relay-hybrid-connections-node-get-started-client.md

Create a Node.js application

• Create a new JavaScript file called sender.js.

Add the Relay NPM package

• Run npm install hyco-ws from a Node command prompt in your project folder.

Write some code to send messages

1. Add the following constants to the top of the sender.js file.

   const WebSocket = require('hyco-ws');
   const readline = require('readline')
       .createInterface({
           input: process.stdin,
           output: process.stdout
       });;

2. Add the following Relay constants to the sender.js for the Hybrid Connection connection details. Replace the placeholders in brackets with the proper values that were obtained when creating the Hybrid Connection.

   1. const ns - The Relay namespace (use FQDN - e.g. {namespace}.servicebus.windows.net)
   2. const path - The name of the Hybrid Connection
   3. const keyrule - The name of the SAS key
   4. const key - The SAS key value

3. Add the following code to the sender.js file:

   WebSocket.relayedConnect(
       WebSocket.createRelaySendUri(ns, path),
       WebSocket.createRelayToken('http://'+ns, keyrule, key),
       function (wss) {
           readline.on('line', (input) => {
               wss.send(input, null);
           });
   
           console.log('Started client interval.');
           wss.on('close', function () {
               console.log('stopping client interval');
               process.exit();
           });
       }
   );

   Here is what your listener.js should look like:

   const WebSocket = require('hyco-ws');
   const readline = require('readline')
       .createInterface({
           input: process.stdin,
           output: process.stdout
       });;
   
   const ns = "{RelayNamespace}";
   const path = "{HybridConnectionName}";
   const keyrule = "{SASKeyName}";
   const key = "{SASKeyValue}";
   
   WebSocket.relayedConnect(
       WebSocket.createRelaySendUri(ns, path),
       WebSocket.createRelayToken('http://'+ns, keyrule, key),
       function (wss) {
           readline.on('line', (input) => {
               wss.send(input, null);
           });
   
           console.log('Started client interval.');
           wss.on('close', function () {
               console.log('stopping client interval');
               process.exit();
           });
       }
   );