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annotate piecrust/serving/util.py @ 852:4850f8c21b6e

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core: Start of the big refactor for PieCrust 3.0. * Everything is a `ContentSource`, including assets directories. * Most content sources are subclasses of the base file-system source. * A source is processed by a "pipeline", and there are 2 built-in pipelines, one for assets and one for pages. The asset pipeline is vaguely functional, but the page pipeline is completely broken right now. * Rewrite the baking process as just running appropriate pipelines on each content item. This should allow for better parallelization.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 17 May 2017 00:11:48 -0700
parents 673979a5d548
children f070a4fc033c
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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 QualifiedPage, 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.qualified_page = None
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26 self.req_path = None
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27 self.not_found_errors = []
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29
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30 def find_routes(routes, uri, sub_num=1):
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31 """ Returns routes matching the given URL.
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32 """
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33 res = []
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34 for route in routes:
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35 route_params = route.matchUri(uri)
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36 if route_params is not None:
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37 res.append((route, route_params, sub_num))
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38 return res
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40
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41 def get_requested_page(app, req_path):
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42 # Remove the trailing slash to simplify how we parse URLs.
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43 root_url = app.config.get('site/root')
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44 if req_path != root_url:
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45 req_path = req_path.rstrip('/')
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46
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47 # Try to find what matches the requested URL.
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48 routes = find_routes(app.routes, req_path)
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49
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50 # It could also be a sub-page (i.e. the URL ends with a page number), so
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51 # we try to also match the base URL (without the number).
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52 req_path_no_num, page_num = split_sub_uri(app, req_path)
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53 if page_num > 1:
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54 routes += find_routes(app.routes, req_path_no_num, page_num)
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55
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56 if len(routes) == 0:
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57 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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58
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59 req_page = RequestedPage()
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60 for route, route_params, route_sub_num in routes:
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61 cur_req_path = req_path
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62 if route_sub_num > 1:
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63 cur_req_path = req_path_no_num
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64
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65 qp = _get_requested_page_for_route(app, route, route_params,
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66 route_sub_num)
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67 if qp is not None:
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68 req_page.qualified_page = qp
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69 req_page.req_path = cur_req_path
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70 break
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71
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72 req_page.not_found_errors.append(PageNotFoundError(
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73 "No path found for '%s' in source '%s'." %
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74 (cur_req_path, route.source_name)))
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75
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76 return req_page
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77
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78
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79 def _get_requested_page_for_route(app, route, route_params, sub_num):
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80 source = app.getSource(route.source_name)
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81 item = source.findContent(route_params)
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82 if item is None:
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83 return None
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84
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85 # Build the page.
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86 page = app.getPage(item)
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87 qp = QualifiedPage(page, route, route_params, sub_num)
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88 return qp
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89
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90
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91 def load_mimetype_map():
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92 mimetype_map = {}
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93 sep_re = re.compile(r'\s+')
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94 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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95 with open(path, 'r') as f:
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96 for line in f:
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97 tokens = sep_re.split(line)
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98 if len(tokens) > 1:
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99 for t in tokens[1:]:
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100 mimetype_map[t] = tokens[0]
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101 return mimetype_map
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102
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103
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104 def make_wrapped_file_response(environ, request, path):
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105 logger.debug("Serving %s" % path)
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106
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107 # Check if we can return a 304 status code.
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108 mtime = os.path.getmtime(path)
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109 etag_str = '%s$$%s' % (path, mtime)
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110 etag = hashlib.md5(etag_str.encode('utf8')).hexdigest()
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111 if etag in request.if_none_match:
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112 response = Response()
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113 response.status_code = 304
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114 return response
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115
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116 wrapper = wrap_file(environ, open(path, 'rb'))
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117 response = Response(wrapper)
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118 _, ext = os.path.splitext(path)
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119 response.set_etag(etag)
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120 response.last_modified = datetime.datetime.fromtimestamp(mtime)
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121 response.mimetype = mimetype_map.get(
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122 ext.lstrip('.'), 'text/plain')
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123 response.direct_passthrough = True
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124 return response
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125
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126
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127 mimetype_map = load_mimetype_map()
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128 content_type_map = {
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129 'html': 'text/html',
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130 'xml': 'text/xml',
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131 'txt': 'text/plain',
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132 'text': 'text/plain',
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133 'css': 'text/css',
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134 'xhtml': 'application/xhtml+xml',
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135 'atom': 'application/atom+xml', # or 'text/xml'?
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136 'rss': 'application/rss+xml', # or 'text/xml'?
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137 'json': 'application/json'}
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138