XML in servlet response

[mkwg]

Hi,
I wonder if anyone can help with this question.
I have a test servlet that simply echoes back XML text that is sent to it, with UTF-8 encoding. Here's the servlet code:

public void doPost(HttpServ letRequest request,
HttpServletResp onse response)
throws ServletExceptio n, IOException {
response.setCon tentType("text/xml");
response.setCha racterEncoding( "UTF-8");
ServletInputStr eam sis = request.getInpu tStream();
ServletOutputSt ream sos = response.getOut putStream();
//File file = new File("C:/echo.xml");
//FileOutputStrea m fos = new FileOutputStrea m(file);
byte[] buf = new byte[1024];
int i = 0;
while((i=sis.re ad(buf))!=-1) {
sos.write(buf, 0, i);
//fos.write(buf, 0, i);
}
sis.close();
sos.close();
//fos.close();
}

The XML text that arrives in the request has the header:
<?xml version="1.0" encoding="UTF-8"?>

The file output (commented out in the code above) shows the header:
<?xml version="1.0" encoding="UTF-8"?>

But the XML text that appears in the response has the header:
<?xml version="1.0"?>
The response header contains, as expected:
Content-Type: text/xml;charset=UTF-8


I'm assuming that this is some behavior of the ServletResponse interface.
If so:
- is this documented?
- is there any way to control/prevent it, so that the XML text in the response shows the same header?

Many thanks for any help/advice with this.
MKWG

[cdbruun]

That sounds weird. As far as I know the servlet response data section contains exactly the bytes you write to it.

Are you using a browser to access the servlet ?

Are you 100% sure that the browser is not pretty printing the XML
and the removing the enconding attribute (it is redundant since UTF-8 is the standard encoding).

Try using netcat, curl or wget to access the servlet. This way you can be sure that nothing alters the data

/Christoffer