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annotate roundup/cgi/wsgi_handler.py @ 7556:273c8c2b5042

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fix(api): - issue2551063 - Rest/Xmlrpc interfaces needs failed login protection. Failed API login rate limiting with expiring lockout added.
author John Rouillard <rouilj@ieee.org>
date Wed, 19 Jul 2023 20:37:45 -0400
parents 07ce4e4110f5
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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64
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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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parents: 5837
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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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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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145 else:
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146 with self.get_tracker() as tracker:
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147 client = tracker.Client(tracker, request, environ, form,
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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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154 html_escape(client.path)))
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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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157 return []
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parents:
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158
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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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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/