Strange encoding of client.fields when accessing from api. about impress HOT 1 CLOSED

$(document).on('click', '#menuPostJSON', function() {
    var parameterName = 'paramaterValue';
    panelCenter.empty().html('<div class="progress"></div>');
    $.post(
        '/examples/simple/jsonPost.json',
        { parameterName: parameterName },
        function(res) {
            panelCenter.html('<pre>'+JSON.stringify(res, null, 2)+'</pre>');
        }
    );
});

module.exports = function(client, callback) {
    application.requestCounter = application.requestCounter || 0;
    console.dir(client.fields);
    callback({
        status: 1,
        parameterValue: client.fields.parameterName,
        valueLength:    client.fields.parameterName.length,
        requestCounter: application.requestCounter++
    });
}

{ parameterName: 'paramaterValue' }