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annotate roundup/cgi/wsgi_handler.py @ 7812:ecc34b7917e2

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chore(refactor): multiple changes/cleanups Simplify 'for x in [list val]; alist.append(x)' to 'alist = list([list val])'. Easier to read as copy of list. Also twice as fast although speed not an issue. Remove unneeded list() wrappers. Replace set(list comprehension) with set comprehension. Also add trailing ,'s to last element in tuples/lists. Add some noqa items for acceptable operations in context. Switch " ... \" ...\" ..." to: ' ... " ... " ...' to remove need to escape internal '"'. Change 'not x in y' to 'x not in y'.
author John Rouillard <rouilj@ieee.org>
date Sat, 16 Mar 2024 21:08:16 -0400
parents 273c8c2b5042
children 0fe2b9f6e19f
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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 import weakref
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9
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10 from contextlib import contextmanager
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11
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12 from roundup.anypy.html import html_escape
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13
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14 import roundup.instance
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15 from roundup.cgi import TranslationService
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16 from roundup.anypy import http_
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17 from roundup.anypy.strings import s2b
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18
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19 from roundup.cgi.client import BinaryFieldStorage
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20
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21 BaseHTTPRequestHandler = http_.server.BaseHTTPRequestHandler
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22 DEFAULT_ERROR_MESSAGE = http_.server.DEFAULT_ERROR_MESSAGE
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23
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24 try:
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25 # python2 is missing this definition
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26 http_.server.BaseHTTPRequestHandler.responses[429]
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27 except KeyError:
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28 http_.server.BaseHTTPRequestHandler.responses[429] = (
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29 'Too Many Requests',
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30 'The user has sent too many requests in '
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31 'a given amount of time ("rate limiting")'
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32 )
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33
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34 class Headers(object):
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35 """ Idea more or less stolen from the 'apache.py' in same directory.
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36 Except that wsgi stores http headers in environment.
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37 """
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38 def __init__(self, environ):
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39 self.environ = environ
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40
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41 def mangle_name(self, name):
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42 """ Content-Type is handled specially, it doesn't have a HTTP_
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43 prefix in cgi.
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44 """
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45 n = name.replace('-', '_').upper()
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46 if n == 'CONTENT_TYPE':
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47 return n
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48 return 'HTTP_' + n
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49
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50 def get(self, name, default=None):
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51 return self.environ.get(self.mangle_name(name), default)
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52 getheader = get
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53
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54
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55 class Writer(object):
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56 '''Perform a start_response if need be when we start writing.'''
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57 def __init__(self, request):
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58 self.request = request # weakref.ref(request)
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59
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60 def write(self, data):
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61 f = self.request.get_wfile()
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62 self.write = f
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63 return self.write(data)
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65
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66 class RequestHandler(object):
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67 def __init__(self, environ, start_response):
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68 self.__start_response = start_response
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69 self.__wfile = None
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70 self.headers = Headers(environ)
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71 self.rfile, self.wfile = None, Writer(self)
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72
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73 def start_response(self, headers, response_code):
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74 """Set HTTP response code"""
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75 message, explain = BaseHTTPRequestHandler.responses[response_code]
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76 self.__wfile = self.__start_response('%d %s' % (response_code,
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77 message), headers)
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78
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79 def get_wfile(self):
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80 if self.__wfile is None:
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81 raise ValueError('start_response() not called')
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82 return self.__wfile
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83
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84
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85 class RequestDispatcher(object):
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86 def __init__(self, home, debug=False, timing=False, lang=None,
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87 feature_flags=None):
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88 assert os.path.isdir(home), '%r is not a directory' % (home,)
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89 self.home = home
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90 self.debug = debug
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91 self.timing = timing
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92 self.feature_flags = feature_flags or {}
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93 self.tracker = None
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94 if lang:
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95 self.translator = TranslationService.get_translation(
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96 lang,
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97 tracker_home=home)
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98 else:
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99 self.translator = None
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100
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101 if "cache_tracker" in self.feature_flags:
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102 self.tracker = roundup.instance.open(self.home, not self.debug)
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103 else:
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104 self.preload()
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105
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106 def __call__(self, environ, start_response):
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107 """Initialize with `apache.Request` object"""
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108 request = RequestHandler(environ, start_response)
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109
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110 if environ['REQUEST_METHOD'] == 'OPTIONS':
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111 if environ["PATH_INFO"][:5] == "/rest":
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112 # rest does support options
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113 # This I hope will result in self.form=None
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114 environ['CONTENT_LENGTH'] = 0
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115 else:
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116 code = 501
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117 message, explain = BaseHTTPRequestHandler.responses[code]
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118 request.start_response([('Content-Type', 'text/html')],
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119 code)
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120 request.wfile.write(s2b(DEFAULT_ERROR_MESSAGE % locals()))
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121 return []
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122
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123 # need to strip the leading '/'
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124 environ["PATH_INFO"] = environ["PATH_INFO"][1:]
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125 if self.timing:
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126 environ["CGI_SHOW_TIMING"] = self.timing
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127
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128 if environ['REQUEST_METHOD'] in ("OPTIONS", "DELETE"):
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129 # these methods have no data. When we init tracker.Client
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130 # set form to None to get a properly initialized empty
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131 # form.
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132 form = None
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133 else:
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134 form = BinaryFieldStorage(fp=environ['wsgi.input'], environ=environ)
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135
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136 if "cache_tracker" in self.feature_flags:
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parents: 6387
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137 client = self.tracker.Client(self.tracker, request, environ, form,
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138 self.translator)
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139 try:
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parents: 6061
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140 client.main()
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141 except roundup.cgi.client.NotFound:
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142 request.start_response([('Content-Type', 'text/html')], 404)
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143 request.wfile.write(s2b('Not found: %s' %
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144 html_escape(client.path)))
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parents: 6387
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145 else:
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146 with self.get_tracker() as tracker:
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parents: 6387
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147 client = tracker.Client(tracker, request, environ, form,
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parents: 6387
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148 self.translator)
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parents: 6387
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149 try:
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150 client.main()
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151 except roundup.cgi.client.NotFound:
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152 request.start_response([('Content-Type', 'text/html')], 404)
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153 request.wfile.write(s2b('Not found: %s' %
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diff changeset
154 html_escape(client.path)))
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Richard Jones <richard@users.sourceforge.net>
parents:
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155
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parents:
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156 # all body data has been written using wfile
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parents:
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157 return []
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parents:
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158
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diff changeset
159 def preload(self):
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160 """ Trigger pre-loading of imports and templates """
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161 with self.get_tracker():
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162 pass
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163
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164 @contextmanager
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parents: 6061
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165 def get_tracker(self):
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parents: 6061
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166 # get a new instance for each request
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parents: 6061
diff changeset
167 yield roundup.instance.open(self.home, not self.debug)
Roundup Issue Tracker: http://roundup-tracker.org/