VC获取外网IP函数

最新推荐文章于 2019-07-05 01:47:14 发布

jaymade

最新推荐文章于 2019-07-05 01:47:14 发布

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分类专栏： VC学习文章标签： fp path mfc null 框架 file

本文链接：https://blog.youkuaiyun.com/jaymade/article/details/7818582

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该函数通过http://city.ip138.com/city0.asp获取外网IP，获取成功则返回外网IP，失败则返回"fail",在VC6.0MFC框架

CString GetIPAddress()      
{      
    char buf[MAX_PATH] = {0};   
	int first = 0;
	int last = 0;		
    CString strPath = ".\\netip.ini";        
    URLDownloadToFile(0,"http://city.ip138.com/city0.asp",strPath,0,NULL);      	
    FILE *fp=fopen( strPath, "r" );      
    if( fp != NULL )       
    {      
        fseek(fp, 0, SEEK_SET);      
        fread(buf,1,MAX_PATH,fp);      
        fclose(fp);      		
		CString strAsp(buf);		
		first = strAsp.Find('[');		
		last = strAsp.Find(']');		
		CString sSubStr = strAsp.Mid(first+1,last-first-1);		
		return sSubStr;
	} 
	else 
	{
		fclose(fp);
		fp = NULL;
		return "fail";
	}
}

下测试成功。