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annotate piecrust/page.py @ 105:7d2fdf43d7ca

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Property clean all caches when force baking, except the `app` cache.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 17 Sep 2014 21:49:25 -0700
parents 0445a2232de7
children b6ec402d32bb
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1 import re
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2 import sys
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3 import json
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4 import codecs
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5 import os.path
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6 import hashlib
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7 import logging
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8 import datetime
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9 import dateutil.parser
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10 import collections
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11 from werkzeug.utils import cached_property
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12 from piecrust.configuration import (Configuration, ConfigurationError,
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13 parse_config_header)
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14
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15
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16 logger = logging.getLogger(__name__)
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17
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18
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19 class PageConfiguration(Configuration):
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20 def __init__(self, values=None, validate=True):
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21 super(PageConfiguration, self).__init__(values, validate)
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22
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23 def _validateAll(self, values):
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24 values.setdefault('title', 'Untitled Page')
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25 values.setdefault('content_type', 'html')
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26 ppp = values.get('posts_per_page')
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27 if ppp is not None:
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28 values.setdefault('items_per_page', ppp)
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29 pf = values.get('posts_filters')
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30 if pf is not None:
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31 values.setdefault('items_filters', pf)
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32 return values
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34
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35 FLAG_NONE = 0
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36 FLAG_RAW_CACHE_VALID = 2**0
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37
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38
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39 class Page(object):
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40 def __init__(self, source, source_metadata, rel_path):
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41 self.source = source
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42 self.source_metadata = source_metadata
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43 self.rel_path = rel_path
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44 self._config = None
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45 self._raw_content = None
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46 self._flags = FLAG_NONE
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47 self._datetime = None
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48
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49 @property
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50 def app(self):
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51 return self.source.app
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52
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53 @property
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54 def ref_spec(self):
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55 return '%s:%s' % (self.source.name, self.rel_path)
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56
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57 @cached_property
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58 def path(self):
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59 return self.source.resolveRef(self.rel_path)
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60
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61 @cached_property
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62 def path_mtime(self):
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63 return os.path.getmtime(self.path)
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64
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65 @property
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66 def flags(self):
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67 return self._flags
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68
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69 @property
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70 def config(self):
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71 self._load()
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72 return self._config
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73
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74 @property
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75 def raw_content(self):
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76 self._load()
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77 return self._raw_content
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78
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79 @property
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80 def datetime(self):
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81 if self._datetime is None:
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82 if 'datetime' in self.source_metadata:
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83 self._datetime = self.source_metadata['datetime']
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84 elif 'date' in self.source_metadata:
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85 page_date = self.source_metadata['date']
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86 page_time = self.config.get('time')
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87 if page_time is not None:
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88 if isinstance(page_time, str):
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89 # Need to parse it...
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90 try:
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91 parsed_t = dateutil.parser.parse(page_time)
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92 except Exception as ex:
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93 raise ConfigurationError(
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94 "Invalid time '%s' in page: %s" %
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95 (page_time, self.path)) from ex
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96 page_time = datetime.time(parsed_t.hour,
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97 parsed_t.minute, parsed_t.second)
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98
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99 elif isinstance(page_time, int):
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100 # Total seconds... convert to a time struct.
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101 delta = datetime.timedelta(seconds=page_time)
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102 dummy = datetime.datetime(1970, 1, 1)
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103 dummy += delta
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104 page_time = dummy.time()
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105
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106 try:
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107 self._datetime = datetime.datetime.combine(
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108 page_date, page_time)
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109 except Exception as ex:
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110 raise ConfigurationError(
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111 "Invalid page time '%s' for: %s" % (
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112 page_time, self.path)) from ex
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113 else:
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114 self._datetime = datetime.datetime(
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115 page_date.year, page_date.month, page_date.day)
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116 else:
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117 self._datetime = datetime.datetime.fromtimestamp(
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118 self.path_mtime)
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119 if self._datetime is None:
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120 raise Exception("Got null datetime from path! %s" % self.path)
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121 return self._datetime
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122
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123 @datetime.setter
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124 def datetime(self, value):
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125 self._datetime = value
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126
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127 def getSegment(self, name='content'):
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128 return self.raw_content[name]
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129
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130 def _load(self):
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131 if self._config is not None:
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132 return
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133
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134 config, content, was_cache_valid = load_page(self.app, self.path,
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135 self.path_mtime)
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136 self._config = config
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137 self._raw_content = content
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138 if was_cache_valid:
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139 self._flags |= FLAG_RAW_CACHE_VALID
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140
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141
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142 class PageLoadingError(Exception):
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143 def __init__(self, path, inner=None):
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144 super(PageLoadingError, self).__init__(
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145 "Error loading page: %s" % path,
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146 inner)
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147
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148
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149 class ContentSegment(object):
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150 debug_render_func = 'debug_render'
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151
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152 def __init__(self, content=None, fmt=None):
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153 self.parts = []
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154 if content is not None:
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155 self.parts.append(ContentSegmentPart(content, fmt))
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156
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157 def debug_render(self):
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158 return '\n'.join([p.content for p in self.parts])
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159
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160
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161 class ContentSegmentPart(object):
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162 def __init__(self, content, fmt=None, line=-1):
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163 self.content = content
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164 self.fmt = fmt
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165 self.line = line
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166
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167 def __str__(self):
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168 return '%s [%s]' % (self.content, self.fmt or '<default>')
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169
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170
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171 def json_load_segments(data):
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172 segments = {}
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173 for key, seg_data in data.items():
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174 seg = ContentSegment()
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175 for p_data in seg_data:
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176 part = ContentSegmentPart(p_data['c'], p_data['f'], p_data['l'])
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177 seg.parts.append(part)
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178 segments[key] = seg
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179 return segments
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180
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181
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182 def json_save_segments(segments):
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183 data = {}
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184 for key, seg in segments.items():
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185 seg_data = []
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186 for part in seg.parts:
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187 p_data = {'c': part.content, 'f': part.fmt, 'l': part.line}
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188 seg_data.append(p_data)
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189 data[key] = seg_data
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190 return data
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191
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192
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193 def load_page(app, path, path_mtime=None):
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194 try:
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195 return _do_load_page(app, path, path_mtime)
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196 except Exception as e:
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197 logger.exception("Error loading page: %s" %
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198 os.path.relpath(path, app.root_dir))
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199 _, __, traceback = sys.exc_info()
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200 raise PageLoadingError(path, e).with_traceback(traceback)
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201
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202
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203 def _do_load_page(app, path, path_mtime):
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204 # Check the cache first.
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205 cache = app.cache.getCache('pages')
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206 cache_path = "%s.json" % hashlib.md5(path.encode('utf8')).hexdigest()
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207 page_time = path_mtime or os.path.getmtime(path)
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208 if cache.isValid(cache_path, page_time):
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209 cache_data = json.loads(cache.read(cache_path),
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210 object_pairs_hook=collections.OrderedDict)
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211 config = PageConfiguration(values=cache_data['config'],
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212 validate=False)
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213 content = json_load_segments(cache_data['content'])
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214 return config, content, True
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215
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216 # Nope, load the page from the source file.
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217 logger.debug("Loading page configuration from: %s" % path)
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218 with codecs.open(path, 'r', 'utf-8') as fp:
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219 raw = fp.read()
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220 header, offset = parse_config_header(raw)
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221
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222 if not 'format' in header:
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223 auto_formats = app.config.get('site/auto_formats')
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224 name, ext = os.path.splitext(path)
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225 header['format'] = auto_formats.get(ext, None)
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226
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227 config = PageConfiguration(header)
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228 content = parse_segments(raw, offset)
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229 config.set('segments', list(content.keys()))
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230
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231 # Save to the cache.
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232 cache_data = {
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233 'config': config.get(),
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234 'content': json_save_segments(content)}
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235 cache.write(cache_path, json.dumps(cache_data))
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236
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237 return config, content, False
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238
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239
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240 segment_pattern = re.compile(
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241 r"""^\-\-\-\s*(?P<name>\w+)(\:(?P<fmt>\w+))?\s*\-\-\-\s*$""",
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242 re.M)
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243 part_pattern = re.compile(
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244 r"""^<\-\-\s*(?P<fmt>\w+)\s*\-\->\s*$""",
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245 re.M)
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246
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247
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248 def parse_segments(raw, offset=0):
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249 matches = list(segment_pattern.finditer(raw, offset))
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250 num_matches = len(matches)
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251 if num_matches > 0:
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252 contents = {}
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253
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254 first_offset = matches[0].start()
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255 if first_offset > 0:
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256 # There's some default content segment at the beginning.
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257 seg = ContentSegment()
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258 seg.parts = parse_segment_parts(raw, offset, first_offset)
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259 contents['content'] = seg
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260
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261 for i in range(1, num_matches):
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262 m1 = matches[i - 1]
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263 m2 = matches[i]
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264 seg = ContentSegment()
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265 seg.parts = parse_segment_parts(raw, m1.end() + 1,
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266 m2.start(), m1.group('fmt'))
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267 contents[m1.group('name')] = seg
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268
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269 # Handle text past the last match.
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270 lastm = matches[-1]
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271 seg = ContentSegment()
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272 seg.parts = parse_segment_parts(raw, lastm.end() + 1,
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273 len(raw), lastm.group('fmt'))
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274 contents[lastm.group('name')] = seg
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275
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276 return contents
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277 else:
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278 # No segments, just content.
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279 seg = ContentSegment()
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280 seg.parts = parse_segment_parts(raw, offset, len(raw))
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281 return {'content': seg}
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282
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283
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284 def parse_segment_parts(raw, start, end, first_part_fmt=None):
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285 matches = list(part_pattern.finditer(raw, start, end))
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286 num_matches = len(matches)
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287 if num_matches > 0:
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288 parts = []
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289
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290 # First part, before the first format change.
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291 parts.append(
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292 ContentSegmentPart(raw[start:matches[0].start()],
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293 first_part_fmt,
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294 start))
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295
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296 for i in range(1, num_matches):
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297 m1 = matches[i - 1]
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298 m2 = matches[i]
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299 parts.append(
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300 ContentSegmentPart(
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301 raw[m1.end() + 1:m2.start()],
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302 m1.group('fmt'),
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303 m1.end() + 1))
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304
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305 lastm = matches[-1]
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306 parts.append(ContentSegmentPart(raw[lastm.end() + 1:end],
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307 lastm.group('fmt'),
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308 lastm.end() + 1))
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309
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310 return parts
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311 else:
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312 return [ContentSegmentPart(raw[start:end], first_part_fmt)]
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313