Mercurial > piecrust2

annotate piecrust/serving.py @ 112:d31cbbdb4ecc

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Use cache paths that are easier to debug than hashes.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 19 Oct 2014 00:25:02 -0700
parents 208c652551a3
children de257cc40ce1
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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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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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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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73956224eb67 Setup the server better.
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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
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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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diff changeset
134 pipeline = ProcessorPipeline(
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diff changeset
135 app, mounts, self._out_dir,
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diff changeset
136 skip_patterns=self._skip_patterns,
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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(
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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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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
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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
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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)
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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
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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
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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.
Ludovic Chabant <ludovic@chabant.com>
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.
Ludovic Chabant <ludovic@chabant.com>
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.
Ludovic Chabant <ludovic@chabant.com>
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.
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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.
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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.
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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.
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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)
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
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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