add tls option to logger example

Author: tewarid

.eslintrc.json

@@ -1,6 +1,6 @@
 {
     "parserOptions": {
-        "ecmaVersion": 5
+        "ecmaVersion": 6
     },
     "plugins": [
         "security"

examples/logger/index.js

@@ -1,31 +1,49 @@
 var proxy = require("node-tcp-proxy");
 var util = require("util");
 var replace = require('buffer-replace');
+var argv = require("commander");
 
-var serviceHosts = ["apache.org", "apache.org"];
-var servicePorts = [80, 80];
+argv
+    .usage("[options]")
+    .option("--tls", "Use TLS 1.2; ", false)
+    .parse(process.argv);
 
-var newProxy = proxy.createProxy(8080, serviceHosts, servicePorts, {
+var PROXY_HOST = "localhost";
+var PROXY_PORT = "8080";
+var SERVICE_HOST = "www.baidu.com";
+var SERVICE_PORT = argv.tls ? 443: 80;
+
+var serviceHosts = [SERVICE_HOST, SERVICE_HOST];
+var servicePorts = [SERVICE_PORT, SERVICE_PORT];
+
+var options = {
     upstream: function(context, data) {
         log(context.proxySocket, data);
-        data = replace(data, "localhost:8080", "apache.org");
+        data = replace(data, `${PROXY_HOST}:${PROXY_PORT}`, SERVICE_HOST);
         return data;
     },
     downstream: function(context, data) {
         log(context.serviceSocket, data);
-        data = replace(data, "apache.org", "localhost:8080");
+        data = replace(data, SERVICE_HOST, `${PROXY_HOST}:${PROXY_PORT}`);
         return data;
     },
     serviceHostSelected: function(proxySocket, i) {
         console.log(util.format("Service host %s:%s selected for client %s:%s.",
-            serviceHosts[i],
-            servicePorts[i],
+            serviceHosts[parseInt(i)],
+            servicePorts[parseInt(i)],
             proxySocket.remoteAddress,
             proxySocket.remotePort));
         // use your own strategy to calculate i
         return i;
     }
-});
+};
+
+if (argv.tls) {
+    options.tls = "both";
+}
+
+var newProxy = proxy
+    .createProxy(PROXY_PORT, serviceHosts, servicePorts, options);
 
 function log(socket, data) {
     console.log(util.format("%s:%s sent:",
@@ -36,6 +54,12 @@ function log(socket, data) {
 
 console.log("Open http://localhost:8080 in the browser.");
 
+if (argv.tls) {
+    console.log("TLS 1.2 is enabled.");
+} else {
+    console.log("Specify --tls in command line if you want to use TLS 1.2.");
+}
+
 console.log("press Enter key to quit...");
 setTimeout(handleTimeout, 1000);
 function handleTimeout() {