Refactor routing in app.py.

Move some things out of app.py into functions in
routing.py. This makes app.py a bit more readable and
allows us to rewrite routing.

mediagoblin/app.py

@@ -17,7 +17,7 @@
 import os
 import logging
 
-from mediagoblin.routing import url_map, view_functions, add_route
+from mediagoblin.routing import get_url_map, endpoint_to_controller
 
 from werkzeug.wrappers import Request
 from werkzeug.exceptions import HTTPException, NotFound
@@ -93,10 +93,7 @@ class MediaGoblinApp(object):
         self.public_store, self.queue_store = setup_storage()
 
         # set up routing
-        self.url_map = url_map
-
-        for route in PluginManager().get_routes():
-            add_route(*route)
+        self.url_map = get_url_map()
 
         # set up staticdirector tool
         self.staticdirector = get_staticdirector(app_config)
@@ -194,18 +191,7 @@ class MediaGoblinApp(object):
                 request, exc,
                 exc.get_description(environ))(environ, start_response)
 
-        view_func = view_functions[endpoint]
-
-        _log.debug('endpoint: {0} view_func: {1}'.format(
-            endpoint,
-            view_func))
-
-        # import the endpoint, or if it's already a callable, call that
-        if isinstance(view_func, unicode) \
-                or isinstance(view_func, str):
-            controller = common.import_component(view_func)
-        else:
-            controller = view_func
+        controller = endpoint_to_controller(endpoint)
 
         # pass the request through our meddleware classes
         try:

mediagoblin/routing.py

@@ -14,12 +14,33 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import logging
+
 from werkzeug.routing import Map, Rule
+from mediagoblin.tools.common import import_component
+from mediagoblin.tools.pluginapi import PluginManager
+
+
+_log = logging.getLogger(__name__)
 
 url_map = Map()
 
 view_functions = {}
 
+
+def endpoint_to_controller(endpoint):
+    view_func = view_functions[endpoint]
+
+    _log.debug('endpoint: {0} view_func: {1}'.format(endpoint, view_func))
+
+    # import the endpoint, or if it's already a callable, call that
+    if isinstance(view_func, basestring):
+        view_func = import_component(view_func)
+        view_functions[endpoint] = view_func
+
+    return view_func
+
+
 def add_route(endpoint, url, controller):
     """
     Add a route to the url mapping
@@ -33,6 +54,7 @@ def add_route(endpoint, url, controller):
 
     url_map.add(Rule(url, endpoint=endpoint))
 
+
 def mount(mountpoint, routes):
     """
     Mount a bunch of routes to this mountpoint
@@ -41,6 +63,14 @@ def mount(mountpoint, routes):
         url = "%s/%s" % (mountpoint.rstrip('/'), url.lstrip('/'))
         add_route(endpoint, url, controller)
 
+
+def get_url_map():
+    for route in PluginManager().get_routes():
+        add_route(*route)
+
+    return url_map
+
+
 add_route('index', '/', 'mediagoblin.views:root_view')
 
 from mediagoblin.admin.routing import admin_routes