Created
August 12, 2013 09:35
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Ping function implemented in pure Javascript
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function ping(ip) { | |
var img = new Image(); | |
var start = new Date().getTime(); | |
var flag = false; | |
var isCloseWifi = true; | |
var hasFinish = false; | |
img.onload = function() { | |
if ( !hasFinish ) { | |
flag = true; | |
hasFinish = true; | |
img.src = 'X:\\'; | |
console.log('Ping ' + ip + ' success. '); | |
} | |
}; | |
img.onerror = function() { | |
if ( !hasFinish ) { | |
if ( !isCloseWifi ) { | |
flag = true; | |
img.src = 'X:\\'; | |
console.log('Ping ' + ip + ' success. '); | |
} else { | |
console.log('network is not working!'); | |
} | |
hasFinish = true; | |
} | |
}; | |
setTimeout(function(){ | |
isCloseWifi = false; | |
console.log('network is working, start ping...'); | |
},2); | |
img.src = 'http://' + ip + '/' + start; | |
var timer = setTimeout(function() { | |
if ( !flag ) { | |
hasFinish = true; | |
img.src = 'X://'; | |
flag = false ; | |
console.log('Ping ' + ip + ' fail. '); | |
} | |
}, 1500); | |
} | |
ping('www.google.com:80'); |
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