How to use "require" in a module?

mbalfour

I’m trying to make my first module. A pretty simple one, I just want to display the IP address of my Raspberry Pi. (I’m not assigning it a static addr, so if it changes I’d like to know the new addr to remote into)

A quick google turned up some code for querying for your local IP address. However, it’s not working. I’m getting “Uncaught ReferenceError: require is not defined”. Am I missing something silly here? (Yes, I know the actual ip-getting code is commented out, I’ll bring it back once I can get the reference to os working)

Here’s the code:

var os = require("os");
Module.register("my_ip", {

    // Default module config.
	defaults: {
	},

    // Override dom generator.
	getDom: function () {
	    var ip = location.host;

	    /*
	    var ifaces = os.networkInterfaces();

	    Object.keys(ifaces).forEach(function (ifname) {
	        var alias = 0;

	        ifaces[ifname].forEach(function (iface) {
	            if ('IPv4' !== iface.family || iface.internal !== false) {
	                // skip over internal (i.e. 127.0.0.1) and non-ipv4 addresses
	                return;
	            }

	            if (alias >= 1) {
	                // this single interface has multiple ipv4 addresses
	                console.log(ifname + ':' + alias, iface.address);
                    ip = iface.address;
	            } else {
	                // this interface has only one ipv4 adress
	                console.log(ifname, iface.address);
                    ip = iface.address;
	            }
	            ++alias;
	        });
	    });
        */

	    var wrapper = document.createElement("div");
	    wrapper.innerHTML = ip;
		return wrapper;
	},

});

strawberry 3.141

take a look into the documentation on how to write a module, especially the part with node_helper

mbalfour

Thanks! I’ve got it working with node_helper now. It seems a bit convoluted though, since my module now sends a socket notification to request the IP, and listens for the socket notification to refresh the local variable and redraw the DOM. Is this actually the correct way to do it?

KirAsh4

That’s how the node_helper method works, module sends a request, the node_helper.js script responds.