android - UrlConnection 使用 Java 代码但不适用于 Android - 在 Digest Authenticated Server 中使用

Question

我正在使用 URLConnection 连接到主服务器。服务器实现摘要认证。如果我使用 java 库连接到服务器，则连接成功。但是，如果我对 android 使用相同的代码，连接将被拒绝，原因是 - 用户名和密码不匹配。

这是我的 Java 项目的代码:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.net.URL;
import java.net.URLConnection;

public class Connect {

    static StringBuilder sb;

    public static void main(String args[]) {

        String strURL = "http://hostserver/";
        final String username = "username";
        final String password = "password";

        Authenticator.setDefault(new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {
                PasswordAuthentication pa = new PasswordAuthentication (username, password.toCharArray());
                System.out.println(pa.getUserName() + ":" + new String(pa.getPassword()));
                return pa;
            }
        });

        BufferedReader in = null;
        StringBuffer sb = new StringBuffer();

        try {
            URL url = new URL(strURL);

            URLConnection connection = url.openConnection();

            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));

            String line;
            while ((line = in.readLine()) != null) {
                sb.append(line);
            }

        } catch (java.net.ProtocolException e) {
            sb.append("User Or Password is wrong!");

            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e) {
                System.out.println("Exception");
            }
        }

        System.out.println("The Data is: " + sb.toString());
    }
}

上面的代码工作正常，我能够连接到我的主机服务器，它正在实现摘要式身份验证。我无法使用与 Android 相同的代码进行连接。这是我的安卓代码:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.net.URL;
import java.net.URLConnection;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class Connect extends Activity {

    static StringBuilder sb;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        String strURL = "http://hostserver/";
        final String username = "username";
        final String password = "password";

        Authenticator.setDefault(new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {
                PasswordAuthentication pa = new PasswordAuthentication (username, password.toCharArray());
                // System.out.println(pa.getUserName() + ":" + new String(pa.getPassword()));
                return pa;
            }
        });

        BufferedReader in = null;
        StringBuffer sb = new StringBuffer();

        try {
            URL url = new URL(strURL);
            URLConnection connection = url.openConnection();

            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));

            String line;
            while ((line = in.readLine()) != null) {
                sb.append(line);
            }

        } catch (java.net.ProtocolException e) {
            sb.append("User Or Password is wrong!");
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e) {
                System.out.println("Exception");
            }
        }

        Log.d("DATA", sb.toString());
    }
}

如果相同的代码适用于 Java，那么它也应该适用于 Android。

代码在 Authenticator 中循环，因为它发现用户名和密码由于某种原因在 Android 代码中不匹配，而实际上是正确的。该代码非常适合 Java 项目。

Answer 1

while ((line = in.readLine()) != null) {  
    sb.append(line);
}

去掉这段代码，只写

line = in.readLine().toString();
sb.append(line);