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package com.hellokoding.java.java11;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.tomakehurst.wiremock.common.ConsoleNotifier;
import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
import com.github.tomakehurst.wiremock.extension.responsetemplating.ResponseTemplateTransformer;
import com.github.tomakehurst.wiremock.junit.WireMockClassRule;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLParameters;
import java.io.IOException;
import java.net.*;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.charset.StandardCharsets;
import java.security.NoSuchAlgorithmException;
import java.time.Duration;
import java.util.Base64;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executors;
import static com.github.tomakehurst.wiremock.client.WireMock.*;
import static org.assertj.core.api.Assertions.assertThat;
public class HttpClientExamples {
private ObjectMapper objectMapper = new ObjectMapper();
@ClassRule
public static final WireMockClassRule wireMockRule = new WireMockClassRule(
WireMockConfiguration.options()
.port(8081)
.notifier(new ConsoleNotifier(true))
.extensions(new ResponseTemplateTransformer(true)));
@BeforeClass
public static void setUp() {
stubFor(any(urlEqualTo("/test/resource"))
.withHeader("Accept", equalTo("application/json"))
.willReturn(aResponse()
.withStatus(200)
.withHeader("Content-Type", "application/json")
.withBody("{\"id\":\"1\",\"title\":\"Java 11 HttpClient in practice\"}")));
stubFor(any(urlEqualTo("/test/secure"))
.withBasicAuth("user", "pass")
.willReturn(ok()));
stubFor(any(urlEqualTo("/test/set-cookie"))
.willReturn(aResponse()
.withStatus(200)
.withHeader("Set-Cookie", "SID=Any; Path=/; Domain=localhost")));
}
@Test
public void createAnHTTPClient() throws NoSuchAlgorithmException {
HttpClient client = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_2)
.proxy(ProxySelector.getDefault())
.followRedirects(HttpClient.Redirect.NEVER)
.authenticator(new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("user", "pass".toCharArray());
}
})
.cookieHandler(new CookieManager())
.executor(Executors.newFixedThreadPool(2))
.priority(1)
.sslContext(SSLContext.getDefault())
.sslParameters(new SSLParameters())
.connectTimeout(Duration.ofSeconds(1))
.build();
assertThat(client.connectTimeout()).get().isEqualTo(Duration.ofSeconds(1));
}
@Test
public void createADefaultHTTPClient() {
HttpClient client = HttpClient.newHttpClient();
assertThat(client.version()).isEqualTo(HttpClient.Version.HTTP_2);
assertThat(client.followRedirects()).isEqualTo(HttpClient.Redirect.NEVER);
assertThat(client.proxy()).isEmpty();
assertThat(client.connectTimeout()).isEmpty();
assertThat(client.cookieHandler()).isEmpty();
assertThat(client.authenticator()).isEmpty();
assertThat(client.executor()).isEmpty();
}
@Test
public void buildAnHTTPRequest() {
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/resource"))
.POST(HttpRequest.BodyPublishers.noBody())
.version(HttpClient.Version.HTTP_2)
.header("Accept", "application/json")
.timeout(Duration.ofMillis(500))
.build();
assertThat(request.timeout().get()).isEqualTo(Duration.ofMillis(500));
}
@Test
public void getSync() throws IOException, InterruptedException {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/resource"))
.header("Accept", "application/json")
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
assertThat(response.statusCode()).isEqualTo(200);
}
@Test
public void getAsync() {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/resource"))
.header("Accept", "application/json")
.build();
int statusCode = client.sendAsync(request, HttpResponse.BodyHandlers.ofString())
.thenApplyAsync(HttpResponse::statusCode)
.join();
assertThat(statusCode).isEqualTo(200);
}
@Test
public void postAsync() {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/resource"))
.header("Accept", "application/json")
.POST(HttpRequest.BodyPublishers.ofString("ping!"))
.build();
CompletableFuture<HttpResponse<String>> completableFuture =
client.sendAsync(request, HttpResponse.BodyHandlers.ofString());
completableFuture
.thenApplyAsync(HttpResponse::headers)
.thenAcceptAsync(System.out::println);
HttpResponse<String> response = completableFuture.join();
assertThat(response.statusCode()).isEqualTo(200);
}
@Test
public void postJson() throws IOException, InterruptedException {
HttpClient client = HttpClient.newHttpClient();
Book book = new Book(1, "Java HttpClient in practice");
String body = objectMapper.writeValueAsString(book);
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/resource"))
.header("Accept", "application/json")
.header("Content-Type", "application/json")
.POST(HttpRequest.BodyPublishers.ofString(body))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
assertThat(response.statusCode()).isEqualTo(200);
assertThat(objectMapper.readValue(response.body(), Book.class).id).isEqualTo(1);
}
@Test
public void basicAuthentication() throws IOException, InterruptedException {
HttpClient client = HttpClient.newHttpClient();
String encodedAuth = Base64.getEncoder()
.encodeToString(("user" + ":" + "pass").getBytes(StandardCharsets.UTF_8));
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/secure"))
.header("Authorization", "Basic " + encodedAuth)
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
assertThat(response.statusCode()).isEqualTo(200);
}
@Test
public void cookie() throws IOException, InterruptedException {
HttpClient client = HttpClient.newBuilder()
.cookieHandler(new CookieManager(null, CookiePolicy.ACCEPT_ALL))
.build();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/set-cookie"))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
String cookie = response.headers().firstValue("Set-Cookie").get();
assertThat(HttpCookie.parse(cookie).get(0).getName()).isEqualTo("SID");
request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:8081/test/resource"))
.header("Accept", "application/json")
.build();
response = client.send(request, HttpResponse.BodyHandlers.ofString());
assertThat(response.statusCode()).isEqualTo(200);
}
static class Book {
public int id;
public String title;
public Book() {
}
public Book(int id, String title) {
this.id = id;
this.title = title;
}
}
}