Question

我需要知道如何设置代理并确认它是否正常工作。

我做了一个看起来像这样的测试程序：

enter image description here

您可以在其中指定代理地址和端口号。

（我找到了地址和端口： http://www.freeproxylists.net/）

当选中“使用代理”时，SOAP调用看起来像这样：

        Socket socket = new Socket();
        SocketAddress sockaddr = new InetSocketAddress(PROXY_ADDRESS, PROXY_PORT);
        socket.connect(sockaddr, 10000);
        Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(socket.getInetAddress(), PROXY_PORT));
        URL url = new URL(urlStr);
        HttpURLConnection uc = (HttpURLConnection) url.openConnection(proxy);
        return connection.call(message, uc);

这里的问题是最后一行SOAPConnection.call(..)不允许HttpURLConnection作为输入，从而给出：

错误的endPoint类型

知道如何将代理地址添加到SOAP调用并验证代理是否正在使用？

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.MalformedURLException;
import java.net.Proxy;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.URL;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.xml.soap.MessageFactory;
import javax.xml.soap.SOAPConnection;
import javax.xml.soap.SOAPConnectionFactory;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;

public class TestProxy implements ActionListener {

    public JTextField proxyField;
    public JTextField portField;
    public JCheckBox useProxy;

    // GUI
    public TestProxy() {
        JFrame f = new JFrame("Proxy tester");
        f.getContentPane().setLayout(new BoxLayout(f.getContentPane(), BoxLayout.Y_AXIS));

        proxyField = new JTextField("103.247.43.218");
        portField = new JTextField("8081");
        useProxy = new JCheckBox("Use Proxy");

        JButton b = new JButton("Connect!");
        b.addActionListener(this);

        f.getContentPane().add(proxyField);
        f.getContentPane().add(portField);
        f.getContentPane().add(useProxy);
        f.getContentPane().add(b);

        f.pack();
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

    // ACTION
    @Override
    public void actionPerformed(ActionEvent e) {

        SOAPMessage response = null;
        try {
            SOAPMessage msg = createSOAPRequest();
            String urlStr = "http://www.webservicex.net/CurrencyConvertor.asmx?WSDL";
            response = sendSOAPMessage(msg, urlStr);
        } catch (MalformedURLException e1) {
            e1.printStackTrace();
        } catch (SOAPException e1) {
            e1.printStackTrace();
        } catch (Exception e2) {
            e2.printStackTrace();
        }
        if (response == null)
            JOptionPane.showMessageDialog(null, "Null returned...");
        else
            JOptionPane.showMessageDialog(null, "Returned response!!!");
    }

    // SOAP CALL
    public SOAPMessage sendSOAPMessage(SOAPMessage message, String urlStr) throws SOAPException, MalformedURLException {

        String PROXY_ADDRESS = proxyField.getText();
        int PROXY_PORT = Integer.parseInt(portField.getText());
        try {
            SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
            SOAPConnection connection = factory.createConnection();
            if (useProxy.isSelected()) {
                Socket socket = new Socket();
                SocketAddress sockaddr = new InetSocketAddress(PROXY_ADDRESS, PROXY_PORT);
                socket.connect(sockaddr, 10000);
                Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(socket.getInetAddress(), PROXY_PORT));
                URL url = new URL(urlStr);
                HttpURLConnection uc = (HttpURLConnection) url.openConnection(proxy);
                // This "call" is not allowed!!
                return connection.call(message, uc);
            } else {
                return connection.call(message, urlStr);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    // SOAP MESSAGE
    private static SOAPMessage createSOAPRequest() throws Exception {
        MessageFactory messageFactory = MessageFactory.newInstance();
        SOAPMessage soapMessage = messageFactory.createMessage();
        return soapMessage;
    }

    public static void main(String[] args) {
        new TestProxy();
    }
}

Answer 1

使用proxy：

的sendSOAPMessage方法

public static SOAPMessage sendSOAPMessage(SOAPMessage message, String url, final Proxy p) throws SOAPException, MalformedURLException {
    SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
    SOAPConnection connection = factory.createConnection();

    URL endpoint = new URL(null, url, new URLStreamHandler() {
        protected URLConnection openConnection(URL url) throws IOException {
            // The url is the parent of this stream handler, so must
            // create clone
            URL clone = new URL(url.toString());

            URLConnection connection = null;
            if (p.address().toString().equals("0.0.0.0/0.0.0.0:80")) {
                connection = clone.openConnection();
            } else
                connection = clone.openConnection(p);
            connection.setConnectTimeout(5 * 1000); // 5 sec
            connection.setReadTimeout(5 * 1000); // 5 sec
            // Custom header
            connection.addRequestProperty("Developer-Mood", "Happy");
            return connection;
        }
    });

    try {
        SOAPMessage response = connection.call(message, endpoint);
        connection.close();
        return response;
    } catch (Exception e) {
        // Re-try if the connection failed
        SOAPMessage response = connection.call(message, endpoint);
        connection.close();
        return response;
    }
}

Answer 2

您可以使用Java Proxy类 - 更多详细信息here。实质上，您可以尝试指定的Proxy地址是否为reachable。如果是，您可以建立URL连接（如下所示的HTTP连接或您自己的协议 - 如SOAP）修改

使用SocketAddress尝试使用端口值

Socket socket = null; try { SocketAddress sockaddr = new InetSocketAddress(PROXY_ADDRESS, PROXY_PORT); socket = new Socket(); socket.connect(sockaddr, 10000); Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress( socket.getInetAddress(), PROXY_PORT)); if (socket.getInetAddress().isReachable(10000)) { URL url = new URL("http://www.popofibo.com"); HttpURLConnection uc = (HttpURLConnection) url .openConnection(proxy); System.out.println("Content: " + uc.getContentType()); uc.connect(); } } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { socket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }

在上面的示例中，您将建立代理连接并检查InetAddress是否可访问。如果是，您可以使用代理建立http连接。

编辑：由于isReachable()的可信度值得怀疑，您可以尝试捕获异常并建立自己的boolean标记，以下是工作示例。

在这里，您尝试通过proxy连接使用其地址和端口连接Socket并捕获异常。我使用自己的代理服务器测试了这两个示例并且它可以正常工作，但在示例中您提到的IP肯定会失败。

public static void main(String[] args) { Socket socket = new Socket(); boolean proxyReachable = false; SocketAddress sockaddr = new InetSocketAddress(PROXY_ADDRESS, PROXY_PORT); try { socket.connect(sockaddr, 10000); proxyReachable = true; } catch (SocketTimeoutException e) { proxyReachable = false; } catch (IOException e) { proxyReachable = false; } if (proxyReachable) { try { Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress( socket.getInetAddress(), PROXY_PORT)); URL url = new URL("http://www.popofibo.com"); HttpURLConnection uc = (HttpURLConnection) url .openConnection(proxy); System.out.println("Content: " + uc.getContentType()); uc.connect(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } try { socket.close(); } catch (IOException e) { e.printStackTrace(); } }

输出（使用有效的代理地址/端口）：

Content: text/html; charset=UTF-8

在Java中通过代理发送SOAP消息

2 个答案: