JAVA-10903: Rename HttpClient Modules to Apache HttpClient (#12070)

* JAVA-10903: rename httpclient to apache-httpclient

* JAVA-10903: rename httpclient-2 to apache-httpclient

* JAVA-10903: update main pom

apache-httpclient-2/.gitignore

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+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

apache-httpclient-2/README.md

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+## HttpClient 4.x
+
+This module contains articles about HttpClient 4.x
+
+### The Course
+
+The "REST With Spring" Classes: http://bit.ly/restwithspring
+
+### Relevant Articles: 
+
+- [How to Set TLS Version in Apache HttpClient](https://www.baeldung.com/apache-httpclient-tls)
+- [Reading an HTTP Response Body as a String in Java](https://www.baeldung.com/java-http-response-body-as-string)
+- [How To Get Cookies From the Apache HttpClient Response](https://www.baeldung.com/java-apache-httpclient-cookies)
+- [Enabling Logging for Apache HttpClient](https://www.baeldung.com/apache-httpclient-enable-logging)
+- [Expand Shortened URLs with Apache HttpClient](https://www.baeldung.com/apache-httpclient-expand-url)
+- [Apache HttpClient vs. CloseableHttpClient](https://www.baeldung.com/apache-httpclient-vs-closeablehttpclient)
+- More articles: [[<-- prev]](../apache-httpclient)

apache-httpclient-2/pom.xml

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+<?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>apache-httpclient-2</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>apache-httpclient-2</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <!-- http client -->
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpclient</artifactId>
+            <version>${httpclient.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>commons-logging</artifactId>
+                    <groupId>commons-logging</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.httpcomponents.client5</groupId>
+            <artifactId>httpclient5</artifactId>
+            <version>${httpclient5.version}</version>
+        </dependency>
+        <!-- rest template -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+            <version>${spring-boot.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <version>${spring-boot.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <!-- Webclient -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+            <version>${spring-boot.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mock-server</groupId>
+            <artifactId>mockserver-netty</artifactId>
+            <version>${mockserver.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mock-server</groupId>
+            <artifactId>mockserver-client-java</artifactId>
+            <version>${mockserver.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>apache-httpclient-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source.version}</source>
+                    <target>${maven.compiler.target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <assertj.version>3.22.0</assertj.version>
+        <mockserver.version>5.11.2</mockserver.version>
+        <httpclient.version>4.5.8</httpclient.version>
+        <httpclient5.version>5.1.3</httpclient5.version>
+        <maven.compiler.source.version>11</maven.compiler.source.version>
+        <maven.compiler.target.version>11</maven.compiler.target.version>
+        <spring-boot.version>2.1.7.RELEASE</spring-boot.version>
+    </properties>
+
+</project>

apache-httpclient-2/src/main/java/com/baeldung/tlsversion/ClientTlsVersionExamples.java

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+package com.baeldung.tlsversion;
+
+import javax.net.ssl.SSLSocket;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.ssl.SSLContexts;
+import org.apache.http.util.EntityUtils;
+
+import java.io.IOException;
+
+public class ClientTlsVersionExamples {
+
+    public static CloseableHttpClient setViaSocketFactory() {
+        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
+          SSLContexts.createDefault(),
+          new String[] { "TLSv1.2", "TLSv1.3" },
+          null,
+          SSLConnectionSocketFactory.getDefaultHostnameVerifier());
+
+        return HttpClients.custom().setSSLSocketFactory(sslsf).build();
+    }
+
+    public static CloseableHttpClient setTlsVersionPerConnection() {
+        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(SSLContexts.createDefault()) {
+
+            @Override
+            protected void prepareSocket(SSLSocket socket) {
+                String hostname = socket.getInetAddress().getHostName();
+                if (hostname.endsWith("internal.system.com")) {
+                    socket.setEnabledProtocols(new String[] { "TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3" });
+                } else {
+                    socket.setEnabledProtocols(new String[] { "TLSv1.3" });
+                }
+            }
+        };
+
+        return HttpClients.custom().setSSLSocketFactory(sslsf).build();
+    }
+
+    // To configure the TLS versions for the client, set the https.protocols system property during runtime.
+    // For example: java -Dhttps.protocols=TLSv1.1,TLSv1.2,TLSv1.3 -jar webClient.jar
+    public static CloseableHttpClient setViaSystemProperties() {
+        return HttpClients.createSystem();
+        // Alternatively:
+        // return HttpClients.custom().useSystemProperties().build();
+    }
+
+    public static void main(String[] args) throws IOException {
+        // Alternatively:
+        // CloseableHttpClient httpClient = setTlsVersionPerConnection();
+        // CloseableHttpClient httpClient = setViaSystemProperties();
+        try (CloseableHttpClient httpClient = setViaSocketFactory();
+           CloseableHttpResponse response = httpClient.execute(new HttpGet("https://httpbin.org/"))) {
+
+            HttpEntity entity = response.getEntity();
+            EntityUtils.consume(entity);
+        }
+    }
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/cookies/HttpClientGettingCookieValueUnitTest.java

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+package com.baeldung.httpclient.cookies;
+
+import org.apache.http.client.CookieStore;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.protocol.HttpClientContext;
+import org.apache.http.cookie.ClientCookie;
+import org.apache.http.cookie.Cookie;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.impl.cookie.BasicClientCookie;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+
+
+public class HttpClientGettingCookieValueUnitTest {
+    private static Logger log = LoggerFactory.getLogger(HttpClientGettingCookieValueUnitTest.class);
+
+    private static final String SAMPLE_URL = "http://www.baeldung.com/";
+
+    @Test
+    public final void whenSettingCustomCookieOnTheRequest_thenGettingTheSameCookieFromTheResponse() throws IOException {
+        HttpClientContext context = HttpClientContext.create();
+        context.setAttribute(HttpClientContext.COOKIE_STORE, createCustomCookieStore());
+
+        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+            try (CloseableHttpResponse response = httpClient.execute(new HttpGet(SAMPLE_URL), context)) {
+                CookieStore cookieStore = context.getCookieStore();
+                Cookie customCookie = cookieStore.getCookies()
+                  .stream()
+                  .peek(cookie -> log.info("cookie name:{}", cookie.getName()))
+                  .filter(cookie -> "custom_cookie".equals(cookie.getName()))
+                  .findFirst()
+                  .orElseThrow(IllegalStateException::new);
+
+                assertEquals("test_value", customCookie.getValue());
+            }
+        }
+    }
+
+    private BasicCookieStore createCustomCookieStore() {
+        BasicCookieStore cookieStore = new BasicCookieStore();
+        BasicClientCookie cookie = new BasicClientCookie("custom_cookie", "test_value");
+        cookie.setDomain("baeldung.com");
+        cookie.setAttribute(ClientCookie.DOMAIN_ATTR, "true");
+        cookie.setPath("/");
+        cookieStore.addCookie(cookie);
+        return cookieStore;
+    }
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/expandurl/HttpClientExpandUrlLiveTest.java

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+package com.baeldung.httpclient.expandurl;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Lists;
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.http.Header;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpHeaders;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.methods.HttpHead;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.util.EntityUtils;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+public class HttpClientExpandUrlLiveTest {
+
+    private CloseableHttpClient client;
+
+    @Before
+    public final void before() {
+        client = HttpClientBuilder.create().disableRedirectHandling().build();
+    }
+
+    @Test
+    public final void givenShortenedOnce_whenUrlIsExpanded_thenCorrectResult() throws IOException {
+        final String expectedResult = "https://www.baeldung.com/rest-versioning";
+        final String actualResult = expandSingleLevel("http://bit.ly/3LScTri");
+        assertThat(actualResult, equalTo(expectedResult));
+    }
+
+    @Test
+    public final void givenShortenedMultiple_whenUrlIsExpanded_thenCorrectResult() throws IOException {
+        final String expectedResult = "https://www.baeldung.com/rest-versioning";
+        final String actualResult = expand("http://t.co/e4rDDbnzmk");
+        assertThat(actualResult, equalTo(expectedResult));
+    }
+
+    private String expand(final String urlArg) throws IOException {
+        String originalUrl = urlArg;
+        String newUrl = expandSingleLevel(originalUrl);
+        while (!originalUrl.equals(newUrl)) {
+            originalUrl = newUrl;
+            newUrl = expandSingleLevel(originalUrl);
+        }
+
+        return newUrl;
+    }
+
+    final String expandSafe(final String urlArg) throws IOException {
+        String originalUrl = urlArg;
+        String newUrl = expandSingleLevelSafe(originalUrl).getRight();
+        final List<String> alreadyVisited = Lists.newArrayList(originalUrl, newUrl);
+        while (!originalUrl.equals(newUrl)) {
+            originalUrl = newUrl;
+            final Pair<Integer, String> statusAndUrl = expandSingleLevelSafe(originalUrl);
+            newUrl = statusAndUrl.getRight();
+            final boolean isRedirect = statusAndUrl.getLeft() == 301 || statusAndUrl.getLeft() == 302;
+            if (isRedirect && alreadyVisited.contains(newUrl)) {
+                throw new IllegalStateException("Likely a redirect loop");
+            }
+            alreadyVisited.add(newUrl);
+        }
+
+        return newUrl;
+    }
+
+    private Pair<Integer, String> expandSingleLevelSafe(final String url) throws IOException {
+        HttpHead request = null;
+        HttpEntity httpEntity = null;
+        InputStream entityContentStream = null;
+
+        try {
+            request = new HttpHead(url);
+            final HttpResponse httpResponse = client.execute(request);
+
+            httpEntity = httpResponse.getEntity();
+            entityContentStream = httpEntity.getContent();
+
+            final int statusCode = httpResponse.getStatusLine().getStatusCode();
+            if (statusCode != 301 && statusCode != 302) {
+                return new ImmutablePair<>(statusCode, url);
+            }
+            final Header[] headers = httpResponse.getHeaders(HttpHeaders.LOCATION);
+            Preconditions.checkState(headers.length == 1);
+            final String newUrl = headers[0].getValue();
+
+            return new ImmutablePair<>(statusCode, newUrl);
+        } catch (final IllegalArgumentException uriEx) {
+            return new ImmutablePair<>(500, url);
+        } finally {
+            if (request != null) {
+                request.releaseConnection();
+            }
+            if (entityContentStream != null) {
+                entityContentStream.close();
+            }
+            if (httpEntity != null) {
+                EntityUtils.consume(httpEntity);
+            }
+        }
+    }
+
+    private String expandSingleLevel(final String url) throws IOException {
+        HttpHead request = null;
+
+        try {
+            request = new HttpHead(url);
+            final HttpResponse httpResponse = client.execute(request);
+
+            final int statusCode = httpResponse.getStatusLine().getStatusCode();
+            if (statusCode != 301 && statusCode != 302) {
+                return url;
+            }
+            final Header[] headers = httpResponse.getHeaders(HttpHeaders.LOCATION);
+            Preconditions.checkState(headers.length == 1);
+
+            return headers[0].getValue();
+        } catch (final IllegalArgumentException uriEx) {
+            return url;
+        } finally {
+            if (request != null) {
+                request.releaseConnection();
+            }
+        }
+    }
+
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/httpclient/ApacheHttpClientUnitTest.java

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+package com.baeldung.httpclient.httpclient;
+
+import org.apache.hc.client5.http.classic.HttpClient;
+import org.apache.hc.client5.http.classic.methods.HttpGet;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
+import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.HttpEntity;
+import org.apache.hc.core5.http.HttpResponse;
+import org.apache.hc.core5.http.HttpStatus;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ApacheHttpClientUnitTest extends GetRequestMockServer {
+
+    @Test
+    void givenDeveloperUsedHttpClient_whenExecutingGetRequest_thenStatusIsOkButSonarReportsAnIssue() throws IOException {
+        HttpClient httpClient = HttpClients.createDefault();
+        HttpGet httpGet = new HttpGet(serviceOneUrl);
+        HttpResponse response = httpClient.execute(httpGet);
+        assertThat(response.getCode()).isEqualTo(HttpStatus.SC_OK);
+    }
+
+    @Test
+    void givenDeveloperUsedCloseableHttpClient_whenExecutingGetRequest_thenStatusIsOk() throws IOException {
+        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+            HttpGet httpGet = new HttpGet(serviceOneUrl);
+            HttpResponse response = httpClient.execute(httpGet);
+            assertThat(response.getCode()).isEqualTo(HttpStatus.SC_OK);
+        }
+    }
+
+    @Test
+    void givenDeveloperUsedHttpClientBuilder_whenExecutingGetRequest_thenStatusIsOk() throws IOException {
+        try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
+            HttpGet httpGet = new HttpGet(serviceOneUrl);
+            HttpResponse response = httpClient.execute(httpGet);
+            assertThat(response.getCode()).isEqualTo(HttpStatus.SC_OK);
+        }
+    }
+
+    @Test
+    void givenDeveloperUsedCloseableHttpResponse_whenExecutingGetRequest_thenStatusIsOk() throws IOException {
+        try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
+            HttpGet httpGet = new HttpGet(serviceOneUrl);
+            try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
+                HttpEntity entity = response.getEntity();
+                EntityUtils.consume(entity);
+                assertThat(response.getCode()).isEqualTo(HttpStatus.SC_OK);
+            }
+        }
+    }
+
+    @Test
+    void givenDeveloperUsedSingleClient_whenExecutingTwoGetRequest_thenStatusIsOk() throws IOException {
+        try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
+            HttpGet httpGetOne = new HttpGet(serviceOneUrl);
+            try (CloseableHttpResponse responseOne = httpClient.execute(httpGetOne)) {
+                HttpEntity entityOne = responseOne.getEntity();
+                EntityUtils.consume(entityOne);
+                assertThat(responseOne.getCode()).isEqualTo(HttpStatus.SC_OK);
+            }
+
+            HttpGet httpGetTwo = new HttpGet(serviceTwoUrl);
+            try (CloseableHttpResponse responseTwo = httpClient.execute(httpGetTwo)) {
+                HttpEntity entityTwo = responseTwo.getEntity();
+                EntityUtils.consume(entityTwo);
+                assertThat(responseTwo.getCode()).isEqualTo(HttpStatus.SC_OK);
+            }
+        }
+    }
+
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/httpclient/GetRequestMockServer.java

@@ -0,0 +1,78 @@
+package com.baeldung.httpclient.httpclient;
+
+import org.apache.hc.core5.http.HttpStatus;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.mockserver.client.MockServerClient;
+import org.mockserver.integration.ClientAndServer;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.URISyntaxException;
+
+import static org.mockserver.integration.ClientAndServer.startClientAndServer;
+import static org.mockserver.matchers.Times.exactly;
+import static org.mockserver.model.HttpRequest.request;
+import static org.mockserver.model.HttpResponse.response;
+
+public class GetRequestMockServer {
+
+    public static ClientAndServer mockServer;
+    public static String serviceOneUrl;
+    public static String serviceTwoUrl;
+
+    private static int serverPort;
+
+    public static final String SERVER_ADDRESS = "127.0.0.1";
+    public static final String PATH_ONE = "/test1";
+    public static final String PATH_TWO = "/test2";
+    public static final String METHOD = "GET";
+
+    @BeforeAll
+    static void startServer() throws IOException, URISyntaxException {
+        serverPort = getFreePort();
+        serviceOneUrl = "http://" + SERVER_ADDRESS + ":" + serverPort + PATH_ONE;
+        serviceTwoUrl = "http://" + SERVER_ADDRESS + ":" + serverPort + PATH_TWO;
+        mockServer = startClientAndServer(serverPort);
+        mockGetRequest();
+    }
+
+    @AfterAll
+    static void stopServer() {
+        mockServer.stop();
+    }
+
+    private static void mockGetRequest() {
+        new MockServerClient(SERVER_ADDRESS, serverPort)
+          .when(
+            request()
+              .withPath(PATH_ONE)
+              .withMethod(METHOD),
+            exactly(5)
+          )
+          .respond(
+            response()
+              .withStatusCode(HttpStatus.SC_OK)
+              .withBody("{\"status\":\"ok\"}")
+          );
+        new MockServerClient(SERVER_ADDRESS, serverPort)
+          .when(
+            request()
+              .withPath(PATH_TWO)
+              .withMethod(METHOD),
+            exactly(1)
+          )
+          .respond(
+            response()
+              .withStatusCode(HttpStatus.SC_OK)
+              .withBody("{\"status\":\"ok\"}")
+          );
+    }
+
+    private static int getFreePort () throws IOException {
+        try (ServerSocket serverSocket = new ServerSocket(0)) {
+            return serverSocket.getLocalPort();
+        }
+    }
+
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/readresponsebodystring/ApacheHttpClient5UnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.httpclient.readresponsebodystring;
+
+import org.apache.hc.client5.http.classic.methods.HttpGet;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.HttpEntity;
+import org.apache.hc.core5.http.ParseException;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+public class ApacheHttpClient5UnitTest {
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    public static final String DUMMY_URL = "https://postman-echo.com/get";
+
+    @Test
+    public void whenUseApacheHttpClient_thenCorrect() throws IOException, ParseException {
+        HttpGet request = new HttpGet(DUMMY_URL);
+
+        try (CloseableHttpClient client = HttpClients.createDefault(); CloseableHttpResponse response = client.execute(request)) {
+            HttpEntity entity = response.getEntity();
+            logger.debug("Response -> {}", EntityUtils.toString(entity));
+        }
+    }
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/readresponsebodystring/ApacheHttpClientUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.httpclient.readresponsebodystring;
+
+import org.apache.http.HttpEntity;
+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.apache.http.util.EntityUtils;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+public class ApacheHttpClientUnitTest {
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    public static final String DUMMY_URL = "https://postman-echo.com/get";
+
+    @Test
+    public void whenUseApacheHttpClient_thenCorrect() throws IOException {
+        HttpGet request = new HttpGet(DUMMY_URL);
+
+        try (CloseableHttpClient client = HttpClients.createDefault(); CloseableHttpResponse response = client.execute(request)) {
+            HttpEntity entity = response.getEntity();
+            logger.debug("Response -> {}",  EntityUtils.toString(entity));
+        }
+    }
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/readresponsebodystring/HttpClientUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.httpclient.readresponsebodystring;
+
+import org.junit.Test;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+
+public class HttpClientUnitTest {
+    public static final String DUMMY_URL = "https://postman-echo.com/get";
+
+    @Test
+    public void whenUseHttpClient_thenCorrect() throws IOException, InterruptedException {
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder().uri(URI.create(DUMMY_URL)).build();
+
+        // synchronous response
+        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+        System.out.println(response.body());
+
+        // asynchronous response
+        client.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(HttpResponse::body)
+            .thenAccept(System.out::println)
+            .join();
+    }
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/readresponsebodystring/HttpUrlConnectionUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.httpclient.readresponsebodystring;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class HttpUrlConnectionUnitTest {
+
+    public static final String DUMMY_URL = "https://postman-echo.com/get";
+
+    @Test
+    public void whenUseHttpUrlConnection_thenCorrect() throws IOException {
+        HttpURLConnection connection = (HttpURLConnection) new URL(DUMMY_URL).openConnection();
+
+        InputStream inputStream = connection.getInputStream();
+
+        BufferedReader in = new BufferedReader(new InputStreamReader(inputStream));
+        StringBuilder response = new StringBuilder();
+        String currentLine;
+
+        while ((currentLine = in.readLine()) != null)
+            response.append(currentLine);
+
+        in.close();
+        Assert.assertNotNull(response.toString());
+        System.out.println("Response -> " + response.toString());
+    }
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/readresponsebodystring/SpringRestTemplateUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.httpclient.readresponsebodystring;
+
+import org.junit.Test;
+import org.springframework.web.client.RestTemplate;
+
+public class SpringRestTemplateUnitTest {
+
+    public static final String DUMMY_URL = "https://postman-echo.com/get";
+
+    @Test
+    public void whenUseRestTemplate_thenCorrect() {
+        RestTemplate restTemplate = new RestTemplate();
+        String response = restTemplate.getForObject(DUMMY_URL, String.class);
+        System.out.println(response);
+    }
+
+}

apache-httpclient-2/src/test/java/com/baeldung/httpclient/readresponsebodystring/SpringWebClientUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.httpclient.readresponsebodystring;
+
+import org.junit.Test;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+public class SpringWebClientUnitTest {
+    public static final String DUMMY_URL = "https://postman-echo.com/get";
+
+    @Test
+    public void whenUseWebClientRetrieve_thenCorrect() {
+        WebClient webClient = WebClient.create(DUMMY_URL);
+        Mono<String> body = webClient.get().retrieve().bodyToMono(String.class);
+        String s = body.block();
+        System.out.println(s);
+    }
+}

apache-httpclient-2/src/test/resources/logback.xml

@@ -0,0 +1,15 @@
+<configuration debug="false">
+    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%date [%level] %logger - %msg %n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="com.baeldung.httpclient.readresponsebodystring" level="debug"/>
+    <logger name="org.apache.http" level="debug"/>
+    <logger name="org.apache.hc.client5.http" level="debug"/>
+
+    <root level="WARN">
+        <appender-ref ref="stdout"/>
+    </root>
+</configuration>