ripulito decoratore specifica template

cgi/cgi_test.py

@@ -23,8 +23,6 @@ print "<h3>ambiente</h3>"
 keys = os.environ.keys()
 keys.sort()
 
-
-
 for k in keys:
     print "%s = %s<br>\n" % ( k, str( os.environ[k] ) )
 

controllers/demo/due.py

@@ -1,20 +1,19 @@
 #!/usr/bin/python
 # -*- coding: utf-8; tab-width: 4; indent-tabs-mode: nil; -*-
 
-import deco # decoratori
-import traceback
+from decorators import WSGITemplate # decoratore ( singleton )
+
+wsgit = WSGITemplate()
 
 #
 # esempio minimo di controller WSGI
 #
-@deco.template( 'template1.tmpl' )
+@wsgit.template( 'template1.tmpl' )
 def application( environ, start_response ):
+    from pprint import pformat
 
-    try:
-        html = environ['template']( context=dict( v1=1, v2='pippo') )
-    except:
-        html = "<pre>" + traceback.format_exc() + "</pre>"
+    html = environ['template']( context=dict( v1=1, v2='pippo') )
 
     start_response( '200 OK', [('content-type', 'text/html; charset=utf-8')] )
 
-    return [ html ]
+    return [ html, pformat( environ, width=132 ).replace('\n','<br>\n') ] # TODO: pformat..... ---> trasformarlo in un decoratore

deco.py

@@ -1,13 +0,0 @@
-#!/usr/bin/python
-# -*- coding: utf-8; tab-width: 4; indent-tabs-mode: nil; -*-
-
-import template as tmpl
-from functools import partial
-
-def template( filename=None ):
-    def real_decorator( wsgi_application ):
-        def wrapper( environ, start_response ):
-            environ[ 'template' ] = partial( tmpl.render, filename=filename )
-            return wsgi_application( environ, start_response )
-        return wrapper
-    return real_decorator

decorators.py

@@ -0,0 +1,24 @@
+#!/usr/bin/python
+# -*- coding: utf-8; tab-width: 4; indent-tabs-mode: nil; -*-
+
+from singleton import Singleton
+from template import render
+from functools import partial
+
+
+class WSGITemplate( object ):
+    __metaclass__ = Singleton
+
+    def __init__( self, basedir=None ):
+        import os
+        self.__basedir = os.path.normpath( os.path.join( os.path.split(__file__)[0], basedir ) ) + '/'
+
+
+    def template(self, filename=None ):
+        def real_decorator( wsgi_application ):
+            def wrapper( environ, start_response ):
+                environ[ 'template' ] = partial( render, filename= self.__basedir + filename )
+                environ[ 'basedir' ] = self.__basedir
+                return wsgi_application( environ, start_response )
+            return wrapper
+        return real_decorator

dispatch_wsgi.py

@@ -10,6 +10,12 @@ wsgilib = '/'.join( __file__.split('/')[:-1] )
 if wsgilib not in sys.path:
     sys.path.insert(0, wsgilib)
 
+#
+# inizializzazione path per templating
+#
+from decorators import WSGITemplate
+WSGITemplate( basedir='views' )
+
 #
 # importazione handler
 #
@@ -52,6 +58,7 @@ handlers = (
     ( r'/mysql',    simple_mysql ),
 )
 
+
 #
 # !!! mod_wsgi richiede che la nostra applicazione si chiami 'application'
 #

singleton.py

@@ -0,0 +1,12 @@
+#!/usr/bin/python
+# -*- coding: utf-8; tab-width: 4; indent-tabs-mode: nil; -*-
+
+class Singleton(type):
+    def __init__(cls, name, bases, dict):
+        super(Singleton, cls).__init__(name, bases, dict)
+        cls.instance = None
+
+    def __call__(cls,*args,**kw):
+        if cls.instance is None:
+            cls.instance = super(Singleton, cls).__call__(*args, **kw)
+        return cls.instance