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arbhard2
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Embedded HttpClient Project
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‎README.md‎

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Exercise for Java Advanced Concepts
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* Collection
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* Generics
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* Multithreading
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* HttpClient

‎src/main/java/com/ab/httpclient/advanced/WebSocket.java‎

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package com.ab.httpclient.advanced;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.time.Duration;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.CompletionStage;
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import java.util.concurrent.CountDownLatch;
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import static java.net.http.WebSocket.*;
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/**
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* @author Arpit Bhardwaj
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*/
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public class WebSocket {
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private static final int msgCount = 5;
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public static void main(String[] args) throws InterruptedException {
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CountDownLatch receiveLatch = new CountDownLatch(msgCount);
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CompletableFuture<java.net.http.WebSocket> webSocketCompletableFuture = HttpClient.newHttpClient()
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.newWebSocketBuilder()
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.connectTimeout(Duration.ofSeconds(3))
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.buildAsync(URI.create("ws://echo.websocket.org"), new EchoListener(receiveLatch));
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webSocketCompletableFuture.thenAccept(webSocket -> {
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webSocket.request(msgCount);
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for (int i = 0; i < msgCount; i++) {
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webSocket.sendText("Message " + i, true);
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}
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});
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receiveLatch.await();
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}
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private static class EchoListener implements Listener {
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CountDownLatch receiveLatch;
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public EchoListener(CountDownLatch receiveLatch) {
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this.receiveLatch = receiveLatch;
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}
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@Override
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public void onOpen(java.net.http.WebSocket webSocket) {
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System.out.println("Web Socket Opened");
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}
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@Override
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public CompletionStage<?> onText(java.net.http.WebSocket webSocket, CharSequence data, boolean last) {
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System.out.println("onText " + data);
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receiveLatch.countDown();
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return null;
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}
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}
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}

‎src/main/java/com/ab/httpclient/configuration/CookieDemo.java‎

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package com.ab.httpclient.configuration;
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import java.io.IOException;
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import java.net.CookieManager;
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import java.net.CookiePolicy;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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/**
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* @author Arpit Bhardwaj
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*/
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public class CookieDemo {
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public static void main(String[] args) throws IOException, InterruptedException {
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CookieManager cm = new CookieManager(null, CookiePolicy.ACCEPT_ALL);
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var httpClient = HttpClient.newBuilder().cookieHandler(cm).build();
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HttpRequest httpRequest = HttpRequest.newBuilder(URI.create("https://www.google.com")).build();
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httpClient.send(httpRequest, HttpResponse.BodyHandlers.discarding());
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System.out.println(cm.getCookieStore().getURIs());
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System.out.println(cm.getCookieStore().getCookies());
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}
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}

‎src/main/java/com/ab/httpclient/configuration/HttpClientConfig.java‎

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package com.ab.httpclient.configuration;
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import java.io.IOException;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.time.Duration;
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import java.util.List;
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import java.util.concurrent.CompletableFuture;
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import java.util.stream.Collectors;
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/**
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* @author Arpit Bhardwaj
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*/
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public class HttpClientConfig {
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private static HttpClient httpClient;
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public static void main(String[] args) throws IOException {
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httpClient = HttpClient.newBuilder()
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.connectTimeout(Duration.ofSeconds(3))
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.followRedirects(HttpClient.Redirect.NORMAL)
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.build();
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List<CompletableFuture<String>> collectCompletableFutureList = Files.lines(Path.of("urls.txt"))
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.map(HttpClientConfig::validateLink)
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.collect(Collectors.toList());
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collectCompletableFutureList.stream()
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.map(CompletableFuture::join)
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.forEach(System.out::println);
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}
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private static CompletableFuture<String> validateLink(String link) {
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HttpRequest httpRequest = HttpRequest.newBuilder(URI.create(link))
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.timeout(Duration.ofSeconds(5))
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.GET()
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.build();
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CompletableFuture<HttpResponse<Void>> httpResponseCompletableFuture = httpClient.sendAsync(httpRequest, HttpResponse.BodyHandlers.discarding());
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CompletableFuture<String> stringCompletableFuture = httpResponseCompletableFuture.thenApply(HttpClientConfig::responseToString)
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.exceptionally(throwable -> String.format("Exception Occurred : %s -> %s", link, false));
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return stringCompletableFuture;
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}
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private static String responseToString(HttpResponse<Void> httpResponse) {
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int status = httpResponse.statusCode();
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boolean success = status >= 200 && status <= 299;
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return String.format("%s -> %s (status: %s)", httpResponse.uri(), success, status);
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}
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}

‎src/main/java/com/ab/httpclient/configuration/Security.java‎

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package com.ab.httpclient.configuration;
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import javax.net.ssl.SSLContext;
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import javax.net.ssl.SSLParameters;
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import java.io.IOException;
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import java.net.*;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.security.NoSuchAlgorithmException;
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/**
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* @author Arpit Bhardwaj
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*/
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public class Security {
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public static void main(String[] args) throws IOException, InterruptedException, NoSuchAlgorithmException {
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SSLParameters parameters = new SSLParameters(
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new String[]{ "TLSv1.2"},
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new String[]{ "TLS_AES_128_GCM_SHA256"}
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);
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HttpClient httpClient = HttpClient.newBuilder()
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.sslContext(SSLContext.getDefault())
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.sslParameters(parameters)
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.proxy(
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ProxySelector.of(new InetSocketAddress("proxyserver.com",8080))
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//ProxySelector.getDefault()
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)
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.authenticator(new Authenticator(){
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@Override
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protected PasswordAuthentication getPasswordAuthentication() {
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return new PasswordAuthentication("username","password".toCharArray());
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//return super.getPasswordAuthentication();
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}
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})
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.build();
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HttpRequest httpRequest = HttpRequest.newBuilder(URI.create("https://www.google.com")).build();
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httpClient.send(httpRequest, HttpResponse.BodyHandlers.discarding());
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}
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}

‎src/main/java/com/ab/httpclient/linkvalidator/LinkValidatorAsync.java‎

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package com.ab.httpclient.linkvalidator;
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import java.io.IOException;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.List;
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import java.util.concurrent.CompletableFuture;
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import java.util.stream.Collectors;
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/**
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* @author Arpit Bhardwaj
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*/
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public class LinkValidatorAsync {
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private static HttpClient httpClient;
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public static void main(String[] args) throws IOException {
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httpClient = HttpClient.newHttpClient();
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/*Files.lines(Path.of("urls.txt"))
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.map(LinkValidatorAsync::validateLink)
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.forEach(System.out::println);*/
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List<CompletableFuture<String>> collectCompletableFutureList = Files.lines(Path.of("urls.txt"))
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.map(LinkValidatorAsync::validateLink)
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.collect(Collectors.toList());
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collectCompletableFutureList.stream()
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.map(CompletableFuture::join)
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.forEach(System.out::println);
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}
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private static CompletableFuture<String> validateLink(String link) {
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HttpRequest httpRequest = HttpRequest.newBuilder(URI.create(link)).GET().build();
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/*try {
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HttpResponse<Void> httpResponse = httpClient.send(httpRequest,HttpResponse.BodyHandlers.discarding());
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return responseToString(httpResponse);
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} catch (IOException | InterruptedException e) {
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return String.format("%s -> %s",link,false);
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}*/
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CompletableFuture<HttpResponse<Void>> httpResponseCompletableFuture = httpClient.sendAsync(httpRequest, HttpResponse.BodyHandlers.discarding());
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CompletableFuture<String> stringCompletableFuture = httpResponseCompletableFuture.thenApply(LinkValidatorAsync::responseToString)
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.exceptionally(throwable -> String.format("Exception Occurred : %s -> %s", link, false));
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return stringCompletableFuture;
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}
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private static String responseToString(HttpResponse<Void> httpResponse) {
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int status = httpResponse.statusCode();
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boolean success = status >= 200 && status <= 299;
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return String.format("%s -> %s (status: %s)",httpResponse.uri(),success,status);
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}
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}

‎src/main/java/com/ab/httpclient/linkvalidator/LinkValidatorSync.java‎

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package com.ab.httpclient.linkvalidator;
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import java.io.IOException;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.nio.file.Files;
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import java.nio.file.Path;
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/**
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* @author Arpit Bhardwaj
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*/
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public class LinkValidatorSync {
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private static HttpClient httpClient;
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public static void main(String[] args) throws IOException {
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httpClient = HttpClient.newHttpClient();
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Files.lines(Path.of("urls.txt"))
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.map(LinkValidatorSync::validateLink)
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.forEach(System.out::println);
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}
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private static String validateLink(String link) {
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HttpRequest httpRequest = HttpRequest.newBuilder(URI.create(link)).GET().build();
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try {
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HttpResponse<Void> httpResponse = httpClient.send(httpRequest,HttpResponse.BodyHandlers.discarding());
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return responseToString(httpResponse);
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} catch (IOException | InterruptedException e) {
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e.printStackTrace();
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return String.format("%s -> %s",link,false);
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}
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}
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private static String responseToString(HttpResponse<Void> httpResponse) {
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int status = httpResponse.statusCode();
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boolean success = status >= 200 && status <= 299;
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return String.format("%s -> %s (status: %s)",httpResponse.uri(),success,status);
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}
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}

‎src/main/java/com/ab/httpclient/rest/DrawnMatches.java‎

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package com.ab.httpclient.rest;
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import javax.script.*;
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import java.io.*;
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import java.net.*;
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/**
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* @author Arpit Bhardwaj
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*/
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public class DrawnMatches {
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public static void main(String[] args) throws IOException {
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System.out.println(getNumDraws(2011));
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}
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public static int getNumDraws(int year) throws IOException {
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final String endpoint = "https://jsonmock.hackerrank.com/api/football_matches?year=" + year;
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final int maxScore = 10;
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int totalNumDraws = 0;
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for (int score = 0; score <= maxScore; score++) {
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totalNumDraws += getTotalNumDraws(String.format(endpoint + "&team1goals=%d&team2goals=%d",
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score,
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score));
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}
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return totalNumDraws;
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}
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private static int getTotalNumDraws(String request) throws IOException {
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URL url = new URL(request);
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HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
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httpURLConnection.setRequestMethod("GET");
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httpURLConnection.setConnectTimeout(120000);
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httpURLConnection.setReadTimeout(120000);
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httpURLConnection.addRequestProperty("Content-Type", "application/json");
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int status = httpURLConnection.getResponseCode();
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InputStream in = (status < 200 || status > 299) ?
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httpURLConnection.getErrorStream() : httpURLConnection.getInputStream();
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BufferedReader reader = new BufferedReader(new InputStreamReader(in));
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String responseLine;
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StringBuffer responseContent = new StringBuffer();
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while ((responseLine = reader.readLine()) != null){
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responseContent.append(responseLine);
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}
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reader.close();
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httpURLConnection.disconnect();
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ScriptEngineManager manager = new ScriptEngineManager();
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ScriptEngine engine = manager.getEngineByName("javascript");
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String script = "var obj = JSON.parse('"+responseContent+"');";
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script += "var total = obj.total;";
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try {
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engine.eval(script);
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} catch (ScriptException e) {
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e.printStackTrace();
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}
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if (engine.get("total") == null){
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throw new RuntimeException("Cannot retrieve data from server");
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}
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return (int) engine.get("total");
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}
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}

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