Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/routes/middleware.py @ 4:79f47841a781 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:47:39 -0400
parents 26e78fe6e8c4
children
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1 """Routes WSGI Middleware"""
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2 import re
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3 import logging
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4
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5 from webob import Request
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6
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7 from routes.base import request_config
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8 from routes.util import URLGenerator
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9
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10 log = logging.getLogger('routes.middleware')
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11
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12
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13 class RoutesMiddleware(object):
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14 """Routing middleware that handles resolving the PATH_INFO in
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15 addition to optionally recognizing method overriding.
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16
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17 .. Note::
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18 This module requires webob to be installed. To depend on it, you may
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19 list routes[middleware] in your ``requirements.txt``
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20 """
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21 def __init__(self, wsgi_app, mapper, use_method_override=True,
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22 path_info=True, singleton=True):
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23 """Create a Route middleware object
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24
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25 Using the use_method_override keyword will require Paste to be
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26 installed, and your application should use Paste's WSGIRequest
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27 object as it will properly handle POST issues with wsgi.input
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28 should Routes check it.
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29
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30 If path_info is True, then should a route var contain
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31 path_info, the SCRIPT_NAME and PATH_INFO will be altered
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32 accordingly. This should be used with routes like:
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33
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34 .. code-block:: python
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35
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36 map.connect('blog/*path_info', controller='blog', path_info='')
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37
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38 """
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39 self.app = wsgi_app
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40 self.mapper = mapper
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41 self.singleton = singleton
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42 self.use_method_override = use_method_override
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43 self.path_info = path_info
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44 self.log_debug = logging.DEBUG >= log.getEffectiveLevel()
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45 if self.log_debug:
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46 log.debug("Initialized with method overriding = %s, and path "
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47 "info altering = %s", use_method_override, path_info)
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48
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49 def __call__(self, environ, start_response):
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50 """Resolves the URL in PATH_INFO, and uses wsgi.routing_args
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51 to pass on URL resolver results."""
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52 old_method = None
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53 if self.use_method_override:
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54 req = None
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55
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56 # In some odd cases, there's no query string
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57 try:
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58 qs = environ['QUERY_STRING']
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59 except KeyError:
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60 qs = ''
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61 if '_method' in qs:
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62 req = Request(environ)
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63 req.errors = 'ignore'
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64 if '_method' in req.GET:
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65 old_method = environ['REQUEST_METHOD']
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66 environ['REQUEST_METHOD'] = req.GET['_method'].upper()
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67 if self.log_debug:
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68 log.debug("_method found in QUERY_STRING, altering "
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69 "request method to %s",
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70 environ['REQUEST_METHOD'])
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71 elif environ['REQUEST_METHOD'] == 'POST' and is_form_post(environ):
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72 if req is None:
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73 req = Request(environ)
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74 req.errors = 'ignore'
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75 if '_method' in req.POST:
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76 old_method = environ['REQUEST_METHOD']
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77 environ['REQUEST_METHOD'] = req.POST['_method'].upper()
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78 if self.log_debug:
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79 log.debug("_method found in POST data, altering "
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80 "request method to %s",
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81 environ['REQUEST_METHOD'])
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82
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83 # Run the actual route matching
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84 # -- Assignment of environ to config triggers route matching
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85 if self.singleton:
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86 config = request_config()
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87 config.mapper = self.mapper
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88 config.environ = environ
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89 match = config.mapper_dict
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90 route = config.route
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91 else:
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92 results = self.mapper.routematch(environ=environ)
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93 if results:
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94 match, route = results[0], results[1]
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95 else:
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96 match = route = None
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97
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98 if old_method:
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99 environ['REQUEST_METHOD'] = old_method
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100
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101 if not match:
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102 match = {}
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103 if self.log_debug:
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104 urlinfo = "%s %s" % (environ['REQUEST_METHOD'],
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105 environ['PATH_INFO'])
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106 log.debug("No route matched for %s", urlinfo)
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107 elif self.log_debug:
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108 urlinfo = "%s %s" % (environ['REQUEST_METHOD'],
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109 environ['PATH_INFO'])
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110 log.debug("Matched %s", urlinfo)
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111 log.debug("Route path: '%s', defaults: %s", route.routepath,
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112 route.defaults)
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113 log.debug("Match dict: %s", match)
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114
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115 url = URLGenerator(self.mapper, environ)
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116 environ['wsgiorg.routing_args'] = ((url), match)
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117 environ['routes.route'] = route
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118 environ['routes.url'] = url
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119
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120 if route and route.redirect:
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121 route_name = '_redirect_%s' % id(route)
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122 location = url(route_name, **match)
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123 log.debug("Using redirect route, redirect to '%s' with status"
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124 "code: %s", location, route.redirect_status)
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125 start_response(route.redirect_status,
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126 [('Content-Type', 'text/plain; charset=utf8'),
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127 ('Location', location)])
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128 return []
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129
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130 # If the route included a path_info attribute and it should be used to
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131 # alter the environ, we'll pull it out
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132 if self.path_info and 'path_info' in match:
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133 oldpath = environ['PATH_INFO']
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134 newpath = match.get('path_info') or ''
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135 environ['PATH_INFO'] = newpath
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136 if not environ['PATH_INFO'].startswith('/'):
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137 environ['PATH_INFO'] = '/' + environ['PATH_INFO']
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138 environ['SCRIPT_NAME'] += re.sub(
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139 r'^(.*?)/' + re.escape(newpath) + '$', r'\1', oldpath)
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140
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141 response = self.app(environ, start_response)
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142
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143 # Wrapped in try as in rare cases the attribute will be gone already
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144 try:
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145 del self.mapper.environ
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146 except AttributeError:
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147 pass
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148 return response
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149
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150
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151 def is_form_post(environ):
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152 """Determine whether the request is a POSTed html form"""
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153 content_type = environ.get('CONTENT_TYPE', '').lower()
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154 if ';' in content_type:
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155 content_type = content_type.split(';', 1)[0]
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156 return content_type in ('application/x-www-form-urlencoded',
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157 'multipart/form-data')