Java 9의 HTTP/2 클라이언트란 무엇입니까?

Http/2 클라이언트 API는 Java 9에서 도입되었습니다. Http/1.1보다 성능이 더 향상되었으며 서버 측 푸시 이벤트도 지원합니다. 이를 통해 웹사이트를 효율적으로 그리고 더 빠르게 탐색할 수 있습니다. Http/2 Client는 jdk.incubator.httpclient라는 인큐베이터 모듈입니다. 이는 모든 기능이 아직 완성되지 않았으며 향후 Java 버전에 새로운 변경 사항이 나타날 수 있음을 의미합니다. 모든 공개 API가 포함된 jdk.incubator.http 패키지를 내보냅니다.

Http/2 클라이언트를 사용하려면 incubator 모듈을 사용해야 하며, 아래와 같이 “–add-modules” 명령을 사용하여 httpclient module을 JShell에 전달하면 됩니다

<strong>C:\>jshell -v --add-modules jdk.incubator.httpclient
| Welcome to JShell -- Version 9.0.4
| For an introduction type: /help intro</strong>

예

<strong>jshell> import jdk.incubator.http.*;

jshell> HttpClient httpClient = HttpClient.newHttpClient();
httpClient ==> jdk.incubator.http.HttpClientImpl@534df152
| created variable httpClient : HttpClient

jshell> HttpRequest httpRequest = HttpRequest.newBuilder().uri(new URI("https: //www.google.com")).GET().build();
httpRequest ==> https://www.google.com GET
| created variable httpRequest : HttpRequest

jshell> HttpResponse httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandler.asString());
httpResponse ==> jdk.incubator.http.HttpResponseImpl@609cd4d8
| created variable httpResponse : HttpResponse

jshell> System.out.println(httpResponse.statusCode());
403</strong>
<strong>
jshell> System.out.println(httpResponse.body());
Apache HTTP Server Test Page powered by CentOS
Testing 123..
<p class="lead">This page is used to test the proper operation of the Apache HTTP server after it has been insta
lled. If you can read this page it means that this site is working properly. Thi
s server is powered by CentOS.</p><p class="lead">The website you just visited is either experiencing problems or is undergoing routine maintenance.</p>If you would like to let the administrators of this website know that you&#39;ve seen this page instead of the page you expected, you should send them e-mail. In general, mail sent to the name "webmast
er" and directed to the website&#39;s domain should reach the appropriate person.For example, if you experienced problems while visiting www.example.com, you should send e-mail to "webmaster@example
.com".
Are you the Administrator?
<p>You should add your website content to the directory /var/www/html/.</p><p>To prevent this page from ever being used, follow the instructions in the file /etc/httpd/conf.d/welcome.conf.</p>Promoting Apache and CentOS
</strong><p><strong>You are free to use the images below
on Apache and CentOS Linux powered HTTP servers. Thanks for using Apache and CentOS!</strong></p>

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