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From David Reiss <dre...@facebook.com>
Subject Re: JSONProtocol: wrong MessageType on Exceptions?
Date Fri, 04 Jun 2010 17:35:27 GMT
T_EXCEPTION is only used when the server sends a TApplicationException,
which happens when it cannot understand the request or has an unexpected
problem processing it.  For normal user-defined exceptions, the T_REPLY
value is used and the response indicates what the result was.

--David

Roger Meier wrote:
> Hi all
> 
> I did some tests with THttpServer.cpp, JavaScript langiage binding and 
> Tutorial-CppServer using the JSON protocol. I have a strange behavior, 
> that I do not understand.
> 
> Inside the JSON protocol, the MessageType for exceptions seems to be 2 
> instead of 3, see below.
> 
> What do I not understand here?
> 
> Regards
> 
> Roger
> 
> 
> -----------------------------
> 
> Request:
> [1,"calculate",1,0,{"1":{"i32":1},"2":{"rec":{"1":{"i32":1},"2":{"i32":0},"3":{"i32":4}}}}]
> 
> Response:
> [1,"calculate",2,0,{"1":{"rec":{"1":{"i32":4},"2":{"str":"Cannot divide 
> by 0"}}}}]
> 
> 
> enum TMessageType {
>    T_CALL       = 1,
>    T_REPLY      = 2,
>    T_EXCEPTION  = 3,
>    T_ONEWAY     = 4
> };
> 

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