Reject dup keys

[cdunn2001]

https://sourceforge.net/p/jsoncpp/bugs/22/

Sekhar (shakers007) wrote:

As per RFC4627 (section 2.2), names within an object should be unique. When using JSONCPP's strict mode, parsing such an object should fail.
As of now, JSONCPP does not return an error:

Sample JSON (duplicate_key.json):

{
  "Object": {
    "Key":"Value",
    "Key":"Value"}
}

Sample code to test the above file:

ifstream inFile("duplicate_key.json");
Json::Value root;
Json::Reader reader(Json::Features::strictMode());
if ( false==reader.parse( inFile, root, false ) )
{
  cerr << "Error reading file " << reader.getFormatedErrorMessages() << endl;
}
cout << root["Object"] << endl;

Output:

{
  "Key" : "Value"
}