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