Question

try {
     //link below might contain offensive advertisemensts
     url = new URL("http://wasabisyrup.com/archives/GWB5lyn4FM8");
     urlConnection = (HttpURLConnection) url.openConnection();
     int c = urlConnection.getResponseCode();
.
.
.

这个代码块在java ide上编译时会给出响应代码200，但是当在带有asynctask的android上运行时会抛出403错误。这真让我抓狂。请帮忙

android代码示例：

public class MainActivity extends Activity {
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button = findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // Code here executes on main thread after user presses button
            new DownloadFilesTask().execute();
        }
    });


}

private class DownloadFilesTask extends AsyncTask<Void, Void, Void> {
    protected Void doInBackground(Void... params) {

        CookieManager cookieManager = new CookieManager();
        CookieHandler.setDefault(cookieManager);
        URL url;
        HttpURLConnection urlConnection = null;
        try {
            url = new URL("http://wasabisyrup.com/archives/GWB5lyn4FM8");
            urlConnection = (HttpURLConnection) url.openConnection();
            int c = urlConnection.getResponseCode();
            System.out.println(c);
            InputStream in = new BufferedInputStream(urlConnection.getInputStream());

        }catch(Exception e){
            e.printStackTrace();
        } finally {
            urlConnection.disconnect();
        }
        return null;
    }

    protected void onProgressUpdate(Integer... progress) {
        //setProgressPercent(progress[0]);
    }

    protected void onPostExecute() {

    }
}

输出即将获得：

I / System.out:403 W / System.err：java.io.FileNotFoundException：http://wasabisyrup.com/archives/GWB5lyn4FM8 在com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream（HttpURLConnectionImpl.java:238） W / System.err：at ml.melun.junhea.web_test.MainActivity $ DownloadFilesTask.doInBackground（MainActivity.java:47） at ml.melun.junhea.web_test.MainActivity $ DownloadFilesTask.doInBackground（MainActivity.java:35）在android.os.AsyncTask $ 2.call（AsyncTask.java:295）在java.util.concurrent.FutureTask.run（FutureTask.java:237）在android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:234）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1113） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:588）在java.lang.Thread.run（Thread.java:818）

Answer 1

使用代理并检查每种情况下发送的内容。您可能会发现一些额外的标头可能会导致问题，具体取决于后端如何处理它们。

相同的代码在java中工作，但在android中不起作用

1 个答案: