Mercurial > piecrust2

annotate piecrust/page.py @ 52:e52241394791

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Don't use file-system caching for rendered segments yet. TODO: need some bake scheduler first!
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 25 Aug 2014 08:45:16 -0700
parents fce061f8c2ed
children 563ce5dd02af
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 from werkzeug.utils import cached_property
3
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11 from piecrust.configuration import (Configuration, ConfigurationError,
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12 parse_config_header)
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13 from piecrust.environment import PHASE_PAGE_PARSING
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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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33
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34
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35 class Page(object):
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36 def __init__(self, source, source_metadata, rel_path):
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37 self.source = source
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38 self.source_metadata = source_metadata
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39 self.rel_path = rel_path
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40 self._config = None
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41 self._raw_content = None
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42 self._datetime = None
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43
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44 @property
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45 def app(self):
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46 return self.source.app
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47
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48 @property
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49 def ref_spec(self):
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50 return '%s:%s' % (self.source.name, self.rel_path)
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51
49
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52 @cached_property
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53 def path(self):
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54 return self.source.resolveRef(self.rel_path)
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55
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56 @cached_property
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57 def path_mtime(self):
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58 return os.path.getmtime(self.path)
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59
3
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60 @property
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61 def config(self):
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62 self._load()
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63 return self._config
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64
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65 @property
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66 def raw_content(self):
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67 self._load()
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68 return self._raw_content
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69
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70 @property
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71 def datetime(self):
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72 if self._datetime is None:
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73 if 'datetime' in self.source_metadata:
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74 self._datetime = self.source_metadata['datetime']
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75 elif 'date' in self.source_metadata:
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76 page_date = self.source_metadata['date']
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77 timestr = self.config.get('time')
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78 if timestr is not None:
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79 try:
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80 time_dt = dateutil.parser.parse(timestr)
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81 except Exception as e:
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82 raise ConfigurationError(
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83 "Invalid time '%s' in page: %s" %
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84 (timestr, self.path), e)
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85 page_time = datetime.time(time_dt.hour, time_dt.minute, time_dt.second)
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86 else:
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87 page_time = datetime.time(0, 0, 0)
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88 self._datetime = datetime.datetime.combine(page_date, page_time)
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89 else:
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90 self._datetime = datetime.datetime.fromtimestamp(self.path_mtime)
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91 return self._datetime
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92
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93 @datetime.setter
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94 def datetime(self, value):
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95 self._datetime = value
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96
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97 def getSegment(self, name='content'):
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98 return self.raw_content[name]
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99
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100 def _load(self):
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101 if self._config is not None:
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102 return
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103
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104 eis = self.app.env.exec_info_stack
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105 eis.pushPage(self, PHASE_PAGE_PARSING, None)
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106 try:
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107 config, content = load_page(self.app, self.path, self.path_mtime)
3
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108 self._config = config
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109 self._raw_content = content
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110 finally:
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111 eis.popPage()
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112
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113
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114 class PageLoadingError(Exception):
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115 def __init__(self, path, inner=None):
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116 super(PageLoadingError, self).__init__(
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117 "Error loading page: %s" % path,
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118 inner)
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119
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120
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121 class ContentSegment(object):
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122 debug_render_func = 'debug_render'
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123
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124 def __init__(self, content=None, fmt=None):
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125 self.parts = []
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126 if content is not None:
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127 self.parts.append(ContentSegmentPart(content, fmt))
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128
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129 def debug_render(self):
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130 return '\n'.join([p.content for p in self.parts])
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131
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132
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133 class ContentSegmentPart(object):
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134 def __init__(self, content, fmt=None, line=-1):
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135 self.content = content
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136 self.fmt = fmt
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137 self.line = line
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138
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139 def __str__(self):
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140 return '%s [%s]' % (self.content, self.fmt or '<default>')
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141
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142
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143 def json_load_segments(data):
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144 segments = {}
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145 for key, seg_data in data.items():
3
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146 seg = ContentSegment()
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147 for p_data in seg_data:
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148 part = ContentSegmentPart(p_data['c'], p_data['f'], p_data['l'])
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149 seg.parts.append(part)
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150 segments[key] = seg
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151 return segments
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152
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153
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154 def json_save_segments(segments):
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155 data = {}
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156 for key, seg in segments.items():
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157 seg_data = []
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158 for part in seg.parts:
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159 p_data = {'c': part.content, 'f': part.fmt, 'l': part.line}
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160 seg_data.append(p_data)
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161 data[key] = seg_data
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162 return data
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163
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164
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165 def load_page(app, path, path_mtime=None):
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166 try:
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167 return _do_load_page(app, path, path_mtime)
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168 except Exception as e:
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169 logger.exception("Error loading page: %s" %
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170 os.path.relpath(path, app.root_dir))
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171 _, __, traceback = sys.exc_info()
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172 raise PageLoadingError(path, e).with_traceback(traceback)
3
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173
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174
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175 def _do_load_page(app, path, path_mtime):
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176 exec_info = app.env.exec_info_stack.current_page_info
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177 if exec_info is None:
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178 raise Exception("Loading page '%s' but not execution context has "
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179 "been created for it." % path)
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180
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181 # Check the cache first.
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182 cache = app.cache.getCache('pages')
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183 cache_path = "%s.json" % hashlib.md5(path.encode('utf8')).hexdigest()
49
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184 page_time = path_mtime or os.path.getmtime(path)
3
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185 if cache.isValid(cache_path, page_time):
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186 exec_info.was_cache_valid = True
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187 cache_data = json.loads(cache.read(cache_path))
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188 config = PageConfiguration(values=cache_data['config'],
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189 validate=False)
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190 content = json_load_segments(cache_data['content'])
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191 return config, content
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192
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193 # Nope, load the page from the source file.
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194 exec_info.was_cache_valid = False
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195 logger.debug("Loading page configuration from: %s" % path)
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196 with codecs.open(path, 'r', 'utf-8') as fp:
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197 raw = fp.read()
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198 header, offset = parse_config_header(raw)
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199
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200 if not 'format' in header:
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201 auto_formats = app.config.get('site/auto_formats')
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202 name, ext = os.path.splitext(path)
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203 header['format'] = auto_formats.get(ext, None)
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204
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205 config = PageConfiguration(header)
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206 content = parse_segments(raw, offset)
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207 config.set('segments', list(content.keys()))
3
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208
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209 # Save to the cache.
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210 cache_data = {
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211 'config': config.get(),
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212 'content': json_save_segments(content)}
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213 cache.write(cache_path, json.dumps(cache_data))
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214
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215 return config, content
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216
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217
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218 segment_pattern = re.compile(
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219 r"""^\-\-\-\s*(?P<name>\w+)(\:(?P<fmt>\w+))?\s*\-\-\-\s*$""",
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220 re.M)
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221 part_pattern = re.compile(
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222 r"""^<\-\-\s*(?P<fmt>\w+)\s*\-\->\s*$""",
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223 re.M)
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224
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225
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226 def parse_segments(raw, offset=0):
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227 matches = list(segment_pattern.finditer(raw, offset))
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228 num_matches = len(matches)
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229 if num_matches > 0:
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230 contents = {}
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231
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232 first_offset = matches[0].start()
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233 if first_offset > 0:
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234 # There's some default content segment at the beginning.
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235 seg = ContentSegment()
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236 seg.parts = parse_segment_parts(raw, offset, first_offset)
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237 contents['content'] = seg
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238
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239 for i in range(1, num_matches):
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240 m1 = matches[i - 1]
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241 m2 = matches[i]
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242 seg = ContentSegment()
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243 seg.parts = parse_segment_parts(raw, m1.end() + 1,
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244 m2.start(), m1.group('fmt'))
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245 contents[m1.group('name')] = seg
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246
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247 # Handle text past the last match.
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248 lastm = matches[-1]
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249 seg = ContentSegment()
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250 seg.parts = parse_segment_parts(raw, lastm.end() + 1,
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251 len(raw), lastm.group('fmt'))
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252 contents[lastm.group('name')] = seg
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253
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254 return contents
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255 else:
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256 # No segments, just content.
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257 seg = ContentSegment()
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258 seg.parts = parse_segment_parts(raw, offset, len(raw))
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259 return {'content': seg}
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260
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261
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262 def parse_segment_parts(raw, start, end, first_part_fmt=None):
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263 matches = list(part_pattern.finditer(raw, start, end))
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264 num_matches = len(matches)
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265 if num_matches > 0:
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266 parts = []
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267
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268 # First part, before the first format change.
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269 parts.append(
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270 ContentSegmentPart(raw[start:matches[0].start()],
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271 first_part_fmt,
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272 start))
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273
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274 for i in range(1, num_matches):
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275 m1 = matches[i - 1]
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276 m2 = matches[i]
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277 parts.append(
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278 ContentSegmentPart(
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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279 raw[m1.end() + 1:m2.start()],
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280 m1.group('fmt'),
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281 m1.end() + 1))
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282
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283 lastm = matches[-1]
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284 parts.append(ContentSegmentPart(raw[lastm.end() + 1:end],
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285 lastm.group('fmt'),
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286 lastm.end() + 1))
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287
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288 return parts
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289 else:
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290 return [ContentSegmentPart(raw[start:end], first_part_fmt)]
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291