Re: Post XML to a Java servlet using HttpWebRequest

From: Joerg Jooss (joerg.jooss_at_gmx.net)
Date: 08/26/04 

Date: Thu, 26 Aug 2004 08:01:28 +0200

Kevin Schneider wrote:
> I am trying to POST an XML string to a Java servlet, but I am getting
> the error "The underlying connection was closed: An unexpected error
> occurred on a receive." when I try to get the response. Here's the
> relevant code (some of the names have been changed to protect the
> innocent):
>
> string lcUrl = "http://10.10.10.10:8503/Servlet";
> HttpWebRequest loHttp = (HttpWebRequest) WebRequest.Create(lcUrl);
>
> loHttp.Method="POST";
> byte [] lbPostBuffer =
> System.Text.Encoding.GetEncoding(1252).GetBytes(xmlRequest);
> loHttp.ContentType = "text/xml";
> loHttp.ContentLength = lbPostBuffer.Length;
>
> //Send the POST data
> Stream loPostData = loHttp.GetRequestStream();
> loPostData.Write(lbPostBuffer,0,lbPostBuffer.Length);
> loPostData.Close();
>
> //////////
> //Exception happens here
> HttpWebResponse loWebResponse = (HttpWebResponse)
> loHttp.GetResponse();
> ///////
>
> Encoding enc = System.Text.Encoding.GetEncoding(1252);
>
> StreamReader loResponseStream = new
> StreamReader(loWebResponse.GetResponseStream(),enc);
>
> string lcHtml = loResponseStream.ReadToEnd();
> loWebResponse.Close();
> loResponseStream.Close();
> The XML data looks is
> "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>
> <ContactRequestElementDO>
> <ContactSearchDO>
> <ProductInstID>BBCB7987</ProductInstID>
> </ContactSearchDO>
> </ContactRequestElementDO>"

If that's your typical payload, then using
    System.Text.Encoding.GetEncoding(1252)
is wrong. This gets a Windows-1252 Encoding instance, but your XML obviously
uses UTF-8.

Unfortunately, that isn't likely to fix the problem, since your sample XML
contains only ASCII characters, and the HTTP code looks OK (adding some
using() statements wouldn't hurt, though). Is there an error on the
server-side? Does the servlet process the request?

Cheers, 

-- 
Joerg Jooss
joerg.jooss@gmx.net

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