//util 网络实用工具
import inet.http; 
import process.popen;
namespace inet.util;

getWebServer = function(url){
 	var whttp = ..inet.http();
 	if( !..string.startsWith(url,"http://",true) )
 		url = "http://" + url;
 		
	if(! whttp.beginRequest( url ) ) return;
	if(! whttp.send() ) return;
	
	var server = whttp.readHeader("Server")  
	var poweredBy = whttp.readHeader("X-Powered-By")  
	var aspnet_ver = whttp.readHeader("X-AspNet-Version")  
	if(aspnet_ver)
		poweredBy ++= "/" + aspnet_ver 
		
	whttp.close();	
	return server, poweredBy
}

getSystem = function(host){
	var subprocess = ..process.popen("ping " + host + " -n 1") 
	var str = subprocess.read(-1);
	subprocess.close(); 

	ttl = ..string.match(str,"TTL\=(\d+)" )
	ttl = tonumber(ttl) 
 	if(!ttl)
 		return "";

	if( ttl>110 && ttl<128 )
		return "Windows"
	elseif( ttl>=32 && ttl<64 ) {
		return "Linux"
	}  
	elseif( ttl <= 32 ) {
		return "Win9x"
	} 
	elseif( ttl == 64 ) {
		return "Compaq"
	}
	elseif( ttl > 128 ){
		return "UNIX" 
	} 
	return ""
}

/**intellisense(inet.util)
getSystem(__/*主机*/) = 检测目标主机操作系统
getWebServer(__/*URL*/) = 检测Web服务器版本
end intellisense**/