.

Author: pirple-author

Section 2/Anatomy of a Node Application/index.js

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+/*
+ * Title: Basic Node Example
+ * Description: Simple file that declares a few functions and invokes them.
+ * Author: Leslie Lewis
+ * Date: 10/24/17
+ *
+ */
+
+
+// Dependencies
+var mathLib = require('./lib/math');
+var jokesLib = require('./lib/jokes');
+
+
+// App object
+var app = {};
+
+
+// Configuration
+app.config = {
+    'timeBetweenJokes' : 1000
+};
+
+
+// Function that prints a random joke
+app.printAJoke = function(){
+
+    // Get all the jokes
+    var allJokes = jokesLib.allJokes();
+
+    // Get the length of the jokes
+    var numberOfJokes = allJokes.length;
+
+    // Pick a random number between 1 and the number of jokes
+    var randomNumber = mathLib.getRandomNumber(1,numberOfJokes);
+
+    // Get the joke at that position in the array (minus one)
+    var selectedJoke = allJokes[randomNumber - 1];
+
+    // Send the joke to the console
+    console.log(selectedJoke);
+};
+
+
+// Function that loops indefinitely, calling the printAJoke function as it goes
+app.indefiniteLoop = function(){
+
+    // Create the interval, using the config variable defined above
+    setInterval(app.printAJoke,app.config.timeBetweenJokes);
+};
+
+
+// Invoke the loop
+app.indefiniteLoop();

Section 2/Anatomy of a Node Application/lib/jokes/index.js

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+/*
+ * Title: Jokes Library
+ * Description: Utility library for getting a list of Jokes
+ * Author: Leslie Lewis
+ * Date: 10/24/17
+ *
+ */
+
+
+// Dependencies
+var fs = require('fs');
+
+// App object
+var jokes = {};
+
+// Get all the jokes and return them to the user
+jokes.allJokes = function(){
+
+    // Read the text file containing the jokes
+    var fileContents = fs.readFileSync(__dirname+'/jokes.txt', 'utf8');
+
+    // Turn the string into an array 
+    var arrayOfJokes = fileContents.split(/\r?\n/);
+
+    // Return the array
+    return arrayOfJokes;
+
+};
+
+// Export the library
+module.exports = jokes;

Section 2/Anatomy of a Node Application/lib/jokes/jokes.txt

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+Why should you avoid the duck psychologist? He's a quack.
+What do cows do in their spare time? Go to the moooovies.
+Why do birds hate Instagram? They prefer to tweet.
+Where do fish keep all their money? The river bank.
+Why did the sheep get detention? It was baaaaaad.
+Why couldn't the horse congress pass any bills? They all kept voting naaaaaay.

Section 2/Anatomy of a Node Application/lib/math.js

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+/*
+ * Title: Math Library
+ * Description: Utility library for math-related functions
+ * Author: Leslie Lewis
+ * Date: 10/24/17
+ *
+ */
+
+
+// App object
+var math = {};
+
+// Get a random integer between two integers
+// Inspired by: http://stackoverflow.com/questions/4959975/generate-random-number-between-two-numbers-in-javascript
+math.getRandomNumber = function(min,max){
+    min = typeof(min) == 'number' && min % 1 === 0 ? min : 0;
+    max = typeof(max) == 'number' && max % 1 === 0 ? max : 0;
+    return Math.floor(Math.random()*(max-min+1)+min);
+};
+
+
+// Export the library
+module.exports = math;

Section 2/Common Node Conventions/.npmrc

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+//registry.npmjs.org/:_authToken=xxxxx-xxxxx-xxxxx-xxxx-xxxxxxxxxxxxx

Section 2/Common Node Conventions/index.js

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+/*
+ * Title: Basic Node Example
+ * Description: Simple file that declares a few functions and invokes them.
+ * Author: Leslie Lewis
+ * Date: 10/24/17
+ *
+ */
+
+
+// Dependencies
+var mathLib = require('./lib/math');
+var jokesLib = require('./lib/jokes');
+
+
+// App object
+var app = {};
+
+
+// Configuration
+app.config = {
+    'timeBetweenJokes' : 1000
+};
+
+
+// Function that prints a random joke
+app.printAJoke = function(){
+
+    // Get all the jokes
+    var allJokes = jokesLib.allJokes();
+
+    // Get the length of the jokes
+    var numberOfJokes = allJokes.length;
+
+    // Pick a random number between 1 and the number of jokes
+    var randomNumber = mathLib.getRandomNumber(1,numberOfJokes);
+
+    // Get the joke at that position in the array (minus one)
+    var selectedJoke = allJokes[randomNumber - 1];
+
+    // Send the joke to the console
+    console.log(selectedJoke);
+};
+
+
+// Function that loops indefinitely, calling the printAJoke function as it goes
+app.indefiniteLoop = function(){
+
+    // Create the interval, using the config variable defined above
+    setInterval(app.printAJoke,app.config.timeBetweenJokes);
+};
+
+
+// Invoke the loop
+app.indefiniteLoop();

Section 2/Common Node Conventions/lib/jokes/index.js

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+/*
+ * Title: Jokes Library
+ * Description: Utility library for getting a list of Jokes
+ * Author: Leslie Lewis
+ * Date: 10/24/17
+ *
+ */
+
+
+// Dependencies
+var fs = require('fs');
+
+// App object
+var jokes = {};
+
+// Get all the jokes and return them to the user
+jokes.allJokes = function(){
+
+    // Read the text file containing the jokes
+    var fileContents = fs.readFileSync(__dirname+'/jokes.txt', 'utf8');
+
+    // Turn the string into an array 
+    var arrayOfJokes = fileContents.split(/\r?\n/);
+
+    // Return the array
+    return arrayOfJokes;
+
+};
+
+// Export the library
+module.exports = jokes;

Section 2/Common Node Conventions/lib/jokes/jokes.txt

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+Why should you avoid the duck psychologist? He's a quack.
+What do cows do in their spare time? Go to the moooovies.
+Why do birds hate Instagram? They prefer to tweet.
+Where do fish keep all their money? The river bank.
+Why did the sheep get detention? It was baaaaaad.
+Why couldn't the horse congress pass any bills? They all kept voting naaaaaay.

Section 2/Common Node Conventions/lib/math.js

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+/*
+ * Title: Math Library
+ * Description: Utility library for math-related functions
+ * Author: Leslie Lewis
+ * Date: 10/24/17
+ *
+ */
+
+
+// App object
+var math = {};
+
+// Get a random integer between two integers
+// Inspired by: http://stackoverflow.com/questions/4959975/generate-random-number-between-two-numbers-in-javascript
+math.getRandomNumber = function(min,max){
+    min = typeof(min) == 'number' && min % 1 === 0 ? min : 0;
+    max = typeof(max) == 'number' && max % 1 === 0 ? max : 0;
+    return Math.floor(Math.random()*(max-min+1)+min);
+};
+
+
+// Export the library
+module.exports = math;

Section 2/Common Node Conventions/package.json

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+{
+  "name": "basicExample",
+  "version": "0.0.1",
+  "license": "UNLICENSED",
+  "private": "true",
+  "description": "Simple file that declares a few functions and invokes them",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "jokes" : "0.1.3"
+  }
+}

Section 3/Adding Configuration/config.js

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+/*
+ * Create and export configuration variables
+ *
+ */
+
+// Container for all environments
+var environments = {};
+
+// Staging (default) environment
+environments.staging = {
+  'port' : 3000,
+  'envName' : 'staging'
+};
+
+// Production environment
+environments.production = {
+  'port' : 5000,
+  'envName' : 'production'
+};
+
+// Determine which environment was passed as a command-line argument
+var currentEnvironment = typeof(process.env.NODE_ENV) == 'string' ? process.env.NODE_ENV.toLowerCase() : '';
+
+// Check that the current environment is one of the environments above, if not default to staging
+var environmentToExport = typeof(environments[currentEnvironment]) == 'object' ? environments[currentEnvironment] : environments.staging;
+
+// Export the module
+module.exports = environmentToExport;

Section 3/Adding Configuration/index.js

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+/*
+ * Primary file for API
+ *
+ */
+
+// Dependencies
+var http = require('http');
+var url = require('url');
+var StringDecoder = require('string_decoder').StringDecoder;
+var config = require('./config');
+
+ // Configure the server to respond to all requests with a string
+var server = http.createServer(function(req,res){
+
+  // Parse the url
+  var parsedUrl = url.parse(req.url, true);
+
+  // Get the path
+  var path = parsedUrl.pathname;
+  var trimmedPath = path.replace(/^\/+|\/+$/g, '');
+
+  // Get the query string as an object
+  var queryStringObject = parsedUrl.query;
+
+  // Get the HTTP method
+  var method = req.method.toLowerCase();
+
+  //Get the headers as an object
+  var headers = req.headers;
+
+  // Get the payload,if any
+  var decoder = new StringDecoder('utf-8');
+  var buffer = '';
+  req.on('data', function(data) {
+      buffer += decoder.write(data);
+  });
+  req.on('end', function() {
+      buffer += decoder.end();
+
+      // Check the router for a matching path for a handler. If one is not found, use the notFound handler instead.
+      var chosenHandler = typeof(router[trimmedPath]) !== 'undefined' ? router[trimmedPath] : handlers.notFound;
+
+      // Construct the data object to send to the handler
+      var data = {
+        'trimmedPath' : trimmedPath,
+        'queryStringObject' : queryStringObject,
+        'method' : method,
+        'headers' : headers,
+        'payload' : buffer
+      };
+
+      // Route the request to the handler specified in the router
+      chosenHandler(data,function(statusCode,payload){
+
+        // Use the status code returned from the handler, or set the default status code to 200
+        statusCode = typeof(statusCode) == 'number' ? statusCode : 200;
+
+        // Use the payload returned from the handler, or set the default payload to an empty object
+        payload = typeof(payload) == 'object'? payload : {};
+
+        // Convert the payload to a string
+        var payloadString = JSON.stringify(payload);
+
+        // Return the response
+        res.setHeader('Content-Type', 'application/json');
+        res.writeHead(statusCode);
+        res.end(payloadString);
+        console.log("Returning this response: ",statusCode,payloadString);
+
+      });
+
+  });
+});
+
+// Start the server
+server.listen(config.port,function(){
+  console.log('The server is up and running on port '+config.port+' in '+config.envName+' mode.');
+});
+
+// Define all the handlers
+var handlers = {};
+
+// Sample handler
+handlers.sample = function(data,callback){
+    callback(406,{'name':'sample handler'});
+};
+
+// Not found handler
+handlers.notFound = function(data,callback){
+  callback(404);
+};
+
+// Define the request router
+var router = {
+  'sample' : handlers.sample
+};