Start https://www.w3schools.com/nodejs

Author: fazl

nodejs/first/myfirst.js

@@ -0,0 +1,43 @@
+/*
+You can run this as a server application with node, thus:
+
+node myfirst.js
+
+Then you can access it over http by opening the url http://localhost:8080 in your browser
+
+This gets a page with:
+
+Hello Javascript Server world!
+
+Note: if you try using https you may see this:
+Error code: SSL_ERROR_RX_RECORD_TOO_LONG
+*/
+
+var http = require('http');
+
+var msg = 'Hello Javascript Server world!'; 
+
+/*
+var handler = function(req, res){
+    console.log('req.url=' + req.url);
+    if(req.url === '/favicon.ico') {
+        console.log('Favicon was requested');
+    }
+        console.log('Sending response: '+msg);
+        res.writeHead(200, {'Content-Type' : 'text/html'});
+        res.end(msg);
+}
+*/
+
+http.createServer(function(req, res){
+        console.log('req.url=' + req.url);
+        if(req.url === '/favicon.ico') {
+            // chrome has a bug, calls url again for favicon..
+            console.log('Favicon was requested');
+        }
+        console.log('Sending response: '+msg);
+        res.writeHead(200, {'Content-Type' : 'text/html'});
+        res.end(msg);
+}).listen(8080);
+
+

nodejs/first/myfirstmodule.js

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+
+exports.myDateTime = function(){
+
+    var d = Date();
+    console.log('myDateTime : ' + d);
+    return d;
+    
+}

nodejs/first/myhttps.js

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+var https = require('https');
+
+// This does NOT work just out of the box.. 
+// Docs at https://www.w3schools.com/nodejs/ref_https.asp MISLEADING
+//
+https.createServer(function (req, res) {
+    res.writeHead(200, {'Content-Type': 'text/plain'});
+    res.write('Hello World!');
+    res.end();
+}).listen(8080);

nodejs/first/mymodular.js

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+// See myfirst.js for intro
+
+var http = require('http');
+var url = require('url');
+var mymodule = require('./myfirstmodule');
+
+/*  This error appears when there is no matching module file 
+    Note the actual line 4 is mentioned TWELVE LINES into the output!
+    
+C:\dev\nodejs\first>node mymodular.js
+internal/modules/cjs/loader.js:985
+  throw err;
+  ^
+
+Error: Cannot find module './myfirstmodule'
+Require stack:
+- C:\dev\nodejs\first\mymodular.js
+    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:982:15)
+    at Function.Module._load (internal/modules/cjs/loader.js:864:27)
+    at Module.require (internal/modules/cjs/loader.js:1044:19)
+    at require (internal/modules/cjs/helpers.js:77:18)
+    at Object.<anonymous> (C:\dev\nodejs\first\mymodular.js:4:16)*/
+
+var hello = 'Modular Javascript Server world! '; 
+
+http.createServer(function(req, res){
+        console.log('req.url=' + req.url);
+        if(req.url === '/favicon.ico') {
+            // chrome has a bug, calls url again for favicon..
+            console.log('Favicon was requested');
+        }
+        var msg = req.url + ' requested at: <br>' + mymodule.myDateTime();
+        console.log('Sending response: '+msg);
+        res.writeHead(200, {'Content-Type' : 'text/html', 'connection':'close'});
+        res.end(msg);
+}).listen(8080);
+
+