错误码2-SendRequest调用失败，catch到的

转自 https://blog.csdn.net/heque/article/details/88540462

解决方法：
打开internet explorer（或者internet explorer64）， 选择“文件”下拉菜单（没看到的话，按ALT键可以显示菜单栏），然后取消选中“脱机工作”，返回“联机”工作。之后，使用wininet的相关编程将正常工作；SendRequest的返回将正常。

另外，internet explorer的脱机工作，还会导致vpn工具的登录失败问题，导致vpn的服务端网络等问题

 

这个是

分析：

1.通过firefox或360浏览器访问该https链接能够正常登录，说明网络和服务器等都没有问题；

2.将代码拷贝到另外一台电脑上运行，执行httpsendrequest没有报错，说明应该是系统存在问题；

经过查找分析后，终于解决；

int CHttpClient::ExecuteRequest(LPCTSTR strMethod, LPCTSTR strUrl, LPCTSTR strPostData, string &strResponse)
{
    CString strServer;
    CString strObject;
    DWORD dwServiceType;
    INTERNET_PORT nPort;
    strResponse = "";
 
    AfxParseURL(strUrl, dwServiceType, strServer, strObject, nPort);
 
    if(AFX_INET_SERVICE_HTTP != dwServiceType && AFX_INET_SERVICE_HTTPS != dwServiceType)
    {
        return FAILURE;
    }
	
	//DWORD dwOpenRequestFlags = INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTP |
 //       INTERNET_FLAG_KEEP_CONNECTION |
 //       INTERNET_FLAG_NO_AUTH |
 //       INTERNET_FLAG_NO_COOKIES |
 //       INTERNET_FLAG_NO_UI |
 //       //设置启用HTTPS
 //       INTERNET_FLAG_SECURE |
 //       INTERNET_FLAG_RELOAD;
	
	//m_pSession->SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, 1000 * 30);
	//m_pSession->SetOption(INTERNET_OPTION_CONNECT_BACKOFF,1000);
	//m_pSession->SetOption(INTERNET_OPTION_CONNECT_RETRIES,1);
    try
    {
        m_pConnection = m_pSession->GetHttpConnection(strServer,
            dwServiceType == AFX_INET_SERVICE_HTTP ? NORMAL_CONNECT : SECURE_CONNECT,
            nPort);
		 
		m_pFile = m_pConnection->OpenRequest(strMethod, strObject, 
            NULL, 1, NULL, NULL, 
            (dwServiceType == AFX_INET_SERVICE_HTTP ? NORMAL_REQUEST : SECURE_REQUEST));
		  
		  //m_pFile = m_pConnection->OpenRequest(strMethod, strObject, 
    //        NULL, 1, NULL, NULL, 
    //        dwOpenRequestFlags);
 
#if 0
        DWORD dwFlags;
		m_pFile->QueryOption(INTERNET_OPTION_SECURITY_FLAGS, dwFlags);
        dwFlags |= SECURITY_FLAG_IGNORE_UNKNOWN_CA;
        set web server option
        m_pFile->SetOption(INTERNET_OPTION_SECURITY_FLAGS, dwFlags);
#endif
 
		m_pFile->AddRequestHeaders("Host: sms.huhutv.com.cn");
        m_pFile->AddRequestHeaders("Accept: text/html, */*; q=0.01");
		m_pFile->AddRequestHeaders("User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36");
		m_pFile->AddRequestHeaders("Referer: https://sms.huhutv.com.cn/rtcrm-clientweb/npage/obim/staff/loginmng/initLogin.do");
        m_pFile->AddRequestHeaders("Accept-Language: zh-CN,zh;q=0.8");
        m_pFile->AddRequestHeaders("Content-Type: application/x-www-form-urlencoded;charset=UTF-8");
        m_pFile->AddRequestHeaders("Accept-Encoding: gzip, deflate, sdch");
		if(strCookie != ""){
			CString str;
			str.Format("Cookie:%s",strCookie);
			m_pFile->AddRequestHeaders(str);
		}else
		{
			m_pFile->AddRequestHeaders("Cookie: JSESSIONID=6F5AA3FA40C60178D776152742886227; insert_cookie=49078854");
		}
		m_pFile->AddRequestHeaders("Connection: keep-alive");
		//MessageBox(NULL,strCookie.GetString(), "strCookie", MB_OK|MB_ICONINFORMATION);
		//ShowFileHeaders();
        m_pFile->SendRequest(NULL, 0, (LPVOID)(LPCTSTR)strPostData, strPostData == NULL ? 0 : _tcslen(strPostData));
 
        char szChars[BUFFER_SIZE + 1] = {0};
        string strRawResponse = "";
        UINT nReaded = 0;
		GetURLCookie();
		
		DWORD dwStatus = 0;
		DWORD dwStatusLen = sizeof(dwStatus);  
		m_pFile->QueryInfo(HTTP_QUERY_FLAG_NUMBER | HTTP_QUERY_STATUS_CODE,  
                    &dwStatus, &dwStatusLen, 0);
 
		while ((nReaded = m_pFile->Read((void*)szChars, BUFFER_SIZE)) > 0)
		{
			szChars[nReaded] = '\0';
			strRawResponse += szChars;
			memset(szChars, 0, BUFFER_SIZE + 1);
		}
		
        int unicodeLen = MultiByteToWideChar(CP_UTF8, 0, strRawResponse.c_str(), -1, NULL, 0);
        WCHAR *pUnicode = new WCHAR[unicodeLen + 1];
        memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));
 
        MultiByteToWideChar(CP_UTF8,0,strRawResponse.c_str(),-1, pUnicode,unicodeLen);
        CString cs(pUnicode);
        delete []pUnicode; 
        pUnicode = NULL;
 
        strResponse = cs;
 
        //Clear();
    }
    catch (CInternetException* e)
    {
        //Clear();
        DWORD dwErrorCode = e->m_dwError;
        e->Delete();
 
        DWORD dwError = GetLastError();
		CString strErr;
		strErr.Format("dwErrorCode = %d", dwErrorCode);
		//LOG::out0("dwError = %d", dwError, 0);
		MessageBox(NULL,strErr.GetString(), "提示", MB_OK|MB_ICONINFORMATION);
        if (ERROR_INTERNET_TIMEOUT == dwErrorCode)
        {
            return OUTTIME;
        }
        else
        {
            return FAILURE;
        }
    }
    return SUCCESS;
}