason
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17
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18 BaseHTTPRequestHandler = http_.server.BaseHTTPRequestHandler
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19 DEFAULT_ERROR_MESSAGE = http_.server.DEFAULT_ERROR_MESSAGE
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20
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21 try:
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22 # python2 is missing this definition
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23 http_.server.BaseHTTPRequestHandler.responses[429]
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24 except KeyError:
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25 http_.server.BaseHTTPRequestHandler.responses[429] = (
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26 'Too Many Requests',
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27 'The user has sent too many requests in '
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28 'a given amount of time ("rate limiting")',
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29 )
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30
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31
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32 class Headers(object):
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33 """ Idea more or less stolen from the 'apache.py' in same directory.
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34 Except that wsgi stores http headers in environment.
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35 """
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36 def __init__(self, environ):
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37 self.environ = environ
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38
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39 def mangle_name(self, name):
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40 """ Content-Type is handled specially, it doesn't have a HTTP_
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41 prefix in cgi.
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42 """
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43 n = name.replace('-', '_').upper()
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44 if n == 'CONTENT_TYPE':
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45 return n
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46 return 'HTTP_' + n
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47
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48 def get(self, name, default=None):
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49 return self.environ.get(self.mangle_name(name), default)
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50 getheader = get
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51
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52
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53 class Writer(object):
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54 '''Perform a start_response if need be when we start writing.'''
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55 def __init__(self, request):
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56 self.request = request # weakref.ref(request)
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57
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58 def write(self, data):
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59 f = self.request.get_wfile()
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60 self.write = f
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61 return self.write(data)
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62
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63
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64 class RequestHandler(object):
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65 def __init__(self, environ, start_response):
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66 self.__start_response = start_response
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67 self.__wfile = None
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68 self.headers = Headers(environ)
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69 self.rfile, self.wfile = None, Writer(self)
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70
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71 def start_response(self, headers, response_code):
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72 """Set HTTP response code"""
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73 message, _explain = BaseHTTPRequestHandler.responses[response_code]
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74 self.__wfile = self.__start_response('%d %s' % (response_code,
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75 message), headers)
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76
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77 def get_wfile(self):
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78 if self.__wfile is None:
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79 raise ValueError('start_response() not called')
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80 return self.__wfile
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81
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82
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83 class RequestDispatcher(object):
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84 def __init__(self, home, debug=False, timing=False, lang=None,
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85 feature_flags=None):
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86 if not os.path.isdir(home):
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87 raise ValueError('%r is not a directory' % (home,))
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88 self.home = home
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89 self.debug = debug
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90 self.timing = timing
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91 self.feature_flags = feature_flags or {}
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92 self.tracker = None
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93 if lang:
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94 self.translator = TranslationService.get_translation(
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95 lang,
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96 tracker_home=home)
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97 else:
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98 self.translator = None
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99
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100 if self.use_cached_tracker():
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101 self.tracker = roundup.instance.open(self.home, not self.debug)
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102 else:
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103 self.preload()
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104
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105 def use_cached_tracker(self):
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106 return (
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107 "cache_tracker" not in self.feature_flags or
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108 self.feature_flags["cache_tracker"] is not False)
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109
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110 @set_processName("wsgi_handler")
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111 @gen_trace_id()
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112 @store_trace_reason("wsgi")
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113 def __call__(self, environ, start_response):
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114 """Initialize with `apache.Request` object"""
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115 request = RequestHandler(environ, start_response)
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116
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117 if environ['REQUEST_METHOD'] == 'OPTIONS':
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118 if environ["PATH_INFO"][:5] == "/rest":
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119 # rest does support options
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120 # This I hope will result in self.form=None
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121 environ['CONTENT_LENGTH'] = 0
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122 else:
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123 code = 501
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124 message, explain = BaseHTTPRequestHandler.responses[code]
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125 request.start_response([('Content-Type', 'text/html')],
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126 code)
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127 request.wfile.write(s2b(DEFAULT_ERROR_MESSAGE % locals()))
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128 return []
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129
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130 # need to strip the leading '/'
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131 environ["PATH_INFO"] = environ["PATH_INFO"][1:]
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132 if self.timing:
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133 environ["CGI_SHOW_TIMING"] = self.timing
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134
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135 if environ['REQUEST_METHOD'] in ("OPTIONS", "DELETE"):
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136 # these methods have no data. When we init tracker.Client
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137 # set form to None to get a properly initialized empty
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138 # form.
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139 form = None
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140 else:
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141 form = BinaryFieldStorage(fp=environ['wsgi.input'], environ=environ)
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142
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143 if self.use_cached_tracker():
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144 client = self.tracker.Client(self.tracker, request, environ, form,
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145 self.translator)
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146 try:
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147 client.main()
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148 except roundup.cgi.client.NotFound:
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149 request.start_response([('Content-Type', 'text/html')], 404)
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150 request.wfile.write(s2b('Not found: %s' %
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151 html_escape(client.path)))
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152 else:
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153 with self.get_tracker() as tracker:
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154 client = tracker.Client(tracker, request, environ, form,
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155 self.translator)
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156 try:
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157 client.main()
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158 except roundup.cgi.client.NotFound:
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159 request.start_response([('Content-Type', 'text/html')], 404)
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160 request.wfile.write(s2b('Not found: %s' %
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161 html_escape(client.path)))
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162
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163 # all body data has been written using wfile
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164 return []
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165
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166 def preload(self):
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167 """ Trigger pre-loading of imports and templates """
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168 with self.get_tracker():
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169 pass
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170
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171 @contextmanager
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172 def get_tracker(self):
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173 # get a new instance for each request
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parents: 6061
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174 yield roundup.instance.open(self.home, not self.debug)
Roundup Issue Tracker: http://roundup-tracker.org/