HttpPost Use Proxy To Target

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HttpPost Use Proxy To Target

這篇介紹在Java如何透過HttpHost via Proxy to Target。

Proxy url

1
http://user:[email protected]:9988

Sample code

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package org.apache.http.examples.client;

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;
import org.apache.http.util.EntityUtils;

/**
 * A simple example that uses HttpClient to execute an HTTP request
 * over a secure connection tunneled through an authenticating proxy.
 */
public class ClientProxyAuthentication {

    public static void main(String[] args) throws Exception {
        CredentialsProvider credsProvider = new BasicCredentialsProvider();
        credsProvider.setCredentials(
                new AuthScope("localhost", 8888),
                new UsernamePasswordCredentials("squid", "squid"));
        credsProvider.setCredentials(
                new AuthScope("httpbin.org", 80),
                new UsernamePasswordCredentials("user", "passwd"));
        CloseableHttpClient httpclient = HttpClients.custom()
                .setDefaultCredentialsProvider(credsProvider).build();
        try {
            HttpHost target = new HttpHost("httpbin.org", 80, "http");
            HttpHost proxy = new HttpHost("localhost", 8888);

            RequestConfig config = RequestConfig.custom()
                .setProxy(proxy)
                .build();
            HttpGet httpget = new HttpGet("/basic-auth/user/passwd");
            httpget.setConfig(config);

            System.out.println("Executing request " + httpget.getRequestLine() + " to " + target + " via " + proxy);

            CloseableHttpResponse response = httpclient.execute(target, httpget);
            try {
                System.out.println("----------------------------------------");
                System.out.println(response.getStatusLine());
                System.out.println(EntityUtils.toString(response.getEntity()));
            } finally {
                response.close();
            }
        } finally {
            httpclient.close();
        }
    }
}