0
我需要向我的腳本添加一個獲取當前服務器時間的函數。向腳本添加多個AJAX調用
我使用下面的PHP文件獲取服務器時間，以毫秒爲單位。
<?php
date_default_timezone_set('Europe/London');
$serverTime = round(microtime(true) * 1000);
echo json_encode($serverTime);
?>
然後我想補充一個Ajax請求「得到」 serverTime.PHP，並把它變成一個變量，以便正確地事情結束之前，我可以計算時間。
我目前使用此
var now = new Date().getTime();
現在我想刪除該行並添加我的Ajax請求得到了客戶的時間。
我曾嘗試加入如下代碼到腳本，但我不能讓它執行
function now()
{
this.ajax.open('GET', 'serverTime.php',
true);
this.ajax.send(null);
if (this.ajax.readyState != 4) return;
if (this.ajax.status == 200)
{
// get response
var now = eval ('('+this.ajax.responseText+')');
}
}
最終的結果是變量「NOW」包含serverTime.PHP
的輸出這裏是我的腳本，我試圖以各種方式添加anothert ajax get請求，但我不能讓它正常工作。
$.ajaxSetup({
type: 'GET',
headers: { "cache-control" : "no-cache" }
});
var PlayList = function (onUpdate, onError)
{
// store user callbacks
this.onUpdate = onUpdate;
this.onError = onError;
// setup internal event handlers
this.onSongEnd = onSongEnd.bind (this);
// allocate an Ajax handler
try
{
this.ajax = window.XMLHttpRequest
? new XMLHttpRequest()
: new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
// fatal error: could not get an Ajax handler
this.onError ("could not allocated Ajax handler");
}
this.ajax.onreadystatechange = onAjaxUpdate.bind(this);
// launch initial request
this.onSongEnd();
// ------------------------------------------
// interface
// ------------------------------------------
// try another refresh in the specified amount of seconds
this.retry = function (delay)
{
setTimeout (this.onSongEnd, delay*5000);
}
// ------------------------------------------
// ancillary functions
// ------------------------------------------
// called when it's time to refresh the playlist
function onSongEnd()
{
// ask for a playlist update
this.ajax.open('GET', 'playlist.php', // <-- reference your PHP script here
true);
this.ajax.send(null);
}
// called to handle Ajax request progress
function onAjaxUpdate()
{
if (this.ajax.readyState != 4) return;
if (this.ajax.status == 200)
{
// get response
var list = eval ('('+this.ajax.responseText+')');
// compute milliseconds remaining till the end of the current song
var start = new Date(list[0].date_played.replace(' ', 'T')).getTime();
var now = new Date ( ).getTime();
var d = start - now + 6500
+ parseInt(list[0].duration);
if (d < 0)
{
// no new song started, retry in 3 seconds
d = 3000;
}
else
{
// notify caller
this.onUpdate (list);
}
// schedule next refresh
setTimeout (this.onSongEnd, d);
}
else
{
// Ajax request failed. Most likely a fatal error
this.onError ("Ajax request failed");
}
}
}
var list = new PlayList (playlistupdate, playlisterror);
function playlistupdate (list)
{
for (var i = 0 ; i != list.length ; i++)
{
var song = list[i];
}
{
document.getElementById("list0artist").innerHTML=list[0].artist;
document.getElementById("list0title").innerHTML=list[0].title;
document.getElementById("list0label").innerHTML=list[0].label;
document.getElementById("list0albumyear").innerHTML=list[0].albumyear;
document.getElementById("list0picture").innerHTML='<img src="/testsite/covers/' + list[0].picture + '" width="170" height="170"/>';
document.getElementById("list1artist").innerHTML=list[1].artist;
document.getElementById("list1title").innerHTML=list[1].title;
document.getElementById("list1label").innerHTML=list[1].label;
document.getElementById("list1albumyear").innerHTML=list[1].albumyear;
document.getElementById("list1picture").innerHTML='<img src="/testsite/covers/' + list[1].picture + '" width="84" height="84"/>';
document.getElementById("list2artist").innerHTML=list[2].artist;
document.getElementById("list2title").innerHTML=list[2].title;
document.getElementById("list2label").innerHTML=list[2].label;
document.getElementById("list2albumyear").innerHTML=list[2].albumyear;
document.getElementById("list2picture").innerHTML='<img src="/testsite/covers/' + list[2].picture + '" width="84" height="84"/>';
document.getElementById("list3artist").innerHTML=list[3].artist;
document.getElementById("list3title").innerHTML=list[3].title;
document.getElementById("list3label").innerHTML=list[3].label;
document.getElementById("list3albumyear").innerHTML=list[3].albumyear;
document.getElementById("list3picture").innerHTML='<img src="/testsite/covers/' + list[3].picture + '" width="84" height="84"/>';
document.getElementById("list4artist").innerHTML=list[4].artist;
document.getElementById("list4title").innerHTML=list[4].title;
document.getElementById("list4label").innerHTML=list[4].label;
document.getElementById("list4albumyear").innerHTML=list[4].albumyear;
document.getElementById("list4picture").innerHTML='<img src="/testsite/covers/' + list[4].picture + '" width="84" height="84"/>';
$('.nowPlayNoAnimate').each(function() {
$(this).toggleClass('nowPlayAnimate', $(this).parent().width() < $(this).width());
});
}
}
function playlisterror (msg)
{
// display error message
console.log ("Ajax error: "+msg);
//retry
list.retry (10); // retry in 10 seconds
}
你發佈的這段代碼全部正常工作，並且你正試圖添加另一個電話？你能發表你試過的嗎？ – 2014-11-23 18:51:00
@Joe T我已經添加NOW功能，我一直在玩 – Justin 2014-11-23 19:06:02