floof/controllers/error.py

   1 import cgi
   2
   3 from paste.urlparser import PkgResourcesParser
   4 from pylons import request
   5 from pylons.controllers.util import forward
   6 from pylons.middleware import error_document_template
   7 from webhelpers.html.builder import literal
   8
   9 from floof.lib.base import BaseController
  10
  11 class ErrorController(BaseController):
  12
  13     """Generates error documents as and when they are required.
  14
  15     The ErrorDocuments middleware forwards to ErrorController when error
  16     related status codes are returned from the application.
  17
  18     This behaviour can be altered by changing the parameters to the
  19     ErrorDocuments middleware in your config/middleware.py file.
  20
  21     """
  22
  23     def document(self):
  24         """Render the error document"""
  25         resp = request.environ.get('pylons.original_response')
  26         content = literal(resp.body) or cgi.escape(request.GET.get('message', ''))
  27         page = error_document_template % \
  28             dict(prefix=request.environ.get('SCRIPT_NAME', ''),
  29                  code=cgi.escape(request.GET.get('code', str(resp.status_int))),
  30                  message=content)
  31         return page
  32
  33     def img(self, id):
  34         """Serve Pylons' stock images"""
  35         return self._serve_file('/'.join(['media/img', id]))
  36
  37     def style(self, id):
  38         """Serve Pylons' stock stylesheets"""
  39         return self._serve_file('/'.join(['media/style', id]))
  40
  41     def _serve_file(self, path):
  42         """Call Paste's FileApp (a WSGI application) to serve the file
  43         at the specified path
  44         """
  45         request.environ['PATH_INFO'] = '/%s' % path
  46         return forward(PkgResourcesParser('pylons', 'pylons'))