Mercurial > hg > decoupage
annotate decoupage/web.py @ 74:dd7d385e11ea
error and bump
author | Jeff Hammel <jhammel@mozilla.com> |
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date | Tue, 28 Aug 2012 22:04:26 -0700 |
parents | 12ee37017538 |
children | 7db9d9b82a06 |
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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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10 from datetime import datetime |
10 | 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 |
21 | 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 |
2 | 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 |
61 | 23 transformers = transformers() |
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24 |
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25 class Decoupage(object): |
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26 |
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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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35 |
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36 def __init__(self, **kw): |
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37 |
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38 # set defaults from app configuration |
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39 for key in self.defaults: |
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40 setattr(self, key, kw.get(key, self.defaults[key])) |
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41 |
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42 # configure defaults |
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43 assert self.directory, "Decoupage: directory not specified" |
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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 |
30 | 49 |
50 for directory in self.template_directories: | |
51 assert os.path.isdir(directory), "Decoupage template directory %s does not exist!" % directory | |
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52 |
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53 # static file server |
61 | 54 self.fileserver = FileApp |
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55 |
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56 # pluggable formats |
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57 s = 'format.' |
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58 _format_args = [ (i.split(s, 1)[-1], j) for i, j in kw.items() |
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59 if i.startswith(s) ] |
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60 format_args = {} |
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61 for i, j in _format_args: |
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62 assert i.count('.') == 1, 'Illegal string or something' |
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63 format_name, var_name = i.split('.') |
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64 format_args.setdefault(format_name, {})[var_name] = j |
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65 self.formats = {} |
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66 for _format in iter_entry_points('decoupage.formats'): |
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67 try: |
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68 _cls = _format.load() |
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69 _instance = _cls(self, **format_args.get(_format.name, {})) |
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70 except Exception, e: |
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71 # record the error, but persist |
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72 print >> sys.stderr, "Couldn't load format: %s" % _format |
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73 print >> sys.stderr, e |
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74 continue |
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75 self.formats[_format.name] = _instance |
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76 |
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77 # pluggable index data formatters |
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78 self.formatters = {} |
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79 for formatter in iter_entry_points('decoupage.formatters'): |
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80 try: |
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81 _formatter = formatter.load() |
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82 template_dir = resource_filename(formatter.module_name, 'templates') |
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83 if template_dir not in self.template_directories and os.path.isdir(template_dir): |
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84 self.template_directories.append(template_dir) |
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85 except Exception, e: |
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86 # record the error, but persist |
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87 print >> sys.stderr, "Couldn't load formatter: %s" % formatter |
74 | 88 print >> sys.stderr, e |
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89 continue |
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90 self.formatters[formatter.name] = _formatter |
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91 |
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92 # template loader |
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93 self.loader = TemplateLoader(self.template_directories, |
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94 variable_lookup="lenient", |
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95 auto_reload=self.auto_reload) |
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96 |
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97 |
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98 |
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99 ### methods dealing with HTTP |
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100 |
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101 def __call__(self, environ, start_response): |
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102 |
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103 # boilerplate: request and filename |
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104 request = Request(environ) |
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105 filename = request.path_info.strip('/') |
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106 path = os.path.join(self.directory, filename) |
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107 |
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108 # check to see what we have to serve |
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109 if os.path.exists(path): |
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110 |
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111 if os.path.isdir(path): |
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112 # serve an index |
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113 if request.path_info.endswith('/'): |
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114 res = self.get(request) |
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115 else: |
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116 res = exc.HTTPMovedPermanently(add_slash=True) |
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117 return res(environ, start_response) |
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118 |
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119 else: |
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120 # serve a file |
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121 conf = self.conf(request.path_info.rsplit('/',1)[0]) |
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122 if '/transformer' in conf: |
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123 args = [i.split('=', 1) for i in conf['/transformer'].split(',') if '=' in i] |
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124 kwargs = {} |
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125 for i in conf: |
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126 if i.startswith('/'): |
61 | 127 name = i[1:] |
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128 if name in transformers: |
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129 kwargs[name] = dict([j.split('=', 1) for j in conf[i].split(',') if '=' in j]) |
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130 fileserver = FileTypeTransformer(*args, **kwargs) |
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131 else: |
61 | 132 fileserver = self.fileserver |
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133 |
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134 fileserver = fileserver(path) |
2 | 135 return fileserver(environ, start_response) |
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136 else: |
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137 # file does not exist |
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138 conf = self.conf('/') |
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139 data = dict(request=request, |
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140 title="Not Found") |
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141 template = self.loader.load('HTTPNotFound.html') |
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142 body = template.generate(**data).render('html', doctype='html') |
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143 response = Response(content_type='text/html', body=body, status=404) |
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144 return response(environ, start_response) |
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145 |
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146 |
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147 def get(self, request): |
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148 """ |
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149 return response to a GET requst |
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150 """ |
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151 |
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152 # ensure a sane path |
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153 path = request.path_info.strip('/') |
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154 directory = os.path.join(self.directory, path) |
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155 path = '/%s' % path |
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156 |
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157 # get the configuraton |
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158 conf = self.conf(path) |
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159 |
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160 ### build data dictionary |
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161 # TODO: separate these out into several formatters |
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162 files = self.filedata(path, directory, conf) |
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163 data = {'path': path, 'files': files, 'request': request } |
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164 |
65 | 165 # add a function to get the path to files |
166 data['filepath'] = lambda *segments: os.path.join(*([directory] + list(segments))) | |
167 | |
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168 # defaults |
15 | 169 data['directory'] = directory |
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170 data['css'] = () |
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171 data['scripts'] = () |
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172 |
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173 # apply formatters |
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174 # XXX this should be cached if not self.auto_reload |
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175 if '/formatters' in conf: |
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176 # ordered list of formatters to be applied first |
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177 formatters = [ i for i in conf['/formatters'].split() |
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178 if i in self.formatters ] |
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179 else: |
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180 formatters = [] |
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181 for key in conf: |
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182 if key.startswith('/'): |
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183 key = key[1:] |
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184 if key in self.formatters and key not in formatters: |
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185 formatters.append(key) |
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186 for name in formatters: |
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187 formatter = self.formatters[name](conf.get('/%s' % name, '')) |
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188 formatter(request, data) |
10 | 189 |
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190 # return an alternate format if specified |
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191 # decoupage.formats should return a 2-tuple: |
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192 # (content_type, body) |
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193 if 'format' in request.GET: |
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194 format_name = request.GET['format'] |
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195 if format_name in self.formats: |
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196 _format = self.formats[format_name] |
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197 content_type, body = _format(request, data) |
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198 return Response(content_type=content_type, body=body) |
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199 |
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200 # render the template |
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201 template = conf.get('/template') |
69 | 202 local_index = False |
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203 if template is None: |
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204 if 'index.html' in [ f['name'] for f in files ]: |
20 | 205 local_index = os.path.join(directory, 'index.html') |
206 template = local_index | |
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207 else: |
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208 template = self.template |
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209 else: |
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210 if not os.path.isabs(template): |
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211 _template = os.path.join(directory, template) |
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212 if os.path.exists(_template): |
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213 template = _template |
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214 else: |
65 | 215 for _directory in self.template_directories: |
216 if template in os.listdir(_directory): | |
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217 break |
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218 else: |
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219 raise IOError("template %s not found" % template) |
20 | 220 try: |
21 | 221 template = self.loader.load(template) |
20 | 222 res = template.generate(**data).render('html', doctype='html') |
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223 except (TemplateError, TemplateSyntaxError), e: |
20 | 224 if local_index: |
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225 print repr(e) |
20 | 226 return self.fileserver(local_index) |
227 raise | |
228 | |
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229 # return response |
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230 return Response(content_type='text/html', body=res) |
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231 |
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232 |
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233 ### internal methods |
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234 |
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235 def filedata(self, path, directory, conf=None): |
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236 conf = conf or {} |
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237 files = [] |
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238 |
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239 # get data for files |
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240 filenames = os.listdir(directory) |
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241 for i in filenames: |
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242 filepath = os.path.join(directory, i) |
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243 filetype = 'file' |
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244 if os.path.isdir(filepath): |
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245 filetype = 'directory' |
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246 modified = os.path.getmtime(filepath) |
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247 modified = datetime.fromtimestamp(modified) |
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248 data = {'path' : '%s/%s' % (path.rstrip('/'), i), |
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249 'name': i, |
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250 'modified': modified, |
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251 'type': filetype} |
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252 if filetype == 'file': |
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253 data['size'] = os.path.getsize(filepath) |
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254 files.append(data) |
69 | 255 |
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256 # TODO: deal with other links in conf |
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257 for i in conf: |
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258 if i in filenames or i.startswith('/'): |
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259 continue |
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260 if i.startswith('http://') or i.startswith('https://'): |
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261 files.append({'path': i, |
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262 'name': i, |
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263 'type': link}) |
69 | 264 |
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265 for f in files: |
61 | 266 f['description'] = conf.get(f['name'], None) |
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267 |
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268 return files |
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269 |
10 | 270 def conf(self, path, cascade=None): |
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271 """returns configuration dictionary appropriate to a path""" |
10 | 272 if cascade is None: |
273 cascase = self.cascade | |
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274 |
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275 directory = os.path.join(self.directory, path.strip('/')) |
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276 if path.strip('/'): |
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277 path_tuple = tuple(path.strip('/').split('/')) |
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278 else: |
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279 path_tuple = () |
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280 |
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281 # return cached configuration |
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282 if hasattr(self, '_conf') and path_tuple in self._conf: |
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283 return self._conf[path_tuple] |
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284 |
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285 conf = {} |
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286 |
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287 # local configuration |
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288 ini_path = os.path.join(directory, 'index.ini') |
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289 if os.path.exists(ini_path): |
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290 _conf = ConfigMunger(ini_path).dict() |
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291 if len(_conf) == 1: |
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292 conf = _conf[_conf.keys()[0]].copy() |
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293 |
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294 # global configuration |
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295 if not conf and self.configuration and os.path.exists(self.configuration): |
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296 conf = ConfigMunger(self.configuration).dict().get('/%s' % path.rstrip('/'), {}) |
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297 |
10 | 298 # inherit and cascade configuration |
299 inherit_directory = None | |
300 if '/inherit' in conf: | |
301 inherit_directory = conf['/inherit'] | |
302 elif self.cascade and path_tuple: | |
303 inherit_directory = '/%s' % '/'.join(path_tuple[:-1]) | |
304 if inherit_directory: | |
305 parent_configuration = self.conf(inherit_directory) | |
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306 for key, value in parent_configuration.items(): |
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307 if key.startswith('/') and key not in conf: |
69 | 308 conf[key] = value |
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309 |
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310 # cache configuration |
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311 if not self.auto_reload: |
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312 if not hasattr(self, '_conf'): |
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313 self._conf = {} |
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314 self._conf[path_tuple] = conf |
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315 |
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316 return conf |
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317 |
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318 def fmtrs(self, path): |
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319 formatters = [] |
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320 for key, value in self.conf(path).items(): |
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321 if key.startswith('/'): |
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322 key = key[1:] |
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323 if key in self.formatters: |
69 | 324 formatter = self.formatters[key](value) |
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325 |