Mercurial > piecrust2

annotate piecrust/serving.py @ 53:73956224eb67

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Setup the server better.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 25 Aug 2014 08:45:44 -0700
parents 2f717f961996
children 7f00176a3b4d
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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.page import Page
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19 from piecrust.processing.base import ProcessorPipeline
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20 from piecrust.rendering import PageRenderingContext, render_page
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21 from piecrust.sources.base import PageFactory, MODE_PARSING
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22
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23
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24 logger = logging.getLogger(__name__)
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25
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26
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27 class Server(object):
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28 def __init__(self, root_dir, host='localhost', port='8080',
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29 debug=False, static_preview=True):
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30 self.root_dir = root_dir
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31 self.host = host
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32 self.port = port
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33 self.debug = debug
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34 self.static_preview = static_preview
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35 self._out_dir = None
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36 self._skip_patterns = None
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37 self._force_patterns = None
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38 self._record = None
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39 self._mimetype_map = load_mimetype_map()
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40
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41 def run(self):
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42 # Bake all the assets so we know what we have, and so we can serve
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43 # them to the client. We need a temp app for this.
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44 app = PieCrust(root_dir=self.root_dir, debug=self.debug)
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45 mounts = app.assets_dirs
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46 self._out_dir = os.path.join(app.cache_dir, 'server')
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47 self._skip_patterns = app.config.get('baker/skip_patterns')
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48 self._force_patterns = app.config.get('baker/force_patterns')
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49 pipeline = ProcessorPipeline(
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50 app, mounts, self._out_dir,
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51 skip_patterns=self._skip_patterns,
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52 force_patterns=self._force_patterns)
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53 self._record = pipeline.run()
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54
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55 # Run the WSGI app.
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56 wsgi_wrapper = WsgiServer(self)
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57 run_simple(self.host, self.port, wsgi_wrapper,
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58 use_debugger=True, use_reloader=True)
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59
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60 def _run_request(self, environ, start_response):
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61 try:
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62 return self._run_piecrust(environ, start_response)
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63 except Exception as ex:
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64 if self.debug:
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65 raise
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66 return self._handle_error(ex, environ, start_response)
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67
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68 def _run_piecrust(self, environ, start_response):
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69 request = Request(environ)
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70
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71 # We don't support anything else than GET requests since we're
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72 # previewing something that will be static later.
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73 if self.static_preview and request.method != 'GET':
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74 logger.error("Only GET requests are allowed, got %s" % request.method)
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75 raise MethodNotAllowed()
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76
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77 # Create the app for this request.
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78 app = PieCrust(root_dir=self.root_dir, debug=self.debug)
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79 app.config.set('site/root', '/')
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80 app.config.set('site/pretty_urls', True)
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81 app.config.set('server/is_serving', True)
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82
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83 # We'll serve page assets directly from where they are.
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84 app.env.base_asset_url_format = '/_asset/%path%'
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85
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86 # See if the requested URL is an asset.
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87 response = self._try_serve_asset(app, environ, request)
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88 if response is not None:
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89 return response(environ, start_response)
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90
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91 # It's not an asset we know of... let's see if it can be a page asset.
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92 response = self._try_serve_page_asset(app, environ, request)
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93 if response is not None:
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94 return response(environ, start_response)
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95
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96 # Nope. Let's hope it's an actual page.
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97 try:
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98 response = self._try_serve_page(app, environ, request)
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99 return response(environ, start_response)
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100 except (RouteNotFoundError, SourceNotFoundError) as ex:
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101 logger.exception(ex)
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102 raise NotFound()
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103 except Exception as ex:
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104 logger.exception(ex)
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105 if app.debug:
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106 raise
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107 raise InternalServerError()
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108
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109 def _try_serve_asset(self, app, environ, request):
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110 logger.debug("Searching for asset with path: %s" % request.path)
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111 rel_req_path = request.path.lstrip('/').replace('/', os.sep)
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112 entry = self._record.findEntry(rel_req_path)
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113 if entry is None:
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114 return None
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115
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116 # Yep, we know about this URL because we processed an asset that
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117 # maps to it... make sure it's up to date by re-processing it
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118 # before serving.
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119 mounts = app.assets_dirs
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120 asset_in_path = entry.path
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121 asset_out_path = os.path.join(self._out_dir, rel_req_path)
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122 pipeline = ProcessorPipeline(
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123 app, mounts, self._out_dir,
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124 skip_patterns=self._skip_patterns,
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125 force_patterns=self._force_patterns)
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126 pipeline.run(asset_in_path)
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127
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128 logger.debug("Serving %s" % asset_out_path)
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129 wrapper = wrap_file(environ, open(asset_out_path, 'rb'))
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130 response = Response(wrapper)
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131 _, ext = os.path.splitext(rel_req_path)
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diff changeset
132 response.mimetype = self._mimetype_map.get(
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parents:
diff changeset
133 ext.lstrip('.'), 'text/plain')
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parents:
diff changeset
134 return response
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parents:
diff changeset
135
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diff changeset
136 def _try_serve_page_asset(self, app, environ, request):
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diff changeset
137 if not request.path.startswith('/_asset/'):
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parents:
diff changeset
138 return None
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diff changeset
139
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diff changeset
140 full_path = os.path.join(app.root_dir, request.path[len('/_asset/'):])
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diff changeset
141 if not os.path.isfile(full_path):
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diff changeset
142 return None
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parents:
diff changeset
143
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diff changeset
144 logger.debug("Serving %s" % full_path)
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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diff changeset
145 wrapper = wrap_file(environ, open(full_path, 'rb'))
3
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diff changeset
146 response = Response(wrapper)
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diff changeset
147 _, ext = os.path.splitext(full_path)
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diff changeset
148 response.mimetype = self._mimetype_map.get(
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diff changeset
149 ext.lstrip('.'), 'text/plain')
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diff changeset
150 return response
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parents:
diff changeset
151
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diff changeset
152 def _try_serve_page(self, app, environ, request):
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diff changeset
153 # Try to find what matches the requested URL.
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diff changeset
154 req_path = request.path
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diff changeset
155 page_num = 1
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diff changeset
156 pgn_suffix_re = app.config.get('__cache/pagination_suffix_re')
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diff changeset
157 pgn_suffix_m = re.search(pgn_suffix_re, request.path)
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diff changeset
158 if pgn_suffix_m:
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diff changeset
159 req_path = request.path[:pgn_suffix_m.start()]
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diff changeset
160 page_num = int(pgn_suffix_m.group('num'))
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parents:
diff changeset
161
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diff changeset
162 routes = find_routes(app.routes, req_path)
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diff changeset
163 if len(routes) == 0:
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diff changeset
164 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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diff changeset
165
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diff changeset
166 taxonomy = None
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diff changeset
167 for route, route_metadata in routes:
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diff changeset
168 source = app.getSource(route.source_name)
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diff changeset
169 if route.taxonomy is None:
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
170 rel_path, fac_metadata = source.findPagePath(
3
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diff changeset
171 route_metadata, MODE_PARSING)
11
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diff changeset
172 if rel_path is not None:
3
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diff changeset
173 break
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parents:
diff changeset
174 else:
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diff changeset
175 taxonomy = app.getTaxonomy(route.taxonomy)
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parents:
diff changeset
176 term_value = route_metadata.get(taxonomy.term_name)
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parents:
diff changeset
177 if term_value is not None:
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parents:
diff changeset
178 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
179 rel_path = tax_page_ref.rel_path
3
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parents:
diff changeset
180 source = tax_page_ref.source
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parents:
diff changeset
181 fac_metadata = {taxonomy.term_name: term_value}
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parents:
diff changeset
182 break
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parents:
diff changeset
183 else:
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parents:
diff changeset
184 raise SourceNotFoundError("Can't find path for: %s "
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parents:
diff changeset
185 "(looked in: %s)" %
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parents:
diff changeset
186 (req_path, [r.source_name for r, _ in routes]))
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parents:
diff changeset
187
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parents:
diff changeset
188 # 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
189 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
190 page = fac.buildPage()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
191 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
192 if taxonomy is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
193 flt = PaginationFilter()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
194 if taxonomy.is_multiple:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
195 flt.addClause(HasFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
196 else:
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parents:
diff changeset
197 flt.addClause(IsFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
198 render_ctx.pagination_filter = flt
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 render_ctx.custom_data = {
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
201 taxonomy.term_name: term_value}
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
202 rendered_page = render_page(render_ctx)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
203 rp_content = rendered_page.content
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
204
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
205 if app.debug:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
206 now_time = time.clock()
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Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
207 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
208 ((now_time - app.env.start_time) * 1000.0))
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
209 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
210 timing_info)
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
211
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
212 # Start response.
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
213 response = Response()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
214
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
215 etag = hashlib.md5(rp_content.encode('utf8')).hexdigest()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
216 if not app.debug and etag in request.if_none_match:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
217 response.status_code = 304
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
218 return response
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
219
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
220 response.set_etag(etag)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
221 response.content_md5 = etag
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
222
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
223 cache_control = response.cache_control
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
224 if app.debug:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
225 cache_control.no_cache = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
226 cache_control.must_revalidate = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
227 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
228 cache_time = (page.config.get('cache_time') or
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
229 app.config.get('site/cache_time'))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
230 if cache_time:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
231 cache_control.public = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
232 cache_control.max_age = cache_time
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
233
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
234 content_type = page.config.get('content_type')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
235 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
236 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
237 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
238 mimetype = content_type
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239 if mimetype:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
240 response.mimetype = mimetype
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
241
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
242 if ('gzip' in request.accept_encodings and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
243 app.config.get('site/enable_gzip')):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
244 try:
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
245 with io.BytesIO() as gzip_buffer:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
246 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
247 encoding='utf8') as gzip_file:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
248 gzip_file.write(rp_content)
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
249 rp_content = gzip_buffer.getvalue()
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
250 response.content_encoding = 'gzip'
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
251 except Exception:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
252 logger.exception("Error compressing response, "
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
253 "falling back to uncompressed.")
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
254 response.set_data(rp_content)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
255
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
256 return response
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
257
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
258 def _handle_error(self, exception, environ, start_response):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
259 path = 'error'
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
260 if isinstance(exception, NotFound):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
261 path = '404'
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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262 env = Environment(loader=ErrorMessageLoader())
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263 template = env.get_template(path)
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264 context = {'details': str(exception)}
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265 response = Response(template.render(context), mimetype='text/html')
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266 return response(environ, start_response)
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267
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268
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269 class WsgiServer(object):
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270 def __init__(self, server):
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271 self.server = server
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272
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273 def __call__(self, environ, start_response):
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274 return self.server._run_request(environ, start_response)
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275
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276
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277 class RouteNotFoundError(Exception):
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278 pass
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279
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280
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281 class SourceNotFoundError(Exception):
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282 pass
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283
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284
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285 content_type_map = {
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286 'html': 'text/html',
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287 'xml': 'text/xml',
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288 'txt': 'text/plain',
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289 'text': 'text/plain',
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290 'css': 'text/css',
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291 'xhtml': 'application/xhtml+xml',
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292 'atom': 'application/atom+xml', # or 'text/xml'?
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293 'rss': 'application/rss+xml', # or 'text/xml'?
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294 'json': 'application/json'}
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295
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296
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297 def find_routes(routes, uri):
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298 uri = uri.lstrip('/')
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299 res = []
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300 for route in routes:
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301 m = route.uri_re.match(uri)
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302 if m:
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303 metadata = m.groupdict()
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304 res.append((route, metadata))
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305 return res
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306
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307
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308 class ErrorMessageLoader(FileSystemLoader):
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309 def __init__(self):
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310 base_dir = os.path.join(os.path.dirname(__file__), 'resources',
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311 'messages')
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312 super(ErrorMessageLoader, self).__init__(base_dir)
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313
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314 def get_source(self, env, template):
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315 template += '.html'
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316 return super(ErrorMessageLoader, self).get_source(env, template)
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317
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318
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319 def load_mimetype_map():
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320 mimetype_map = {}
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321 sep_re = re.compile(r'\s+')
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322 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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323 with open(path, 'r') as f:
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324 for line in f:
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325 tokens = sep_re.split(line)
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326 if len(tokens) > 1:
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327 for t in tokens[1:]:
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328 mimetype_map[t] = tokens[0]
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329 return mimetype_map
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330