C Cinternetsession连接丢失

我使用 CInternetSession获取和发布请求。但是，当connexion发生时间时，我丢失了connexion，并且总是会遇到无效的服务器请求错误，我不明白为什么。此外，还有一个内存泄漏。

#include "stdafx.h"
#include "httpConnexion.h"
#include "TSException.h"
ChttpConnexion::ChttpConnexion()
    : CInternetSession(AfxGetAppName(), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, NULL, INTERNET_FLAG_DONT_CACHE)
    , m_lastRequest()
{       
    SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, 10000);
    SetOption(INTERNET_OPTION_RECEIVE_TIMEOUT, 10000);
    m_bAttente = true;
}
ChttpConnexion::~ChttpConnexion()
{
}
std::string ChttpConnexion::sendRequest(const std::string& strUrl)
{   
    DWORD dwServiceType;
    CString strServerName;
    CString strObject;
    INTERNET_PORT nPort;
    AfxParseURL(strUrl.c_str(), dwServiceType, strServerName, strObject, nPort);
    CString strHeaders = _T("User-Agent: User-Agent=Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36rnAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8rnAccept-Language: fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7rnConnection: keep-alivernContent-Type: application/x-www-form-urlencoded");
    CString strTmp = "", strResult = "";
    CHttpConnection* pHttpConnexion = NULL;
    CHttpFile* pHttpFile = NULL;
    try
    {   
        //Creation de la connexion Http
        pHttpConnexion = GetHttpConnection(strServerName, INTERNET_FLAG_RELOAD | INTERNET_FLAG_DONT_CACHE, nPort, NULL, NULL);
        //Creation de la requete GET
        pHttpFile = pHttpConnexion->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject, NULL, 1, NULL, NULL, INTERNET_FLAG_RELOAD | INTERNET_FLAG_DONT_CACHE);
        //Envoi de la requéte
        BOOL bRequestSend = pHttpFile->SendRequest(strHeaders);
        CString headers;headers.Empty();
        DWORD dwRet;
        pHttpFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF,headers);
        pHttpFile->QueryInfoStatusCode(dwRet);
        //Lecture du résultat
        while ( pHttpFile->ReadString(strTmp))
        {
            strResult += strTmp;
        }
        //Fermeture de la requéte
        pHttpFile->Close();
        //Fermeture de la connexion
        pHttpConnexion->Close();
        //Suppression des objets
        if (pHttpFile != NULL)  
            delete pHttpFile;
        if (pHttpConnexion != NULL) 
            delete pHttpConnexion;
    }
    catch(CInternetException* exp)
    {
        exp->Delete();
        //Fermeture de la requéte
        if (pHttpFile != NULL)
        {
            pHttpFile->Close();
            delete pHttpFile;
        }
        //Fermeture de la connexion
        if (pHttpConnexion != NULL) 
        {
            pHttpConnexion->Close();
            delete pHttpConnexion;
        }
        throw CTSException("sendRequest");
    }       
    return strResult.GetString();
}

std::string ChttpConnexion::postRequest(const std::string& strUrl, const std::string& postData)
{    
    DWORD dwServiceType;
    CString strServerName;
    CString strObject;
    INTERNET_PORT nPort;
    AfxParseURL(strUrl.c_str(), dwServiceType, strServerName, strObject, nPort);
    CString strHeaders = _T("User-Agent: User-Agent=Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36rnAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8rnAccept-Language: fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7rnConnection: keep-alivernContent-Type: application/x-www-form-urlencoded");
    CString strTmp = "", strResult = "";
    CHttpConnection* pHttpConnexion = NULL;
    CHttpFile* pHttpFile = NULL;
    try
    {   
        //Creation de la connexion Http
        pHttpConnexion = GetHttpConnection(strServerName, INTERNET_FLAG_RELOAD | INTERNET_FLAG_DONT_CACHE, nPort, NULL, NULL);
        //Creation de la requete GET
        pHttpFile = pHttpConnexion->OpenRequest(CHttpConnection::HTTP_VERB_POST, strObject, NULL, 1, NULL, NULL, INTERNET_FLAG_RELOAD | INTERNET_FLAG_DONT_CACHE);
        //Envoi de la requéte
        BOOL bRequestSend = pHttpFile->SendRequest(strHeaders, (LPVOID) (LPCTSTR) postData.c_str(), postData.length());
        CString headers;headers.Empty();
        DWORD dwRet;
        pHttpFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF,headers);
        pHttpFile->QueryInfoStatusCode(dwRet);
        CString data;
        GetCookie(strServerName, "sess_id", data);
        //Lecture du résultat
        while ( pHttpFile->ReadString(strTmp))
        {
            strResult += strTmp;
        }

        //Fermeture de la requéte
        pHttpFile->Close();
        //Fermeture de la connexion
        pHttpConnexion->Close();
        //Suppression des objets
        if (pHttpFile != NULL)  
            delete pHttpFile;
        if (pHttpConnexion != NULL) 
            delete pHttpConnexion;
    }
    catch(CInternetException* exp)
    {
        exp->Delete();
        //Fermeture de la requéte
        if (pHttpFile != NULL)
        {
            pHttpFile->Close();
            delete pHttpFile;
        }
        //Fermeture de la connexion
        if (pHttpConnexion != NULL) 
        {
            pHttpConnexion->Close();
            delete pHttpConnexion;
        }
        throw CTSException("postRequest");
    }   
    return strResult.GetString();
}

感谢您的帮助！