Mercurial > piecrust2

annotate piecrust/serving.py @ 50:2fec3ee1298f

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Properly override pages between realms.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 22 Aug 2014 23:41:17 -0700
parents 2f717f961996
children 73956224eb67
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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
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80 # We'll serve page assets directly from where they are.
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81 app.env.base_asset_url_format = '/_asset/%path%'
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82
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83 # See if the requested URL is an asset.
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84 response = self._try_serve_asset(app, environ, request)
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85 if response is not None:
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86 return response(environ, start_response)
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87
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88 # It's not an asset we know of... let's see if it can be a page asset.
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89 response = self._try_serve_page_asset(app, environ, request)
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90 if response is not None:
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91 return response(environ, start_response)
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92
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93 # Nope. Let's hope it's an actual page.
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94 try:
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95 response = self._try_serve_page(app, environ, request)
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96 return response(environ, start_response)
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97 except (RouteNotFoundError, SourceNotFoundError) as ex:
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98 logger.exception(ex)
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99 raise NotFound()
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100 except Exception as ex:
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101 logger.exception(ex)
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102 if app.debug:
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103 raise
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104 raise InternalServerError()
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105
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106 def _try_serve_asset(self, app, environ, request):
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107 logger.debug("Searching for asset with path: %s" % request.path)
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108 rel_req_path = request.path.lstrip('/').replace('/', os.sep)
3
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109 entry = self._record.findEntry(rel_req_path)
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110 if entry is None:
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111 return None
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112
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113 # Yep, we know about this URL because we processed an asset that
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114 # maps to it... make sure it's up to date by re-processing it
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115 # before serving.
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116 mounts = app.assets_dirs
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117 asset_in_path = entry.path
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118 asset_out_path = os.path.join(self._out_dir, rel_req_path)
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119 pipeline = ProcessorPipeline(
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120 app, mounts, self._out_dir,
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121 skip_patterns=self._skip_patterns,
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122 force_patterns=self._force_patterns)
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123 pipeline.run(asset_in_path)
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124
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125 logger.debug("Serving %s" % asset_out_path)
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343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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126 wrapper = wrap_file(environ, open(asset_out_path, 'rb'))
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127 response = Response(wrapper)
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128 _, ext = os.path.splitext(rel_req_path)
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129 response.mimetype = self._mimetype_map.get(
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130 ext.lstrip('.'), 'text/plain')
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diff changeset
131 return response
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diff changeset
132
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diff changeset
133 def _try_serve_page_asset(self, app, environ, request):
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diff changeset
134 if not request.path.startswith('/_asset/'):
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diff changeset
135 return None
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diff changeset
136
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diff changeset
137 full_path = os.path.join(app.root_dir, request.path[len('/_asset/'):])
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diff changeset
138 if not os.path.isfile(full_path):
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diff changeset
139 return None
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diff changeset
140
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diff changeset
141 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
142 wrapper = wrap_file(environ, open(full_path, 'rb'))
3
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diff changeset
143 response = Response(wrapper)
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diff changeset
144 _, ext = os.path.splitext(full_path)
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diff changeset
145 response.mimetype = self._mimetype_map.get(
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diff changeset
146 ext.lstrip('.'), 'text/plain')
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diff changeset
147 return response
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diff changeset
148
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diff changeset
149 def _try_serve_page(self, app, environ, request):
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diff changeset
150 # Try to find what matches the requested URL.
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diff changeset
151 req_path = request.path
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diff changeset
152 page_num = 1
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diff changeset
153 pgn_suffix_re = app.config.get('__cache/pagination_suffix_re')
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diff changeset
154 pgn_suffix_m = re.search(pgn_suffix_re, request.path)
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diff changeset
155 if pgn_suffix_m:
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diff changeset
156 req_path = request.path[:pgn_suffix_m.start()]
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diff changeset
157 page_num = int(pgn_suffix_m.group('num'))
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parents:
diff changeset
158
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diff changeset
159 routes = find_routes(app.routes, req_path)
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diff changeset
160 if len(routes) == 0:
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diff changeset
161 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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diff changeset
162
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diff changeset
163 taxonomy = None
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diff changeset
164 for route, route_metadata in routes:
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diff changeset
165 source = app.getSource(route.source_name)
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diff changeset
166 if route.taxonomy is None:
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
167 rel_path, fac_metadata = source.findPagePath(
3
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diff changeset
168 route_metadata, MODE_PARSING)
11
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parents: 7
diff changeset
169 if rel_path is not None:
3
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diff changeset
170 break
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diff changeset
171 else:
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diff changeset
172 taxonomy = app.getTaxonomy(route.taxonomy)
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diff changeset
173 term_value = route_metadata.get(taxonomy.term_name)
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parents:
diff changeset
174 if term_value is not None:
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parents:
diff changeset
175 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
176 rel_path = tax_page_ref.rel_path
3
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parents:
diff changeset
177 source = tax_page_ref.source
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parents:
diff changeset
178 fac_metadata = {taxonomy.term_name: term_value}
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parents:
diff changeset
179 break
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parents:
diff changeset
180 else:
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diff changeset
181 raise SourceNotFoundError("Can't find path for: %s "
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parents:
diff changeset
182 "(looked in: %s)" %
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parents:
diff changeset
183 (req_path, [r.source_name for r, _ in routes]))
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parents:
diff changeset
184
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parents:
diff changeset
185 # 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
186 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
187 page = fac.buildPage()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
188 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
189 if taxonomy is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
190 flt = PaginationFilter()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
191 if taxonomy.is_multiple:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
192 flt.addClause(HasFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
193 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
194 flt.addClause(IsFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
195 render_ctx.pagination_filter = flt
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parents:
diff changeset
196
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
197 render_ctx.custom_data = {
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
198 taxonomy.term_name: term_value}
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
199 rendered_page = render_page(render_ctx)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
200 rp_content = rendered_page.content
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
201
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
202 if app.debug:
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
203 now_time = time.clock()
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parents: 5
diff changeset
204 timing_info = ('%8.1f ms' %
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
205 ((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
206 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
207 timing_info)
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
208
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
209 # Start response.
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
210 response = Response()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
211
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
212 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
213 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
214 response.status_code = 304
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
215 return response
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
216
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
217 response.set_etag(etag)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
218 response.content_md5 = etag
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 cache_control = response.cache_control
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
221 if app.debug:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
222 cache_control.no_cache = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
223 cache_control.must_revalidate = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
224 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
225 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
226 app.config.get('site/cache_time'))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
227 if cache_time:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
228 cache_control.public = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
229 cache_control.max_age = cache_time
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
230
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
231 content_type = page.config.get('content_type')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
232 if content_type and '/' not in content_type:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
233 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
234 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
235 mimetype = content_type
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
236 if mimetype:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
237 response.mimetype = mimetype
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
238
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239 if ('gzip' in request.accept_encodings and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
240 app.config.get('site/enable_gzip')):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
241 try:
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
242 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
243 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
244 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
245 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
246 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
247 response.content_encoding = 'gzip'
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
248 except Exception:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
249 logger.exception("Error compressing response, "
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
250 "falling back to uncompressed.")
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
251 response.set_data(rp_content)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
252
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
253 return response
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
254
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
255 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
256 path = 'error'
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
257 if isinstance(exception, NotFound):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
258 path = '404'
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
259 env = Environment(loader=ErrorMessageLoader())
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
260 template = env.get_template(path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
261 context = {'details': str(exception)}
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262 response = Response(template.render(context), mimetype='text/html')
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263 return response(environ, start_response)
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264
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265
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266 class WsgiServer(object):
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267 def __init__(self, server):
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268 self.server = server
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269
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270 def __call__(self, environ, start_response):
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271 return self.server._run_request(environ, start_response)
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272
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273
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274 class RouteNotFoundError(Exception):
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275 pass
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276
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277
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278 class SourceNotFoundError(Exception):
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279 pass
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280
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281
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282 content_type_map = {
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283 'html': 'text/html',
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284 'xml': 'text/xml',
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285 'txt': 'text/plain',
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286 'text': 'text/plain',
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287 'css': 'text/css',
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288 'xhtml': 'application/xhtml+xml',
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289 'atom': 'application/atom+xml', # or 'text/xml'?
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290 'rss': 'application/rss+xml', # or 'text/xml'?
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291 'json': 'application/json'}
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292
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293
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294 def find_routes(routes, uri):
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295 uri = uri.lstrip('/')
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296 res = []
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297 for route in routes:
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298 m = route.uri_re.match(uri)
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299 if m:
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300 metadata = m.groupdict()
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301 res.append((route, metadata))
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302 return res
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303
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304
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305 class ErrorMessageLoader(FileSystemLoader):
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306 def __init__(self):
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307 base_dir = os.path.join(os.path.dirname(__file__), 'resources',
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308 'messages')
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309 super(ErrorMessageLoader, self).__init__(base_dir)
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310
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311 def get_source(self, env, template):
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312 template += '.html'
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313 return super(ErrorMessageLoader, self).get_source(env, template)
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314
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315
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316 def load_mimetype_map():
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317 mimetype_map = {}
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318 sep_re = re.compile(r'\s+')
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319 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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320 with open(path, 'r') as f:
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321 for line in f:
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322 tokens = sep_re.split(line)
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323 if len(tokens) > 1:
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324 for t in tokens[1:]:
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325 mimetype_map[t] = tokens[0]
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326 return mimetype_map
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327