Add json response method to the Base handler class

validate method from ngforms now return the dictionary of values

handlers.py

@@ -1,5 +1,6 @@
 
 import webapp2
+from webapp2_extras import json
 
 import os
 
@@ -9,3 +10,7 @@ def render(self, name, *args, **kwargs):
     template = jinja_environment.get_template(os.path.join("templates", 
         ('%s.html' % name) ))
     self.response.out.write(template.render(*args, **kwargs))
+
+  def json(self, value):
+    self.response.headers['Content-Type'] = 'application/json; charset=utf-8'
+    self.response.out.write(json.encode(value))

ngforms.py

@@ -21,18 +21,18 @@ def validate(self):
     data = json.decode(request.body)
 
     for f in self.fields:
-      vals = self.validations[f.id]
-
       try:
-        value = data[f.id]
+        value = data[f.id].strip()
       except KeyError:
         value = ''
 
       field_values[f.id] = value
-      for val in vals:
+      for val in self.validations[f.id]:
         if not val.validate(self):    
           request.abort(403)
 
+    return field_values
+
   @property
   def fields(self):
     raise NotImplemented()