Make REST-API updates work with WSGI

Now the Content-Type header is handled specially, it doesn't have a
HTTP_ prefix in WSGI. Also make some form lookups more robust in rest.

Author: schlatterbeck

roundup/cgi/wsgi_handler.py

@@ -28,7 +28,12 @@ def __init__(self, environ):
         self.environ = environ
 
     def mangle_name(self, name):
+        """ Content-Type is handled specially, it doesn't have a HTTP_
+            prefix in cgi.
+        """
         n = name.replace('-', '_').upper()
+        if n == 'CONTENT_TYPE':
+            return n
         return 'HTTP_' + n
 
     def get(self, name, default = None):

roundup/rest.py

@@ -1828,7 +1828,9 @@ def dispatch(self, method, uri, input):
         # check for pretty print
         try:
             pretty_output = not input['@pretty'].value.lower() == "false"
-        except KeyError:
+        # Can also return a TypeError ("not indexable")
+        # In case the FieldStorage could not parse the result
+        except (KeyError, TypeError):
             pretty_output = True
 
         # check for @apiver in query string
@@ -1838,7 +1840,9 @@ def dispatch(self, method, uri, input):
         try:
             if not self.api_version:
                 self.api_version = int(input['@apiver'].value)
-        except KeyError:
+        # Can also return a TypeError ("not indexable")
+        # In case the FieldStorage could not parse the result
+        except (KeyError, TypeError):
             self.api_version = None
         except ValueError:
             output = self.error_obj(400, msg%input['@apiver'].value)