How to send an image to a WhatsApp group in Node.js

This article shows you how to send an image to a WhatsApp group in Node.js (JavaScript).

To send an image in to a WhatsApp group in Node.js, do this:

1. First, learn how to send a simple text message on the official site.
2. With the above knowledge, you can now download our sample code.
3. Locate the file nodejs/send-image-group.js.

   	#!/usr/bin/env node
   	var http = require('http');
   	var fs = require('fs');
   	// TODO Put down your own client ID and secret here:
   	var instanceId = "YOUR_OWN_GATEWAY_INSTANCE_ID";
   	var clientId = "YOUR_OWN_CLIENT_ID";
   	var clientSecret = "YOUR_OWN_SECRET_ID";
   	var jsonPayload = JSON.stringify({
   	group_name: "YOUR UNIQUE GROUP NAME HERE", // FIXME
   	image: fs.readFileSync("../assets/cute-girl.jpg").toString('base64'), // FIXME
   	caption: "Lovely Gal" // FIXME
   	});
   	var options = {
   	hostname: "api.whatsmate.net",
   	port: 80,
   	path: "/v3/whatsapp/group/image/message/" + instanceId,
   	method: "POST",
   	headers: {
   	"Content-Type": "application/json",
   	"X-WM-CLIENT-ID": clientId,
   	"X-WM-CLIENT-SECRET": clientSecret,
   	"Content-Length": Buffer.byteLength(jsonPayload)
   	}
   	};
   	var request = new http.ClientRequest(options);
   	request.end(jsonPayload);
   	request.on('response', function (response) {
   	console.log('Heard back from WhatsMate WhatsApp Gateway:\n');
   	console.log('Status code: ' + response.statusCode);
   	response.setEncoding('utf8');
   	response.on('data', function (chunk) {
   	console.log(chunk);
   	});
   	});

   view raw send-image-group.js hosted with ❤ by GitHub
4. Study the Node.js source code and customize the TODO/FIXME lines.
   • Among other things, you must name your group creatively. Otherwise, the group may not receive the message.
5. Change to the directory containing the script: cd nodejs
6. Run the script to send your group the first image: ./send-image-group.js

Happy coding :)