如何在 AsyncTask 或 RequestHandler.java 中添加基本的 auth java android？

Posted 2023-02-22

【中文标题】如何在 AsyncTask 或 RequestHandler.java 中添加基本的 auth java android？

【英文标题】：How to add basic auth java android in AsyncTask or RequestHandler.java?

【发布时间】：2018-01-21 08:32:50

【问题描述】：

我的问题是如何添加基本的身份验证 Java android AsyncTask？一些开发人员说它需要在RequestHandler.java 或doInBackground AsyncTask 函数中声明。以下是我的代码：

private void loginTask(String _username, String _password)
        final String username = _username;
        final String password = _password;

        class LoginTask extends AsyncTask<Void,Void,String> 
            ProgressDialog loading;
            @Override
            protected void onPreExecute() 
                super.onPreExecute();
                loading = ProgressDialog.show(LoginActivity.this,"Fetching...","Wait...",false,false);
            

            @Override
            protected void onPostExecute(String s) 
                super.onPostExecute(s);
                loading.dismiss();
            

            @Override
            protected String doInBackground(Void... params) 
                RequestHandler rh = new RequestHandler();
                String s = rh.sendGetRequest(App.URL_AUTHENTICATION);
                Toast.makeText(LoginActivity.this, s.toString(), Toast.LENGTH_SHORT).show();
                return s;
            
        
        LoginTask gt = new LoginTask();
        gt.execute();
    

RequestHandler 类：https://github.com/IntellijSys/AndroidToDoList/blob/master/app/src/main/java/my/intellij/androidtodolist/RequestHandler.java

【问题讨论】：

这段代码不会编译，你不能在一个方法中创建一个类，而且你的用户名和密码变量是多余的，你的 toast 应该是在onPostExecute 上调用的，最后这是一个泄漏的实现因为您的 asynctask 将包含对您的父类的隐式引用，因此请考虑使用 WeakReference 或避免 AsyncTask 的非静态内部类。

我会调整的那个。对于基本身份验证，仍然没有任何想法。

【参考方案1】：

试试这个

 RequestHandler rh = new RequestHandler();
            // your basic auth username and password
            rh.setBasicAuth("username","password");
String s = rh.sendGetRequest(App.URL_AUTHENTICATION);

具有基本身份验证的 RequestHandler 类

import android.util.Base64;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;

/**
 * Created by ZERO on 16/08/2016.
 */
public class RequestHandler 

    private String username;
    private String password;

    //Method to send httpPostRequest
    //This method is taking two arguments
    //First argument is the URL of the script to which we will send the request
    //Other is an HashMap with name value pairs containing the data to be send with the request
    public String sendPostRequest(String requestURL,
                                  HashMap<String, String> postDataParams) 
        URL url;

        //StringBuilder object to store the message retrieved from the server
        StringBuilder sb = new StringBuilder();
        try 
            //Initializing Url
            url = new URL(requestURL);

            //Creating an httmlurl connection
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//set Basic auth
            processBasicAuth(conn);

            //Configuring connection properties
            conn.setReadTimeout(15000);
            conn.setConnectTimeout(15000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);

            //Creating an output stream
            OutputStream os = conn.getOutputStream();

            //Writing parameters to the request
            //We are using a method getPostDataString which is defined below
            BufferedWriter writer = new BufferedWriter(
                    new OutputStreamWriter(os, "UTF-8"));
            writer.write(getPostDataString(postDataParams));

            writer.flush();
            writer.close();
            os.close();
            int responseCode = conn.getResponseCode();

            if (responseCode == HttpsURLConnection.HTTP_OK) 

                BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                sb = new StringBuilder();
                String response;
                //Reading server response
                while ((response = br.readLine()) != null) 
                    sb.append(response);
                
            

         catch (Exception e) 
            e.printStackTrace();
        
        return sb.toString();
    

    private void processBasicAuth(HttpURLConnection conn) 
        if (username != null && password != null) 
            try 
                String userPassword = username + ":" + password;
                byte[] data = userPassword.getBytes("UTF-8");
                String base64 = Base64.encodeToString(data, Base64.DEFAULT);
                conn.setRequestProperty("Authorization", "Basic " + base64);
             catch (UnsupportedEncodingException e) 
                e.printStackTrace();
            
        
    

    public String sendGetRequest(String requestURL) 
        StringBuilder sb = new StringBuilder();
        try 
            URL url = new URL(requestURL);
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            //set Basic auth
            processBasicAuth(con);
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

            String s;
            while ((s = bufferedReader.readLine()) != null) 
                sb.append(s + "\n");
            
         catch (Exception e) 
        
        return sb.toString();
    

    public String sendGetRequestParam(String requestURL, String id) 
        StringBuilder sb = new StringBuilder();
        try 
            URL url = new URL(requestURL + id);
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

            String s;
            while ((s = bufferedReader.readLine()) != null) 
                sb.append(s + "\n");
            
         catch (Exception e) 
        
        return sb.toString();
    

    private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException 
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for (Map.Entry<String, String> entry : params.entrySet()) 
            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
        

        return result.toString();
    

    public void setBasicAuth(String username, String password) 
        this.username = username;
        this.password = password;
    

【讨论】：

我先试试

这段代码rh.setBasicAuth("username","password"); 只是设置了变量，但之后它什么也不做。您需要在 setBasicAuth 方法中添加更多内容。

@Enzokie 看这里 //set Basic auth processBasicAuth(conn);

是的，但它如何与 processBasicAuth() 交互？

@MohammadNurdin 当你调用 sendGetRequest();