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annotate piecrust/serving.py @ 11:617191dec18e

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Fixes for Windows, make `findPagePath` return a ref path.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 18 Aug 2014 16:47:44 -0700
parents 343d08ef5668
children 2f717f961996
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import re
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2 import gzip
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3 import time
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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4 import os
3
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5 import os.path
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6 import hashlib
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7 import logging
5
474c9882decf Upgrade to Python 3.
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8 import io
3
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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
3
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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 self._out_dir = os.path.join(app.cache_dir, 'server')
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46 self._skip_patterns = app.config.get('baker/skip_patterns')
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47 self._force_patterns = app.config.get('baker/force_patterns')
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48 pipeline = ProcessorPipeline(
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49 app, self._out_dir,
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50 skip_patterns=self._skip_patterns,
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51 force_patterns=self._force_patterns)
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52 self._record = pipeline.run()
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53
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54 # Run the WSGI app.
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55 wsgi_wrapper = WsgiServer(self)
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56 run_simple(self.host, self.port, wsgi_wrapper,
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57 use_debugger=True, use_reloader=True)
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58
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59 def _run_request(self, environ, start_response):
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60 try:
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61 return self._run_piecrust(environ, start_response)
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62 except Exception as ex:
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63 if self.debug:
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64 raise
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65 return self._handle_error(ex, environ, start_response)
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66
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67 def _run_piecrust(self, environ, start_response):
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68 request = Request(environ)
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69
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70 # We don't support anything else than GET requests since we're
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71 # previewing something that will be static later.
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72 if self.static_preview and request.method != 'GET':
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73 logger.error("Only GET requests are allowed, got %s" % request.method)
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74 raise MethodNotAllowed()
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75
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76 # Create the app for this request.
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77 app = PieCrust(root_dir=self.root_dir, debug=self.debug)
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78
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79 # We'll serve page assets directly from where they are.
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80 app.env.base_asset_url_format = '/_asset/%path%'
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81
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82 # See if the requested URL is an asset.
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83 response = self._try_serve_asset(app, environ, request)
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84 if response is not None:
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85 return response(environ, start_response)
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86
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87 # It's not an asset we know of... let's see if it can be a page asset.
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88 response = self._try_serve_page_asset(app, environ, request)
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89 if response is not None:
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90 return response(environ, start_response)
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91
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92 # Nope. Let's hope it's an actual page.
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93 try:
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94 response = self._try_serve_page(app, environ, request)
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95 return response(environ, start_response)
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96 except (RouteNotFoundError, SourceNotFoundError) as ex:
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97 logger.exception(ex)
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98 raise NotFound()
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99 except Exception as ex:
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100 logger.exception(ex)
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101 if app.debug:
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102 raise
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103 raise InternalServerError()
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104
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105 def _try_serve_asset(self, app, environ, request):
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106 logger.debug("Searching for asset with path: %s" % request.path)
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107 rel_req_path = request.path.lstrip('/').replace('/', os.sep)
3
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108 entry = self._record.findEntry(rel_req_path)
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109 if entry is None:
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110 return None
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111
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112 # Yep, we know about this URL because we processed an asset that
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113 # maps to it... make sure it's up to date by re-processing it
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114 # before serving.
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115 asset_in_path = os.path.join(app.root_dir, entry.rel_input)
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116 asset_out_path = os.path.join(self._out_dir, rel_req_path)
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117 pipeline = ProcessorPipeline(
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118 app, self._out_dir,
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119 skip_patterns=self._skip_patterns,
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120 force_patterns=self._force_patterns)
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121 pipeline.run(asset_in_path)
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122
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123 logger.debug("Serving %s" % asset_out_path)
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124 wrapper = wrap_file(environ, open(asset_out_path, 'rb'))
3
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125 response = Response(wrapper)
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126 _, ext = os.path.splitext(rel_req_path)
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127 response.mimetype = self._mimetype_map.get(
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128 ext.lstrip('.'), 'text/plain')
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129 return response
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130
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parents:
diff changeset
131 def _try_serve_page_asset(self, app, environ, request):
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diff changeset
132 if not request.path.startswith('/_asset/'):
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parents:
diff changeset
133 return None
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diff changeset
134
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diff changeset
135 full_path = os.path.join(app.root_dir, request.path[len('/_asset/'):])
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diff changeset
136 if not os.path.isfile(full_path):
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parents:
diff changeset
137 return None
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parents:
diff changeset
138
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diff changeset
139 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
140 wrapper = wrap_file(environ, open(full_path, 'rb'))
3
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diff changeset
141 response = Response(wrapper)
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diff changeset
142 _, ext = os.path.splitext(full_path)
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diff changeset
143 response.mimetype = self._mimetype_map.get(
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parents:
diff changeset
144 ext.lstrip('.'), 'text/plain')
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parents:
diff changeset
145 return response
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diff changeset
146
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diff changeset
147 def _try_serve_page(self, app, environ, request):
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diff changeset
148 # Try to find what matches the requested URL.
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diff changeset
149 req_path = request.path
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diff changeset
150 page_num = 1
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diff changeset
151 pgn_suffix_re = app.config.get('__cache/pagination_suffix_re')
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diff changeset
152 pgn_suffix_m = re.search(pgn_suffix_re, request.path)
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diff changeset
153 if pgn_suffix_m:
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diff changeset
154 req_path = request.path[:pgn_suffix_m.start()]
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parents:
diff changeset
155 page_num = int(pgn_suffix_m.group('num'))
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parents:
diff changeset
156
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diff changeset
157 routes = find_routes(app.routes, req_path)
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diff changeset
158 if len(routes) == 0:
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diff changeset
159 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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parents:
diff changeset
160
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diff changeset
161 taxonomy = None
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diff changeset
162 for route, route_metadata in routes:
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diff changeset
163 source = app.getSource(route.source_name)
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parents:
diff changeset
164 if route.taxonomy is None:
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
165 rel_path, fac_metadata = source.findPagePath(
3
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parents:
diff changeset
166 route_metadata, MODE_PARSING)
11
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parents: 7
diff changeset
167 if rel_path is not None:
3
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parents:
diff changeset
168 break
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parents:
diff changeset
169 else:
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diff changeset
170 taxonomy = app.getTaxonomy(route.taxonomy)
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diff changeset
171 term_value = route_metadata.get(taxonomy.term_name)
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parents:
diff changeset
172 if term_value is not None:
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parents:
diff changeset
173 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
174 rel_path = tax_page_ref.rel_path
3
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parents:
diff changeset
175 source = tax_page_ref.source
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parents:
diff changeset
176 fac_metadata = {taxonomy.term_name: term_value}
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parents:
diff changeset
177 break
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parents:
diff changeset
178 else:
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parents:
diff changeset
179 raise SourceNotFoundError("Can't find path for: %s "
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parents:
diff changeset
180 "(looked in: %s)" %
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parents:
diff changeset
181 (req_path, [r.source_name for r, _ in routes]))
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parents:
diff changeset
182
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parents:
diff changeset
183 # 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
184 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
185 page = fac.buildPage()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
186 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
187 if taxonomy is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
188 flt = PaginationFilter()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
189 if taxonomy.is_multiple:
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parents:
diff changeset
190 flt.addClause(HasFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
191 else:
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parents:
diff changeset
192 flt.addClause(IsFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
193 render_ctx.pagination_filter = flt
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parents:
diff changeset
194
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parents:
diff changeset
195 render_ctx.custom_data = {
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
196 taxonomy.term_name: term_value}
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parents:
diff changeset
197 rendered_page = render_page(render_ctx)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
198 rp_content = rendered_page.content
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
199
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
200 if app.debug:
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
201 now_time = time.clock()
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parents: 5
diff changeset
202 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
203 ((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
204 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
205 timing_info)
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
206
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
207 # Start response.
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
208 response = Response()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
209
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
210 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
211 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
212 response.status_code = 304
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
213 return response
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
214
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
215 response.set_etag(etag)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
216 response.content_md5 = etag
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
217
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
218 cache_control = response.cache_control
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
219 if app.debug:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
220 cache_control.no_cache = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
221 cache_control.must_revalidate = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
222 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
223 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
224 app.config.get('site/cache_time'))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
225 if cache_time:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
226 cache_control.public = True
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
227 cache_control.max_age = cache_time
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
228
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
229 content_type = page.config.get('content_type')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
230 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
231 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
232 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
233 mimetype = content_type
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
234 if mimetype:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
235 response.mimetype = mimetype
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
236
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
237 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
238 app.config.get('site/enable_gzip')):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239 try:
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
240 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
241 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
242 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
243 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
244 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
245 response.content_encoding = 'gzip'
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
246 except Exception:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
247 logger.exception("Error compressing response, "
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
248 "falling back to uncompressed.")
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
249 response.set_data(rp_content)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
250
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
251 return response
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 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
254 path = 'error'
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
255 if isinstance(exception, NotFound):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
256 path = '404'
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
257 env = Environment(loader=ErrorMessageLoader())
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
258 template = env.get_template(path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
259 context = {'details': str(exception)}
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
260 response = Response(template.render(context), mimetype='text/html')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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261 return response(environ, start_response)
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262
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263
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264 class WsgiServer(object):
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265 def __init__(self, server):
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266 self.server = server
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267
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268 def __call__(self, environ, start_response):
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269 return self.server._run_request(environ, start_response)
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270
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271
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272 class RouteNotFoundError(Exception):
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273 pass
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274
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275
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276 class SourceNotFoundError(Exception):
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277 pass
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278
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279
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280 content_type_map = {
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281 'html': 'text/html',
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282 'xml': 'text/xml',
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283 'txt': 'text/plain',
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284 'text': 'text/plain',
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285 'css': 'text/css',
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286 'xhtml': 'application/xhtml+xml',
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287 'atom': 'application/atom+xml', # or 'text/xml'?
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288 'rss': 'application/rss+xml', # or 'text/xml'?
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289 'json': 'application/json'}
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290
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291
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292 def find_routes(routes, uri):
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293 uri = uri.lstrip('/')
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294 res = []
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295 for route in routes:
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296 m = route.uri_re.match(uri)
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297 if m:
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298 metadata = m.groupdict()
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299 res.append((route, metadata))
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300 return res
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301
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302
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303 class ErrorMessageLoader(FileSystemLoader):
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304 def __init__(self):
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305 base_dir = os.path.join(os.path.dirname(__file__), 'resources',
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306 'messages')
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307 super(ErrorMessageLoader, self).__init__(base_dir)
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308
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309 def get_source(self, env, template):
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310 template += '.html'
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311 return super(ErrorMessageLoader, self).get_source(env, template)
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312
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313
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314 def load_mimetype_map():
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315 mimetype_map = {}
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316 sep_re = re.compile(r'\s+')
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317 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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318 with open(path, 'r') as f:
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319 for line in f:
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320 tokens = sep_re.split(line)
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321 if len(tokens) > 1:
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322 for t in tokens[1:]:
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323 mimetype_map[t] = tokens[0]
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324 return mimetype_map
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325