流误差对下载意外结束？ [英] unexpected end of stream error on download?
问题描述
可能重复：
<一href="http://stackoverflow.com/questions/7402500/androidunexpected-end-of-stream-exception-downloading-large-files">Android:“Unexpected流＆rdquo结束;除了下载大文件
我downloding约的文件。 5MB的downlod我得到时使用的HttpURLConnection，但半路上一个流意外结束错误在这行我的code：
I'm downloding a file of approx. 5MB using HttpURLConnection but half way during the downlod i get an "unexpected end of stream" error at this line of my code:
while ((count = input.read(data)) > 0) {
下面是日志：
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$1.run(DownloadService.java:193)
11-20 16:05:55.759: WARN/System.err(3425): at java.lang.Thread.run(Thread.java:1019)
帮助!! 1
Help !!1
编辑：在code更多信息设置InputStream的：
more info on the code setting up the inputstream:
HttpURLConnection conexion = (HttpURLConnection)url.openConnection();
conexion.setRequestMethod("GET");
conexion.setReadTimeout(20000);
conexion.connect();
File file = new File(root.getAbsolutePath()+"/", fileName);
int lenghtOfFile = conexion.getContentLength();
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(file);
byte data[] = new byte[8192];
...........................
编辑2：有一个新的错误IndexOutOfBoundsException异常的下载下一行25％：
EDIT 2: Got a new error IndexOutOfBoundsException on 25% of download on the following line:
output.write(data, 0, count);
以下日志：
11-20 17:47:02.311: ERROR/totaltotal(303): 24
11-20 17:47:02.311: INFO/System.out(303): countcountcount:4332
11-20 17:47:02.330: ERROR/totaltotal(303): 24
11-20 17:47:02.330: INFO/System.out(303): countcountcount:2904
11-20 17:47:02.330: ERROR/totaltotal(303): 25
11-20 17:47:02.330: INFO/System.out(303): countcountcount:1452
11-20 17:47:02.330: ERROR/totaltotal(303): 25
11-20 17:47:02.650: INFO/System.out(303): countcountcount:4356
11-20 17:47:02.650: ERROR/totaltotal(303): 25
11-20 17:47:02.650: INFO/System.out(303): countcountcount:-1
11-20 17:47:02.660: ERROR/totaltotal(303): 25
11-20 17:47:02.892: DEBUG/dalvikvm(303): GC_FOR_MALLOC freed 10770 objects / 490896 bytes in 143ms
11-20 17:47:03.060: ERROR/PRINTSTACK(303): STACK:Arguments out of bounds
11-20 17:47:03.060: WARN/System.err(303): java.lang.IndexOutOfBoundsException: Arguments out of bounds
11-20 17:47:03.070: WARN/System.err(303): at java.io.FileOutputStream.write(FileOutputStream.java:288)
11-20 17:47:03.080: WARN/System.err(303): at com.conjure.skiproj.DownloadService$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)
修改3： 我在哪里有这种方法跟踪误差回FixedLengthInputStream类，然后再回到AbstractHttpInputStream类：
EDIT 3: I traced the error back to FixedLengthInputStream class and then further back to AbstractHttpInputStream class in where there is this method:
/**
* 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);
}
如此看来，在HTTP消息错误的情况下，整个下载流将被取消。
So it seems that in the case of an Http message error the whole download stream is canceled.
推荐答案
这异常是由FixedLengthInputStream时抛出字节（通常响应的内容长度标头中设置）的预期数量是比实际数据大响应。检查内容长度的头是正确的。 （如果你提供你自己的价值，为内容长度，确保它是正确的。）
That exception is thrown by FixedLengthInputStream when the expected number of bytes (usually set in the content-length header of the response) is larger than the actual data in the response. Check that the content-length header is correct. (If you're supplying your own value for the content length, make sure it is correct.)
这将有助于看到你的code，设置了输入流。
It would help to see your code that sets up the input stream.
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