Mercurial > hg > decoupage
annotate decoupage/web.py @ 92:c5895d87c65e
lets get these ordered
author | Jeff Hammel <k0scist@gmail.com> |
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date | Sat, 27 Dec 2014 10:49:58 -0800 |
parents | fca150947fb1 |
children | 21273cdb2047 |
rev | line source |
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1 """ |
87 | 2 decoupage: a dynamic file server |
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3 """ |
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4 |
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5 # TODO: |
92 | 6 |
82 | 7 # handle files with `#`s like like `#index.ini` |
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8 # -> http://k0s.org/portfolio/ideas/#index.ini# |
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9 # |
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10 # oops. Handle it better |
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11 # - either # is a magic hide character |
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12 # - or you urlescape that guy |
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13 |
92 | 14 # OrderedDict |
15 | |
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16 import os |
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17 import sys |
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18 |
92 | 19 from collections import OrderedDict |
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20 from contenttransformer.app import FileTypeTransformer |
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21 from contenttransformer.app import transformers |
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22 from datetime import datetime |
10 | 23 from formatters import formatters |
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24 from genshi.builder import Markup |
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25 from genshi.template import TemplateLoader |
21 | 26 from genshi.template.base import TemplateError |
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27 from genshi.template.base import TemplateSyntaxError |
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28 from martini.config import ConfigMunger |
2 | 29 from paste.fileapp import FileApp |
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30 from pkg_resources import iter_entry_points |
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31 from pkg_resources import load_entry_point |
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32 from pkg_resources import resource_filename |
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33 from webob import Request, Response, exc |
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34 |
61 | 35 transformers = transformers() |
84 | 36 string = (str, unicode) |
37 | |
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38 class Decoupage(object): |
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39 |
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40 ### class level variables |
84 | 41 defaults = { 'auto_reload': False, |
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42 'configuration': None, |
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43 'directory': None, # directory to serve |
84 | 44 'cascade': True, # whether to cascade configuration |
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45 'template': 'index.html', # XXX see below |
82 | 46 'template_directories': '', # list of directories to look for templates |
47 'charset': 'utf-8', # content encoding for index.html files; -> `Content-Type: text/html; charset=ISO-8859-1` | |
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48 } |
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49 |
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50 def __init__(self, **kw): |
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51 |
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52 # set defaults from app configuration |
84 | 53 for key, default_value in self.defaults.items(): |
54 | |
55 value = kw.get(key, default_value) | |
56 | |
57 # handle non-string bools | |
58 if isinstance(default_value, bool) and isinstance(value, string): | |
59 value = {'true': True, | |
60 'false': False}[value.lower()] | |
61 # TODO: error handling for bad strings | |
62 | |
63 setattr(self, key, value) | |
64 | |
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65 |
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66 # configure defaults |
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67 assert self.directory, "Decoupage: directory not specified" |
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68 self.directory = self.directory.rstrip(os.path.sep) |
75 | 69 assert os.path.isdir(self.directory), "'%s' is not a directory" % self.directory |
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70 self.template_directories = self.template_directories.split() # no spaces in directory names, for now |
30 | 71 |
72 for directory in self.template_directories: | |
73 assert os.path.isdir(directory), "Decoupage template directory %s does not exist!" % directory | |
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74 |
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75 # static file server |
61 | 76 self.fileserver = FileApp |
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77 |
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78 # pluggable formats |
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79 s = 'format.' |
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80 _format_args = [ (i.split(s, 1)[-1], j) for i, j in kw.items() |
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81 if i.startswith(s) ] |
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82 format_args = {} |
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83 for i, j in _format_args: |
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84 assert i.count('.') == 1, 'Illegal string or something' |
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85 format_name, var_name = i.split('.') |
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86 format_args.setdefault(format_name, {})[var_name] = j |
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87 self.formats = {} |
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88 for _format in iter_entry_points('decoupage.formats'): |
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89 try: |
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90 _cls = _format.load() |
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91 _instance = _cls(self, **format_args.get(_format.name, {})) |
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92 except Exception, e: |
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93 # record the error, but persist |
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94 print >> sys.stderr, "Couldn't load format: %s" % _format |
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95 print >> sys.stderr, e |
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96 continue |
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97 self.formats[_format.name] = _instance |
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98 |
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99 # pluggable index data formatters |
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100 self.formatters = {} |
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101 for formatter in iter_entry_points('decoupage.formatters'): |
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102 try: |
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103 _formatter = formatter.load() |
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104 template_dir = resource_filename(formatter.module_name, 'templates') |
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105 if template_dir not in self.template_directories and os.path.isdir(template_dir): |
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106 self.template_directories.append(template_dir) |
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107 except Exception, e: |
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108 # record the error, but persist |
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109 print >> sys.stderr, "Couldn't load formatter: %s" % formatter |
74 | 110 print >> sys.stderr, e |
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111 continue |
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112 self.formatters[formatter.name] = _formatter |
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113 |
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114 # template loader |
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115 self.loader = TemplateLoader(self.template_directories, |
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116 variable_lookup="lenient", |
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117 auto_reload=self.auto_reload) |
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118 |
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119 |
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120 ### methods dealing with HTTP |
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121 |
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122 def __call__(self, environ, start_response): |
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123 |
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124 # boilerplate: request and filename |
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125 request = Request(environ) |
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126 filename = request.path_info.strip('/') |
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127 path = os.path.join(self.directory, filename) |
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128 |
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129 # check to see what we have to serve |
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130 if os.path.exists(path): |
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131 |
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132 if os.path.isdir(path): |
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133 # serve an index |
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134 if request.path_info.endswith('/'): |
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135 res = self.get(request) |
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136 else: |
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137 res = exc.HTTPMovedPermanently(add_slash=True) |
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138 return res(environ, start_response) |
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139 |
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140 else: |
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141 # serve a file |
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142 conf = self.conf(request.path_info.rsplit('/',1)[0]) |
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143 if '/transformer' in conf: |
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144 args = [i.split('=', 1) for i in conf['/transformer'].split(',') if '=' in i] |
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145 kwargs = {} |
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146 for i in conf: |
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147 if i.startswith('/'): |
61 | 148 name = i[1:] |
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149 if name in transformers: |
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150 kwargs[name] = dict([j.split('=', 1) for j in conf[i].split(',') if '=' in j]) |
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151 fileserver = FileTypeTransformer(*args, **kwargs) |
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152 else: |
61 | 153 fileserver = self.fileserver |
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154 |
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155 fileserver = fileserver(path) |
2 | 156 return fileserver(environ, start_response) |
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157 else: |
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158 # file does not exist |
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159 conf = self.conf('/') |
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160 data = dict(request=request, |
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161 title="Not Found") |
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162 template = self.loader.load('HTTPNotFound.html') |
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163 body = template.generate(**data).render('html', doctype='html') |
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164 response = Response(content_type='text/html', body=body, status=404) |
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165 return response(environ, start_response) |
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166 |
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167 |
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168 def get(self, request): |
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169 """ |
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170 return response to a GET requst |
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171 """ |
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172 |
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173 # ensure a sane path |
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174 path = request.path_info.strip('/') |
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175 directory = os.path.join(self.directory, path) |
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176 path = '/%s' % path |
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177 |
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178 # get the configuraton |
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179 conf = self.conf(path) |
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180 |
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181 ### build data dictionary |
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182 # TODO: separate these out into several formatters |
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183 files = self.filedata(path, directory, conf) |
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184 data = {'path': path, 'files': files, 'request': request } |
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185 |
65 | 186 # add a function to get the path to files |
187 data['filepath'] = lambda *segments: os.path.join(*([directory] + list(segments))) | |
188 | |
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189 # defaults |
15 | 190 data['directory'] = directory |
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191 data['css'] = () |
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192 data['scripts'] = () |
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193 |
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194 # apply formatters |
85 | 195 formatters = self.get_formatters(path) |
196 for formatter in formatters: | |
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197 formatter(request, data) |
10 | 198 |
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199 # return an alternate format if specified |
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200 # decoupage.formats should return a 2-tuple: |
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201 # (content_type, body) |
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202 if 'format' in request.GET: |
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203 format_name = request.GET['format'] |
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204 if format_name in self.formats: |
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205 _format = self.formats[format_name] |
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206 content_type, body = _format(request, data) |
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207 return Response(content_type=content_type, body=body) |
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208 |
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209 # render the template |
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210 template = conf.get('/template') |
69 | 211 local_index = False |
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212 if template is None: |
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213 if 'index.html' in [ f['name'] for f in files ]: |
20 | 214 local_index = os.path.join(directory, 'index.html') |
215 template = local_index | |
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216 else: |
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217 template = self.template |
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218 else: |
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219 if not os.path.isabs(template): |
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220 _template = os.path.join(directory, template) |
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221 if os.path.exists(_template): |
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222 template = _template |
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223 else: |
65 | 224 for _directory in self.template_directories: |
225 if template in os.listdir(_directory): | |
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226 break |
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227 else: |
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228 raise IOError("template %s not found" % template) |
20 | 229 try: |
21 | 230 template = self.loader.load(template) |
20 | 231 res = template.generate(**data).render('html', doctype='html') |
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232 except (TemplateError, TemplateSyntaxError), e: |
20 | 233 if local_index: |
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234 print repr(e) |
20 | 235 return self.fileserver(local_index) |
236 raise | |
237 | |
82 | 238 # set charset if given |
239 kw = {} | |
240 if self.charset: | |
241 kw['charset'] = self.charset | |
242 | |
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243 # return response |
82 | 244 return Response(content_type='text/html', body=res, **kw) |
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245 |
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246 |
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247 ### internal methods |
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248 |
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249 def filedata(self, path, directory, conf=None): |
92 | 250 conf = conf or OrderedDict() |
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251 files = [] |
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252 |
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253 # get data for files |
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254 filenames = os.listdir(directory) |
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255 for i in filenames: |
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256 filepath = os.path.join(directory, i) |
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257 filetype = 'file' |
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258 if os.path.isdir(filepath): |
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259 filetype = 'directory' |
76 | 260 try: |
261 modified = os.path.getmtime(filepath) | |
262 except OSError: | |
263 # the file (mysteriously) may not exist by this time(!) | |
264 # File "/home/jhammel/web/src/decoupage/decoupage/web.py", line 114, in __call__ | |
265 # res = self.get(request) | |
266 # File "/home/jhammel/web/src/decoupage/decoupage/web.py", line 162, in get | |
267 # files = self.filedata(path, directory, conf) | |
268 # File "/home/jhammel/web/src/decoupage/decoupage/web.py", line 246, in filedata | |
269 # modified = os.path.getmtime(filepath) | |
270 # File "/home/jhammel/web/lib/python2.6/genericpath.py", line 54, in getmtime | |
271 # return os.stat(filename).st_mtime | |
272 # OSError: [Errno 2] No such file or directory: '/home/jhammel/web/site/portfolio/ideas/.#index.ini' | |
273 continue # wt{h,f}??? | |
274 | |
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275 modified = datetime.fromtimestamp(modified) |
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276 data = {'path' : '%s/%s' % (path.rstrip('/'), i), |
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277 'name': i, |
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278 'modified': modified, |
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279 'type': filetype} |
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280 if filetype == 'file': |
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281 data['size'] = os.path.getsize(filepath) |
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282 files.append(data) |
69 | 283 |
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284 # TODO: deal with other links in conf |
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285 for i in conf: |
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286 if i in filenames or i.startswith('/'): |
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287 continue |
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288 if i.startswith('http://') or i.startswith('https://'): |
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289 files.append({'path': i, |
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290 'name': i, |
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291 'type': link}) |
69 | 292 |
52
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293 for f in files: |
61 | 294 f['description'] = conf.get(f['name'], None) |
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295 |
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296 return files |
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297 |
10 | 298 def conf(self, path, cascade=None): |
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299 """returns configuration dictionary appropriate to a path""" |
10 | 300 if cascade is None: |
301 cascase = self.cascade | |
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302 |
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303 directory = os.path.join(self.directory, path.strip('/')) |
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304 if path.strip('/'): |
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305 path_tuple = tuple(path.strip('/').split('/')) |
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306 else: |
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307 path_tuple = () |
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308 |
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309 # return cached configuration |
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310 if hasattr(self, '_conf') and path_tuple in self._conf: |
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311 return self._conf[path_tuple] |
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312 |
92 | 313 conf = OrderedDict() |
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314 |
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315 # local configuration |
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316 ini_path = os.path.join(directory, 'index.ini') |
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317 if os.path.exists(ini_path): |
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318 _conf = ConfigMunger(ini_path).dict() |
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319 if len(_conf) == 1: |
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320 conf = _conf[_conf.keys()[0]].copy() |
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321 |
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322 # global configuration |
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323 if not conf and self.configuration and os.path.exists(self.configuration): |
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324 conf = ConfigMunger(self.configuration).dict().get('/%s' % path.rstrip('/'), {}) |
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325 |
10 | 326 # inherit and cascade configuration |
327 inherit_directory = None | |
328 if '/inherit' in conf: | |
329 inherit_directory = conf['/inherit'] | |
330 elif self.cascade and path_tuple: | |
331 inherit_directory = '/%s' % '/'.join(path_tuple[:-1]) | |
332 if inherit_directory: | |
333 parent_configuration = self.conf(inherit_directory) | |
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334 for key, value in parent_configuration.items(): |
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335 if key.startswith('/') and key not in conf: |
69 | 336 conf[key] = value |
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337 |
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338 # cache configuration |
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339 if not self.auto_reload: |
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340 if not hasattr(self, '_conf'): |
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341 self._conf = {} |
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342 self._conf[path_tuple] = conf |
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343 |
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344 return conf |
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345 |
85 | 346 def get_formatters(self, path): |
347 """return formatters for a path""" | |
348 retval = [] | |
349 conf = self.conf(path) | |
350 # apply formatters | |
351 # XXX this should be cached if not self.auto_reload | |
352 if '/formatters' in conf: | |
353 # ordered list of formatters to be applied first | |
354 formatters = [ i for i in conf['/formatters'].split() | |
355 if i in self.formatters ] | |
356 else: | |
357 formatters = [] | |
358 for key in conf: | |
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359 if key.startswith('/'): |
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360 key = key[1:] |
85 | 361 if key in self.formatters and key not in formatters: |
362 formatters.append(key) | |
363 for name in formatters: | |
364 retval.append(self.formatters[name](conf.get('/%s' % name, ''))) | |
89 | 365 return retval |