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annotate roundup/cgi/wsgi_handler.py @ 7478:e8d2a4bca16a

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Update index. Add "track your issues your way" tag line and... Add description of benefits to some of the noteworthy changes. Add GTD "thing management" from old email in the 1.6 time period. Reverse order of fast gratification so source directory is first then venv install. Match the first line that says you don't have to install.
author John Rouillard <rouilj@ieee.org>
date Sun, 11 Jun 2023 21:32:46 -0400
parents 07ce4e4110f5
children 273c8c2b5042
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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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24
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25 class Headers(object):
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26 """ Idea more or less stolen from the 'apache.py' in same directory.
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27 Except that wsgi stores http headers in environment.
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28 """
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29 def __init__(self, environ):
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30 self.environ = environ
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31
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32 def mangle_name(self, name):
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33 """ Content-Type is handled specially, it doesn't have a HTTP_
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34 prefix in cgi.
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35 """
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36 n = name.replace('-', '_').upper()
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37 if n == 'CONTENT_TYPE':
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38 return n
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39 return 'HTTP_' + n
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40
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41 def get(self, name, default=None):
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42 return self.environ.get(self.mangle_name(name), default)
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43 getheader = get
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44
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46 class Writer(object):
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47 '''Perform a start_response if need be when we start writing.'''
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48 def __init__(self, request):
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49 self.request = request # weakref.ref(request)
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50
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51 def write(self, data):
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52 f = self.request.get_wfile()
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53 self.write = f
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54 return self.write(data)
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55
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56
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57 class RequestHandler(object):
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58 def __init__(self, environ, start_response):
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59 self.__start_response = start_response
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60 self.__wfile = None
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61 self.headers = Headers(environ)
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62 self.rfile, self.wfile = None, Writer(self)
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63
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64 def start_response(self, headers, response_code):
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65 """Set HTTP response code"""
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66 message, explain = BaseHTTPRequestHandler.responses[response_code]
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67 self.__wfile = self.__start_response('%d %s' % (response_code,
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68 message), headers)
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69
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70 def get_wfile(self):
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71 if self.__wfile is None:
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72 raise ValueError('start_response() not called')
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73 return self.__wfile
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74
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75
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76 class RequestDispatcher(object):
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77 def __init__(self, home, debug=False, timing=False, lang=None,
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78 feature_flags=None):
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79 assert os.path.isdir(home), '%r is not a directory' % (home,)
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80 self.home = home
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81 self.debug = debug
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82 self.timing = timing
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83 self.feature_flags = feature_flags or {}
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84 self.tracker = None
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85 if lang:
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86 self.translator = TranslationService.get_translation(
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87 lang,
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88 tracker_home=home)
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89 else:
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90 self.translator = None
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91
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92 if "cache_tracker" in self.feature_flags:
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93 self.tracker = roundup.instance.open(self.home, not self.debug)
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94 else:
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95 self.preload()
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96
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97 def __call__(self, environ, start_response):
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98 """Initialize with `apache.Request` object"""
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99 request = RequestHandler(environ, start_response)
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100
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101 if environ['REQUEST_METHOD'] == 'OPTIONS':
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102 if environ["PATH_INFO"][:5] == "/rest":
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103 # rest does support options
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104 # This I hope will result in self.form=None
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105 environ['CONTENT_LENGTH'] = 0
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106 else:
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107 code = 501
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108 message, explain = BaseHTTPRequestHandler.responses[code]
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109 request.start_response([('Content-Type', 'text/html')],
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110 code)
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111 request.wfile.write(s2b(DEFAULT_ERROR_MESSAGE % locals()))
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112 return []
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113
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114 # need to strip the leading '/'
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115 environ["PATH_INFO"] = environ["PATH_INFO"][1:]
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116 if self.timing:
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117 environ["CGI_SHOW_TIMING"] = self.timing
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118
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119 if environ['REQUEST_METHOD'] in ("OPTIONS", "DELETE"):
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120 # these methods have no data. When we init tracker.Client
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121 # set form to None to get a properly initialized empty
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122 # form.
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123 form = None
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124 else:
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125 form = BinaryFieldStorage(fp=environ['wsgi.input'], environ=environ)
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126
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127 if "cache_tracker" in self.feature_flags:
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128 client = self.tracker.Client(self.tracker, request, environ, form,
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129 self.translator)
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130 try:
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131 client.main()
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132 except roundup.cgi.client.NotFound:
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133 request.start_response([('Content-Type', 'text/html')], 404)
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134 request.wfile.write(s2b('Not found: %s' %
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135 html_escape(client.path)))
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136 else:
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137 with self.get_tracker() as tracker:
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138 client = tracker.Client(tracker, request, environ, form,
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139 self.translator)
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140 try:
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141 client.main()
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142 except roundup.cgi.client.NotFound:
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143 request.start_response([('Content-Type', 'text/html')], 404)
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144 request.wfile.write(s2b('Not found: %s' %
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145 html_escape(client.path)))
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parents:
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146
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147 # all body data has been written using wfile
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148 return []
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149
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150 def preload(self):
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151 """ Trigger pre-loading of imports and templates """
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152 with self.get_tracker():
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153 pass
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154
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155 @contextmanager
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156 def get_tracker(self):
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157 # get a new instance for each request
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158 yield roundup.instance.open(self.home, not self.debug)
Roundup Issue Tracker: http://roundup-tracker.org/