Mercurial > piecrust2

annotate piecrust/serving/util.py @ 1134:986ecdaa2a36

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url: New `url` command to get the URL of a page from its path.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 23 Apr 2018 21:37:27 -0700
parents c8518f5cedbb
children e94737572542
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
553
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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.page import PageNotFoundError
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9 from piecrust.routing import RouteNotFoundError
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10 from piecrust.uriutil import split_sub_uri
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11
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12
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13 logger = logging.getLogger(__name__)
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14
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15
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16 def get_app_for_server(appfactory, root_url='/'):
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17 app = appfactory.create()
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18 app.config.set('site/root', root_url)
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19 app.config.set('server/is_serving', True)
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20 # We'll serve page assets directly from where they are.
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21 app.config.set('site/asset_url_format', root_url + '_asset/%path%')
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22 return app
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23
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24
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25 class RequestedPage(object):
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26 def __init__(self):
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27 self.page = None
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28 self.sub_num = 1
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29 self.req_path = None
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30 self.not_found_errors = []
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31
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32
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33 def find_routes(routes, uri, decomposed_uri=None):
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34 """ Returns routes matching the given URL.
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35 """
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36 sub_num = 0
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37 uri_no_sub = None
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38 if decomposed_uri is not None:
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39 uri_no_sub, sub_num = decomposed_uri
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40
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41 res = []
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42 for route in routes:
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43 route_params = route.matchUri(uri)
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44 if route_params is not None:
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45 res.append((route, route_params, 1))
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46
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47 if sub_num > 1:
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48 route_params = route.matchUri(uri_no_sub)
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49 if route_params is not None:
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50 res.append((route, route_params, sub_num))
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51 return res
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52
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53
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54 def get_requested_page(app, req_path):
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55 # Remove the trailing slash to simplify how we parse URLs.
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56 root_url = app.config.get('site/root')
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57 if req_path != root_url:
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58 req_path = req_path.rstrip('/')
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59
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60 # Try to find what matches the requested URL.
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61 # It could also be a sub-page (i.e. the URL ends with a page number), so
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62 # we try to also match the base URL (without the number).
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63 req_path_no_sub, sub_num = split_sub_uri(app, req_path)
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64 routes = find_routes(app.routes, req_path, (req_path_no_sub, sub_num))
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65 if len(routes) == 0:
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66 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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67
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68 req_page = RequestedPage()
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69 for route, route_params, route_sub_num in routes:
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70 cur_req_path = req_path
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71 if route_sub_num > 1:
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72 cur_req_path = req_path_no_sub
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73
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74 page = _get_requested_page_for_route(app, route, route_params)
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75 if page is not None:
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76 req_page.page = page
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77 req_page.sub_num = route_sub_num
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78 req_page.req_path = cur_req_path
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79 break
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80
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81 req_page.not_found_errors.append(PageNotFoundError(
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82 "No path found for '%s' in source '%s'." %
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83 (cur_req_path, route.source_name)))
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84
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85 return req_page
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86
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87
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88 def _get_requested_page_for_route(app, route, route_params):
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89 source = app.getSource(route.source_name)
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90 item = source.findContentFromRoute(route_params)
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91 if item is not None:
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92 return app.getPage(source, item)
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93 return None
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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 # Check if we can return a 304 status code.
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111 mtime = os.path.getmtime(path)
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112 etag_str = '%s$$%s' % (path, mtime)
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113 etag = hashlib.md5(etag_str.encode('utf8')).hexdigest()
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114 if etag in request.if_none_match:
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115 logger.debug("Serving %s [no download, E-Tag matches]" % path)
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116 response = Response()
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117 response.status_code = 304
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118 return response
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119
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120 logger.debug("Serving %s [full download]" % path)
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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