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annotate piecrust/serving.py @ 111:208c652551a3

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Quick fix for making the server correctly update referenced pages. Disable the file-system cache for rendered segments when in server mode. We can bring this optimization back when we're actually using the baking record in the server too in order to know dependencies.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 16 Oct 2014 17:03:42 -0700
parents 7f00176a3b4d
children de257cc40ce1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import re
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2 import gzip
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3 import time
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617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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4 import os
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5 import os.path
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6 import hashlib
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7 import logging
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8 import io
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9 from werkzeug.exceptions import (NotFound, MethodNotAllowed,
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10 InternalServerError)
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11 from werkzeug.serving import run_simple
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12 from werkzeug.wrappers import Request, Response
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13 from werkzeug.wsgi import wrap_file
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14 from jinja2 import FileSystemLoader, Environment
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15 from piecrust.app import PieCrust
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16 from piecrust.data.filters import (PaginationFilter, HasFilterClause,
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17 IsFilterClause)
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18 from piecrust.environment import StandardEnvironment
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19 from piecrust.page import Page
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20 from piecrust.processing.base import ProcessorPipeline
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21 from piecrust.rendering import PageRenderingContext, render_page
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22 from piecrust.sources.base import PageFactory, MODE_PARSING
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24
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25 logger = logging.getLogger(__name__)
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27
111
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28 class ServingEnvironment(StandardEnvironment):
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29 def __init__(self):
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30 super(ServingEnvironment, self).__init__()
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31 del self.fs_caches['renders']
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32
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33
3
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34 class Server(object):
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35 def __init__(self, root_dir, host='localhost', port='8080',
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36 debug=False, static_preview=True,
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37 synchronous_asset_pipeline=True):
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38 self.root_dir = root_dir
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39 self.host = host
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40 self.port = port
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41 self.debug = debug
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42 self.static_preview = static_preview
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43 self.synchronous_asset_pipeline = synchronous_asset_pipeline
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44 self._out_dir = None
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45 self._skip_patterns = None
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46 self._force_patterns = None
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47 self._record = None
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48 self._mimetype_map = load_mimetype_map()
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49
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50 def run(self):
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51 # Bake all the assets so we know what we have, and so we can serve
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52 # them to the client. We need a temp app for this.
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53 app = PieCrust(root_dir=self.root_dir, debug=self.debug)
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54 mounts = app.assets_dirs
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55 self._out_dir = os.path.join(app.cache_dir, 'server')
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56 self._skip_patterns = app.config.get('baker/skip_patterns')
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57 self._force_patterns = app.config.get('baker/force_patterns')
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58 pipeline = ProcessorPipeline(
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59 app, mounts, self._out_dir,
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60 skip_patterns=self._skip_patterns,
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61 force_patterns=self._force_patterns)
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62 self._record = pipeline.run()
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63
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64 # Run the WSGI app.
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65 wsgi_wrapper = WsgiServer(self)
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66 run_simple(self.host, self.port, wsgi_wrapper,
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67 use_debugger=True, use_reloader=True)
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68
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69 def _run_request(self, environ, start_response):
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70 try:
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71 return self._run_piecrust(environ, start_response)
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72 except Exception as ex:
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73 if self.debug:
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74 raise
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75 return self._handle_error(ex, environ, start_response)
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76
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77 def _run_piecrust(self, environ, start_response):
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78 request = Request(environ)
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79
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80 # We don't support anything else than GET requests since we're
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81 # previewing something that will be static later.
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82 if self.static_preview and request.method != 'GET':
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83 logger.error("Only GET requests are allowed, got %s" % request.method)
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84 raise MethodNotAllowed()
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85
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86 # Create the app for this request.
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87 env = ServingEnvironment()
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88 app = PieCrust(root_dir=self.root_dir, debug=self.debug, env=env)
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89 app.config.set('site/root', '/')
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90 app.config.set('site/pretty_urls', True)
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91 app.config.set('server/is_serving', True)
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92
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93 # We'll serve page assets directly from where they are.
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94 app.env.base_asset_url_format = '/_asset/%path%'
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95
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96 # See if the requested URL is an asset.
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97 response = self._try_serve_asset(app, environ, request)
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98 if response is not None:
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99 return response(environ, start_response)
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100
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101 # It's not an asset we know of... let's see if it can be a page asset.
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102 response = self._try_serve_page_asset(app, environ, request)
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103 if response is not None:
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104 return response(environ, start_response)
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105
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106 # Nope. Let's hope it's an actual page.
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107 try:
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108 response = self._try_serve_page(app, environ, request)
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109 return response(environ, start_response)
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110 except (RouteNotFoundError, SourceNotFoundError) as ex:
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111 logger.exception(ex)
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112 raise NotFound()
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113 except Exception as ex:
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114 logger.exception(ex)
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115 if app.debug:
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116 raise
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117 raise InternalServerError()
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118
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119 def _try_serve_asset(self, app, environ, request):
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120 logger.debug("Searching for asset with path: %s" % request.path)
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121 rel_req_path = request.path.lstrip('/').replace('/', os.sep)
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122 entry = self._record.findEntry(rel_req_path)
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123 if entry is None:
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124 return None
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125
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126 # Yep, we know about this URL because we processed an asset that
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127 # maps to it... make sure it's up to date by re-processing it
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128 # before serving.
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129 mounts = app.assets_dirs
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130 asset_in_path = entry.path
3
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parents:
diff changeset
131 asset_out_path = os.path.join(self._out_dir, rel_req_path)
110
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diff changeset
132
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diff changeset
133 if self.synchronous_asset_pipeline:
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parents: 53
diff changeset
134 pipeline = ProcessorPipeline(
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parents: 53
diff changeset
135 app, mounts, self._out_dir,
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parents: 53
diff changeset
136 skip_patterns=self._skip_patterns,
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parents: 53
diff changeset
137 force_patterns=self._force_patterns)
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parents: 53
diff changeset
138 pipeline.run(asset_in_path)
3
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diff changeset
139
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diff changeset
140 logger.debug("Serving %s" % asset_out_path)
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
141 wrapper = wrap_file(environ, open(asset_out_path, 'rb'))
3
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diff changeset
142 response = Response(wrapper)
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diff changeset
143 _, ext = os.path.splitext(rel_req_path)
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diff changeset
144 response.mimetype = self._mimetype_map.get(
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
145 ext.lstrip('.'), 'text/plain')
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parents:
diff changeset
146 return response
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parents:
diff changeset
147
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diff changeset
148 def _try_serve_page_asset(self, app, environ, request):
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diff changeset
149 if not request.path.startswith('/_asset/'):
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diff changeset
150 return None
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diff changeset
151
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diff changeset
152 full_path = os.path.join(app.root_dir, request.path[len('/_asset/'):])
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diff changeset
153 if not os.path.isfile(full_path):
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diff changeset
154 return None
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parents:
diff changeset
155
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diff changeset
156 logger.debug("Serving %s" % full_path)
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
157 wrapper = wrap_file(environ, open(full_path, 'rb'))
3
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diff changeset
158 response = Response(wrapper)
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diff changeset
159 _, ext = os.path.splitext(full_path)
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diff changeset
160 response.mimetype = self._mimetype_map.get(
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diff changeset
161 ext.lstrip('.'), 'text/plain')
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diff changeset
162 return response
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diff changeset
163
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diff changeset
164 def _try_serve_page(self, app, environ, request):
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165 # Try to find what matches the requested URL.
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diff changeset
166 req_path = request.path
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diff changeset
167 page_num = 1
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diff changeset
168 pgn_suffix_re = app.config.get('__cache/pagination_suffix_re')
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diff changeset
169 pgn_suffix_m = re.search(pgn_suffix_re, request.path)
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diff changeset
170 if pgn_suffix_m:
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diff changeset
171 req_path = request.path[:pgn_suffix_m.start()]
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diff changeset
172 page_num = int(pgn_suffix_m.group('num'))
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parents:
diff changeset
173
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diff changeset
174 routes = find_routes(app.routes, req_path)
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diff changeset
175 if len(routes) == 0:
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diff changeset
176 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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parents:
diff changeset
177
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diff changeset
178 taxonomy = None
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diff changeset
179 for route, route_metadata in routes:
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diff changeset
180 source = app.getSource(route.source_name)
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parents:
diff changeset
181 if route.taxonomy is None:
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
182 rel_path, fac_metadata = source.findPagePath(
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
183 route_metadata, MODE_PARSING)
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
184 if rel_path is not None:
3
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parents:
diff changeset
185 break
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parents:
diff changeset
186 else:
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diff changeset
187 taxonomy = app.getTaxonomy(route.taxonomy)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
188 term_value = route_metadata.get(taxonomy.term_name)
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parents:
diff changeset
189 if term_value is not None:
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parents:
diff changeset
190 tax_page_ref = taxonomy.getPageRef(source.name)
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
191 rel_path = tax_page_ref.rel_path
3
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parents:
diff changeset
192 source = tax_page_ref.source
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
193 fac_metadata = {taxonomy.term_name: term_value}
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
194 break
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parents:
diff changeset
195 else:
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parents:
diff changeset
196 raise SourceNotFoundError("Can't find path for: %s "
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parents:
diff changeset
197 "(looked in: %s)" %
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parents:
diff changeset
198 (req_path, [r.source_name for r, _ in routes]))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
199
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
200 # Build the page and render it.
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
201 fac = PageFactory(source, rel_path, fac_metadata)
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
202 page = fac.buildPage()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
203 render_ctx = PageRenderingContext(page, req_path, page_num)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
204 if taxonomy is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
205 flt = PaginationFilter()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
206 if taxonomy.is_multiple:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
207 flt.addClause(HasFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
208 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
209 flt.addClause(IsFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
210 render_ctx.pagination_filter = flt
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
211
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
212 render_ctx.custom_data = {
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
213 taxonomy.term_name: term_value}
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
214 rendered_page = render_page(render_ctx)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
215 rp_content = rendered_page.content
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
216
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
217 if app.debug:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
218 now_time = time.clock()
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parents: 5
diff changeset
219 timing_info = ('%8.1f ms' %
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
220 ((now_time - app.env.start_time) * 1000.0))
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
221 rp_content = rp_content.replace('__PIECRUST_TIMING_INFORMATION__',
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
222 timing_info)
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
223
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
224 # Start response.
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
225 response = Response()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
226
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
227 etag = hashlib.md5(rp_content.encode('utf8')).hexdigest()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
228 if not app.debug and etag in request.if_none_match:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
229 response.status_code = 304
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
230 return response
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
231
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
232 response.set_etag(etag)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
233 response.content_md5 = etag
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
234
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
235 cache_control = response.cache_control
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
236 if app.debug:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
237 cache_control.no_cache = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
238 cache_control.must_revalidate = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
240 cache_time = (page.config.get('cache_time') or
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
241 app.config.get('site/cache_time'))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
242 if cache_time:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
243 cache_control.public = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
244 cache_control.max_age = cache_time
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
245
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
246 content_type = page.config.get('content_type')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
247 if content_type and '/' not in content_type:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
248 mimetype = content_type_map.get(content_type, content_type)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
249 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
250 mimetype = content_type
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
251 if mimetype:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
252 response.mimetype = mimetype
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
253
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
254 if ('gzip' in request.accept_encodings and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
255 app.config.get('site/enable_gzip')):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
256 try:
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
257 with io.BytesIO() as gzip_buffer:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
258 with gzip.open(gzip_buffer, mode='wt',
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
259 encoding='utf8') as gzip_file:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
260 gzip_file.write(rp_content)
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261 rp_content = gzip_buffer.getvalue()
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262 response.content_encoding = 'gzip'
3
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263 except Exception:
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264 logger.exception("Error compressing response, "
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265 "falling back to uncompressed.")
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266 response.set_data(rp_content)
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267
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268 return response
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269
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270 def _handle_error(self, exception, environ, start_response):
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271 path = 'error'
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272 if isinstance(exception, NotFound):
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273 path = '404'
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274 env = Environment(loader=ErrorMessageLoader())
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275 template = env.get_template(path)
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276 context = {'details': str(exception)}
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277 response = Response(template.render(context), mimetype='text/html')
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278 return response(environ, start_response)
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279
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280
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281 class WsgiServer(object):
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282 def __init__(self, server):
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283 self.server = server
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284
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285 def __call__(self, environ, start_response):
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286 return self.server._run_request(environ, start_response)
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287
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288
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289 class RouteNotFoundError(Exception):
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290 pass
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291
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292
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293 class SourceNotFoundError(Exception):
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294 pass
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295
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296
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297 content_type_map = {
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298 'html': 'text/html',
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299 'xml': 'text/xml',
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300 'txt': 'text/plain',
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301 'text': 'text/plain',
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302 'css': 'text/css',
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303 'xhtml': 'application/xhtml+xml',
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304 'atom': 'application/atom+xml', # or 'text/xml'?
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305 'rss': 'application/rss+xml', # or 'text/xml'?
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306 'json': 'application/json'}
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307
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308
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309 def find_routes(routes, uri):
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310 uri = uri.lstrip('/')
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311 res = []
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312 for route in routes:
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313 m = route.uri_re.match(uri)
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314 if m:
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315 metadata = m.groupdict()
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316 res.append((route, metadata))
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317 return res
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318
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319
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320 class ErrorMessageLoader(FileSystemLoader):
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321 def __init__(self):
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322 base_dir = os.path.join(os.path.dirname(__file__), 'resources',
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323 'messages')
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324 super(ErrorMessageLoader, self).__init__(base_dir)
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325
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326 def get_source(self, env, template):
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327 template += '.html'
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328 return super(ErrorMessageLoader, self).get_source(env, template)
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329
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330
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331 def load_mimetype_map():
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332 mimetype_map = {}
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333 sep_re = re.compile(r'\s+')
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334 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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335 with open(path, 'r') as f:
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336 for line in f:
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337 tokens = sep_re.split(line)
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338 if len(tokens) > 1:
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339 for t in tokens[1:]:
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340 mimetype_map[t] = tokens[0]
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341 return mimetype_map
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342