apache.commons.fileupload抛出MalformedStreamException [英] apache.commons.fileupload throws MalformedStreamException

问题描述

  public class MyMultipartResolver extends CommonsMultipartResolver {
 public List parseEmptyRequest（HttpServletRequest request）throws IOException，FileUploadException {
 String contentType = request.getHeader（CONTENT_TYPE）; 
 int boundaryIndex = contentType.indexOf（boundary =）; 
 
 InputStream input = request.getInputStream（）; 
 
 byte [] boundary = contentType.substring（boundaryIndex + 9）.getBytes（）; 
 MultipartStream multi = new MultipartStream（input，boundary）; 
 multi.setHeaderEncoding（getHeaderEncoding（））; 
 
 ArrayList items = new ArrayList（）; 
 boolean nextPart = multi.skipPreamble（）; 
 while（nextPart）{
 Map headers = parseHeaders（multi.readHeaders（））; 
 // String fieldName = getFieldName（headers）; 
 
 String subContentType = getHeader（headers，CONTENT_TYPE）; 
 if（subContentType == null）{
 FileItem item = createItem（headers，true）; 
 OutputStream os = item.getOutputStream（）; 
尝试{
 multi.readBodyData（os）; 
} finally {
 os.close（）; 
} 
 items.add（item）; 
} else {
 multi.discardBodyData（）; 
} 
 
 nextPart = multi.readBoundary（）; 
} 
 
退货项目; 
 
 
 
 
 $ b我使用的是commons-fileupload.jar版本1.2。 1，显然代码是使用一些不赞成使用的方法... 
无论如何，当试图使用这段代码来上传一个非常大的文件（780 MB），我得到这个：
 
 
  org.apache.commons.fileupload.MultipartStream $ MalformedStreamException：Stream意外地结束
在org.apache.commons.fileupload.MultipartStream $ ItemInputStream.makeAvailable （InputStream.java:89）
 at org.apache.commons.fileupload.MultipartStream $ ItemInputStream.read（MultipartStream.java:887）
 at java.io.InputStream.read（InputStream.java:89） 
 at org.apache.commons.fileupload.util.Streams.copy（Streams.java:94）
 at org.apache.commons.fileupload.util.Streams.copy（Streams.java:64） 
 at org.apache.commons.fileupload.MultipartStream.readBodyData（MultipartStream.java:593）
 at org.apache.commons.fileupload.MultipartStream.discardBodyData（MultipartStre am.java:619）
  
从'multi.discardBodyData（）;'行抛出。 
  
我的问题：
如何避免这个错误，并且能够成功地收集FileItems？
 （org.apache.commons.fileupload.MultipartStream.MalformedStreamException e）
 {
 
 e.printStackTrace（）; 
 
 return ERROR; 
 
 
 
 $ b $ p 
 $ b 
捕获异常并通过..处理它。 InputStream 或返回错误在struts动作标记中使用它
I have got this piece of code (I didn't write, just maintaining):
public class MyMultipartResolver extends CommonsMultipartResolver{    
  public List parseEmptyRequest(HttpServletRequest request) throws IOException, FileUploadException {
            String contentType = request.getHeader(CONTENT_TYPE);
            int boundaryIndex = contentType.indexOf("boundary=");

            InputStream input = request.getInputStream();

            byte[] boundary = contentType.substring(boundaryIndex + 9).getBytes();
            MultipartStream multi = new MultipartStream(input, boundary);
            multi.setHeaderEncoding(getHeaderEncoding());

            ArrayList items = new ArrayList();
            boolean nextPart = multi.skipPreamble();
            while (nextPart) {
                Map headers = parseHeaders(multi.readHeaders());
               // String fieldName = getFieldName(headers);

                String subContentType = getHeader(headers, CONTENT_TYPE);
                if (subContentType == null) {
                    FileItem item = createItem(headers, true);
                    OutputStream os = item.getOutputStream();
                    try {
                        multi.readBodyData(os);
                    } finally {
                        os.close();
                    }
                    items.add(item);
                } else {
                    multi.discardBodyData();
                }

                nextPart = multi.readBoundary();
            }

            return items;
        }
}
I am using commons-fileupload.jar version 1.2.1 and obviously the code is using some deprecated methods... 

Anyway, while trying to use this code to upload a very large file (780 MB) I get this:
org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
    at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:983)
    at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:887)
    at java.io.InputStream.read(InputStream.java:89)
    at org.apache.commons.fileupload.util.Streams.copy(Streams.java:94)
    at org.apache.commons.fileupload.util.Streams.copy(Streams.java:64)
    at org.apache.commons.fileupload.MultipartStream.readBodyData(MultipartStream.java:593)
    at org.apache.commons.fileupload.MultipartStream.discardBodyData(MultipartStream.java:619)
that is thrown from 'multi.discardBodyData();' line.

My question: 
How can I avoid this error and be able to be able to succeed collecting the FileItems?
解决方案
catch 
(org.apache.commons.fileupload.MultipartStream.MalformedStreamException e)
        {

            e.printStackTrace();

            return ERROR;
        }
Catch the exception and handle it via ..either InputStream or Return Error use it in struts action tag 

                        
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