Mercurial > piecrust2

annotate piecrust/page.py @ 111:208c652551a3

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Quick fix for making the server correctly update referenced pages. Disable the file-system cache for rendered segments when in server mode. We can bring this optimization back when we're actually using the baking record in the server too in order to know dependencies.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 16 Oct 2014 17:03:42 -0700
parents b6ec402d32bb
children d31cbbdb4ecc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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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
108
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96 page_time = datetime.timedelta(
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97 hours=parsed_t.hour,
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98 minutes=parsed_t.minute,
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99 seconds=parsed_t.second)
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100
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101 elif isinstance(page_time, int):
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102 # Total seconds... convert to a time struct.
108
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103 page_time = datetime.timedelta(seconds=page_time)
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104
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105 elif not isinstance(page_time, datetime.timedelta):
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106 raise ConfigurationError(
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107 "Invalid time '%s' in page: %s" %
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108 (page_time, self.path))
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109
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110 try:
108
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111 self._datetime = datetime.datetime(
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112 page_date.year,
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113 page_date.month,
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114 page_date.day) + page_time
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115 except Exception as ex:
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116 raise ConfigurationError(
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117 "Invalid page time '%s' for: %s" % (
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118 page_time, self.path)) from ex
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119 else:
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120 self._datetime = datetime.datetime(
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121 page_date.year, page_date.month, page_date.day)
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122 else:
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123 self._datetime = datetime.datetime.fromtimestamp(
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124 self.path_mtime)
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125 if self._datetime is None:
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126 raise Exception("Got null datetime from path! %s" % self.path)
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127 return self._datetime
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128
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129 @datetime.setter
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130 def datetime(self, value):
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131 self._datetime = value
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132
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133 def getSegment(self, name='content'):
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134 return self.raw_content[name]
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135
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136 def _load(self):
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137 if self._config is not None:
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138 return
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139
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140 config, content, was_cache_valid = load_page(self.app, self.path,
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141 self.path_mtime)
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142 self._config = config
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143 self._raw_content = content
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144 if was_cache_valid:
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145 self._flags |= FLAG_RAW_CACHE_VALID
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146
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147
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148 class PageLoadingError(Exception):
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149 def __init__(self, path, inner=None):
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150 super(PageLoadingError, self).__init__(
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151 "Error loading page: %s" % path,
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152 inner)
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153
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154
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155 class ContentSegment(object):
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156 debug_render_func = 'debug_render'
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157
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158 def __init__(self, content=None, fmt=None):
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159 self.parts = []
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160 if content is not None:
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161 self.parts.append(ContentSegmentPart(content, fmt))
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162
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163 def debug_render(self):
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164 return '\n'.join([p.content for p in self.parts])
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165
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166
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167 class ContentSegmentPart(object):
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168 def __init__(self, content, fmt=None, line=-1):
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169 self.content = content
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170 self.fmt = fmt
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171 self.line = line
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172
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173 def __str__(self):
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174 return '%s [%s]' % (self.content, self.fmt or '<default>')
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175
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176
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177 def json_load_segments(data):
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178 segments = {}
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179 for key, seg_data in data.items():
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180 seg = ContentSegment()
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181 for p_data in seg_data:
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182 part = ContentSegmentPart(p_data['c'], p_data['f'], p_data['l'])
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183 seg.parts.append(part)
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184 segments[key] = seg
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185 return segments
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186
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187
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188 def json_save_segments(segments):
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189 data = {}
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190 for key, seg in segments.items():
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191 seg_data = []
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192 for part in seg.parts:
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193 p_data = {'c': part.content, 'f': part.fmt, 'l': part.line}
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194 seg_data.append(p_data)
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195 data[key] = seg_data
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196 return data
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197
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198
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199 def load_page(app, path, path_mtime=None):
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200 try:
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201 return _do_load_page(app, path, path_mtime)
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202 except Exception as e:
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203 logger.exception("Error loading page: %s" %
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204 os.path.relpath(path, app.root_dir))
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205 _, __, traceback = sys.exc_info()
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206 raise PageLoadingError(path, e).with_traceback(traceback)
3
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207
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208
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209 def _do_load_page(app, path, path_mtime):
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210 # Check the cache first.
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211 cache = app.cache.getCache('pages')
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212 cache_path = "%s.json" % hashlib.md5(path.encode('utf8')).hexdigest()
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213 page_time = path_mtime or os.path.getmtime(path)
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214 if cache.isValid(cache_path, page_time):
67
563ce5dd02af I don't care what the YAML spec says, ordered maps are the only sane way.
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215 cache_data = json.loads(cache.read(cache_path),
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216 object_pairs_hook=collections.OrderedDict)
3
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217 config = PageConfiguration(values=cache_data['config'],
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218 validate=False)
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219 content = json_load_segments(cache_data['content'])
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220 return config, content, True
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221
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222 # Nope, load the page from the source file.
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223 logger.debug("Loading page configuration from: %s" % path)
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224 with codecs.open(path, 'r', 'utf-8') as fp:
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225 raw = fp.read()
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226 header, offset = parse_config_header(raw)
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227
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228 if not 'format' in header:
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229 auto_formats = app.config.get('site/auto_formats')
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230 name, ext = os.path.splitext(path)
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231 header['format'] = auto_formats.get(ext, None)
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232
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233 config = PageConfiguration(header)
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234 content = parse_segments(raw, offset)
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235 config.set('segments', list(content.keys()))
3
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236
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237 # Save to the cache.
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238 cache_data = {
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239 'config': config.get(),
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240 'content': json_save_segments(content)}
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241 cache.write(cache_path, json.dumps(cache_data))
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242
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243 return config, content, False
3
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244
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245
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246 segment_pattern = re.compile(
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247 r"""^\-\-\-\s*(?P<name>\w+)(\:(?P<fmt>\w+))?\s*\-\-\-\s*$""",
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248 re.M)
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249 part_pattern = re.compile(
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250 r"""^<\-\-\s*(?P<fmt>\w+)\s*\-\->\s*$""",
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251 re.M)
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252
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253
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254 def parse_segments(raw, offset=0):
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255 matches = list(segment_pattern.finditer(raw, offset))
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256 num_matches = len(matches)
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257 if num_matches > 0:
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258 contents = {}
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259
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260 first_offset = matches[0].start()
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261 if first_offset > 0:
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262 # There's some default content segment at the beginning.
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263 seg = ContentSegment()
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264 seg.parts = parse_segment_parts(raw, offset, first_offset)
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265 contents['content'] = seg
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266
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267 for i in range(1, num_matches):
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268 m1 = matches[i - 1]
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269 m2 = matches[i]
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270 seg = ContentSegment()
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271 seg.parts = parse_segment_parts(raw, m1.end() + 1,
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272 m2.start(), m1.group('fmt'))
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273 contents[m1.group('name')] = seg
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274
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275 # Handle text past the last match.
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276 lastm = matches[-1]
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277 seg = ContentSegment()
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278 seg.parts = parse_segment_parts(raw, lastm.end() + 1,
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279 len(raw), lastm.group('fmt'))
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280 contents[lastm.group('name')] = seg
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281
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282 return contents
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283 else:
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284 # No segments, just content.
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285 seg = ContentSegment()
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286 seg.parts = parse_segment_parts(raw, offset, len(raw))
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287 return {'content': seg}
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288
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289
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290 def parse_segment_parts(raw, start, end, first_part_fmt=None):
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291 matches = list(part_pattern.finditer(raw, start, end))
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292 num_matches = len(matches)
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293 if num_matches > 0:
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294 parts = []
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295
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296 # First part, before the first format change.
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297 parts.append(
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298 ContentSegmentPart(raw[start:matches[0].start()],
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299 first_part_fmt,
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300 start))
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301
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302 for i in range(1, num_matches):
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303 m1 = matches[i - 1]
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304 m2 = matches[i]
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305 parts.append(
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306 ContentSegmentPart(
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307 raw[m1.end() + 1:m2.start()],
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308 m1.group('fmt'),
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309 m1.end() + 1))
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310
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311 lastm = matches[-1]
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312 parts.append(ContentSegmentPart(raw[lastm.end() + 1:end],
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313 lastm.group('fmt'),
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314 lastm.end() + 1))
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315
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316 return parts
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317 else:
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318 return [ContentSegmentPart(raw[start:end], first_part_fmt)]
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319