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[bluechips.git] / bluechips / config / middleware.py
1 """Pylons middleware initialization"""
2 from beaker.middleware import CacheMiddleware, SessionMiddleware
3 from paste.cascade import Cascade
4 from paste.registry import RegistryManager
5 from paste.urlparser import StaticURLParser
6 from paste.deploy.converters import asbool
7 from pylons import config
8 from pylons.middleware import ErrorHandler, StatusCodeRedirect
9 from pylons.wsgiapp import PylonsApp
10 from routes.middleware import RoutesMiddleware
11 from paste import httpexceptions
12
13 from tw.api import make_middleware
14 import authkit.authorize
15
16 from bluechips.config.environment import load_environment
17
18 from bluechips.lib.permissions import BlueChipUser, DummyAuthenticate
19
20 def make_app(global_conf, full_stack=True, **app_conf):
21     """Create a Pylons WSGI application and return it
22
23     ``global_conf``
24         The inherited configuration for this application. Normally from
25         the [DEFAULT] section of the Paste ini file.
26
27     ``full_stack``
28         Whether or not this application provides a full WSGI stack (by
29         default, meaning it handles its own exceptions and errors).
30         Disable full_stack when this application is "managed" by
31         another WSGI middleware.
32
33     ``app_conf``
34         The application's local configuration. Normally specified in the
35         [app:<name>] section of the Paste ini file (where <name>
36         defaults to main).
37     """
38     # Configure the Pylons environment
39     load_environment(global_conf, app_conf)
40
41     # The Pylons WSGI app
42     app = PylonsApp()
43     
44     # CUSTOM MIDDLEWARE HERE (filtered by error handling middlewares)
45     app = authkit.authorize.middleware(app, BlueChipUser())
46     app = DummyAuthenticate(app, app_conf)
47     app = httpexceptions.make_middleware(app, global_conf)
48     
49     # Routing/Session/Cache Middleware
50     app = RoutesMiddleware(app, config['routes.map'])
51     app = SessionMiddleware(app, config)
52     app = CacheMiddleware(app, config)
53     
54     app = make_middleware(app, {
55             'toscawidgets.framework': 'pylons',
56             'toscawidgets.framework.default_view': 'mako',
57             'toscawidgets.middleware.inject_resources': True
58             })
59     
60     if asbool(full_stack):
61         # Handle Python exceptions
62         app = ErrorHandler(app, global_conf, **config['pylons.errorware'])
63
64         # Display error documents for 401, 403, 404 status codes (and
65         # 500 when debug is disabled)
66         if asbool(config['debug']):
67             app = StatusCodeRedirect(app)
68         else:
69             app = StatusCodeRedirect(app, [400, 401, 403, 404, 500])
70
71     # Establish the Registry for this application
72     app = RegistryManager(app)
73
74     # Static files (If running in production, and Apache or another web 
75     # server is handling this static content, remove the following 3 lines)
76     static_app = StaticURLParser(config['pylons.paths']['static_files'])
77     app = Cascade([static_app, app])
78     return app