java - 如何从Java执行https GET请求

我编写了一个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。

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);

        ...

我期待一个简单的修改，例如使用HttpsGet而不是HttpGet，但是没有，没有HttpsGet类可用。

修改此方法以处理https GET请求的最简单方法是什么？

最佳答案

这是我在Java中快速又肮脏的https客户端，它会忽略无效的证书并使用BASIC进行身份验证

import java.io.IOException;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;

    public static HttpsURLConnection getConnection(boolean ignoreInvalidCertificate, String user, String pass, HttpRequestMethod httpRequestMethod, URL url) throws KeyManagementException, NoSuchAlgorithmException, IOException{
        SSLContext ctx = SSLContext.getInstance("TLS");
        if (ignoreInvalidCertificate){
            ctx.init(null, new TrustManager[] { new InvalidCertificateTrustManager() }, null);
        }
        SSLContext.setDefault(ctx);

        String authStr = user+":"+pass;
        String authEncoded = Base64.encodeBytes(authStr.getBytes());

        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();

        connection.setRequestMethod("GET");
        connection.setDoOutput(true);
        connection.setRequestProperty("Authorization", "Basic " + authEncoded);

        if (ignoreInvalidCertificate){
            connection.setHostnameVerifier(new InvalidCertificateHostVerifier());
        }

        return connection;
    }

-

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSession;

public class InvalidCertificateHostVerifier implements HostnameVerifier{
    @Override
    public boolean verify(String paramString, SSLSession paramSSLSession) {
        return true;
    }
}

-

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.X509TrustManager;

/**
 * ignore invalid Https certificate from OPAM
 * <p>see http://javaskeleton.blogspot.com.br/2011/01/avoiding-sunsecurityvalidatorvalidatore.html
 */
public class InvalidCertificateTrustManager implements X509TrustManager{
    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return null;
    }

    @Override
    public void checkServerTrusted(X509Certificate[] paramArrayOfX509Certificate, String paramString) throws CertificateException {

    }

    @Override
    public void checkClientTrusted(X509Certificate[] paramArrayOfX509Certificate, String paramString) throws CertificateException {
    }
}

也许这是您可以开始的。

当然，由于已建立连接，因此可以使用以下方法检索响应内容

InputStream content = (InputStream) connection.getInputStream();