These notes accompany my builds of the projects from Node.js Essential Training on Lynda.com. My repo for these projects can be found here.
This folder contains projects to illustrate the basic functionality of Node.js built in http module.
To run the server
node request.jsExecutes
var https = require("https");
var fs = require("fs");
var options = {
hostname: "en.wikipedia.org",
port: 443,
path: "/wiki/George_Washington",
method: "GET"
};
var req = https.request(options, function(res) {
var responseBody = "";
console.log("Response from server started.");
console.log(`Server Status: ${res.statusCode} `);
console.log("Response Headers: %j", res.headers);
res.setEncoding("UTF-8");
res.once("data", function(chunk) {
console.log(chunk);
});
res.on("data", function(chunk) {
console.log(`--chunk-- ${chunk.length}`);
responseBody += chunk;
});
res.on("end", function() {
fs.writeFile("george-washington.html", responseBody, function(err) {
if (err) {
throw err;
}
console.log("File Downloaded");
});
});
});
req.on("error", function(err) {
console.log(`problem with request: ${err.message}`);
});
req.end();
To run the server
node server.jsserver.js
var http = require("http");
var server = http.createServer(function(req, res) {
res.writeHead(200, {"Content-Type": "text/html"});
res.end(`
<!DOCTYPE html>
<html>
<head>
<title>HTML Response</title>
</head>
<body>
<h1>Serving HTML Text</h1>
<p>${req.url}</p>
<p>${req.method}</p>
</body>
</html>
`);
});
server.listen(3000);
console.log("Server listening on port 3000");The page is served and two variables available to the node.js are printed to the screen.
<p>${req.url}</p>
<p>${req.method}</p>To run the server
node fileserver.jsa simple fileserver
var http = require("http");
var fs = require("fs");
var path = require("path");
http.createServer(function(req, res) {
console.log(`${req.method} request for ${req.url}`);
if (req.url === "/") {
fs.readFile("./public/index.html", "UTF-8", function(err, html) {
res.writeHead(200, {"Content-Type": "text/html"});
res.end(html);
});
} else if (req.url.match(/.css$/)) {
var cssPath = path.join(__dirname, 'public', req.url);
var fileStream = fs.createReadStream(cssPath, "UTF-8");
res.writeHead(200, {"Content-Type": "text/css"});
fileStream.pipe(res);
} else if (req.url.match(/.jpg$/)) {
var imgPath = path.join(__dirname, 'public', req.url);
var imgStream = fs.createReadStream(imgPath);
res.writeHead(200, {"Content-Type": "image/jpeg"});
imgStream.pipe(res);
} else {
res.writeHead(404, {"Content-Type": "text/plain"});
res.end("404 File Not Found");
}
}).listen(3000);
console.log("File server running on port 3000");To run the server
node api.jsA simple json api
var http = require("http");
var data = require("./data/inventory");
http.createServer(function(req, res) {
if (req.url === "/") {
res.writeHead(200, {"Content-Type": "text/json"});
res.end(JSON.stringify(data));
} else if (req.url === "/instock") {
listInStock(res);
} else if (req.url === "/onorder") {
listOnBackOrder(res);
} else {
res.writeHead(404, {"Content-Type": "text/plain"});
res.end("Whoops... Data not found");
}
}).listen(3000);
console.log("Server listening on port 3000");
function listInStock(res) {
var inStock = data.filter(function(item) {
return item.avail === "In stock";
});
res.end(JSON.stringify(inStock));
}
function listOnBackOrder(res) {
var onOrder = data.filter(function(item) {
return item.avail === "On back order";
});
res.end(JSON.stringify(onOrder));
}To run the server
node formserver.jsHandle a POST request
var http = require("http");
var fs = require("fs");
http.createServer(function(req, res) {
if (req.method === "GET") {
res.writeHead(200, {"Content-Type": "text/html"});
fs.createReadStream("./public/form.html", "UTF-8").pipe(res);
} else if (req.method === "POST") {
var body = "";
req.on("data", function(chunk) {
body += chunk;
});
req.on("end", function() {
res.writeHead(200, {"Content-Type": "text/html"});
res.end(`
<!DOCTYPE html>
<html>
<head>
<title>Form Results</title>
</head>
<body>
<h1>Your Form Results</h1>
<p>${body}</p>
</body>
</html>
`);
});
}
}).listen(3000);
console.log("Form server listening on port 3000");Httpster is a web server that will serve static content.
Install Httpster
npm install - g httpsterRun httpster and give it a port flag and give it a directory to serve.
httpster -p 8080 -d ./publicTry this:
Run
which httpsterreturns
/usr/local/bin/httpsterThis is where the httpster executable files is located when it is installed globally. When a node module is installed globally the executable file is linked automatically so that terminal is aware of its location. So to run the executable you can simply call it by name.
httpster -p 8080 -d ./publicNow, remove httpster global install.
npm remove -g httpsterNow install it locally
npm install httpsterThis creates a node_modules folder with httpster installed there.
Try to run httpster
httpster -p 8080 -d ./publicThe httpster executable cannot be found.
-bash: /usr/local/bin/httpster: No such file or directoryTo run it you need to specify the executable's location.
./node_modules/httpster/bin/httpster -p 8080 -d ./publicThis applies to all node modules
npm installnode appThe app server serves your application files from the public folder on port 3000.
node-dev app.jsnode-dev will reload the express server any time you make changes to app-server.js. (N.B. - it doesn't restart the browser, just the server.)
The app server serves your application files from the public folder on port 3000.
See the readme file in the app folder...
See project folder for detailed readme...
See project folder for detailed readme...