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Can't get my multipart/form-data processed. Error: "Stream ended
unexpectedly"

The post body is sent over XMLHttpRequest. (the submission works fine
if sent via "normal" form submission). There seems to be a problem
with the request. Bad headers, or content-length incorrect? I can't
spot the error.

Stacktrace:

org.apache.jasper.servlet.JspServletWrapper.handle JspException(JspServletWrapper.java:
515)

org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:
40
org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:
320)
org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet .java:803)
com.jspinsider.jspkit.gzip.GZIPFilter.doFilter(Unk nown Source)
</pre></p><p><b>root cause</b> <pre>javax.servlet.ServletException:
org.apache.commons.fileupload.FileUploadException

: Processing of multipart/form-data request failed.
Stream ended unexpectedly
^^^^^^^^^^^^^^^^^^^^^^^^^^^

page /ape/release/example/form/process.jsp at line 10
7: // Create a new file upload handler
8: ServletFileUpload upload = new ServletFileUpload(factory);
9:
10: List&lt;FileItem&gt; items = upload.parseRequest(request);
11: response.setContentType(&quot;text/plain&quot;
12: out.write(items.toString());
13:

Is an incorrect content-length causing this?

Here is the first request, via XMLHttpRequest form submission:
----------------------------------------------------------
http://localhost/ape/release/example/form/process.jsp



POST /ape/release/example/form/process.jsp HTTP/1.1

Host: localhost

User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:
1.9) Gecko/2008061004 Firefox/3.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8

Accept-Language: en-us,en;q=0.5

Accept-Encoding: gzip,deflate

Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7

Keep-Alive: 300

Connection: keep-alive

Content-Type: multipart/form-data; charset=UTF-8;
boundary=DATA1215979532633

Referer: http://localhost/ape/release/example/form/Form.html

Content-Length: 91

Cookie: JSESSIONID=242B477B4C9455A201CF1BF7D5CFCE16

Pragma: no-cache

Cache-Control: no-cache


--DATA1215979532633
Content-Disposition: form-data; name="name";

a
--DATA1215979532633--


HTTP/1.x 500 Internal Server Error

Server: Apache-Coyote/1.1

Content-Type: text/html;charset=utf-8

Content-Length: 3840

Date: Sun, 13 Jul 2008 20:05:32 GMT

Connection: close

----------------------------------------------------------



Here is the second request, via "normal" form submission:
----------------------------------------------------------

http://localhost/ape/release/example/form/process.jsp



POST /ape/release/example/form/process.jsp HTTP/1.1

Host: localhost

User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:
1.9) Gecko/2008061004 Firefox/3.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/
*;q=0.8

Accept-Language: en-us,en;q=0.5

Accept-Encoding: gzip,deflate

Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7

Keep-Alive: 300

Connection: keep-alive

Referer: http://localhost/ape/release/example/form/Form.html

Cookie: JSESSIONID=242B477B4C9455A201CF1BF7D5CFCE16

Content-Type: multipart/form-data;
boundary=---------------------------1055457295855832845137158309

Content-Length: 170

-----------------------------1055457295855832845137158309

Content-Disposition: form-data; name="name"



a

-----------------------------1055457295855832845137158309--



HTTP/1.x 200 OK

Server: Apache-Coyote/1.1

Content-Encoding: gzip

Content-Type: text/plain

Transfer-Encoding: chunked

Date: Sun, 13 Jul 2008 20:10:15 GMT

----------------------------------------------------------


The java code:
// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);

List<FileItem> items = upload.parseRequest(request);
response.setContentType("text/plain");
out.write(items.toString());