我想使用长轮询。 我谷歌,发现很多有用的资源,并且因为很多,我越来越迷惑哪个更好。 以下是来自两个地方的三个代码片段。我应该使用以下哪种JavaScript长查询码?
https://gist.github.com/jasdeepkhalsa/4353139
// 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
});
})();
// 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);
})();
https://github.com/panique/php-long-polling/blob/master/client/client.js
function getContent(timestamp)
{
var queryString = {'timestamp' : timestamp};
$.ajax(
{
type: 'GET',
url: 'http://127.0.0.1/php-long-polling/server/server.php',
data: queryString,
success: function(data){
// put result data into "obj"
var obj = jQuery.parseJSON(data);
// put the data_from_file into #response
$('#response').html(obj.data_from_file);
// call the function again, this time with the timestamp we just got from server.php
getContent(obj.timestamp);
}
}
);
}
我的问题是它的代码是长轮询最佳做法? 我应该使用哪一个?
在此先感谢。
感谢您的意见与解释 – pmverma 2014-09-05 09:21:28