第二次我在HttpPost中使用“ getResponse（）”时，它只能逐步调试

Question

I'm using C# on VS2010, FrameWork 4.0. I wrote a Console Application that makes two Http-Post calls in sequence. The second call uses in input what is returned by the first. Well, when I run the Application in debug mode, step-by-step (F10) using breakpoints, all works fine. But if I remove the breakpoints and press "F5", I get an exception when my code executes "webRequest.getResponse()" in the SECOND Http-Post call, probably because of a timeout, because the error takes about 60 seconds to appear.

The exception is: ErrorCode 10054 - Connection was forcibly closed by the remote host.

This is the class used by my Application (the console application calls the method "Search"):

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Net;
using System.IO;

namespace MyNamespace
{
    public class MyClass
    {
        private string SearchId { get; set; }
        private string XmlOutputSearch { get; set; }

        public MyClass()
        {
            SearchId = "";
            XmlOutputSearch = "";
        }

        public string Search()
        {
            StartSearch();
            CheckResults();
            return XmlOutputSearch;
        }

        public void StartSearch()
        {
            string sInput = "[myStartSearchXmlRequest]";
            string sOutput = HttpPost(sInput);

            XmlDocument myXmlDoc = new XmlDocument();
            myXmlDoc.LoadXml(sOutput);
            SearchId = myXmlDoc.SelectSingleNode("//SearchId").InnerXml;
        }

        public void CheckResults()
        {
            string sInput = "[myCheckResultsXmlRequest using SearchId]";
            XmlOutputSearch = HttpPost(sInput);
        }

        private string HttpPost(string parameters)
        {
            try
            {
                HttpWebRequest webRequest = (HttpWebRequest)HttpWebRequest.Create("[myURI]");

                webRequest.ContentType = "text/xml";
                webRequest.Method = "POST";

                byte[] bytes = Encoding.ASCII.GetBytes(parameters);
                Stream os = null;
                try
                { // send the Post
                    webRequest.ContentLength = bytes.Length;   //Count bytes to send
                    os = webRequest.GetRequestStream();
                    os.Write(bytes, 0, bytes.Length);         //Send it
                }

                catch (WebException ex)
                {
                    throw ex;
                }
                finally
                {
                    if (os != null)
                    {
                        os.Close();
                    }
                }

                try
                { // get the response

                    // Here I get the exception, on webRequest.GetResponse(), when HttpPost is called 
                    // by CheckResults, if not in Step-By-Step mode
                    using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse()) 
                    {
                        if (webResponse == null)
                        { return null; }
                        StreamReader sr = new StreamReader(webResponse.GetResponseStream());
                        string sReturn = sr.ReadToEnd().Trim();
                        sr.Close();
                        webResponse.Close();
                        webRequest.Abort();

                        return sReturn;
                    }
                }
                catch (WebException wex)
                {
                    // This exception will be raised if the server didn't return 200 - OK  
                    // Try to retrieve more information about the network error  
                    if (wex.Response != null)
                    {
                        using (HttpWebResponse errorResponse = (HttpWebResponse)wex.Response)
                        {
                            Console.WriteLine(
                                "The server returned '{0}' with the status code {1} ({2:d}).",
                                errorResponse.StatusDescription, errorResponse.StatusCode,
                                errorResponse.StatusCode);
                        }
                    }
                }
            }
            catch (Exception excep)
            {
                Console.WriteLine("Exception in WebResponse. " + excep.Message + " - " + excep.StackTrace);
            }
            return null;
        } // end HttpPost 
    }
}

Answer 1

Have you tried to see if there are any errors in the eventlog? Try enabling Tracing on your service to know the exact reason. The above error occurs has the following description :

Connection reset by peer. An existing connection was forcibly closed by the remote host. This normally results if the peer application on the remote host is suddenly stopped, the host is rebooted, the host or remote network interface is disabled, or the remote host uses a hard close (see setsockopt for more information on the SO_LINGER option on the remote socket). This error may also result if a connection was broken due to keep-alive activity detecting a failure while one or more operations are in progress. Operations that were in progress fail with WSAENETRESET. Subsequent operations fail with WSAECONNRESET.

Reference : http://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx