postal.js/example/node/messaging/postal.diagnostics.js

var _ = require('underscore');

module.exports = function(postal) {
	
		// this returns a callback that, if invoked, removes the wireTap
		postal.diagnostics = postal.addWireTap(function(data, envelope) {
			var all = _.extend(envelope, { data: data });
			if(!JSON) {
				throw "This browser or environment does not provide JSON support";
			}
			try {
				console.log(JSON.stringify(all));
			}
			catch(exception) {
				try {
					all.data = "ERROR: " + exception.message;
					console.log(JSON.stringify(all));
				}
				catch(ex) {
					console.log("Unable to parse data to JSON: " + exception);
				}
			}
		});
	
};