Question

可能重复：
Android:“Unexpected end of stream” exception downloading large files

我正在低估一个大约的档案。 5MB使用HttpURLConnection但在downlod期间的一半我在我的代码行中得到“意外的流结束”错误：

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

这是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)

帮助!! 1

编辑：有关设置输入流的代码的更多信息：

    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：在以下行中有25％的下载时出现新错误IndexOutOfBoundsException：

  output.write(data, 0, count);

下面的日志：

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)

编辑3： 我将错误追溯到FixedLengthInputStream类，然后进一步返回到有这个方法的AbstractHttpInputStream类：

/**
             * 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，似乎在Http消息错误的情况下，整个下载流被取消。

Answer 1

当预期的字节数（通常在响应的内容长度标头中设置）大于响应中的实际数据时，FixedLengthInputStream抛出该异常。检查内容长度标头是否正确。（如果您要为内容长度提供自己的值，请确保它是正确的。）

查看设置输入流的代码会有所帮助。

Answer 2

在网络问题的情况下，据我所知，计数为0是允许的。尝试...

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

下载时出现意外的流错误？

2 个答案: