302在Android中使用Dropbox將http重定向到https超鏈接

我有一個應用程序，它在正常情況下從雲存儲中加載和播放音樂沒有問題，除非涉及到Dropbox簡短鏈接。這些鏈接使用302頭重定向到HTTPS鏈路： -302在Android中使用Dropbox將http重定向到https超鏈接

302實測值的資源被發現在 https://www.dropbox.com/s/jhzh3woy3qxblck/05%20-%20Cinema.ogg;你應該自動重定向你的。

此代碼的結構是一個雙靜態方法，首先[按時間順序]查找重定向，第二個將數據獲取到文件。

我試圖讓它工作，因爲第二個鏈接當前使我從Dropbox下載了大量不相關的HTML，而不是所需的文件本身！

/** 
* Return an Audio File from a URL String 
* throws IOException 
* 
* @param url the URL which provides the target 
* @return File - audio file 
*/ 
public static File getAudioFile(String urlString, File f) { 
    String newUrl = null; 
    try { 
     newUrl = getRedirect(urlString); 
    } catch (ClientProtocolException e) { 
     Log.e(TAG, "ClientProtocolException Error getting Redirect ", e); 
    } catch (IOException e) { 
     Log.e(TAG, "IOException Error getting Redirect", e); 
    } 
    if (newUrl != null) { 
     urlString = newUrl; 
    } 
    else { 
     Log.i(TAG, "IOException Error getting Redirect because its null"); 
    } 

    try { 
     URL url = new URL(urlString); 
     HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
     conn.setInstanceFollowRedirects(true); 
     conn.setReadTimeout(40 * 1000); 
     conn.setConnectTimeout(45 * 1000); 
     conn.setRequestMethod("GET"); 
     conn.setRequestProperty("Connection", "close"); 
     conn.setDoInput(true); 
     conn.setDefaultUseCaches(true); 
     // Starts the input from the URL 
     conn.connect(); 
     InputStream is = conn.getInputStream(); 
     BufferedInputStream bis = new BufferedInputStream(is); 
     BufferedOutputStream bof = new BufferedOutputStream(new FileOutputStream(f)); 

     // write the inputStream to the FileOutputStream 
     byte [] bytes = new byte [409600]; 
     int block; 
     while((block = bis.read(bytes, 0, bytes.length)) > 0) { 
      bof.write(bytes, 0, block); 
      Log.d(TAG, "Write a block of " + block); 
     } 

     bof.flush(); 
     bof.close(); 
     bis.close(); 
     is.close(); 
     conn.disconnect(); 
    } catch (Exception e) { 
     Log.e(TAG, "Error getting Audio File", e); 
    } 
    return f; 
} 
/** 
* Get the new url from a http redirect 
* throws IOException 
* 
* @param url the URL which provides the target 
* @return url - the single url redirect 
*/ 
public static String getRedirect(String urlString) throws ClientProtocolException, IOException { 
    HttpParams httpParameters = new BasicHttpParams(); 
    HttpClientParams.setRedirecting(httpParameters, false); 

    HttpClient httpClient = new DefaultHttpClient(httpParameters);  
    HttpGet httpget = new HttpGet(urlString); 
    HttpContext context = new BasicHttpContext(); 

    HttpResponse response = httpClient.execute(httpget, context); 

    // If we didn't get a '302 Found' we aren't being redirected. 
    if (response.getStatusLine().getStatusCode() != HttpStatus.SC_MOVED_TEMPORARILY) 
     throw new IOException(response.getStatusLine().toString()); 

    Header loc[] = response.getHeaders("Location"); 
    return loc.length > 0 ? loc[loc.length -1].getValue() : null; 
}

來源

2013-02-07 loser114491

我獨自這個問題了一會兒。最終看起來，一些簡短的超鏈接[在我的案例中的Dropbox音頻]實際上重定向到HTML下載屏幕。這是沒用的什麼鏈接應該做恕我直言。 – loser114491

我遇到了同樣的問題。我發現我可以從得到新的URL urlConnection.getHeaderField（「Location」）; 請參考下面的代碼。

{ 
    url = new URL(urlString); 
    urlConnection = (HttpURLConnection) url.openConnection(); 
    urlConnection.connect(); 
    String ResponseCode = urlConnection.getResponseCode(); 
    String ContentType = urlConnection.getContentType(); 
    if (result.ResponseCode == HttpURLConnection.HTTP_MOVED_TEMP || result.ResponseCode == HttpURLConnection.HTTP_MOVED_PERM) 
    { 
     String Location = urlConnection.getHeaderField("Location"); 
    } 
}

問候，傑克

來源

2013-05-07 11:37:50

302在Android中使用Dropbox將http重定向到https超鏈接

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