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annotate piecrust/serving/util.py @ 853:f070a4fc033c

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core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 21 May 2017 00:06:59 -0700
parents 4850f8c21b6e
children 08e02c2a2a1a
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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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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 return app
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23 class RequestedPage(object):
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24 def __init__(self):
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25 self.page = None
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26 self.sub_num = 1
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27 self.req_path = None
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28 self.not_found_errors = []
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31 def find_routes(routes, uri, sub_num=1):
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32 """ Returns routes matching the given URL.
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33 """
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34 res = []
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35 for route in routes:
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36 route_params = route.matchUri(uri)
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37 if route_params is not None:
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38 res.append((route, route_params, sub_num))
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39 return res
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41
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42 def get_requested_page(app, req_path):
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43 # Remove the trailing slash to simplify how we parse URLs.
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44 root_url = app.config.get('site/root')
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45 if req_path != root_url:
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46 req_path = req_path.rstrip('/')
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47
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48 # Try to find what matches the requested URL.
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49 routes = find_routes(app.routes, req_path)
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50
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51 # It could also be a sub-page (i.e. the URL ends with a page number), so
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52 # we try to also match the base URL (without the number).
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53 req_path_no_num, page_num = split_sub_uri(app, req_path)
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54 if page_num > 1:
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55 routes += find_routes(app.routes, req_path_no_num, page_num)
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56
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57 if len(routes) == 0:
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58 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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59
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60 req_page = RequestedPage()
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61 for route, route_params, route_sub_num in routes:
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62 cur_req_path = req_path
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63 if route_sub_num > 1:
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64 cur_req_path = req_path_no_num
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65
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66 page = _get_requested_page_for_route(app, route, route_params,
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67 route_sub_num)
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68 if page is not None:
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69 req_page.page = page
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70 req_page.sub_num = route_sub_num
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71 req_page.req_path = cur_req_path
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72 break
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73
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74 req_page.not_found_errors.append(PageNotFoundError(
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75 "No path found for '%s' in source '%s'." %
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76 (cur_req_path, route.source_name)))
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77
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78 return req_page
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79
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80
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81 def _get_requested_page_for_route(app, route, route_params):
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82 source = app.getSource(route.source_name)
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83 item = source.findContent(route_params)
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84 if item is not None:
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85 return app.getPage(item)
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86 return None
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87
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88
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89 def load_mimetype_map():
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90 mimetype_map = {}
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91 sep_re = re.compile(r'\s+')
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92 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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93 with open(path, 'r') as f:
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94 for line in f:
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95 tokens = sep_re.split(line)
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96 if len(tokens) > 1:
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97 for t in tokens[1:]:
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98 mimetype_map[t] = tokens[0]
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99 return mimetype_map
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100
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101
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102 def make_wrapped_file_response(environ, request, path):
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103 logger.debug("Serving %s" % path)
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104
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105 # Check if we can return a 304 status code.
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106 mtime = os.path.getmtime(path)
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107 etag_str = '%s$$%s' % (path, mtime)
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108 etag = hashlib.md5(etag_str.encode('utf8')).hexdigest()
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109 if etag in request.if_none_match:
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110 response = Response()
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111 response.status_code = 304
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112 return response
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113
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114 wrapper = wrap_file(environ, open(path, 'rb'))
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115 response = Response(wrapper)
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116 _, ext = os.path.splitext(path)
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117 response.set_etag(etag)
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118 response.last_modified = datetime.datetime.fromtimestamp(mtime)
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119 response.mimetype = mimetype_map.get(
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120 ext.lstrip('.'), 'text/plain')
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121 response.direct_passthrough = True
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122 return response
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123
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124
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125 mimetype_map = load_mimetype_map()
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126 content_type_map = {
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127 'html': 'text/html',
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128 'xml': 'text/xml',
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129 'txt': 'text/plain',
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130 'text': 'text/plain',
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131 'css': 'text/css',
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132 'xhtml': 'application/xhtml+xml',
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133 'atom': 'application/atom+xml', # or 'text/xml'?
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134 'rss': 'application/rss+xml', # or 'text/xml'?
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135 'json': 'application/json'}
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136