【发布时间】:2015-06-11 11:51:40
【问题描述】:
我正在使用 AJAX 从 PHP 文件中进行和检索 API 调用,然后使用 jQuery IF 语句来显示某些数据。
返回的数据有几种不同的状态,例如:“就绪”、“进行中”、“DNS”和“错误”。每个状态都有一条消息。
对于一个特定的状态,“进行中”,我想继续循环浏览 JavaScript 函数,直到状态更改为其他状态。如果状态为“进行中”,它最多可能需要 1 分钟才能更改,因此如果可能,我想以 5 秒的间隔循环浏览 JavaScript 函数。
我在下面包含了我的 jQuery。
$(document).ready(function() {
//Stops the submit request
$("#myAjaxRequestForm").submit(function(e){
e.preventDefault();
});
//checks for the button click event
$("#myButton").click(function(e){
$("#ajaxResponse").empty();
//get the form data and then serialize that
dataString = $("#myAjaxRequestForm").serialize();
//get the form data using another method
var hostName = $("input#hostName").val();
dataString = "host=" + hostName;
//make the AJAX request, dataType is set to json
//meaning we are expecting JSON data in response from the server
$.ajax({
type: "GET",
url: "api.php",
data: dataString,
dataType: "json",
//if received a response from the server
success: function( response ){
var data = response.status;
if ((data == 'READY' && response.endpoints[0].statusMessage == 'Ready' )) {
$("#ajaxResponse").append("<b>Status:</b> " + response.endpoints[0].statusMessage+ "<br>");
$("#ajaxResponse").append("<b>Host:</b> " + response.host+ "<br>");
$("#ajaxResponse").append("<b>Port:</b> " + response.port+ "<br>");
$("#ajaxResponse").append("<h3>Endpoint [0]</h3><b>Server Name:</b> " + response.endpoints[0].serverName+ "<br>");
$("#ajaxResponse").append("<b>IP Address:</b> " + response.endpoints[0].ipAddress+ "<br>");
$("#ajaxResponse").append("<b>Grade:</b> " + response.endpoints[0].grade+ "<br>");
$("#ajaxResponse").append("<h3>Endpoint [1]</h3><b>Server Name:</b> " + response.endpoints[1].serverName+ "<br>");
$("#ajaxResponse").append("<b>IP Address:</b> " + response.endpoints[1].ipAddress+ "<br>");
$("#ajaxResponse").append("<b>Grade:</b> " + response.endpoints[1].grade+ "<br>");
$("#ajaxResponse").append("<h3>Endpoint [2]</h3><b>Server Name:</b> " + response.endpoints[2].serverName+ "<br>");
$("#ajaxResponse").append("<b>IP Address:</b> " + response.endpoints[2].ipAddress+ "<br>");
$("#ajaxResponse").append("<b>Grade:</b> " + response.endpoints[2].grade+ "<br>");
}
else if ((data == 'READY' && response.endpoints[0].statusMessage != 'Ready')) {
$("#ajaxResponse").append("<b>Status: </b>" +response.endpoints[0].statusMessage+ "<br>");
$("#ajaxResponse").append("<b>Server Name: </b>" + response.endpoints[0].serverName+ "<br>");
$("#ajaxResponse").append("<b>IP Address: </b>" + response.endpoints[0].ipAddress+ "<br>");
}
else if (data == "DNS") {
$("#ajaxResponse").html("<div><b>No cached result found.<br><br>" +response.statusMessage+ "<br>..please wait a few mins and try again.</b></div>");
}
else if (data == "IN_PROGRESS") {
$("#ajaxResponse").html("<div><b>No cached result found.<br><br>" +response.endpoints[0].statusMessage+ "<br>..please wait a few mins and try again.</b></div>");
}
else if (data == "ERROR") {
$("#ajaxResponse").html("<div><b>Error.<br><br>" +response.statusMessage+ "<br></b></div>");
}
else {
$("#ajaxResponse").html("<div><b>error</b></div>");
}
},
});
});
});
【问题讨论】:
-
cycle through是什么意思?继续发出 ajax 请求? -
是的,没错。继续进行 ajax 调用。
-
仅供参考-当您开始多次重复相同的选择器时,最好将其缓存起来,这样就不必每次都进行 DOM 搜索。 DOM 搜索很昂贵