Question

我正在尝试从网址下载视频并获得此例外：

java.net.ProtocolException: Too many redirects

以下是我的代码。我在这做错了什么？

private void savePrivateExternalFile(String fileURL, String fName)
{
    CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL));
    HttpURLConnection connection = null;
    URL url = null;
    long startTime = System.currentTimeMillis();

    try
    {
        url = new URL(fileURL);
        connection = (HttpURLConnection) url.openConnection();
        connection.addRequestProperty(BsharpConstant.WEB_SERVICES_COOKIES, cookie);
        connection.setDoOutput(true);
        connection.connect();

        File folderDir = null;
        if (clickedItemId == 0) folderDir = new File(getExternalFilesDir("Product") + "/Brochure");
        else folderDir = new File(getExternalFilesDir("Product") + "/Videos");

        File file = new File(folderDir, fName);

        if (file.exists()) file.delete();

        if (folderDir.isDirectory() || folderDir.mkdirs())
        {
            InputStream inputStream = connection.getInputStream(); // Exception is thrown here !!
            FileOutputStream fileOutputStream = new FileOutputStream(folderDir + "/" + fName);

            int len = 0;
            byte[] buffer = new byte[1024];

            if (clickedItemId == 1)
            {
                while ((le = inputStream.read(buffer)) != -1)
                {
                    fileOutputStream.write(buffer, 0, len);
                }
            }
            else
            {
                BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream, 1024 * 50);
                while ((len = bufferedInputStream.read(buffer)) != -1)
                {
                    fileOutputStream.write(buffer, 0, len);
                }
                bufferedInputStream.close();
                Log.i("Download", "download completed in " + ((System.currentTimeMillis() - startTime) / 1000) + " sec");
            }

            fileOutputStream.close();
            inputStream.close();

            editSharedPreferences.putString(fName, fName);
            editSharedPreferences.commit();
        }
        else
        {
            Toast.makeText(getApplicationContext(), BsharpUserMessage.UNABLE_TO_CREATE_THE_FOLDER, Toast.LENGTH_LONG).show();
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

LogCat：

01-07 14:21:36.163: W/System.err(25391): java.net.ProtocolException: Too many redirects
01-07 14:21:36.163: W/System.err(25391):    at l  libcore.net.http.HttpURLConnectionImpl.processResponseHeaders(HttpURLConnectionImpl.java:368)
01-07 14:21:36.163: W/System.err(25391):    at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:292)
01-07 14:21:36.163: W/System.err(25391):    at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
01-07 14:21:36.173: W/System.err(25391):    at com.abc.xyz.ProductBrochureActivity.savePrivateExternalFile(ProductBrochureActivity.java:231)
01-07 14:21:36.173: W/System.err(25391):    at com.abc.xyz.ProductBrochureActivity.access$7(ProductBrochureActivity.java:200)
01-07 14:21:36.173: W/System.err(25391):    at com.abc.xyz.ProductBrochureActivity$2.run(ProductBrochureActivity.java:140)
01-07 14:21:36.173: W/System.err(25391):    at java.lang.Thread.run(Thread.java:856)

`

Answer 1

我知道这是一岁，但它出来了，没有答案所以..

我遇到了同样的问题，虽然链接是在私有firefox中立即打开的。此外，这只发生在一台设备上，其他3台测试设备没有这样的问题。

This answer worked for me：

这是代码（我更正了几个拼写错误并添加了StringBuilder而不是连接）：

        HttpClient httpClient = new DefaultHttpClient();
        httpClient.getParams().setParameter(ClientPNames.ALLOW_CIRCULAR_REDIRECTS, true); 
        HttpGet httpGet = new HttpGet(webLink);
        HttpResponse response = httpClient.execute(httpGet);
        StringBuilder responseBuilder = new StringBuilder();
        BufferedReader buffer = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
        String s = "";
        while ((s = buffer.readLine()) != null) 
            responseBuilder.append(s);

        return responseBuilder.toString();

java.net.ProtocolException：Android中的重定向过多

1 个答案: