【发布时间】：2014-05-14 13:00:33
【问题描述】：
我在玩HTML5webkitdirectory递归目录上传：
<form action="http://localhost:8080/upload" method="post" enctype="multipart/form-data">
<input type="file" name="file_input" webkitdirectory="" directory="">
<input type="submit">
</form>
在服务器端，我使用 apache-commons-fileupload 1.3.1 (Streaming API) 处理它：
@WebServlet(urlPatterns = "/upload")
public class DirUploadServlet extends HttpServlet
{
@Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
ServletFileUpload upload = new ServletFileUpload();
response.setContentType(MediaType.TEXT_PLAIN);
PrintWriter writer = response.getWriter();
try
{
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext())
{
FileItemStream item = iter.next();
if (!item.isFormField())
{
writer.println(item.getName());
}
}
}
catch (FileUploadException e)
{
throw new IOException(e);
}
}
}
这适用于没有子目录的目录。 但是，如果我尝试选择包含子目录的目录，请求会正确发送，但是在服务器端我得到以下异常：
org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:1005)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.close(MultipartStream.java:943)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.close(MultipartStream.java:922)
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$FileItemStreamImpl.close(FileUploadBase.java:866)
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:1017)
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.hasNext(FileUploadBase.java:1106)
at DirUploadServlet.doPost(DirUploadServlet.java:45)
这个请求（来自 Ubuntu Chromium）对我来说似乎是合法的：
------WebKitFormBoundaryMQ53uSzX0G6oZpWL
Content-Disposition: form-data; name="file_input"; filename="probadir/dir2/."
Content-Type: application/octet-stream
------WebKitFormBoundaryMQ53uSzX0G6oZpWL
Content-Disposition: form-data; name="file_input"; filename="probadir/file1"
Content-Type: application/octet-stream
------WebKitFormBoundaryMQ53uSzX0G6oZpWL
Content-Disposition: form-data; name="file_input"; filename="probadir/dir2/file2"
Content-Type: application/octet-stream
------WebKitFormBoundaryMQ53uSzX0G6oZpWL--
该错误与 Windows 中的 Google Chrome 相同。 IE 和 Firefox 还没有这个功能。
【问题讨论】：
标签： java html servlets file-upload apache-commons-fileupload