diff --git a/core-java-11/src/main/java/com/baeldung/java11/httpclient/HttpClientExample.java b/core-java-11/src/main/java/com/baeldung/java11/httpclient/HttpClientExample.java new file mode 100644 index 0000000000..fb4abd3bb6 --- /dev/null +++ b/core-java-11/src/main/java/com/baeldung/java11/httpclient/HttpClientExample.java @@ -0,0 +1,132 @@ +/* + * To change this license header, choose License Headers in Project Properties. + * To change this template file, choose Tools | Templates + * and open the template in the editor. + */ +package com.baeldung.java11.httpclient; + +import java.io.IOException; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.http.HttpClient; +import java.net.http.HttpClient.Version; +import java.net.http.HttpRequest; +import java.net.http.HttpRequest.BodyPublishers; +import java.net.http.HttpResponse; +import java.net.http.HttpResponse.BodyHandlers; +import java.net.http.HttpResponse.PushPromiseHandler; +import java.util.Arrays; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.function.Function; +import java.util.stream.Collectors; + +public class HttpClientExample { + + public static void main(String[] args) throws Exception { + httpGetRequest(); + httpPostRequest(); + asynchronousGetRequest(); + asynchronousMultipleRequests(); + pushRequest(); + } + + public static void httpGetRequest() throws URISyntaxException, IOException, InterruptedException { + HttpClient client = HttpClient.newHttpClient(); + HttpRequest request = HttpRequest.newBuilder() + .version(HttpClient.Version.HTTP_2) + .uri(URI.create("http://jsonplaceholder.typicode.com/posts/1")) + .headers("Accept-Enconding", "gzip, deflate") + .build(); + HttpResponse response = client.send(request, BodyHandlers.ofString()); + + String responseBody = response.body(); + int responseStatusCode = response.statusCode(); + + System.out.println("httpGetRequest: " + responseBody); + System.out.println("httpGetRequest status code: " + responseStatusCode); + } + + public static void httpPostRequest() throws URISyntaxException, IOException, InterruptedException { + HttpClient client = HttpClient.newBuilder() + .version(HttpClient.Version.HTTP_2) + .build(); + HttpRequest request = HttpRequest.newBuilder(new URI("http://jsonplaceholder.typicode.com/posts")) + .version(HttpClient.Version.HTTP_2) + .POST(BodyPublishers.ofString("Sample Post Request")) + .build(); + HttpResponse response = client.send(request, BodyHandlers.ofString()); + String responseBody = response.body(); + System.out.println("httpPostRequest : " + responseBody); + } + + public static void asynchronousGetRequest() throws URISyntaxException { + HttpClient client = HttpClient.newHttpClient(); + URI httpURI = new URI("http://jsonplaceholder.typicode.com/posts/1"); + HttpRequest request = HttpRequest.newBuilder(httpURI) + .version(HttpClient.Version.HTTP_2) + .build(); + CompletableFuture futureResponse = client.sendAsync(request, HttpResponse.BodyHandlers.ofString()) + .thenAccept(resp -> { + System.out.println("Got pushed response " + resp.uri()); + System.out.println("Response statuscode: " + resp.statusCode()); + System.out.println("Response body: " + resp.body()); + }); + System.out.println("futureResponse" + futureResponse); + + } + + public static void asynchronousMultipleRequests() throws URISyntaxException { + HttpClient client = HttpClient.newHttpClient(); + List uris = Arrays.asList(new URI("http://jsonplaceholder.typicode.com/posts/1"), new URI("http://jsonplaceholder.typicode.com/posts/2")); + List requests = uris.stream() + .map(HttpRequest::newBuilder) + .map(reqBuilder -> reqBuilder.build()) + .collect(Collectors.toList()); + System.out.println("Got pushed response1 " + requests); + CompletableFuture.allOf(requests.stream() + .map(request -> client.sendAsync(request, BodyHandlers.ofString())) + .toArray(CompletableFuture[]::new)) + .thenAccept(System.out::println) + .join(); + } + + public static void pushRequest() throws URISyntaxException, InterruptedException { + System.out.println("Running HTTP/2 Server Push example..."); + + HttpClient httpClient = HttpClient.newBuilder() + .version(Version.HTTP_2) + .build(); + + HttpRequest pageRequest = HttpRequest.newBuilder() + .uri(URI.create("https://http2.golang.org/serverpush")) + .build(); + + // Interface HttpResponse.PushPromiseHandler + // void applyPushPromise​(HttpRequest initiatingRequest, HttpRequest pushPromiseRequest, Function,​CompletableFuture>> acceptor) + httpClient.sendAsync(pageRequest, BodyHandlers.ofString(), pushPromiseHandler()) + .thenAccept(pageResponse -> { + System.out.println("Page response status code: " + pageResponse.statusCode()); + System.out.println("Page response headers: " + pageResponse.headers()); + String responseBody = pageResponse.body(); + System.out.println(responseBody); + }).join(); + + Thread.sleep(1000); // waiting for full response + } + + private static PushPromiseHandler pushPromiseHandler() { + return (HttpRequest initiatingRequest, + HttpRequest pushPromiseRequest, + Function, + CompletableFuture>> acceptor) -> { + acceptor.apply(BodyHandlers.ofString()) + .thenAccept(resp -> { + System.out.println(" Pushed response: " + resp.uri() + ", headers: " + resp.headers()); + }); + System.out.println("Promise request: " + pushPromiseRequest.uri()); + System.out.println("Promise request: " + pushPromiseRequest.headers()); + }; + } + +} diff --git a/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpClientTest.java b/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpClientTest.java new file mode 100644 index 0000000000..bade666636 --- /dev/null +++ b/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpClientTest.java @@ -0,0 +1,240 @@ +package com.baeldung.java11.httpclient.test; + +import static org.hamcrest.CoreMatchers.containsString; +import static org.hamcrest.CoreMatchers.equalTo; +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertThat; +import static org.junit.Assert.assertTrue; +import static org.junit.Assert.fail; + +import java.io.IOException; +import java.net.Authenticator; +import java.net.CookieManager; +import java.net.CookiePolicy; +import java.net.HttpURLConnection; +import java.net.PasswordAuthentication; +import java.net.ProxySelector; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.http.HttpClient; +import java.net.http.HttpRequest; +import java.net.http.HttpResponse; +import java.net.http.HttpResponse.BodyHandlers; +import java.util.Arrays; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.CompletionException; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; +import java.util.stream.Collectors; + +import org.junit.jupiter.api.Test; + +public class HttpClientTest { + + @Test + public void shouldReturnSampleDataContentWhenConnectViaSystemProxy() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .headers("Content-Type", "text/plain;charset=UTF-8") + .POST(HttpRequest.BodyPublishers.ofString("Sample body")) + .build(); + + + HttpResponse response = HttpClient.newBuilder() + .proxy(ProxySelector.getDefault()) + .build() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.body(), containsString("Sample body")); + } + + @Test + public void shouldNotFollowRedirectWhenSetToDefaultNever() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("http://stackoverflow.com")) + .version(HttpClient.Version.HTTP_1_1) + .GET() + .build(); + HttpResponse response = HttpClient.newBuilder() + .build() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_MOVED_PERM)); + assertThat(response.body(), containsString("https://stackoverflow.com/")); + } + + @Test + public void shouldFollowRedirectWhenSetToAlways() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("http://stackoverflow.com")) + .version(HttpClient.Version.HTTP_1_1) + .GET() + .build(); + HttpResponse response = HttpClient.newBuilder() + .followRedirects(HttpClient.Redirect.ALWAYS) + .build() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.request() + .uri() + .toString(), equalTo("https://stackoverflow.com/")); + } + + @Test + public void shouldReturnOKStatusForAuthenticatedAccess() throws URISyntaxException, IOException, InterruptedException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/basic-auth")) + .GET() + .build(); + HttpResponse response = HttpClient.newBuilder() + .authenticator(new Authenticator() { + @Override + protected PasswordAuthentication getPasswordAuthentication() { + return new PasswordAuthentication("postman", "password".toCharArray()); + } + }) + .build() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldSendRequestAsync() throws URISyntaxException, InterruptedException, ExecutionException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .headers("Content-Type", "text/plain;charset=UTF-8") + .POST(HttpRequest.BodyPublishers.ofString("Sample body")) + .build(); + CompletableFuture> response = HttpClient.newBuilder() + .build() + .sendAsync(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.get() + .statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldUseJustTwoThreadWhenProcessingSendAsyncRequest() throws URISyntaxException, InterruptedException, ExecutionException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .GET() + .build(); + + ExecutorService executorService = Executors.newFixedThreadPool(2); + + CompletableFuture> response1 = HttpClient.newBuilder() + .executor(executorService) + .build() + .sendAsync(request, HttpResponse.BodyHandlers.ofString()); + + CompletableFuture> response2 = HttpClient.newBuilder() + .executor(executorService) + .build() + .sendAsync(request, HttpResponse.BodyHandlers.ofString()); + + CompletableFuture> response3 = HttpClient.newBuilder() + .executor(executorService) + .build() + .sendAsync(request, HttpResponse.BodyHandlers.ofString()); + + CompletableFuture.allOf(response1, response2, response3) + .join(); + + assertThat(response1.get() + .statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response2.get() + .statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response3.get() + .statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldNotStoreCookieWhenPolicyAcceptNone() throws URISyntaxException, IOException, InterruptedException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .GET() + .build(); + + HttpClient httpClient = HttpClient.newBuilder() + .cookieHandler(new CookieManager(null, CookiePolicy.ACCEPT_NONE)) + .build(); + + httpClient.send(request, HttpResponse.BodyHandlers.ofString()); + + assertTrue(httpClient.cookieHandler() + .isPresent()); + } + + @Test + public void shouldStoreCookieWhenPolicyAcceptAll() throws URISyntaxException, IOException, InterruptedException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .GET() + .build(); + + HttpClient httpClient = HttpClient.newBuilder() + .cookieHandler(new CookieManager(null, CookiePolicy.ACCEPT_ALL)) + .build(); + + httpClient.send(request, HttpResponse.BodyHandlers.ofString()); + + assertTrue(httpClient.cookieHandler() + .isPresent()); + } + + @Test + public void shouldProcessMultipleRequestViaStream() throws URISyntaxException, ExecutionException, InterruptedException { + List targets = Arrays.asList(new URI("https://postman-echo.com/get?foo1=bar1"), new URI("https://postman-echo.com/get?foo2=bar2")); + + HttpClient client = HttpClient.newHttpClient(); + + List> futures = targets.stream() + .map(target -> client.sendAsync(HttpRequest.newBuilder(target) + .GET() + .build(), HttpResponse.BodyHandlers.ofString()) + .thenApply(response -> response.body())) + .collect(Collectors.toList()); + + CompletableFuture.allOf(futures.toArray(new CompletableFuture[0])) + .join(); + + if (futures.get(0) + .get() + .contains("foo1")) { + assertThat(futures.get(0) + .get(), containsString("bar1")); + assertThat(futures.get(1) + .get(), containsString("bar2")); + } else { + assertThat(futures.get(1) + .get(), containsString("bar2")); + assertThat(futures.get(1) + .get(), containsString("bar1")); + } + + } + + @Test + public void completeExceptionallyExample() { + CompletableFuture cf = CompletableFuture.completedFuture("message").thenApplyAsync(String::toUpperCase, + CompletableFuture.delayedExecutor(1, TimeUnit.SECONDS)); + CompletableFuture exceptionHandler = cf.handle((s, th) -> { return (th != null) ? "message upon cancel" : ""; }); + cf.completeExceptionally(new RuntimeException("completed exceptionally")); + assertTrue("Was not completed exceptionally", cf.isCompletedExceptionally()); + try { + cf.join(); + fail("Should have thrown an exception"); + } catch (CompletionException ex) { // just for testing + assertEquals("completed exceptionally", ex.getCause().getMessage()); + } + + assertEquals("message upon cancel", exceptionHandler.join()); + } + +} diff --git a/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpRequestTest.java b/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpRequestTest.java new file mode 100644 index 0000000000..7d138bd8d5 --- /dev/null +++ b/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpRequestTest.java @@ -0,0 +1,168 @@ +package com.baeldung.java11.httpclient.test; + +import static java.time.temporal.ChronoUnit.SECONDS; +import static org.hamcrest.CoreMatchers.containsString; +import static org.hamcrest.CoreMatchers.equalTo; +import static org.junit.Assert.assertThat; + +import java.io.ByteArrayInputStream; +import java.io.IOException; +import java.net.HttpURLConnection; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.http.HttpClient; +import java.net.http.HttpRequest; +import java.net.http.HttpResponse; +import java.nio.file.Paths; +import java.security.NoSuchAlgorithmException; +import java.time.Duration; + +import org.junit.Test; + +public class HttpRequestTest { + + @Test + public void shouldReturnStatusOKWhenSendGetRequest() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .GET() + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldUseHttp2WhenWebsiteUsesHttp2() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://stackoverflow.com")) + .version(HttpClient.Version.HTTP_2) + .GET() + .build(); + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.version(), equalTo(HttpClient.Version.HTTP_2)); + } + + @Test + public void shouldFallbackToHttp1_1WhenWebsiteDoesNotUseHttp2() throws IOException, InterruptedException, URISyntaxException, NoSuchAlgorithmException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .version(HttpClient.Version.HTTP_2) + .GET() + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.version(), equalTo(HttpClient.Version.HTTP_1_1)); + } + + @Test + public void shouldReturnStatusOKWhenSendGetRequestWithDummyHeaders() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .headers("key1", "value1", "key2", "value2") + .GET() + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldReturnStatusOKWhenSendGetRequestTimeoutSet() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .timeout(Duration.of(10, SECONDS)) + .GET() + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldReturnNoContentWhenPostWithNoBody() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .POST(HttpRequest.BodyPublishers.noBody()) + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + } + + @Test + public void shouldReturnSampleDataContentWhenPostWithBodyText() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .headers("Content-Type", "text/plain;charset=UTF-8") + .POST(HttpRequest.BodyPublishers.ofString("Sample request body")) + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.body(), containsString("Sample request body")); + } + + @Test + public void shouldReturnSampleDataContentWhenPostWithInputStream() throws IOException, InterruptedException, URISyntaxException { + byte[] sampleData = "Sample request body".getBytes(); + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .headers("Content-Type", "text/plain;charset=UTF-8") + .POST(HttpRequest.BodyPublishers.ofInputStream(() -> new ByteArrayInputStream(sampleData))) + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.body(), containsString("Sample request body")); + } + + @Test + public void shouldReturnSampleDataContentWhenPostWithByteArrayProcessorStream() throws IOException, InterruptedException, URISyntaxException { + byte[] sampleData = "Sample request body".getBytes(); + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .headers("Content-Type", "text/plain;charset=UTF-8") + .POST(HttpRequest.BodyPublishers.ofByteArray(sampleData)) + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.body(), containsString("Sample request body")); + } + + @Test + public void shouldReturnSampleDataContentWhenPostWithFileProcessorStream() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/post")) + .headers("Content-Type", "text/plain;charset=UTF-8") + .POST(HttpRequest.BodyPublishers.ofFile(Paths.get("src/test/resources/sample.txt"))) + .build(); + + HttpResponse response = HttpClient.newHttpClient() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertThat(response.body(), containsString("Sample file content")); + } + +} diff --git a/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpResponseTest.java b/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpResponseTest.java new file mode 100644 index 0000000000..78d86fbf4e --- /dev/null +++ b/core-java-11/src/test/java/com/baeldung/java11/httpclient/test/HttpResponseTest.java @@ -0,0 +1,54 @@ +package com.baeldung.java11.httpclient.test; + +import static org.hamcrest.CoreMatchers.equalTo; +import static org.junit.Assert.assertNotNull; +import static org.junit.Assert.assertThat; + +import java.io.IOException; +import java.net.HttpURLConnection; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.http.HttpClient; +import java.net.http.HttpRequest; +import java.net.http.HttpResponse; + +import org.junit.Test; + +public class HttpResponseTest { + + @Test + public void shouldReturnStatusOKWhenSendGetRequest() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("https://postman-echo.com/get")) + .version(HttpClient.Version.HTTP_2) + .GET() + .build(); + + HttpResponse response = HttpClient.newBuilder() + .followRedirects(HttpClient.Redirect.NORMAL) + .build() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(response.statusCode(), equalTo(HttpURLConnection.HTTP_OK)); + assertNotNull(response.body()); + } + + @Test + public void shouldResponseURIDifferentThanRequestUIRWhenRedirect() throws IOException, InterruptedException, URISyntaxException { + HttpRequest request = HttpRequest.newBuilder() + .uri(new URI("http://stackoverflow.com")) + .version(HttpClient.Version.HTTP_2) + .GET() + .build(); + HttpResponse response = HttpClient.newBuilder() + .followRedirects(HttpClient.Redirect.NORMAL) + .build() + .send(request, HttpResponse.BodyHandlers.ofString()); + + assertThat(request.uri() + .toString(), equalTo("http://stackoverflow.com")); + assertThat(response.uri() + .toString(), equalTo("https://stackoverflow.com/")); + } + +}