Question

使用Embarcadero C ++ Builder 2010，我正在尝试检测连接到网络的特定Web服务器设备。

我正在通过使用TIdHTTP调用CGI函数并在一系列IP地址上分析答案来询问这些设备。

我正在使用IdHTTP-＆gt; ConnectTimeout和IdHTTP-＆gt; ReadTimeout参数，如果在超时时间之前没有连接，则抛出异常。这应该在TIdHTTP询问意外设备时发生，在这种情况下，我通过调用IdHTTP-＆gt; Free（）来释放IdHTTP。

在Windows 7上运行正常，但在Windows XP上超时不适用，因此在IdHTTP.get（）停止前最多可能需要10分钟。

通过删除这两个参数，应用程序在Windows XP上的工作速度提高了一些，但仍然需要与超时相比我预期的时间长。

我发现这个相关的主题没有真正的解决方案：Indy 10 + SSL = works in Windows 7, does not work on XP

这是源代码的一部分：

        #include "winsock2.h"

        String url = "http://" + anIpAddress + "/myCGIFunction.cgi";
        TMemoryStream *XML = new TMemoryStream;
        AnsiString answer="";

        p_IdHTTP = new TIdHTTP(NULL);
        try
        {
                p_IdHTTP->ConnectTimeout = 2000;

                p_IdHTTP->Get(url,XML);

                XML->Position = 0;
            answer=ReadStringFromStream(XML);

                p_IdHTTP->Free();
         }
         catch (...)
         {
            p_IdHTTP->Free();
         }

我的问题是：为什么IdHTTP-＆gt; ConnectTimeout无法在Windows XP上运行？您是否有任何想法替换此参数以在特定时间后释放/销毁IdHTTP？

更新

    void __fastcall Func::MyFunc()
    {
                AnsiString anIpAddress= "20.20.20.11";
                String url = "http://" + anIpAddress + "/myCGIFunction.cgi";
                TMemoryStream *XML = new TMemoryStream;
                AnsiString answer="";

                p_IdHTTP = new TIdHTTP(NULL);
                try
                {
                        p_SSLHandler=new TIdSSLIOHandlerSocketOpenSSL(p_IdHTTP);
                p_SSLHandler->SSLOptions->Method= sslvSSLv23;

                p_IdHTTP->ConnectTimeout = 2000;
                p_IdHTTP->ReadTimeout=400;
                p_IdHTTP->IOHandler=p_SSLHandler;

                p_IdHTTP->OnConnected= IdHTTPConnected;
                p_IdHTTP->OnStatus= IdHTTPStatus;

                p_IdHTTP->Get(url,XML);
                        XML->Position = 0;
                    answer=ReadStringFromStream(XML);

                        p_IdHTTP->Free();
                 }
                 catch (...)
                 {
                    p_IdHTTP->Free();
                 }
   } 


void __fastcall Func::IdHTTPStatus(TObject *Sender, TIdStatus const AStatus, String const AStatusText){

    String msgtest = ipAddress ;

    switch (AStatus){
        case  (hsResolving):
            msgtest+= " resolving...";

            break;
        case  (hsConnecting):
            msgtest+= "  connecting...";
            break;
        case  (hsConnected):
            msgtest+= "  connected...";
            break;
        case  (hsDisconnecting):
            msgtest+= "  disconnecting...";
            break;
        case  (hsDisconnected):
            msgtest+= "  disconnected...";
            break;
        case  (hsStatusText):
            msgtest+= "  hsStatusText: " + AStatusText;
            break;
        default:
            msgtest+= " Other status ";
            break;
    }
    aListBox->Items->Add(msgtest);
    Application->ProcessMessages();
}

void __fastcall Func::IdHTTPConnected(TObject *Sender){
struct timeval timeout;
timeout.tv_sec = 2;
timeout.tv_usec = 0;

setsockopt((unsigned int) p_IdHTTP->Socket->Binding, SOL_SOCKET,    
                           SO_RCVTIMEO, (char *)&timeout, sizeof(timeout) );

    setsockopt ((unsigned int) p_IdHTTP->Socket->Binding, SOL_SOCKET, SO_SNDTIMEO,
                 (char *)&timeout, sizeof(timeout));

}

IdHTTP-＆gt; ConnectTimeout适用于Windows 7，不适用于XP

0 个答案: