500 internal server error at GetResponse

Question

I have a heavy traffic aspx page calling a web service upon every user s request as follows   string uri    Path asmx   string soap    soap xml string    HttpWebRequest request    HttpWebRequest WebRequest Create uri   request Headers Add  SOAPAction      http   xxxxxx     request ContentType    text xml charset   utf-8     request Accept    text xml   request Method    POST    using  Stream stm   request GetRequestStream          using  StreamWriter stmw   new StreamWriter stm                 stmw Write soap           WebResponse response   request GetResponse    response close      Everything is working fine but sometimes I am getting the following error   The remote server returned an error   500  Internal Server Error     at System Net HttpWebRequest GetResponse    Does anybody have any idea about this error or can anybody tell me if I am doing wrong

User · Answer

Have you tried to specify UserAgent for your request  For example   request UserAgent    Mozilla 4 0  compatible  MSIE 5 01  Windows NT 5 0

User · Answer

For me this error occurred because I had 2 web API actions that had the exact same signatures and both had the same verbs  HttpPost  what I did was change one of the verbs  the one used for updating  to PUT and the error was removed  The following in my catch statement helped in getting to the root of the problem   catch  WebException webex                    WebResponse errResp   webex Response                  using  Stream respStream   errResp GetResponseStream                                          StreamReader reader   new StreamReader respStream                       string text   reader ReadToEnd

User · Answer

From that error  I would say that your code is fine  at least the part that calls the webservice  The error seems to be in the actual web service   To get the error from the web server  add a try catch and catch a WebException  A WebException has a property called Response which is a HttpResponse  you can then log anything that is returned  and upload you code  Check back later in the logs and see what is actually being returned

User · Answer

Finally I get rid of internal server error message with the following code  Not sure if there is another way to achieve it    string uri    Path asmx   string soap    soap xml string    HttpWebRequest request    HttpWebRequest WebRequest Create uri   request Headers Add  SOAPAction      http   xxxxxx     request ContentType    text xml charset   utf-8     request Accept    text xml   request Method    POST    using  Stream stm   request GetRequestStream          using  StreamWriter stmw   new StreamWriter stm                 stmw Write soap            using  WebResponse webResponse   request GetResponse

User · Answer

In my case I just remove the SoapAction instruction from the HttpWebRequest object  So  I don t define  Headers Add  SOAPAction   someurl   in HttpWebRequest definitions and my code works fine   ResultXML is an XDocument  ResultString is a string   try       HttpWebRequest req    HttpWebRequest WebRequest Create Url         req Headers Add  SOAPAction    http   tempuri org IWebService GetMessage        req ProtocolVersion   HttpVersion Version11      req ContentType    text xml charset   utf-8         req Accept    text xml       req KeepAlive   true      req Method    POST                using  Stream stm   req GetRequestStream                  using  StreamWriter stmw   new StreamWriter stm               stmw Write soapStr             using  StreamReader responseReader   new StreamReader req GetResponse   GetResponseStream                   string result   responseReader ReadToEnd            ResultXML   XDocument Parse result           ResultString   result

User · Answer

looking at your error message first of all I would suggest you to recompile your whole application  make sure all the required dlls are there in bin folder when you recompile it

User · Answer

In my case my request object inherited from base object  Without knowingly I added a property with int  in my request object and my base object also has same property   same name   with int datatype  I noticed this and deleted the property which I added in request object and after that it worked fine

User · Answer

For me the error was misleading  I discovered the true error by testing the errant web service with SoapUI

[c#] 500 internal server error at GetResponse()

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