commons-httpclient 3.1 - httpclient跳过https请求的验证

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mob604756e5abbc 2021-10-26 11:05:00

commons-httpclient 3.1 这个包比较老，已经淘汰了。但好多老项目依然在用这个包。

有一个项目，第三方https，用的自建证书（无耻），导致请求报错：

使用HttpClient发送Https请求时，出现异常为：
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

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一、因为在使用https发送请求的时候会涉及，验证方式。但是这种方式在使用的时候很不方便。特别是在请求外部接口的时候，所以这我写了一个跳过验证的方式。（供参考）

二、加入包，这里用的是commons-httpclient 3.1 的包。一般请求采用最新的httpclient4.5就可以了

<dependency>
  <groupId>commons-httpclient</groupId>
  <artifactId>commons-httpclient</artifactId>
  <version>3.1</version>
</dependency>

三、这里我们实现3个类

1、MyX509TrustManager（这个方法直接实现X509TrustManager，X509TrustManager在javax.net.ssl.X509TrustManager里面）

这里直接实现不用改任何东西

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.X509TrustManager;

public class MyX509TrustManager implements X509TrustManager {
    /* (non-Javadoc)
    * @see javax.net.ssl.X509TrustManager#checkClientTrusted(java.security.cert.X509Certificate[], java.lang.String)
    */
    public void checkClientTrusted(X509Certificate[] arg0, String arg1)
            throws CertificateException {

    }
    /* (non-Javadoc)
     * @see javax.net.ssl.X509TrustManager#checkServerTrusted(java.security.cert.X509Certificate[], java.lang.String)
     */
    public void checkServerTrusted(X509Certificate[] arg0, String arg1)
            throws CertificateException {

    }
    /* (non-Javadoc)
     * @see javax.net.ssl.X509TrustManager#getAcceptedIssuers()
     */
    public X509Certificate[] getAcceptedIssuers() {
        return null;
    }
}

2、MySecureProtocolSocketFactory（这里我们需要用到SSLContext，还需要改写一个实现SecureProtocolSocketFactory的方法）

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import org.apache.commons.httpclient.ConnectTimeoutException;
import org.apache.commons.httpclient.HttpClientError;
import org.apache.commons.httpclient.params.HttpConnectionParams;
import org.apache.commons.httpclient.protocol.ControllerThreadSocketFactory;
import org.apache.commons.httpclient.protocol.SecureProtocolSocketFactory;

public class MySecureProtocolSocketFactory implements SecureProtocolSocketFactory {

    //这里添加一个属性，主要目的就是来获取ssl跳过验证
    private SSLContext sslContext = null;
    /**
     * Constructor for MySecureProtocolSocketFactory.
     */
    public MySecureProtocolSocketFactory() {
    }
    /**
     * 这个创建一个获取SSLContext的方法，导入MyX509TrustManager进行初始化
     * @return
     */
    private static SSLContext createEasySSLContext() {
        try {
            SSLContext context = SSLContext.getInstance("SSL");
            context.init(null, new TrustManager[] { new MyX509TrustManager() },
                    null);
            return context;
        } catch (Exception e) {
            throw new HttpClientError(e.toString());
        }
    }

    /**
     * 判断获取SSLContext
     * @return
     */
    private SSLContext getSSLContext() {
        if (this.sslContext == null) {
            this.sslContext = createEasySSLContext();
        }
        return this.sslContext;
    }
    //后面的方法基本上就是带入相关参数就可以了
    /*
     * (non-Javadoc)
     *
     * @see org.apache.commons.httpclient.protocol.ProtocolSocketFactory#createSocket(java.lang.String,
     *      int, java.net.InetAddress, int)
     */
    public Socket createSocket(String host, int port, InetAddress clientHost,int clientPort) throws IOException, UnknownHostException {
        return getSSLContext().getSocketFactory().createSocket(host, port,clientHost, clientPort);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.apache.commons.httpclient.protocol.ProtocolSocketFactory#createSocket(java.lang.String,
     *      int, java.net.InetAddress, int,
     *      org.apache.commons.httpclient.params.HttpConnectionParams)
     */
    public Socket createSocket(final String host, final int port,final InetAddress localAddress, final int localPort,
                               final HttpConnectionParams params) throws IOException,UnknownHostException, ConnectTimeoutException {
        if (params == null) {
            throw new IllegalArgumentException("Parameters may not be null");
        }
        int timeout = params.getConnectionTimeout();
        if (timeout == 0) {
            return createSocket(host, port, localAddress, localPort);
        } else {
            return ControllerThreadSocketFactory.createSocket(this, host, port,localAddress, localPort, timeout);
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see SecureProtocolSocketFactory#createSocket(java.lang.String,int)
     */
    public Socket createSocket(String host, int port) throws IOException,UnknownHostException {
        return getSSLContext().getSocketFactory().createSocket(host, port);
    }

    /*
     * (non-Javadoc)
     *
     * @see SecureProtocolSocketFactory#createSocket(java.net.Socket,java.lang.String,int,boolean)
     */
    public Socket createSocket(Socket socket, String host, int port,boolean autoClose) throws IOException, UnknownHostException {
        return getSSLContext().getSocketFactory().createSocket(socket, host,port, autoClose);
    }
}

3、然后就是httpclient了，这里实现的方式很单间了，只要声明MySecureProtocolSocketFactory加入就可以了Protocol

import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.protocol.Protocol;
import org.apache.commons.httpclient.protocol.ProtocolSocketFactory;
/*
 * 利用HttpClient进行post请求的工具类
 */
public class HttpClientUtil {

    public static String doGet(String url) throws Exception {
        //声明
        ProtocolSocketFactory fcty = new MySecureProtocolSocketFactory();
        //加入相关的https请求方式
        Protocol.registerProtocol("https", new Protocol("https", fcty, 443));
        //发送请求即可
        org.apache.commons.httpclient.HttpClient httpclient = new org.apache.commons.httpclient.HttpClient();
        GetMethod httpget = new GetMethod(url);
        System.out.println("======url:" + url);
        try {
            httpclient.executeMethod(httpget);
            return httpget.getResponseBodyAsString();
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new Exception(ex.getMessage());
        } finally {
            httpget.releaseConnection();
        }
    }

}