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annotate piecrust/data/builder.py @ 420:f1b759c188b0

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internal: Optimize page data building. Instead of loading the page to get its configuration, use a lazy-loader.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 20 Jun 2015 23:27:04 -0700
parents 9caaf78a17db
children 32c7c2d219d2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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f9f67086415c Allow adding to the default content model instead of replacing it.
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diff changeset
1 import re
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2 import time
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3 import copy
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4 import logging
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5 from werkzeug.utils import cached_property
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6 from piecrust import APP_VERSION
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7 from piecrust.configuration import merge_dicts
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8 from piecrust.data.assetor import Assetor
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9 from piecrust.data.base import LazyPageConfigData
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10 from piecrust.data.debug import build_debug_info
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11 from piecrust.data.linker import PageLinkerData
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12 from piecrust.data.paginator import Paginator
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13 from piecrust.uriutil import split_sub_uri
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16 logger = logging.getLogger(__name__)
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18
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19 class DataBuildingContext(object):
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20 def __init__(self, qualified_page, page_num=1):
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21 self.page = qualified_page
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22 self.page_num = page_num
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23 self.pagination_source = None
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24 self.pagination_filter = None
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25
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26 @property
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27 def app(self):
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28 return self.page.app
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29
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30 @cached_property
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31 def uri(self):
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32 return self.page.getUri(self.page_num)
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35 def build_page_data(ctx):
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36 app = ctx.app
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37 page = ctx.page
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38 first_uri, _ = split_sub_uri(app, ctx.uri)
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39
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40 pc_data = PieCrustData()
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41 config_data = LazyPageConfigData(page)
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42 pgn_source = ctx.pagination_source or get_default_pagination_source(page)
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43 paginator = Paginator(page, pgn_source,
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44 page_num=ctx.page_num,
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45 pgn_filter=ctx.pagination_filter)
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62c7a97c8340 Get the un-paginated URL of a page early and pass that around.
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46 assetor = Assetor(page, first_uri)
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47 linker = PageLinkerData(page.source, page.rel_path)
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48 data = {
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49 'piecrust': pc_data,
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50 'page': config_data,
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51 'assets': assetor,
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52 'pagination': paginator,
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53 'family': linker
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54 }
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56 for k, v in page.source_metadata.items():
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57 config_data.mapValue(k, copy.deepcopy(v))
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58 config_data.mapValue('url', ctx.uri, override_existing=True)
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59 config_data.mapValue('timestamp', time.mktime(page.datetime.timetuple()),
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60 override_existing=True)
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61 date_format = app.config.get('site/date_format')
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62 if date_format:
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63 config_data.mapValue('date', page.datetime.strftime(date_format),
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64 override_existing=True)
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66 #TODO: handle slugified taxonomy terms.
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67
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68 site_data = build_site_data(page)
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69 merge_dicts(data, site_data)
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71 # Do this at the end because we want all the data to be ready to be
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72 # displayed in the debugger window.
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73 if (app.config.get('site/show_debug_info') and
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74 not app.config.get('baker/is_baking')):
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75 pc_data._enableDebugInfo(page, data)
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77 return data
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80 def build_layout_data(page, page_data, contents):
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81 for name, txt in contents.items():
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82 if name in page_data:
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83 logger.warning("Content segment '%s' will hide existing data." %
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84 name)
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85 page_data[name] = txt
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87
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88 class PieCrustData(object):
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89 debug_render = ['version', 'url', 'branding', 'debug_info']
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90 debug_render_invoke = ['version', 'url', 'branding', 'debug_info']
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91 debug_render_redirect = {'debug_info': '_debugRenderDebugInfo'}
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92
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93 def __init__(self):
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94 self.version = APP_VERSION
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95 self.url = 'http://bolt80.com/piecrust/'
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96 self.branding = 'Baked with <em><a href="%s">PieCrust</a> %s</em>.' % (
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97 'http://bolt80.com/piecrust/', APP_VERSION)
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98 self._page = None
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99 self._data = None
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100
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101 @property
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102 def debug_info(self):
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103 if self._page is not None and self._data is not None:
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104 try:
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105 return build_debug_info(self._page, self._data)
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106 except Exception as ex:
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107 logger.exception(ex)
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108 return ('An error occured while generating debug info. '
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109 'Please check the logs.')
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110 return ''
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111
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112 def _enableDebugInfo(self, page, data):
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113 self._page = page
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114 self._data = data
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115
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116 def _debugRenderDebugInfo(self):
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117 return "The very thing you're looking at!"
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118
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119
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120 re_endpoint_sep = re.compile(r'[\/\.]')
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121
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122
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123 def build_site_data(page):
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124 app = page.app
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125 data = app.config.getDeepcopy(app.debug)
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126 for source in app.sources:
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127 endpoint_bits = re_endpoint_sep.split(source.data_endpoint)
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128 endpoint = data
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129 for e in endpoint_bits[:-1]:
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130 if e not in endpoint:
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131 endpoint[e] = {}
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132 endpoint = endpoint[e]
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133 user_data = endpoint.get(endpoint_bits[-1])
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134 provider = source.buildDataProvider(page, user_data)
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135 endpoint[endpoint_bits[-1]] = provider
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136 return data
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137
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138
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139 def get_default_pagination_source(page):
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140 app = page.app
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141 source_name = page.config.get('source') or page.config.get('blog')
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142 if source_name is None:
323
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143 source_name = app.config.get('site/default_pagination_source')
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144 if source_name is None:
3
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145 blog_names = app.config.get('site/blogs')
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146 if blog_names is not None:
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147 source_name = blog_names[0]
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148 else:
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149 source_name = app.sources[0].name
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150 source = app.getSource(source_name)
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151 return source
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152