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annotate piecrust/routing.py @ 483:64e1cd71b30b

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serve: Try to serve taxonomy pages after all normal pages have failed.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 21 Jul 2015 22:42:47 -0700
parents cce911be024d
children 16e705c58cae
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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7 logger = logging.getLogger(__name__)
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10 route_re = re.compile(r'%((?P<qual>path):)?(?P<name>\w+)%')
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11 route_esc_re = re.compile(r'\\%((?P<qual>path)\\:)?(?P<name>\w+)\\%')
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12 template_func_re = re.compile(r'^(?P<name>\w+)\((?P<first_arg>\w+)'
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13 r'(?P<other_args>.*)\)\s*$')
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14 template_func_arg_re = re.compile(r',\s*(?P<arg>\w+)')
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15 ugly_url_cleaner = re.compile(r'\.html$')
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17
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18 def create_route_metadata(page):
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19 route_metadata = copy.deepcopy(page.source_metadata)
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20 route_metadata.update(page.getRouteMetadata())
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22 # TODO: fix this hard-coded shit
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23 for key in ['year', 'month', 'day']:
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24 if key in route_metadata and isinstance(route_metadata[key], str):
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25 route_metadata[key] = int(route_metadata[key])
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27 return route_metadata
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29
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30 class IRouteMetadataProvider(object):
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31 def getRouteMetadata(self):
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32 raise NotImplementedError()
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34
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35 class Route(object):
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36 """ Information about a route for a PieCrust application.
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37 Each route defines the "shape" of an URL and how it maps to
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38 sources and taxonomies.
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39 """
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40 def __init__(self, app, cfg):
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41 self.app = app
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42
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43 self.source_name = cfg['source']
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44 self.taxonomy_name = cfg.get('taxonomy')
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45
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46 self.pretty_urls = app.config.get('site/pretty_urls')
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47 self.trailing_slash = app.config.get('site/trailing_slash')
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48 self.show_debug_info = app.config.get('site/show_debug_info')
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49 self.pagination_suffix_format = app.config.get(
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50 '__cache/pagination_suffix_format')
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51 self.uri_root = app.config.get('site/root')
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52
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53 uri = cfg['url']
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54 self.uri_pattern = uri.lstrip('/')
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55 self.uri_format = route_re.sub(self._uriFormatRepl, self.uri_pattern)
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56
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57 # Get the straight-forward regex for matching this URI pattern.
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58 p = route_esc_re.sub(self._uriPatternRepl,
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59 re.escape(self.uri_pattern)) + '$'
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60 self.uri_re = re.compile(p)
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62 # If the URI pattern has a 'path'-type component, we'll need to match
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63 # the versions for which that component is empty. So for instance if
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64 # we have `/foo/%path:bar%`, we may need to match `/foo` (note the
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65 # lack of a trailing slash). We have to build a special pattern (in
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66 # this case without that trailing slash) to match those situations.
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67 # (maybe there's a better way to do it but I can't think of any
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68 # right now)
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69 uri_pattern_no_path = (
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70 route_re.sub(self._uriNoPathRepl, self.uri_pattern)
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71 .replace('//', '/')
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72 .rstrip('/'))
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73 if uri_pattern_no_path != self.uri_pattern:
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74 p = route_esc_re.sub(self._uriPatternRepl,
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75 re.escape(uri_pattern_no_path)) + '$'
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76 self.uri_re_no_path = re.compile(p)
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77 else:
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78 self.uri_re_no_path = None
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79
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80 self.required_route_metadata = set()
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81 for m in route_re.finditer(self.uri_pattern):
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82 self.required_route_metadata.add(m.group('name'))
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83
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84 self.template_func = None
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85 self.template_func_name = None
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86 self.template_func_args = []
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87 self._createTemplateFunc(cfg.get('func'))
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88
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89 @property
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90 def is_taxonomy_route(self):
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91 return self.taxonomy_name is not None
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92
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93 @property
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94 def source(self):
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95 for src in self.app.sources:
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96 if src.name == self.source_name:
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97 return src
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98 raise Exception("Can't find source '%s' for route '%'." % (
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99 self.source_name, self.uri))
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100
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101 @property
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102 def source_realm(self):
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103 return self.source.realm
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104
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105 def matchesMetadata(self, route_metadata):
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106 return self.required_route_metadata.issubset(route_metadata.keys())
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107
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108 def matchUri(self, uri, strict=False):
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109 if not uri.startswith(self.uri_root):
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110 raise Exception("The given URI is not absolute: %s" % uri)
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111 uri = uri[len(self.uri_root):]
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112
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113 if not self.pretty_urls:
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114 uri = ugly_url_cleaner.sub('', uri)
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115 elif self.trailing_slash:
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116 uri = uri.rstrip('/')
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117
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118 route_metadata = None
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119 m = self.uri_re.match(uri)
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120 if m:
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121 route_metadata = m.groupdict()
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122 if self.uri_re_no_path:
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123 m = self.uri_re_no_path.match(uri)
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124 if m:
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125 route_metadata = m.groupdict()
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diff changeset
126 if route_metadata is None:
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diff changeset
127 return None
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parents: 369
diff changeset
128
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diff changeset
129 if not strict:
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130 # When matching URIs, if the URI is a match but is missing some
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131 # metadata, fill those up with empty strings. This can happen if,
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132 # say, a route's pattern is `/foo/%slug%`, and we're matching an
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diff changeset
133 # URL like `/foo`.
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diff changeset
134 matched_keys = set(route_metadata.keys())
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135 missing_keys = self.required_route_metadata - matched_keys
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diff changeset
136 for k in missing_keys:
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diff changeset
137 route_metadata[k] = ''
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diff changeset
138
448
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diff changeset
139 # TODO: fix this hard-coded shit
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140 for key in ['year', 'month', 'day']:
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141 if key in route_metadata and isinstance(route_metadata[key], str):
482
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parents: 448
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142 try:
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143 route_metadata[key] = int(route_metadata[key])
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diff changeset
144 except ValueError:
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diff changeset
145 pass
448
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diff changeset
146
380
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147 return route_metadata
3
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148
430
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diff changeset
149 def getUri(self, route_metadata, *, sub_num=1):
369
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150 uri = self.uri_format % route_metadata
256
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151 suffix = None
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152 if sub_num > 1:
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153 # Note that we know the pagination suffix starts with a slash.
262
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154 suffix = self.pagination_suffix_format % {'num': sub_num}
256
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155
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156 if self.pretty_urls:
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157 # Output will be:
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158 # - `subdir/name`
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159 # - `subdir/name/2`
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160 # - `subdir/name.ext`
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161 # - `subdir/name.ext/2`
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162 if suffix:
262
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163 if uri == '':
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164 uri = suffix.lstrip('/')
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165 else:
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166 uri = uri.rstrip('/') + suffix
337
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diff changeset
167 if self.trailing_slash and uri != '':
256
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168 uri = uri.rstrip('/') + '/'
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169 else:
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170 # Output will be:
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171 # - `subdir/name.html`
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diff changeset
172 # - `subdir/name/2.html`
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173 # - `subdir/name.ext`
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174 # - `subdir/name/2.ext`
262
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diff changeset
175 if uri == '':
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diff changeset
176 if suffix:
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177 uri = suffix.lstrip('/') + '.html'
256
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178 else:
262
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diff changeset
179 base_uri, ext = os.path.splitext(uri)
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180 if not ext:
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181 ext = '.html'
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182 if suffix:
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183 uri = base_uri + suffix + ext
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184 else:
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185 uri = base_uri + ext
256
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diff changeset
186
329
422052d2e978 internal: Try handling URLs in a consistent way.
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diff changeset
187 uri = self.uri_root + uri
396
dc0988d937b3 serve: Fix bug where `?!debug` doesn't get appending correctly.
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diff changeset
188
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diff changeset
189 if self.show_debug_info:
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190 uri += '?!debug'
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diff changeset
191
235
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parents: 225
diff changeset
192 return uri
3
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193
334
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diff changeset
194 def slugifyTaxonomyTerm(self, term):
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195 #TODO: add options for transliterating and combining terms.
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diff changeset
196 if isinstance(term, tuple):
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diff changeset
197 return '/'.join(term)
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diff changeset
198 return term
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diff changeset
199
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diff changeset
200 def unslugifyTaxonomyTerm(self, term):
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diff changeset
201 #TODO: same as above.
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diff changeset
202 split_terms = term.split('/')
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diff changeset
203 if len(split_terms) == 1:
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diff changeset
204 return term
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diff changeset
205 return tuple(split_terms)
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diff changeset
206
3
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207 def _uriFormatRepl(self, m):
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208 name = m.group('name')
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diff changeset
209 #TODO: fix this hard-coded shit
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210 if name == 'year':
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diff changeset
211 return '%(year)04d'
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212 if name == 'month':
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diff changeset
213 return '%(month)02d'
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214 if name == 'day':
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215 return '%(day)02d'
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216 return '%(' + name + ')s'
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217
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218 def _uriPatternRepl(self, m):
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219 name = m.group('name')
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220 qualifier = m.group('qual')
334
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parents: 329
diff changeset
221 if qualifier == 'path' or self.taxonomy_name:
173
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parents: 154
diff changeset
222 return r'(?P<%s>[^\?]*)' % name
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parents: 154
diff changeset
223 return r'(?P<%s>[^/\?]+)' % name
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parents: 154
diff changeset
224
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parents: 154
diff changeset
225 def _uriNoPathRepl(self, m):
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parents: 154
diff changeset
226 name = m.group('name')
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diff changeset
227 qualifier = m.group('qual')
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diff changeset
228 if qualifier == 'path':
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diff changeset
229 return ''
3
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230 return r'(?P<%s>[^/\?]+)' % name
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231
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232 def _createTemplateFunc(self, func_def):
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233 if func_def is None:
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234 return
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235
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diff changeset
236 m = template_func_re.match(func_def)
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diff changeset
237 if m is None:
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diff changeset
238 raise Exception("Template function definition for route '%s' "
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239 "has invalid syntax: %s" %
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
240 (self.uri_pattern, func_def))
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diff changeset
241
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diff changeset
242 self.template_func_name = m.group('name')
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243 self.template_func_args.append(m.group('first_arg'))
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244 arg_list = m.group('other_args')
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diff changeset
245 if arg_list:
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246 self.template_func_args += template_func_arg_re.findall(arg_list)
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diff changeset
247
334
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parents: 329
diff changeset
248 if self.taxonomy_name:
3
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249 # This will be a taxonomy route function... this means we can
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250 # have a variable number of parameters, but only one parameter
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251 # definition, which is the value.
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252 if len(self.template_func_args) != 1:
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253 raise Exception("Route '%s' is a taxonomy route and must have "
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254 "only one argument, which is the term value." %
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parents:
diff changeset
255 self.uri_pattern)
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parents:
diff changeset
256
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257 def template_func(*args):
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258 if len(args) == 0:
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259 raise Exception(
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260 "Route function '%s' expected at least one "
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261 "argument." % func_def)
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262
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263 # Term combinations can be passed as an array, or as multiple
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264 # arguments.
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265 values = args
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266 if len(args) == 1 and isinstance(args[0], list):
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267 values = args[0]
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268
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269 # We need to register this use of a taxonomy term.
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270 if len(values) == 1:
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271 registered_values = values[0]
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272 else:
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273 registered_values = tuple(values)
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274 eis = self.app.env.exec_info_stack
338
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275 cpi = eis.current_page_info.render_ctx.current_pass_info
344
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276 if cpi:
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277 cpi.used_taxonomy_terms.add(
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278 (self.source_name, self.taxonomy_name,
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279 registered_values))
3
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280
334
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281 str_values = self.slugifyTaxonomyTerm(registered_values)
3
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282 term_name = self.template_func_args[0]
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283 metadata = {term_name: str_values}
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284
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285 return self.getUri(metadata)
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286
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287 else:
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288 # Normal route function.
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289 def template_func(*args):
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290 if len(args) != len(self.template_func_args):
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291 raise Exception(
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292 "Route function '%s' expected %d arguments, "
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293 "got %d." %
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294 (func_def, len(self.template_func_args),
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295 len(args)))
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296 metadata = {}
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297 for arg_name, arg_val in zip(self.template_func_args, args):
438
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298 #TODO: fix this hard-coded shit.
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299 if arg_name in ['year', 'month', 'day']:
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300 arg_val = int(arg_val)
3
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301 metadata[arg_name] = arg_val
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302 return self.getUri(metadata)
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303
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304 self.template_func = template_func
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305
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306
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307 class CompositeRouteFunction(object):
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308 def __init__(self):
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309 self._funcs = []
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310 self._arg_names = None
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311
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312 def addFunc(self, route):
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313 if self._arg_names is None:
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314 self._arg_names = sorted(route.template_func_args)
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315
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316 if sorted(route.template_func_args) != self._arg_names:
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317 raise Exception("Cannot merge route function with arguments '%s' "
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318 "with route function with arguments '%s'." %
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319 (route.template_func_args, self._arg_names))
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320 self._funcs.append((route, route.template_func))
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321
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322 def __call__(self, *args, **kwargs):
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323 if len(self._funcs) == 1 or len(args) == len(self._arg_names):
3
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324 f = self._funcs[0][1]
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325 return f(*args, **kwargs)
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326
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327 if len(args) == len(self._arg_names) + 1:
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328 f_args = args[:-1]
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329 for r, f in self._funcs:
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330 if r.source_name == args[-1]:
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331 return f(f_args, **kwargs)
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332 raise Exception("No such source: %s" % args[-1])
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333
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334 raise Exception("Incorrect number of arguments for route function. "
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335 "Expected '%s', got '%s'" % (self._arg_names, args))
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336