TG1 server.webpath mechanics makes it impossible to use a filter on the controller itself. So we put it on the root controller and carrefully change the WSRoot webpath so that everything works properly

wsme/root.py

@@ -105,9 +105,9 @@ class WSRoot(object):
     def _select_protocol(self, request):
         log.debug("Selecting a protocol for the following request :\n"
                   "headers: %s\nbody: %s", request.headers,
-                  len(request.body) > 512
+                  request.body and (len(request.body) > 512
                   and request.body[:512]
-                  or request.body)
+                  or request.body) or '')
         protocol = None
         if 'wsmeproto' in request.params:
             return self._get_protocol(request.params['wsmeproto'])
@@ -173,6 +173,7 @@ class WSRoot(object):
             protocol = self._select_protocol(request)
         except Exception, e:
             msg = ("Error while selecting protocol: %s" % str(e))
+            log.exception(msg)
             protocol = None
 
         if protocol is None:

wsme/tg1.py

@@ -1,17 +1,22 @@
 import cherrypy
 from cherrypy.filters.basefilter import BaseFilter
 import webob
-from turbogears import expose
+from turbogears import expose, config
+from turbogears.startup import call_on_startup, call_on_shutdown
 
 
 class WSMECherrypyFilter(BaseFilter):
+    def __init__(self, controller):
+        self.controller = controller
+        self.webpath = None
+
     def on_start_resource(self):
-        cherrypy.request.processRequestBody = False
+        path = cherrypy.request.path
+        if path.startswith(self.controller._wsroot._webpath):
+            cherrypy.request.processRequestBody = False
 
 
 class Controller(object):
-    _cp_filters = [WSMECherrypyFilter()]
-
     def __init__(self, wsroot):
         self._wsroot = wsroot
 
@@ -25,4 +30,20 @@ class Controller(object):
 
 
 def adapt(wsroot):
-    return Controller(wsroot)
+    controller = Controller(wsroot)
+    filter_ = WSMECherrypyFilter(controller)
+
+    def install_filter():
+        filter_.webpath = config.get('server.webpath') or ''
+        controller._wsroot._webpath = \
+            filter_.webpath + controller._wsroot._webpath
+        cherrypy.root._cp_filters.append(filter_)
+
+    def uninstall_filter():
+        cherrypy.root._cp_filters.remove(filter_)
+        controller._wsroot._webpath = \
+            controller._wsroot._webpath[len(filter_.webpath):]
+
+    call_on_startup.append(install_filter)
+    call_on_shutdown.append(uninstall_filter)
+    return controller