baeldung-articles : BAEL-6484 (#16398)

* updating the pom.xml file

Here i add a new module networking-5

* baeldung-articles : BAEL-6484

Finding the Redirected URL of a URL in Java.

core-java-modules/core-java-networking-5/README.md

@@ -0,0 +1,2 @@
+## Relevant Articles:
+- [[<-- Prev]](/core-java-modules/core-java-networking-4)

core-java-modules/core-java-networking-5/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-networking-5</artifactId>
+    <packaging>jar</packaging>
+    <name>core-java-networking-5</name>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>commons-validator</groupId>
+            <artifactId>commons-validator</artifactId>
+            <version>${commons-validator.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jsoup</groupId>
+            <artifactId>jsoup</artifactId>
+            <version>${jsoup.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpclient</artifactId>
+            <version>${httpclient.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.ws.rs</groupId>
+            <artifactId>javax.ws.rs-api</artifactId>
+            <version>${javax.ws.rs-api.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.glassfish.jersey.core</groupId>
+            <artifactId>jersey-common</artifactId>
+            <version>${jersey-common.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${spring-web.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <commons-validator.version>1.7</commons-validator.version>
+        <jsoup.version>1.17.2</jsoup.version>
+        <httpclient.version>4.5.2</httpclient.version>
+        <javax.ws.rs-api.version>2.1.1</javax.ws.rs-api.version>
+        <jersey-common.version>2.22.2</jersey-common.version>
+        <spring-web.version>6.0.6</spring-web.version>
+    </properties>
+
+</project>

core-java-modules/core-java-networking-5/src/test/java/com/baeldung/redirectedurl/RedirectedUrlUnitTest.java

@@ -0,0 +1,57 @@
+package com.baeldung.redirectedurl;
+
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import static org.junit.Assert.assertEquals;
+
+public class RedirectedUrlUnitTest {
+    String canonicalUrl = "http://www.baeldung.com/";
+    String expectedRedirectedUrl = "https://www.baeldung.com/";
+
+    @Test
+    public void givenOriginalUrl_whenFindRedirectUrlUsingHttpURLConnection_thenCorrectRedirectedUrlReturned() throws IOException {
+        URL url = new URL(canonicalUrl);
+        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+        connection.setInstanceFollowRedirects(true);
+        int status = connection.getResponseCode();
+        String redirectedUrl = null;
+        if (status == HttpURLConnection.HTTP_MOVED_PERM || status == HttpURLConnection.HTTP_MOVED_TEMP) {
+            redirectedUrl = connection.getHeaderField("Location");
+        }
+        connection.disconnect();
+        assertEquals(expectedRedirectedUrl, redirectedUrl);
+    }
+
+    @Test
+    public void givenOriginalUrl_whenFindRedirectUrlUsingHttpClient_thenCorrectRedirectedUrlReturned() throws IOException {
+        RequestConfig config = RequestConfig.custom()
+                .setRedirectsEnabled(false)
+                .build();
+        try (CloseableHttpClient httpClient = HttpClients.custom()
+                .setDefaultRequestConfig(config)
+                .build()) {
+            HttpGet httpGet = new HttpGet(canonicalUrl);
+            try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
+                int statusCode = response.getStatusLine().getStatusCode();
+                String redirectedUrl = null;
+                if (statusCode == HttpURLConnection.HTTP_MOVED_PERM || statusCode == HttpURLConnection.HTTP_MOVED_TEMP) {
+                    org.apache.http.Header[] headers = response.getHeaders("Location");
+                    if (headers.length > 0) {
+                        redirectedUrl = headers[0].getValue();
+                    }
+                }
+                assertEquals(expectedRedirectedUrl, redirectedUrl);
+            }
+        }
+    }
+
+}

core-java-modules/pom.xml

@@ -165,6 +165,7 @@
         <module>core-java-networking</module>
         <module>core-java-networking-2</module>
         <module>core-java-networking-4</module>
+        <module>core-java-networking-5</module>
         <module>core-java-nio</module>
         <module>core-java-nio-2</module>
         <module>core-java-numbers</module>