2021-08-05

json-web-token/build.gradle.kts

@@ -0,0 +1,19 @@
+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+plugins {
+    id("elex-java")
+}
+
+dependencies {
+    // https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt-api
+    implementation("io.jsonwebtoken:jjwt-api:0.11.2")
+
+    // https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt-impl
+    runtimeOnly("io.jsonwebtoken:jjwt-impl:0.11.2")
+    runtimeOnly("io.jsonwebtoken:jjwt-jackson:0.11.2")
+}

json-web-token/src/main/java/kr/pe/elex/examples/JwtSample.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import io.jsonwebtoken.*;
+import io.jsonwebtoken.security.InvalidKeyException;
+import io.jsonwebtoken.security.Keys;
+import io.jsonwebtoken.security.SignatureException;
+
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.Date;
+import java.util.Random;
+
+public class JwtSample {
+	private static final byte[] key;
+
+	static {
+		key = new byte[32];
+		new Random().nextBytes(key);
+	}
+
+	public static String generateToken() throws InvalidKeyException {
+		return Jwts.builder()
+				.setHeaderParam(Header.TYPE, Header.JWT_TYPE)
+				.setIssuer("Elex")
+				.setExpiration(Date.from(Instant.now().plus(3, ChronoUnit.HOURS)))
+				.claim("userId", 3)
+				.signWith(Keys.hmacShaKeyFor(key))
+				.compact();
+	}
+
+	public static Jws<Claims> parseToken(final String token)
+			throws UnsupportedJwtException, MalformedJwtException, SignatureException, ExpiredJwtException {
+
+		return Jwts.parserBuilder()
+				.setSigningKey(key)
+				.build()
+				.parseClaimsJws(parseHeader(token));
+	}
+
+	private static String parseHeader(final String authenticationHeader) {
+		final String[] authentication = authenticationHeader.split(" ");
+		if (authentication.length == 2 && authentication[0].matches("[bB]earer")) {
+			return authentication[1];
+		} else if (authentication.length == 1) {
+			return authentication[0];
+		} else {
+			throw new MalformedJwtException("Authentication Header param must be started with 'Bearer ': " + authenticationHeader);
+		}
+	}
+
+	public static void main(String... args) {
+		String token = generateToken();
+		System.out.println(token);
+
+		String authHeader = "Bearer " + token;
+		Jws<Claims> claims = parseToken(authHeader);
+		System.out.println(claims);
+	}
+}

json-web-token/src/main/java/kr/pe/elex/examples/package-info.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;

json-web-token/src/test/java/kr/pe/elex/examples/SampleTest.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Base64;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SampleTest {
+
+	@Test
+	void test(){
+		System.out.println(new String());
+	}
+}