Re: [Cppcms-users] CppCMS 1.x.x JSON object value empty/not exist

[Artyom <art...@ya...>]

BTW I forgot to mention, cppcms provides built-in JSON-RPC facilities:

See: 
  http://art-blog.no-ip.info/cppcms_ref_v0_99_1/classcppcms_1_1rpc_1_1json__rpc__server.html 

And a simple example in "tests/jsonrpc_test.cpp"

Artyom





________________________________
From: Geert Van de Velde <gee...@ba...>
To: cpp...@li...
Sent: Tue, June 15, 2010 4:54:38 PM
Subject: [Cppcms-users] CppCMS 1.x.x JSON object value empty/not exist

Hi,

I'm trying to use cppcms for a new project and use it for building a
RESTLike API for a device. The API will communicate with the JSON data
format.

When receiving JSON data from a client some fields of an object are
optional. I'm using json::value for handling this.
I use the get<T> function to fetch the fields but in case of a missing
field or invalid field data it throws an exception. Is it possible to
detect that the field is missing separately? So I can ignore missing
optional fields.

Tnx


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