http: add handler_base::verify_mandatory_params() #2084
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before this change, this member function was a free function called
by
routes::handle()
, but sincehandler_base
is closer to the_mandatory_param
and in the following change, we will storethe expected param types in
_mandatory_param
, this makeshandler_base
a better home for the verification function. so toprepare for the change, let's move this free function into handler_base.
also, let's mark
_mandatory_param
private, allows us to store thetyping of the params into
_mandatory_param
. as this variable shouldnot be visible from the outer world. and the typing information should
be opaque from the caller.
Refs #2082
Signed-off-by: Kefu Chai [email protected]