Add as_int and as_bool methods to the Request class

[Ryan J Ollos]

comment:5:ticket:12325 suggested adding as_int and as_bool methods to the Request class. This was discussed further a bit later in the ticket.

as_int and as_bool in trac.util do not raise exceptions. Perhaps we should be somewhat consistent with the interface of those functions. We could add two pairs of methods with the following behaviors:

• as_int(self, name, default=None, min=None, max=None)
  • Return default if name not in dict
  • Return default if exception raised converting self[name] to an int
• getint(self, name, default=None, min=None, max=None)
  • Return default if name not in dict
  • Raise HTTPBadRequest if exception is raised converting self[name] to an int

get_int would be a better name, but getint is more consistent with getfirst and getlist. Also it seems reasonable to expect that a get method might raise an exception.