code/view.py

   1 import os
   2
   3 import cherrypy
   4 from mako.template import Template
   5 from mako.lookup import TemplateLookup
   6 import simplejson
   7 import datetime, decimal
   8 from invirt.config import structs as config
   9 from webcommon import State
  10
  11 class MakoHandler(cherrypy.dispatch.LateParamPageHandler):
  12     """Callable which sets response.body."""
  13
  14     def __init__(self, template, next_handler, content_type='text/html; charset=utf-8'):
  15         self.template = template
  16         self.next_handler = next_handler
  17         self.content_type = content_type
  18
  19     def __call__(self):
  20         env = globals().copy()
  21         env.update(self.next_handler())
  22         cherrypy.response.headers['Content-Type'] = self.content_type
  23         return self.template.render(**env)
  24
  25
  26 class MakoLoader(object):
  27
  28     def __init__(self):
  29         self.lookups = {}
  30
  31     def __call__(self, filename, directories, module_directory=None,
  32                  collection_size=-1, content_type='text/html; charset=utf-8',
  33                  imports=[]):
  34         # Find the appropriate template lookup.
  35         key = (tuple(directories), module_directory)
  36         try:
  37             lookup = self.lookups[key]
  38         except KeyError:
  39             lookup = TemplateLookup(directories=directories,
  40                                     module_directory=module_directory,
  41                                     collection_size=collection_size,
  42                                     default_filters=['decode.utf8'],
  43                                     input_encoding='utf-8',
  44                                     output_encoding='utf-8',
  45                                     imports=imports,
  46                                     )
  47             self.lookups[key] = lookup
  48         cherrypy.request.lookup = lookup
  49
  50         # Replace the current handler.
  51         cherrypy.request.template = t = lookup.get_template(filename)
  52         cherrypy.request.handler = MakoHandler(t, cherrypy.request.handler, content_type)
  53
  54 main = MakoLoader()
  55 cherrypy.tools.mako = cherrypy.Tool('on_start_resource', main)
  56
  57 class JSONEncoder(simplejson.JSONEncoder):
  58         def default(self, obj):
  59                 if isinstance(obj, datetime.datetime):
  60                         return str(obj)
  61                 elif isinstance(obj, decimal.Decimal):
  62                         return float(obj)
  63                 else:
  64                         return simplejson.JSONEncoder.default(self, obj)
  65
  66 def jsonify_tool_callback(*args, **kwargs):
  67     if not cherrypy.request.cached:
  68         response = cherrypy.response
  69         response.headers['Content-Type'] = 'text/javascript'
  70         response.body = JSONEncoder().iterencode(response.body)
  71
  72 cherrypy.tools.jsonify = cherrypy.Tool('before_finalize', jsonify_tool_callback, priority=30)
  73
  74 def external_remote_user_login():
  75     pass
  76
  77 def require_login():
  78     """If the user isn't logged in, raise 403 with an error."""
  79     if cherrypy.request.login is False:
  80         raise cherrypy.HTTPError(403,
  81             "You are not authorized to access that resource")
  82
  83 cherrypy.tools.require_login = cherrypy.Tool('on_start_resource', require_login, priority=150)
  84
  85 def remote_user_login():
  86     """Get the current user based on the SSL or GSSAPI environment variables"""
  87     environ = cherrypy.request.wsgi_environ
  88     user = environ.get('REMOTE_USER')
  89     if user is None:
  90         return
  91     else:
  92         cherrypy.request.login = None # clear what cherrypy put there
  93
  94     if environ.get('AUTH_TYPE') == 'Negotiate':
  95         # Convert the krb5 principal into a krb4 username
  96         if not user.endswith('@%s' % config.kerberos.realm):
  97             cherrypy.request.login = False # failed to login
  98         else:
  99             cherrypy.request.login = user.split('@')[0].replace('/', '.')
 100     else:
 101         cherrypy.request.login = user
 102
 103 cherrypy.tools.remote_user_login = cherrypy.Tool('on_start_resource', remote_user_login, priority=50)
 104
 105 def invirtwebstate_init():
 106     """Initialize the cherrypy.request.state object from Invirt"""
 107     cherrypy.request.state = State(cherrypy.request.login)
 108
 109 cherrypy.tools.invirtwebstate = cherrypy.Tool('on_start_resource', invirtwebstate_init, priority=100)
 110
 111 class View(object):
 112     _cp_config = {'tools.mako.directories': [os.path.join(os.path.dirname(__file__),'templates')]}