function extractHostName(url)
{
var idxDSlash = url.indexOf("//")
if(idxDSlash > 0)
url = url.slice(idxDSlash+2,url.length)
var idxSSlash = url.indexOf("/")
if(idxSSlash > 0)
url = url.slice(0,idxSSlash)
return url;
}
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