Mercurial > piecrust2

annotate piecrust/routing.py @ 990:22cf13b86cc3

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cm: Upgrade Garcon tasks to the latest PyInvoke version.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 19 Nov 2017 14:29:52 -0800
parents 45ad976712ec
children 1ce67d2fae0a
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1 import re
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2 import os.path
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3 import copy
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4 import logging
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5 import urllib.parse
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6 from werkzeug.utils import cached_property
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9 logger = logging.getLogger(__name__)
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12 route_re = re.compile(r'%((?P<qual>[\w\d]+):)?(?P<var>\+)?(?P<name>\w+)%')
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13 route_esc_re = re.compile(
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14 r'\\%((?P<qual>[\w\d]+)\\:)?(?P<var>\\\+)?(?P<name>\w+)\\%')
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15 ugly_url_cleaner = re.compile(r'\.html$')
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18 class RouteNotFoundError(Exception):
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19 pass
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22 class InvalidRouteError(Exception):
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23 pass
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25
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26 class RouteParameter(object):
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27 TYPE_STRING = 0
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28 TYPE_PATH = 1
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29 TYPE_INT2 = 2
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30 TYPE_INT4 = 3
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32 def __init__(self, param_name, param_type=TYPE_STRING, *, variadic=False):
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33 self.param_name = param_name
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34 self.param_type = param_type
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35 self.variadic = variadic
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37
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38 class Route(object):
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39 """ Information about a route for a PieCrust application.
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40 Each route defines the "shape" of an URL and how it maps to
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41 content sources.
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42 """
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43 def __init__(self, app, cfg):
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44 self.app = app
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45 self.config = copy.deepcopy(cfg)
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46
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47 self.source_name = cfg['source']
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48 self.uri_pattern = cfg['url'].lstrip('/')
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49 self.pass_num = cfg.get('pass', 1)
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50
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51 self.supported_params = self.source.getSupportedRouteParameters()
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52
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53 self.pretty_urls = app.config.get('site/pretty_urls')
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54 self.trailing_slash = app.config.get('site/trailing_slash')
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55 self.show_debug_info = app.config.get('site/show_debug_info')
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56 self.pagination_suffix_format = app.config.get(
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57 '__cache/pagination_suffix_format')
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58 self.uri_root = app.config.get('site/root')
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59
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60 self.uri_params = []
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61 self.uri_format = route_re.sub(self._uriFormatRepl, self.uri_pattern)
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62
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63 # Get the straight-forward regex for matching this URI pattern.
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64 p = route_esc_re.sub(self._uriPatternRepl,
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65 re.escape(self.uri_pattern)) + '$'
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66 self.uri_re = re.compile(p)
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68 # If the URI pattern has a 'path'-type component, we'll need to match
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69 # the versions for which that component is empty. So for instance if
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70 # we have `/foo/%path:bar%`, we may need to match `/foo` (note the
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71 # lack of a trailing slash). We have to build a special pattern (in
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72 # this case without that trailing slash) to match those situations.
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73 # (maybe there's a better way to do it but I can't think of any
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74 # right now)
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75 uri_pattern_no_path = (
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76 route_re.sub(self._uriNoPathRepl, self.uri_pattern)
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77 .replace('//', '/')
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78 .rstrip('/'))
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79 if uri_pattern_no_path != self.uri_pattern:
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80 p = route_esc_re.sub(self._uriPatternRepl,
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81 re.escape(uri_pattern_no_path)) + '$'
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82 self.uri_re_no_path = re.compile(p)
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83 else:
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84 self.uri_re_no_path = None
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85
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86 self.func_name = self._validateFuncName(cfg.get('func'))
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87 self.func_has_variadic_parameter = False
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88 for p in self.uri_params[:-1]:
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89 param = self.getParameter(p)
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90 if param.variadic:
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91 raise Exception(
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92 "Only the last route URL parameter can be variadic. "
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93 "Got: %s" % self.uri_pattern)
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94 if len(self.uri_params) > 0:
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95 last_param = self.getParameter(self.uri_params[-1])
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96 self.func_has_variadic_parameter = last_param.variadic
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97
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98 @cached_property
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99 def source(self):
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100 for src in self.app.sources:
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101 if src.name == self.source_name:
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102 return src
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103 raise Exception(
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104 "Can't find source '%s' for route '%s'." % (
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105 self.source_name, self.uri_pattern))
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106
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107 def hasParameter(self, name):
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108 return any(lambda p: p.param_name == name, self.supported_params)
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109
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110 def getParameter(self, name):
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111 for p in self.supported_params:
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112 if p.param_name == name:
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113 return p
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114 raise Exception("No such supported route parameter '%s' in: %s" %
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115 (name, self.uri_pattern))
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116
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117 def getParameterType(self, name):
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118 return self.getParameter(name).param_type
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119
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120 def matchesParameters(self, route_params):
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121 return set(self.uri_params).issubset(route_params.keys())
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122
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123 def matchUri(self, uri, strict=False):
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124 if not uri.startswith(self.uri_root):
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125 raise Exception("The given URI is not absolute: %s" % uri)
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126 uri = uri[len(self.uri_root):]
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diff changeset
127
256
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diff changeset
128 if not self.pretty_urls:
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diff changeset
129 uri = ugly_url_cleaner.sub('', uri)
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130 elif self.trailing_slash:
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diff changeset
131 uri = uri.rstrip('/')
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diff changeset
132
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133 route_params = None
173
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diff changeset
134 m = self.uri_re.match(uri)
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parents: 154
diff changeset
135 if m:
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diff changeset
136 route_params = m.groupdict()
173
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parents: 154
diff changeset
137 if self.uri_re_no_path:
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diff changeset
138 m = self.uri_re_no_path.match(uri)
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diff changeset
139 if m:
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diff changeset
140 route_params = m.groupdict()
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141 if route_params is None:
380
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diff changeset
142 return None
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diff changeset
143
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parents: 369
diff changeset
144 if not strict:
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diff changeset
145 # When matching URIs, if the URI is a match but is missing some
852
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146 # parameters, fill those up with empty strings. This can happen if,
380
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parents: 369
diff changeset
147 # say, a route's pattern is `/foo/%slug%`, and we're matching an
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diff changeset
148 # URL like `/foo`.
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diff changeset
149 matched_keys = set(route_params.keys())
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diff changeset
150 missing_keys = set(self.uri_params) - matched_keys
380
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diff changeset
151 for k in missing_keys:
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diff changeset
152 if self.getParameterType(k) != RouteParameter.TYPE_PATH:
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153 return None
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154 route_params[k] = ''
380
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diff changeset
155
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diff changeset
156 for k in route_params:
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157 route_params[k] = self._coerceRouteParameter(
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diff changeset
158 k, route_params[k])
448
a17774094db8 serve: Fix bug with creating routing metadata from the URL.
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parents: 438
diff changeset
159
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160 return route_params
3
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161
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diff changeset
162 def getUri(self, route_params, *, sub_num=1):
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diff changeset
163 route_params = dict(route_params)
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diff changeset
164 for k in route_params:
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diff changeset
165 route_params[k] = self._coerceRouteParameter(
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diff changeset
166 k, route_params[k])
723
606f6d57b5df routing: Cleanup URL routing and improve page matching.
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diff changeset
167
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diff changeset
168 uri = self.uri_format % route_params
256
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diff changeset
169 suffix = None
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diff changeset
170 if sub_num > 1:
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diff changeset
171 # Note that we know the pagination suffix starts with a slash.
262
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diff changeset
172 suffix = self.pagination_suffix_format % {'num': sub_num}
256
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diff changeset
173
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diff changeset
174 if self.pretty_urls:
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diff changeset
175 # Output will be:
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diff changeset
176 # - `subdir/name`
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diff changeset
177 # - `subdir/name/2`
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178 # - `subdir/name.ext`
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diff changeset
179 # - `subdir/name.ext/2`
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diff changeset
180 if suffix:
262
61145dcd56e0 routing: Better generate URLs according to the site configuration.
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diff changeset
181 if uri == '':
61145dcd56e0 routing: Better generate URLs according to the site configuration.
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diff changeset
182 uri = suffix.lstrip('/')
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diff changeset
183 else:
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diff changeset
184 uri = uri.rstrip('/') + suffix
337
49408002798e internal: Fix stupid routing bug.
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diff changeset
185 if self.trailing_slash and uri != '':
256
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diff changeset
186 uri = uri.rstrip('/') + '/'
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diff changeset
187 else:
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diff changeset
188 # Output will be:
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diff changeset
189 # - `subdir/name.html`
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diff changeset
190 # - `subdir/name/2.html`
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diff changeset
191 # - `subdir/name.ext`
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diff changeset
192 # - `subdir/name/2.ext`
262
61145dcd56e0 routing: Better generate URLs according to the site configuration.
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diff changeset
193 if uri == '':
61145dcd56e0 routing: Better generate URLs according to the site configuration.
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diff changeset
194 if suffix:
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diff changeset
195 uri = suffix.lstrip('/') + '.html'
256
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diff changeset
196 else:
262
61145dcd56e0 routing: Better generate URLs according to the site configuration.
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diff changeset
197 base_uri, ext = os.path.splitext(uri)
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diff changeset
198 if not ext:
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diff changeset
199 ext = '.html'
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diff changeset
200 if suffix:
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diff changeset
201 uri = base_uri + suffix + ext
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diff changeset
202 else:
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diff changeset
203 uri = base_uri + ext
256
da5e6e00fb41 bake/serve: Make previewed and baked URLs consistent.
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diff changeset
204
568
6b6c5442c790 bug: Correctly handle root URLs with special characters.
Ludovic Chabant <ludovic@chabant.com>
parents: 561
diff changeset
205 uri = self.uri_root + urllib.parse.quote(uri)
396
dc0988d937b3 serve: Fix bug where `?!debug` doesn't get appending correctly.
Ludovic Chabant <ludovic@chabant.com>
parents: 380
diff changeset
206
dc0988d937b3 serve: Fix bug where `?!debug` doesn't get appending correctly.
Ludovic Chabant <ludovic@chabant.com>
parents: 380
diff changeset
207 if self.show_debug_info:
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parents: 380
diff changeset
208 uri += '?!debug'
dc0988d937b3 serve: Fix bug where `?!debug` doesn't get appending correctly.
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parents: 380
diff changeset
209
235
55087da9a72e bake: Don't include the site root when building output paths.
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parents: 225
diff changeset
210 return uri
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
211
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
212 def execTemplateFunc(self, *args):
792
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
213 fixed_param_count = len(self.uri_params)
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
214 if self.func_has_variadic_parameter:
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
215 fixed_param_count -= 1
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
216
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
217 if len(args) < fixed_param_count:
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
218 raise Exception(
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
219 "Route function '%s' expected %d arguments, "
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diff changeset
220 "got %d: %s" %
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
221 (self.func_name, fixed_param_count, len(args), args))
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
222
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
223 if self.func_has_variadic_parameter:
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parents: 734
diff changeset
224 coerced_args = list(args[:fixed_param_count])
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
225 if len(args) > fixed_param_count:
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
Ludovic Chabant <ludovic@chabant.com>
parents: 734
diff changeset
226 var_arg = tuple(args[fixed_param_count:])
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parents: 734
diff changeset
227 coerced_args.append(var_arg)
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
228 else:
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diff changeset
229 coerced_args = args
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
230
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
231 route_params = {}
792
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
232 for arg_name, arg_val in zip(self.uri_params, coerced_args):
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
233 route_params[arg_name] = self._coerceRouteParameter(
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents: 792
diff changeset
234 arg_name, arg_val)
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
235
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 852
diff changeset
236 self.source.onRouteFunctionUsed(route_params)
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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parents: 734
diff changeset
237
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
238 return self.getUri(route_params)
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
239
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
240 def _uriFormatRepl(self, m):
792
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
241 if m.group('qual') or m.group('var'):
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
242 # Print a warning only if we're not in a worker process.
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
243 print_warning = not self.app.config.has('baker/worker_id')
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parents: 791
diff changeset
244 if print_warning:
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
245 logger.warning("Route '%s' specified parameter types -- "
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
246 "they're not needed anymore." %
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
247 self.uri_pattern)
790
4cbe057a8b6a routing: Add some backwards compatibility support for parameter types.
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parents: 787
diff changeset
248
792
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
249 name = m.group('name')
58ebf50235a5 routing: Simplify how routes are defined.
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parents: 791
diff changeset
250 self.uri_params.append(name)
58ebf50235a5 routing: Simplify how routes are defined.
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251 try:
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252 param_type = self.getParameterType(name)
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253 if param_type == RouteParameter.TYPE_INT4:
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254 return '%%(%s)04d' % name
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255 elif param_type == RouteParameter.TYPE_INT2:
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256 return '%%(%s)02d' % name
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257 return '%%(%s)s' % name
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258 except:
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259 known = [p.name for p in self.supported_params]
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260 raise Exception("Unknown route parameter '%s' for route '%s'. "
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261 "Must be one of: %s'" %
58ebf50235a5 routing: Simplify how routes are defined.
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262 (name, self.uri_pattern, known))
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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263
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264 def _uriPatternRepl(self, m):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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265 name = m.group('name')
792
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266 param_type = self.getParameterType(name)
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267 if param_type == RouteParameter.TYPE_PATH:
173
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268 return r'(?P<%s>[^\?]*)' % name
792
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269 elif param_type == RouteParameter.TYPE_INT4:
723
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270 return r'(?P<%s>\d{4})' % name
792
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271 elif param_type == RouteParameter.TYPE_INT2:
723
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272 return r'(?P<%s>\d{2})' % name
173
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diff changeset
273 return r'(?P<%s>[^/\?]+)' % name
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diff changeset
274
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diff changeset
275 def _uriNoPathRepl(self, m):
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diff changeset
276 name = m.group('name')
792
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277 param_type = self.getParameterType(name)
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278 if param_type == RouteParameter.TYPE_PATH:
173
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diff changeset
279 return ''
3
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280 return r'(?P<%s>[^/\?]+)' % name
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281
723
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282 def _coerceRouteParameter(self, name, val):
792
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
283 try:
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diff changeset
284 param_type = self.getParameterType(name)
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diff changeset
285 except:
58ebf50235a5 routing: Simplify how routes are defined.
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286 # Unknown parameter... just leave it.
723
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diff changeset
287 return val
792
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diff changeset
288
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
289 if param_type in [RouteParameter.TYPE_INT2, RouteParameter.TYPE_INT4]:
723
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diff changeset
290 try:
606f6d57b5df routing: Cleanup URL routing and improve page matching.
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diff changeset
291 return int(val)
606f6d57b5df routing: Cleanup URL routing and improve page matching.
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diff changeset
292 except ValueError:
606f6d57b5df routing: Cleanup URL routing and improve page matching.
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diff changeset
293 raise Exception(
792
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
294 "Expected route parameter '%s' to be an integer, "
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
295 "but was: %s" % (name, param_type, val))
58ebf50235a5 routing: Simplify how routes are defined.
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diff changeset
296 return val
790
4cbe057a8b6a routing: Add some backwards compatibility support for parameter types.
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diff changeset
297
787
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
298 def _validateFuncName(self, name):
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
299 if not name:
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
300 return None
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
301 i = name.find('(')
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
302 if i >= 0:
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
303 name = name[:i]
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
304 logger.warning(
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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diff changeset
305 "Route function names shouldn't contain the list of arguments "
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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parents: 734
diff changeset
306 "anymore -- just specify '%s'." % name)
f6f9a284a5f3 routing: Simplify how route functions are declared and handled.
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parents: 734
diff changeset
307 return name
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
308
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
309
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
310 class RouteFunction:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
311 def __init__(self, route):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
312 self._route = route
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
313
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
314 def __call__(self, *args, **kwargs):
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 792
diff changeset
315 return self._route.execTemplateFunc(*args, **kwargs)
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 852
diff changeset
316
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 852
diff changeset
317 def _isCompatibleRoute(self, route):
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
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parents: 852
diff changeset
318 return self._route.uri_pattern == route.uri_pattern