我正在玩HTML5 webkitdirectory
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,则会正确发送请求,但是在服务器端,我会收到以下异常:
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)
请求(来自Ubuntu Chromium)似乎对我来说是合法的:
------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--
Windows中的Google Chrome错误相同。 IE和Firefox还没有这个功能。
答案 0 :(得分:0)
这里的问题不在于commons-fileupload,而在于请求或servlet容器本身。当我使用Glassfish 3.1.2和Servlet API以二进制形式注销请求时,我收到以下代码:
------WebKitFormBoundary7AVw8qF0sdCpYB1P
Content-Disposition: form-data; name="files[]"; filename="probadir/dir2/."
Content-Type: application/octet-stream
\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\
\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\
\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\
\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\
等。和0字节,直到结束。这就是为什么commons-fileupload API和Servlet 3中的Multipart API(例如request.getPart()
)都会抛出异常。
现在我认为唯一的解决方案不是使用标准的HTML表单提交,而是单独使用JS解释提交文件:Keep Directory Structure When Uploading