Node JS:101

MEAN Node JS: Web Server Part Creating a Simple Web Server var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World How are you !'); }).listen(8080,'localhost'); Executing the above code in Node will create a web server and when you will send the request to server using a browser it … Continue reading Node JS:101 →

NodeJs: HTTP Request – Response to REST API

Sending HTTP GET/POST Request and Response using Node JS. Code: var https = require("https"); exports.handler = (events,context,callback) => { var options = { host : 'hostname', port : '443', path : 'ifany', headers: { 'Authorization' : 'Basic' + new Buffer("username" + ':' + "password").toString('base64') } }; // request request = https.get(options, function(res){ var body = … Continue reading NodeJs: HTTP Request – Response to REST API →

Dynamic String Conversion in JAVA

Input: 2B Output: 2000000000 Code : import java.math.BigDecimal; import java.util.Scanner; public class DyanamicConversion { public static void main(String args[]){ //Scanner scan = new Scanner(System.in); String a ="2M"; String[][] conversion = {{"K","1000"},{"M","1000000"},{"B","1000000000"}}; for(int i=0;i<conversion.length;i++){ if(a.endsWith(conversion[i][0])){ BigDecimal temp = new BigDecimal(a.substring(0, a.indexOf(conversion[i][0]))); temp.multiply(new BigDecimal(conversion[i][1])); a = temp.toBigInteger().toString(); System.out.println(a); break; } } } }

Sending HTTP GET Request to a REST API in JAVA

HTTP/HTTPS Get/Post request /response using JAVA below. For detailed visit here: https://www.mkyong.com/java/how-to-send-http-request-getpost-in-java/ Code: import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URL; import javax.net.ssl.HttpsURLConnection; public class HttpURLConnection { public static void main(String[] args) throws IOException { String response = httpGet("https://services.groupkt.com/state/get/IND/all"); } public static String httpGet(String urlStr) throws IOException { URL obj = new URL(urlStr); HttpsURLConnection con … Continue reading Sending HTTP GET Request to a REST API in JAVA →

Parsing JSON Output using JAVA

Use the JSONParser methods to parse a response that's returned from a call to an external service that is in JSON format, such as a JSON-encoded response of a Web service callout. Here is the code to parse the JSON string using JAVA: 1 2 3 4 5 6 7 8 9 10 11 12 … Continue reading Parsing JSON Output using JAVA →

Understanding Spring MVC project setup

Flow Diagram of Spring MVC Img Source: TutorialsPoint Purpose of web.xml Until Spring 3.1 the only way to configure the DispatcherServlet was with the WEB-INF/web.xml file. servlet name is dispatcher an instance of DispatcherServlet Class Will be initialized with a parameter named contextConfigLocation which contains the path to the configuration XML load-on-startup is an integer … Continue reading Understanding Spring MVC project setup →

Spring MVC Project: Setup

Software Requirements Eclipse Mars 2 Java, jdk 1.6 and above Spring 4 jar files(download) Apache Tomcat 7 Step 1: Create a Dynamic Web Project(File>New>Dynamic Web Project) Step 2: Create project folder and packages as shown below Step 3: Add required Spring MVC libs Step 4: Add following code in web.xml Step 5: Add following code … Continue reading Spring MVC Project: Setup →

BUILDING CHAT BOTs: MICROSOFT QnA MAKER

To find about What are Chat Bots? visit here. According to Microsoft’s documentation, “Microsoft QnA Maker is a free, easy-to-use, REST API and web-based service that trains AI to respond to user’s questions in a more natural, conversational way. Compatible across development platforms, hosting services, and channels, QnA Maker is the only question and answer service with a graphical user … Continue reading BUILDING CHAT BOTs: MICROSOFT QnA MAKER →