Merge pull request #2 from jaiakash/restApi

jwt added

Author: jaiakash

spring-boot-jwt/pom.xml

@@ -27,13 +27,9 @@
 		<url/>
 	</scm>
 	<properties>
-		<java.version>22</java.version>
+		<java.version>17</java.version>
 	</properties>
 	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-security</artifactId>
-		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
@@ -45,9 +41,14 @@
 			<scope>test</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.springframework.security</groupId>
-			<artifactId>spring-security-test</artifactId>
-			<scope>test</scope>
+        <groupId>io.jsonwebtoken</groupId>
+        <artifactId>jjwt</artifactId>
+        <version>0.9.1</version>
+    	</dependency>
+		<dependency>
+		<groupId>javax.xml.bind</groupId>
+		<artifactId>jaxb-api</artifactId>
+		<version>2.3.1</version>
 		</dependency>
 	</dependencies>
 

spring-boot-jwt/src/main/java/com/akash/springboot/jwt/JwtUtil.java

@@ -0,0 +1,35 @@
+package com.akash.springboot.jwt;
+
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.SignatureAlgorithm;
+import io.jsonwebtoken.SignatureException;
+
+import org.springframework.stereotype.Component;
+
+import java.io.UnsupportedEncodingException;
+import java.util.Date;
+
+@Component
+public class JwtUtil {
+
+    private static final String SECRET_KEY = "secret_key";
+
+    public String generateToken(String username) throws UnsupportedEncodingException {
+        return Jwts.builder()
+                .setIssuer("spring-boot-jwt")
+                .setSubject(username)
+                .setIssuedAt(new Date())
+                .setExpiration(new Date(System.currentTimeMillis() + 86400000)) // 1 day expiration
+                .signWith(SignatureAlgorithm.HS256, SECRET_KEY)
+                .compact();
+    }
+
+    public boolean validateToken(String token) {
+        try {
+            Jwts.parser().setSigningKey(SECRET_KEY).parseClaimsJws(token);
+            return true;
+        } catch (SignatureException e) {
+            return false;
+        }
+    }
+}

spring-boot-jwt/src/main/java/com/akash/springboot/jwt/UserController.java

@@ -1,8 +1,11 @@
 package com.akash.springboot.jwt;
 
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.io.UnsupportedEncodingException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -12,18 +15,30 @@ public class UserController {
 
     private Map<String, String> users = new HashMap<>();
 
+    @Autowired
+    private JwtUtil jwtUtil;
+
+    @GetMapping("/")
+	public String index() {
+		return "Greetings from Spring Boot!";
+	}
+
     @PostMapping("/login")
     public ResponseEntity<?> login(@RequestBody Map<String, String> user) {
         String username = user.get("username");
         String password = user.get("password");
         users.put(username, password);
 
-        // TODO: Generate JWT token
+        try {
+           String token = jwtUtil.generateToken(username);            Map<String, String> response = new HashMap<>();
+            response.put("token", token);
+            System.err.println(token);
+            return new ResponseEntity<>(response, HttpStatus.OK);
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
 
-        Map<String, String> response = new HashMap<>();
-        response.put("token", "demo-token");
-
-        return ResponseEntity.ok(response);
+        return new ResponseEntity<>("Invalid user", HttpStatus.UNAUTHORIZED);
     }
 
 
@@ -32,11 +47,11 @@ public ResponseEntity<?> tokenAuthentication(@RequestBody Map<String, String> re
         String token = request.get("token");
 
         //TODO: Validate token
-        boolean isValid = true;
+        boolean isValid = jwtUtil.validateToken(token);
 
         Map<String, Boolean> response = new HashMap<>();
         response.put("isValid", isValid);
-
-        return ResponseEntity.ok(response);
+        System.err.println(isValid);
+        return new ResponseEntity<>(response, HttpStatus.OK);
     }
 }

spring-boot-jwt/src/main/java/com/akash/springboot/jwt/tempCodeRunnerFile.java

@@ -0,0 +1 @@
+package com.akash.springboot.jwt;

spring-boot-jwt/src/main/resources/application.properties

@@ -1 +1,2 @@
+server. Port=8080
 spring.application.name=springboot.jwt