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Simple Long Polling Example with JavaScript and jQuery by Tian Davis (@tiandavis) from Techoctave.com (http://techoctave.com/c7/posts/60-simple-long-polling-example-with-javascript-and-jquery)
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// Long Polling (Recommened Technique - Creates An Open Connection To Server ∴ Fast) | |
(function poll(){ | |
$.ajax({ url: "server", success: function(data){ | |
//Update your dashboard gauge | |
salesGauge.setValue(data.value); | |
}, dataType: "json", complete: poll, timeout: 30000 }); | |
})(); |
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// The setTimeout Technique (Not Recommended - No Queues But New AJAX Request Each Time ∴ Slow) | |
(function poll(){ | |
setTimeout(function(){ | |
$.ajax({ url: "server", success: function(data){ | |
//Update your dashboard gauge | |
salesGauge.setValue(data.value); | |
//Setup the next poll recursively | |
poll(); | |
}, dataType: "json"}); | |
}, 30000); | |
})(); |
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// The setInterval Technique (Not Recommended - Creates Queues of Requests ∴ Can Be Slow) | |
setInterval(function(){ | |
$.ajax({ url: "server", success: function(data){ | |
//Update your dashboard gauge | |
salesGauge.setValue(data.value); | |
}, dataType: "json"}); | |
}, 30000); |
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