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annotate piecrust/serving/util.py @ 556:93b656f0af54

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serve: Improve debug information in the preview server. Now the debug window only loads debug info on demand.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 12 Aug 2015 23:18:35 -0700
parents daf8df5ade7d
children 657384f08ca3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
553
cc6f3dbe3048 serve: Extract some of the server's functionality into WSGI middlewares.
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1 import re
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2 import os.path
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3 import hashlib
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4 import logging
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5 import datetime
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6 from werkzeug.wrappers import Response
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7 from werkzeug.wsgi import wrap_file
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8 from piecrust.app import PieCrust
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9 from piecrust.rendering import QualifiedPage
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10 from piecrust.routing import RouteNotFoundError
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11 from piecrust.sources.base import MODE_PARSING
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12 from piecrust.sources.pageref import PageNotFoundError
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13 from piecrust.uriutil import split_sub_uri
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14
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15
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16 logger = logging.getLogger(__name__)
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17
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18
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19 def get_app_for_server(root_dir, debug=False, sub_cache_dir=None):
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20 app = PieCrust(root_dir=root_dir, debug=debug)
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21 if sub_cache_dir:
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22 app._useSubCacheDir(sub_cache_dir)
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23 app.config.set('site/root', '/')
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24 app.config.set('server/is_serving', True)
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25 return app
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26
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27
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28 class RequestedPage(object):
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29 def __init__(self, qualified_page):
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30 self.qualified_page = qualified_page
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31 self.req_path = None
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32 self.page_num = 1
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33 self.not_found_errors = []
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34
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35
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36 def find_routes(routes, uri):
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37 res = []
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38 tax_res = []
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39 for route in routes:
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40 metadata = route.matchUri(uri)
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41 if metadata is not None:
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42 if route.is_taxonomy_route:
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43 tax_res.append((route, metadata))
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44 else:
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45 res.append((route, metadata))
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46 return res + tax_res
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47
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48
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49 def get_requested_page(app, req_path):
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50 # Try to find what matches the requested URL.
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51 req_path, page_num = split_sub_uri(app, req_path)
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52
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53 routes = find_routes(app.routes, req_path)
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54 if len(routes) == 0:
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55 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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56
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57 qp = None
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58 not_found_errors = []
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59 for route, route_metadata in routes:
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60 try:
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61 qp = _get_requested_page_for_route(
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62 app, route, route_metadata, req_path)
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63 if qp is not None:
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64 break
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65 except PageNotFoundError as nfe:
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66 not_found_errors.append(nfe)
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67
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68 req_page = RequestedPage(qp)
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69 req_page.req_path = req_path
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70 req_page.page_num = page_num
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71 req_page.not_found_errors = not_found_errors
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72 return req_page
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73
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74
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75 def _get_requested_page_for_route(app, route, route_metadata, req_path):
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76 taxonomy = None
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77 source = app.getSource(route.source_name)
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78 if route.taxonomy_name is None:
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79 factory = source.findPageFactory(route_metadata, MODE_PARSING)
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80 if factory is None:
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81 raise PageNotFoundError("No path found for '%s' in source '%s'." %
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82 (req_path, source.name))
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83 else:
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84 taxonomy = app.getTaxonomy(route.taxonomy_name)
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85
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86 # This will raise `PageNotFoundError` naturally if not found.
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87 tax_page_ref = taxonomy.getPageRef(source)
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88 factory = tax_page_ref.getFactory()
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89
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90 # Build the page.
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91 page = factory.buildPage()
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92 qp = QualifiedPage(page, route, route_metadata)
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93 return qp
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94
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95
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96 def load_mimetype_map():
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97 mimetype_map = {}
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98 sep_re = re.compile(r'\s+')
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99 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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100 with open(path, 'r') as f:
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101 for line in f:
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102 tokens = sep_re.split(line)
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103 if len(tokens) > 1:
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104 for t in tokens[1:]:
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105 mimetype_map[t] = tokens[0]
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106 return mimetype_map
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107
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108
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109 def make_wrapped_file_response(environ, request, path):
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110 logger.debug("Serving %s" % path)
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111
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112 # Check if we can return a 304 status code.
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113 mtime = os.path.getmtime(path)
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114 etag_str = '%s$$%s' % (path, mtime)
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115 etag = hashlib.md5(etag_str.encode('utf8')).hexdigest()
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116 if etag in request.if_none_match:
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117 response = Response()
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118 response.status_code = 304
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119 return response
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120
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121 wrapper = wrap_file(environ, open(path, 'rb'))
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122 response = Response(wrapper)
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123 _, ext = os.path.splitext(path)
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124 response.set_etag(etag)
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125 response.last_modified = datetime.datetime.fromtimestamp(mtime)
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126 response.mimetype = mimetype_map.get(
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127 ext.lstrip('.'), 'text/plain')
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128 response.direct_passthrough = True
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129 return response
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130
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131
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132 mimetype_map = load_mimetype_map()
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133 content_type_map = {
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134 'html': 'text/html',
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135 'xml': 'text/xml',
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136 'txt': 'text/plain',
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137 'text': 'text/plain',
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138 'css': 'text/css',
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139 'xhtml': 'application/xhtml+xml',
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140 'atom': 'application/atom+xml', # or 'text/xml'?
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141 'rss': 'application/rss+xml', # or 'text/xml'?
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142 'json': 'application/json'}
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143