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annotate piecrust/sources/base.py @ 281:0641fe5c3ef9

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serve: Don't crash when a post URL doesn't match our expectations. It can happen that a posts source's URL pattern matches that of something else, like a taxonomy page. In this case, don't crash when what we think will be integers turn out to be something else. Instead, just return that no page has been found.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 01 Mar 2015 21:41:05 -0800
parents f130365568ff
children 88bffd469b04
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import logging
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2 from werkzeug.utils import cached_property
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3 from piecrust.configuration import ConfigurationError
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4 from piecrust.page import Page
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5
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6
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7 REALM_USER = 0
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8 REALM_THEME = 1
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9 REALM_NAMES = {
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10 REALM_USER: 'User',
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11 REALM_THEME: 'Theme'}
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12
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13
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14 MODE_PARSING = 0
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15 MODE_CREATING = 1
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16
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17
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18 logger = logging.getLogger(__name__)
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19
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20
114
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21 def build_pages(app, factories):
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22 with app.env.page_repository.startBatchGet():
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23 for f in factories:
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24 yield f.buildPage()
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25
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26
3
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27 class InvalidFileSystemEndpointError(Exception):
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28 def __init__(self, source_name, fs_endpoint):
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29 super(InvalidFileSystemEndpointError, self).__init__(
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30 "Invalid file-system endpoint for source '%s': %s" %
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31 (source_name, fs_endpoint))
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32
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33
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34 class PageFactory(object):
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35 """ A class responsible for creating a page.
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36 """
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37 def __init__(self, source, rel_path, metadata):
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38 self.source = source
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39 self.rel_path = rel_path
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40 self.metadata = metadata
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41
50
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42 @cached_property
3
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43 def ref_spec(self):
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44 return '%s:%s' % (self.source.name, self.rel_path)
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45
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46 @cached_property
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47 def path(self):
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48 return self.source.resolveRef(self.rel_path)
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49
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50 def buildPage(self):
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51 repo = self.source.app.env.page_repository
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52 if repo is not None:
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53 cache_key = '%s:%s' % (self.source.name, self.rel_path)
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54 return repo.get(cache_key, self._doBuildPage)
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55 return self._doBuildPage()
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56
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57 def _doBuildPage(self):
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58 logger.debug("Building page: %s" % self.path)
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59 page = Page(self.source, self.metadata, self.rel_path)
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60 # Load it right away, especially when using the page repository,
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61 # because we'll be inside a critical scope.
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62 page._load()
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63 return page
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64
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65
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66 class PageSource(object):
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67 """ A source for pages, e.g. a directory with one file per page.
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68 """
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69 def __init__(self, app, name, config):
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70 self.app = app
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71 self.name = name
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72 self.config = config
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73 self._factories = None
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74 self._provider_type = None
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75
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76 def __getattr__(self, name):
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77 try:
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78 return self.config[name]
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79 except KeyError:
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80 raise AttributeError()
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81
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82 @property
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83 def is_theme_source(self):
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84 return self.realm == REALM_THEME
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85
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86 @property
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87 def root_dir(self):
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88 if self.is_theme_source:
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89 return self.app.theme_dir
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90 return self.app.root_dir
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91
114
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92 def getPages(self):
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93 return build_pages(self.app, self.getPageFactories())
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94
3
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95 def getPageFactories(self):
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96 if self._factories is None:
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97 self._factories = list(self.buildPageFactories())
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98 return self._factories
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99
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100 def buildPageFactories(self):
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101 raise NotImplementedError()
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102
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103 def resolveRef(self, ref_path):
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104 raise NotImplementedError()
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105
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106 def findPagePath(self, metadata, mode):
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107 raise NotImplementedError()
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108
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109 def buildDataProvider(self, page, user_data):
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110 if self._provider_type is None:
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111 cls = next((pt for pt in self.app.plugin_loader.getDataProviders()
242
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112 if pt.PROVIDER_NAME == self.data_type),
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113 None)
3
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114 if cls is None:
242
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115 raise ConfigurationError(
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116 "Unknown data provider type: %s" % self.data_type)
3
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117 self._provider_type = cls
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118
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119 return self._provider_type(self, page, user_data)
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120
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121 def getTaxonomyPageRef(self, tax_name):
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122 tax_pages = self.config.get('taxonomy_pages')
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123 if tax_pages is None:
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124 return None
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125 return tax_pages.get(tax_name)
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126