Error on web service: "Server returned internal error 500"

[Tito Meinrath]

Hi,

I'm really going mad about this! Currently I'm designing a student
course on web services. Because I want them to understand what's really
going on when web services correspond with each other (or other
consumers) via SOAP, I want to generate SOAP-messages in XML manually
and send it via POST-method to the hosting server.

But whenever I try to use HttpWebRequest-Class to get a response from a
webservice, I get an "Internal Server Error (500)" on response. I've
searched the web for similar problems (and indeed I've found a lot),
but I could not find a working solution.

Here is my source code:

*************** *************** *************** *************** ******
String soap = "<soap12:Envelo pe
xmlns:xsi=\"htt p://www.w3.org/2001/XMLSchema-instance\"
xmlns:xsd=\"htt p://www.w3.org/2001/XMLSchema\"
xmlns:soap12=\" http://www.w3.org/2003/05/soap-envelope\"<soap 12:Body>
<serviceMetod xmlns=\"http://server:8080/WebService.asmx \"<date>some
date</date<headline>s ome headline</headline<news>s ome news</news>
<author>some author</author</serviceMetod</soap12:Body>
</soap12:Envelope >";

WebRequest wReq =
WebRequest.Crea te("http://server:8080/WebService.asmx ");
HttpWebRequest httpReq = (HttpWebRequest )wReq;

httpReq.Method = "POST";
httpReq.Content Length = soap.Length;
httpReq.Content Type = "applicatio n/soap+xml;charse t=utf-8";
httpReq.Headers .add("SOAPActio n http://someuri.net/serviceMethod") ;
Stream sendStream = httpReq.GetRequ estStream();
StreamWriter strmWrtr = new StreamWriter(se ndStream);
strmWrtr.Write( soap);
strmWrtr.Close( );

string sResult;
try
{
//next line will produce the error
WebResponse wResp = httpReq.GetResp onse();
Stream respStrm = wResp.GetRespon seStream();
StreamReader strmRdr = new StreamReader(re spStrm);
sResult = strmRdr.ReadToE nd();
Console.WriteLi ne(sResult);
}
catch (Exception Ex)
{
sResult = "Web Request returned error: " + Ex.Message;
Console.WriteLi ne(sResult);
}
*************** *************** *************** *************** ******

I'm using IIS 6 and VS 2005. Maybe this is an IIS-configuration
problem?

Any help would be really appreciated!

Thanx in advance

Tito

[imonline]

Hi,
Why dont you use microsoft soap toolkit for intercepting the
soap messages and find out the exact error.
I hope this resolves your problem.
thanks,
Nis
Tito Meinrath wrote:

Hi,

I'm really going mad about this! Currently I'm designing a student
course on web services. Because I want them to understand what's really
going on when web services correspond with each other (or other
consumers) via SOAP, I want to generate SOAP-messages in XML manually
and send it via POST-method to the hosting server.

But whenever I try to use HttpWebRequest-Class to get a response from a
webservice, I get an "Internal Server Error (500)" on response. I've
searched the web for similar problems (and indeed I've found a lot),
but I could not find a working solution.

Here is my source code:

*************** *************** *************** *************** ******
String soap = "<soap12:Envelo pe
xmlns:xsi=\"htt p://www.w3.org/2001/XMLSchema-instance\"
xmlns:xsd=\"htt p://www.w3.org/2001/XMLSchema\"
xmlns:soap12=\" http://www.w3.org/2003/05/soap-envelope\"<soap 12:Body>
<serviceMetod xmlns=\"http://server:8080/WebService.asmx \"<date>some
date</date<headline>s ome headline</headline<news>s ome news</news>
<author>some author</author</serviceMetod</soap12:Body>
</soap12:Envelope >";

WebRequest wReq =
WebRequest.Crea te("http://server:8080/WebService.asmx ");
HttpWebRequest httpReq = (HttpWebRequest )wReq;

httpReq.Method = "POST";
httpReq.Content Length = soap.Length;
httpReq.Content Type = "applicatio n/soap+xml;charse t=utf-8";
httpReq.Headers .add("SOAPActio n http://someuri.net/serviceMethod") ;
Stream sendStream = httpReq.GetRequ estStream();
StreamWriter strmWrtr = new StreamWriter(se ndStream);
strmWrtr.Write( soap);
strmWrtr.Close( );

string sResult;
try
{
//next line will produce the error
WebResponse wResp = httpReq.GetResp onse();
Stream respStrm = wResp.GetRespon seStream();
StreamReader strmRdr = new StreamReader(re spStrm);
sResult = strmRdr.ReadToE nd();
Console.WriteLi ne(sResult);
}
catch (Exception Ex)
{
sResult = "Web Request returned error: " + Ex.Message;
Console.WriteLi ne(sResult);
}
*************** *************** *************** *************** ******

I'm using IIS 6 and VS 2005. Maybe this is an IIS-configuration
problem?

Any help would be really appreciated!

Thanx in advance

Tito