本文以C与MFC的两个实例详述了取外网IP的两种实现方法,具体实现代码如下:
MFC语言实现获取外网IP:
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# include <windows.h> # include <urlmon.h> # pragma comment(lib,"URLMON.lib") void main() { URLDownloadToFile(NULL, "http://www.ip138.com/ip2city.asp" , "ip.txt" ,0,NULL); system ( "notepad ip.txt" ); } #include<urlmon.h> #pragma comment (lib,"Urlmon.lib") char buf[MAX_PATH] = {0}; char chTempIp[128]; char chIP[64]; URLDownloadToFile(0, "http://www.ip138.com/ip2city.asp" , "c:\\1.ini" ,0,NULL); FILE *fp= fopen ( "c:\\1.ini" , "r" ); if ( fp != NULL ) { fseek (fp, 0, SEEK_SET); fread (buf,1,256,fp); fclose (fp); char * iIndex = strstr (buf, "[" ); if (iIndex) { sprintf ( chTempIp, "%s" ,iIndex); int nBuflen = strlen (chTempIp); for ( int i =0; i<nBuflen; i++) { chIP[i] = chTempIp[i+1]; if (chTempIp[i] == ']' ) { chIP[i-1] = '\0' ; DeleteFile( "c:\\1.ini" ); continue ; } } } } MessageBox(chIP); |
C实现获取外网IP:
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#include <afxinet.h> void CLanChatDlg::GetNetIP() { SetDlgItemText(IDC_NET_IP, "正在获取外网IP" ); CString strsource; CString Address; CInternetSession mySession(NULL,0); CHttpFile* myHttpFile=NULL; Address= "http://www.ip138.com/ip2city.asp" ;//ip138网页 myHttpFile=(CHttpFile*)mySession.OpenURL(Address); //读取网络地址 while (myHttpFile->ReadString(strsource)) { //循环读取下载来的网页文本 // AddToLog(strsource); int begin=0; begin=strsource.Find( "[" ,0); if (begin!=-1) //如果找到"[", 则找"]" 中括号内的文本则是 你的外网ip { int end=strsource.Find( "]" ); m_internetip=strsource.Mid(begin+1,end-begin-1); //提取外网ip SetDlgItemText(IDC_NET_IP,m_internetip); //在左下角显示外网ip } } |
这两个示例都是通过ip138网站来查询外网IP的,感兴趣的读者也可以根据自己的喜好改动一下代码,使之更加完善。