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annotate roundup/cgi/wsgi_handler.py @ 6546:c58c7cd31243

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issue2550991 - Some mechanism to set expiration header or max age for static resources Work was done in 2.0.0 to add support for cache control headers. This checkin sets default values for javascript (2 weeks) and css (2 month) files.
author John Rouillard <rouilj@ieee.org>
date Thu, 09 Dec 2021 17:36:08 -0500
parents 0da655d1498d
children d32d43e4a5ba
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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 assert os.path.isdir(home), '%r is not a directory' % (home,)
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79 self.home = home
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80 self.debug = debug
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81 self.timing = timing
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82 if lang:
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83 self.translator = TranslationService.get_translation(lang,
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84 tracker_home=home)
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85 else:
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86 self.translator = None
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87 self.preload()
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88
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89 def __call__(self, environ, start_response):
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90 """Initialize with `apache.Request` object"""
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91 request = RequestHandler(environ, start_response)
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92
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93 if environ['REQUEST_METHOD'] == 'OPTIONS':
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94 if environ["PATH_INFO"][:5] == "/rest":
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95 # rest does support options
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96 # This I hope will result in self.form=None
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97 environ['CONTENT_LENGTH'] = 0
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98 else:
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99 code = 501
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100 message, explain = BaseHTTPRequestHandler.responses[code]
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101 request.start_response([('Content-Type', 'text/html')],
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102 code)
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103 request.wfile.write(s2b(DEFAULT_ERROR_MESSAGE % locals()))
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104 return []
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105
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106 # need to strip the leading '/'
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107 environ["PATH_INFO"] = environ["PATH_INFO"][1:]
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108 if self.timing:
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109 environ["CGI_SHOW_TIMING"] = self.timing
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110
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111 if environ['REQUEST_METHOD'] in ("OPTIONS", "DELETE"):
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112 # these methods have no data. When we init tracker.Client
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113 # set form to None to get a properly initialized empty
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114 # form.
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115 form = None
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116 else:
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117 form = BinaryFieldStorage(fp=environ['wsgi.input'], environ=environ)
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118
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119 with self.get_tracker() as tracker:
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120 client = tracker.Client(tracker, request, environ, form,
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121 self.translator)
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122 try:
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123 client.main()
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124 except roundup.cgi.client.NotFound:
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125 request.start_response([('Content-Type', 'text/html')], 404)
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126 request.wfile.write(s2b('Not found: %s' %
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127 html_escape(client.path)))
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128
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129 # all body data has been written using wfile
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130 return []
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131
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132 def preload(self):
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133 """ Trigger pre-loading of imports and templates """
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134 with self.get_tracker():
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135 pass
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136
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137 @contextmanager
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138 def get_tracker(self):
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139 # get a new instance for each request
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140 yield roundup.instance.open(self.home, not self.debug)
Roundup Issue Tracker: http://roundup-tracker.org/