Azure Function Forwarding Message to Azure App Service

index.js

const https = require('https');

module.exports = function (context, req) {
    // Obtain message from request.
    const post_data = JSON.stringify(req.body);
    // Obtain token from request.
    // Required to forward to bot.
    const authorization = req.headers.authorization; 
    
    const post_options = {
        host: 'botservicetest.azurewebsites.net',
        port: '443',
        path: '/api/messages',
        method: 'POST',
        headers: {
            'content-type': 'application/json',
            'content-length': Buffer.byteLength(post_data),
            'authorization': authorization
        }
    };

    const post_req = https.request(post_options);

    // Post the data
    post_req.write(post_data);

    post_req.on('error', (e) => {
        context.log(e);
    });

    post_req.end();

    context.done();
};