下載意外的流錯誤結束？

Question

可能重複：
Android:「Unexpected end of stream」 exception downloading large files

我downloding大約一個文件。 5MB使用HttpURLConnection類，但downlod在半路上我在這行我的代碼得到錯誤的「流意外結束」：

     while ((count = input.read(data)) > 0) { 

這裏是LOG：

11-20 16:05:55.749: ERROR/PRINTSTACK(3425): STACK:unexpected end of stream 
11-20 16:05:55.749: WARN/System.err(3425): java.io.IOException: unexpected end of stream 
11-20 16:05:55.749: WARN/System.err(3425):  at org.apache.harmony.luni.internal.net.www.protocol.http.FixedLengthInputStream.read(FixedLengthInputStream.java:47) 
11-20 16:05:55.749: WARN/System.err(3425):  at java.io.BufferedInputStream.read(BufferedInputStream.java:319) 
11-20 16:05:55.749: WARN/System.err(3425):  at java.io.FilterInputStream.read(FilterInputStream.java:133) 
11-20 16:05:55.759: WARN/System.err(3425):  at com.conjure.skiproj.DownloadService$Job.process(DownloadService.java:265) 
11-20 16:05:55.759: WARN/System.err(3425):  at com.conjure.skiproj.DownloadService$1.run(DownloadService.java:193) 
11-20 16:05:55.759: WARN/System.err(3425):  at java.lang.Thread.run(Thread.java:1019) 

幫助！ 1

編輯：在代碼的詳細信息建立的InputStream：

HttpURLConnection conexion = (HttpURLConnection)url.openConnection(); 
         conexion.setRequestMethod("GET"); 
         conexion.setReadTimeout(20000); 
         conexion.connect(); 
         File file = new File(root.getAbsolutePath()+"/", fileName); 

          int lenghtOfFile = conexion.getContentLength(); 

          InputStream input = new BufferedInputStream(url.openStream()); 

          OutputStream output = new FileOutputStream(file); 

          byte data[] = new byte[8192]; 
........................... 

編輯2：上得了在下一行下載的25％，新的錯誤IndexOutOfBoundsException異常：下面

output.write(data, 0, count); 

LOG：

11-20 17:47:02.311: ERROR/totaltotal(303): 24 
11-20 17:47:02.311: INFO/System.out(303): countcountcount:4332 
11-20 17:47:02.330: ERROR/totaltotal(303): 24 
11-20 17:47:02.330: INFO/System.out(303): countcountcount:2904 
11-20 17:47:02.330: ERROR/totaltotal(303): 25 
11-20 17:47:02.330: INFO/System.out(303): countcountcount:1452 
11-20 17:47:02.330: ERROR/totaltotal(303): 25 
11-20 17:47:02.650: INFO/System.out(303): countcountcount:4356 
11-20 17:47:02.650: ERROR/totaltotal(303): 25 
11-20 17:47:02.650: INFO/System.out(303): countcountcount:-1 
11-20 17:47:02.660: ERROR/totaltotal(303): 25 
11-20 17:47:02.892: DEBUG/dalvikvm(303): GC_FOR_MALLOC freed 10770 objects/490896 bytes in 143ms 
11-20 17:47:03.060: ERROR/PRINTSTACK(303): STACK:Arguments out of bounds 
11-20 17:47:03.060: WARN/System.err(303): java.lang.IndexOutOfBoundsException: Arguments out of bounds 
11-20 17:47:03.070: WARN/System.err(303):  at java.io.FileOutputStream.write(FileOutputStream.java:288) 
11-20 17:47:03.080: WARN/System.err(303):  at com.conjure.skiproj.DownloadService$Job.process(DownloadService.java:275) 
11-20 17:47:03.080: WARN/System.err(303):  at com.conjure.skiproj.DownloadService$1.run(DownloadService.java:191) 
11-20 17:47:03.080: WARN/System.err(303):  at java.lang.Thread.run(Thread.java:1096) 

編輯3： 我追查錯誤回FixedLengthInputStream然後進一步回到AbstractHttpInputStream類，其中有這種方法：

/** 
      * Calls abort on the cache entry and disconnects the socket. This 
      * should be invoked when the connection is closed unexpectedly to 
      * invalidate the cache entry and to prevent the HTTP connection from 
      * being reused. HTTP messages are sent in serial so whenever a message 
      * cannot be read to completion, subsequent messages cannot be read 
      * either and the connection must be discarded. 
      * 
      * <p>An earlier implementation skipped the remaining bytes, but this 
      * requires that the entire transfer be completed. If the intention was 
      * to cancel the transfer, closing the connection is the only solution. 
      */ 
      protected final void unexpectedEndOfInput() { 
       if (cacheRequest != null) { 
        cacheRequest.abort(); 
       } 
       httpURLConnection.releaseSocket(false); 
      } 

因此，看起來在Http消息錯誤的情況下，整個下載流被取消。

Answer 1

據我瞭解，在網絡問題的情況下，計數爲0是允許的。嘗試...

while ((count = input.read(data)) != -1) { 
    if (count != 0) { 
     ... 
    } 
} 

Answer 2

即異常由FixedLengthInputStream拋出時所期望的字節數（通常在響應的內容長度報頭中設置）比在響應中的實際數據大。檢查內容長度標題是否正確。 （如果您爲內容長度提供自己的值，請確保它是正確的。）

這將有助於查看設置輸入流的代碼。