如何从Java执行https GET请求 [英] How to execute a https GET request from java

问题描述

我写了一个Java客户端，它可以毫无问题地执行 http GET请求.现在，我想修改此客户端以执行 https GET请求.

I wrote a Java client which executes http GET requests without any problem. Now I want to modify this client in order to execute https GET requests.

import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

private String executeGet(final String url, String proxy, int port)
        throws IOException, RequestUnsuccesfulException, InvalidParameterException {

    CloseableHttpClient httpclient = null;
    String ret = "";
    RequestConfig config;

    try {                       
        String hostname = extractHostname(url);
        logger.info("Hostname {}", hostname);

        HttpHost target = new HttpHost(hostname, 80, null);

        HttpHost myProxy = new HttpHost(proxy, port, "http");
        CredentialsProvider credsProvider = new BasicCredentialsProvider();
        credsProvider.setCredentials(
                AuthScope.ANY,
                new UsernamePasswordCredentials(USERNAME, PASSWORD));

        httpclient = HttpClients.custom().setDefaultCredentialsProvider(credsProvider).build();         
        config = RequestConfig.custom().setProxy(myProxy).build();


        HttpGet request = new HttpGet(url);
        request.setConfig(config);
        CloseableHttpResponse response = httpclient.execute(target, request);

        ...

我期望进行简单的修改，例如使用 HttpsGet 而不是 HttpGet ，但是没有，没有可用的 HttpsGet 类.

I was expecting an easy modification like using HttpsGet instead of HttpGet but no, there is no HttpsGet class available.

修改此方法以处理 https GET请求的最简单方法是什么?

What is the easiest way to modify this method in order to handle https GET requests?

推荐答案

我开发了一种解决方案，它看起来比这里发布的内容更容易

I developed a solution which looks easier that what has been posted here

private String executeGet(final String https_url, final String proxyName, final int port) {
    String ret = "";

    URL url;
    try {

        HttpsURLConnection con;
        url = new URL(https_url);

        if (proxyName.isEmpty()) {  
            con = (HttpsURLConnection) url.openConnection();
        } else {                
            Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyName, port));
            con = (HttpsURLConnection) url.openConnection(proxy);
            Authenticator authenticator = new Authenticator() {
                public PasswordAuthentication getPasswordAuthentication() {
                        return (new PasswordAuthentication(USERNAME, PASSWORD.toCharArray()));
                    }
                };
            Authenticator.setDefault(authenticator);
        }

        ret = getContent(con);

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return ret;
}

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