Mercurial > hg > decoupage

annotate decoupage/web.py @ 50:d327dc7de14f

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add size of file to metadata
author Jeff Hammel <jhammel@mozilla.com>
date Wed, 03 Nov 2010 18:17:30 -0700
parents ac693b8df32c
children a2f09d749a3f
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1 """
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2 decoupage: a view with webob to index and serve static content
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3 """
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4
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5 import os
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6 import sys
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7
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8 from contenttransformer.app import FileTypeTransformer
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9 from contenttransformer.app import transformers
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af73a3fda723 add more metadata to files: modification time, type
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10 from datetime import datetime
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11 from formatters import formatters
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12 from genshi.builder import Markup
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13 from genshi.template import TemplateLoader
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14 from genshi.template.base import TemplateError
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15 from genshi.template.base import TemplateSyntaxError
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16 from martini.config import ConfigMunger
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17 from paste.fileapp import FileApp
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18 from pkg_resources import iter_entry_points
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19 from pkg_resources import load_entry_point
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20 from pkg_resources import resource_filename
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21 from webob import Request, Response, exc
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22
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23 transformers = [i.lower() for i in transformers()]
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24
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25 class Decoupage(object):
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27 ### class level variables
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28 defaults = { 'auto_reload': 'False',
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29 'configuration': None,
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30 'directory': None, # directory to serve
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31 'cascade': 'True', # whether to cascade configuration
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32 'template': 'index.html', # XXX see below
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33 'template_directories': '' # list of directories to look for templates
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34 }
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36 def __init__(self, **app_conf):
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38 # set defaults from app configuration
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39 kw = self.app_conf('decoupage', app_conf)
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40 for key in self.defaults:
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41 setattr(self, key, kw.get(key, self.defaults[key]))
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43 # configure defaults
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44 self.auto_reload = self.auto_reload.lower() == 'true'
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45 self.cascade = self.cascade.lower() == 'true'
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46 self.directory = self.directory.rstrip(os.path.sep)
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47 assert os.path.isdir(self.directory)
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48 self.template_directories = self.template_directories.split() # no spaces in directory names, for now
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49
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50 for directory in self.template_directories:
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51 assert os.path.isdir(directory), "Decoupage template directory %s does not exist!" % directory
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53 # static file server
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54 self.fileserver = FileApp # XXX still used?!?
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55
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56 # pluggable formats
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57 self.formats = {}
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58 for _format in iter_entry_points('decoupage.formats'):
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59 try:
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60 function = _format.load()
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61 except Exception, e:
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62 # record the error, but persist
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63 print >> sys.stderr, "Couldn't load format: %s" % _format
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64 print >> sys.stderr, e
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65 continue
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66 self.formats[_format.name] = function
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68 # pluggable index data formatters
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69 self.formatters = {}
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70 for formatter in iter_entry_points('decoupage.formatters'):
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71 try:
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72 _formatter = formatter.load()
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73 template_dir = resource_filename(formatter.module_name, 'templates')
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74 if template_dir not in self.template_directories and os.path.isdir(template_dir):
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75 self.template_directories.append(template_dir)
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76 except Exception, e:
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77 # record the error, but persist
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78 print >> sys.stderr, "Couldn't load formatter: %s" % formatter
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79 print >> sts.stderr, e
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80 continue
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81 self.formatters[formatter.name] = _formatter
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83 # template loader
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84 self.loader = TemplateLoader(self.template_directories,
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85 auto_reload=self.auto_reload)
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86
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88
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89 ### methods dealing with HTTP
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90 def __call__(self, environ, start_response):
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91 request = Request(environ)
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92 filename = request.path_info.strip('/')
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93 path = os.path.join(self.directory, filename)
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94 if os.path.exists(path):
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95 if os.path.isdir(path):
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97 if not request.path_info.endswith('/'):
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98 raise exc.HTTPMovedPermanently(add_slash=True)
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100 res = self.get(request)
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101 return res(environ, start_response)
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102 else:
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103 conf = self.conf(request.path_info.rsplit('/',1)[0])
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104 if '/transformer' in conf:
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105 args = [i.split('=', 1) for i in conf['/transformer'].split(',') if '=' in i]
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106 kwargs = {}
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107 for i in conf:
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108 if i.startswith('/'):
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109 name = i[1:].lower()
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110 if name in transformers:
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111 kwargs[name] = dict([j.split('=', 1) for j in conf[i].split(',') if '=' in j])
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112 fileserver = FileTypeTransformer(*args, **kwargs)
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113 else:
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114 fileserver = FileApp
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115
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116 fileserver = fileserver(path)
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117 return fileserver(environ, start_response)
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118 else:
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119 raise exc.HTTPNotFound()
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120
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121
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122 def get(self, request):
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123 """
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124 return response to a GET requst
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125 """
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126
0
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127 # ensure a sane path
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128 path = request.path_info.strip('/')
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129 directory = os.path.join(self.directory, path)
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130 path = '/%s' % path
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131
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132 # get the configuraton
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133 conf = self.conf(path)
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134
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135 ### build data dictionary
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136 files = self.filedata(path, directory, conf)
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137 data = {'path': path, 'files': files, 'request': request }
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138
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139 # defaults; TODO: make this better
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140 # there shouldn't need to be defaults;
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141 # iirc, genshi has a mode where these will default to None
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142 data['title'] = conf.get('/title')
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143 data['directory'] = directory
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144 data['include'] = None
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145 data['css'] = ()
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146 data['scripts'] = ()
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147 data['icon'] = None
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148
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149 # apply formatters
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150 # XXX this should be cached if not self.auto_reload
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151 if '/formatters' in conf:
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152 # ordered list of formatters to be applied first
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153 formatters = [ i for i in conf['/formatters'].split()
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154 if i in self.formatters ]
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155 else:
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156 formatters = []
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157 for key in conf:
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158 if key.startswith('/'):
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159 key = key[1:]
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160 if key in self.formatters and key not in formatters:
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161 formatters.append(key)
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162 for name in formatters:
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163 formatter = self.formatters[name](conf.get('/%s' % name, ''))
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164 formatter(request, data)
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165
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166 # return an alternate format if specified
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167 # decoupage.formats should return a 2-tuple:
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168 # (content_type, body)
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169 if 'format' in request.GET:
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170 format_name = request.GET['format']
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171 if format_name in self.formats:
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172 function = self.formats[format_name]
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173 content_type, body = function(data)
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174 return Response(content_type=content_type, body=body)
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175
0
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176 # render the template
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177 template = conf.get('/template')
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178 local_index = False
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179 if template is None:
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180 if 'index.html' in [ f['name'] for f in files ]:
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181 local_index = os.path.join(directory, 'index.html')
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182 template = local_index
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183 else:
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184 template = self.template
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185 else:
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186 if not os.path.isabs(template):
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187 _template = os.path.join(directory, template)
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188 if os.path.exists(_template):
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189 template = _template
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190 else:
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191 for directory in self.template_directories:
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192 if template in os.listdir(directory):
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193 break
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194 else:
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195 raise IOError("template %s not found" % template)
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196 try:
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197 template = self.loader.load(template)
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198 res = template.generate(**data).render('html', doctype='html')
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199 except (TemplateError, TemplateSyntaxError), e:
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200 if local_index:
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201 print repr(e)
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202 return self.fileserver(local_index)
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203 raise
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204
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205 # return response
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206 return Response(content_type='text/html', body=res)
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207
0
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208
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209 ### internal methods
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210
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211 def filedata(self, path, directory, conf):
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212 files = []
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213
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214 for i in os.listdir(directory):
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215 filepath = os.path.join(directory, i)
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216 filetype = 'file'
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217 if os.path.isdir(filepath):
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218 filetype = 'directory'
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219 modified = os.path.getmtime(filepath)
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220 modified = datetime.fromtimestamp(modified)
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221 files.append({'path' : '%s/%s' % (path.rstrip('/'), i),
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222 'name': i,
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223 'size': os.path.getsize(filepath),
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224 'modified': modified,
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225 'description': conf.get(i.lower(), None),
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226 'type': filetype})
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227
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228 # TODO: deal with other links in conf
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229
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230 return files
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231
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232 def conf(self, path, cascade=None):
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233 """returns configuration dictionary appropriate to a path"""
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234 if cascade is None:
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235 cascase = self.cascade
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236
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237 directory = os.path.join(self.directory, path.strip('/'))
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238 if path.strip('/'):
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239 path_tuple = tuple(path.strip('/').split('/'))
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240 else:
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241 path_tuple = ()
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242
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243 # return cached configuration
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244 if hasattr(self, '_conf') and path_tuple in self._conf:
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245 return self._conf[path_tuple]
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246
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247 conf = {}
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248
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249 # local configuration
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250 ini_path = os.path.join(directory, 'index.ini')
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251 if os.path.exists(ini_path):
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252 _conf = ConfigMunger(ini_path).dict()
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253 if len(_conf) == 1:
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254 conf = _conf[_conf.keys()[0]].copy()
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255
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256 # global configuration
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257 if not conf and self.configuration and os.path.exists(self.configuration):
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258 conf = ConfigMunger(self.configuration).dict().get('/%s' % path.rstrip('/'), {})
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259
10
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260 # inherit and cascade configuration
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261 inherit_directory = None
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262 if '/inherit' in conf:
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263 inherit_directory = conf['/inherit']
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264 elif self.cascade and path_tuple:
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265 inherit_directory = '/%s' % '/'.join(path_tuple[:-1])
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266 if inherit_directory:
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267 parent_configuration = self.conf(inherit_directory)
0
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268 for key, value in parent_configuration.items():
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269 if key.startswith('/') and key not in conf:
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270 conf[key] = value
0
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271
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272 # cache configuration
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273 if not self.auto_reload:
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274 if not hasattr(self, '_conf'):
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275 self._conf = {}
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276 self._conf[path_tuple] = conf
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277
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278 return conf
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279
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280 def fmtrs(self, path):
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281 formatters = []
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282 for key, value in self.conf(path).items():
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283 if key.startswith('/'):
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284 key = key[1:]
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285 if key in self.formatters:
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286 formatter = self.formatters[key](value)
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287
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288
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289 def app_conf(self, keystr, app_conf):
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290 keystr += '.'
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291 return dict([(key.split(keystr, 1)[-1], value)
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292 for key, value in app_conf.items()
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293 if key.startswith(keystr) ])