如何使用jquery
监控ajax请求的进度响应我调用一个在服务器上执行多次查找的API。一次调用可以导致5-10次查找。每次完成查找时,API都会在GET响应中附加一个字符串。完成所有查找后,将关闭连接。
我希望有一个在进度时触发的回调,并且最好找到一种在每次完成查找时解析服务器进度响应(访问数据)的方法。
我的问题是从不调用进程回调。
到目前为止,这是我的代码。我试图修补xmlHttpRequest对象并扩展jquery的ajax方法。
(function addXhrProgressEvent($) {
var originalXhr = $.ajaxSettings.xhr;
$.ajaxSetup({
xhr : function() {
var req = originalXhr(), that = this;
if (req) {
if ( typeof req.addEventListener == "function" && that.progress !== undefined) {
req.addEventListener("progress", function(evt) {
that.progress(evt);
}, false);
}
if ( typeof req.upload == "object" && that.progressUpload !== undefined) {
req.upload.addEventListener("progress", function(evt) {
that.progressUpload(evt);
}, false);
}
}
return req;
}
});
})(jQuery);
$('#update').on('click', function(e) {
e.preventDefault();
var json = $.ajax({
headers : {
'Authorization' : "Basic " + btoa("abced:becd")
},
url : "http://123.123.123.123:5487/api/v1/check/" + $(this).attr('data-key'),
type : "GET",
crossDomain : true,
dataType : "text",
async : false,
progress : function(evt) {
/*this does not fire*/
alert('callback fired!');
/*this does not fire*/
if (evt.lengthComputable) {
console.log("Loaded " + parseInt((evt.loaded / evt.total * 100), 10) + "%");
} else {
console.log("Length not computable.");
}
},
success : function(data, textStatus, jqXHR) {
},
error : function(jqXHR, textStatus, errorThrown) {
}
});
});
});
这是服务器的回复
['task 1 completed']
\n
\n
\n
['task 3 completed']
\n
\n
\n
['task 4 completed']
...
请求标题
Accept text/plain, */*; q=0.01
Accept-Encoding gzip, deflate
Accept-Language de,en-US;q=0.7,en;q=0.3
Authorization Basic 12123456020600662232112311==
Host 123.123.123.123:1234
Origin http://123.123.123.132
Referer http://123.123.123.123/index.php/db/SSRelaunch
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0
响应标题
Access-Control-Allow-Head... X-Requested-With, Content-Type, Authorization
Access-Control-Allow-Meth... GET,POST,PUT,OPTIONS
Access-Control-Allow-Orig... *
Content-Length 100000
Content-Type text/plain
Date Mon, 28 Jul 2014 18:06:27 GMT
Server BaseHTTP/0.3 Python/2.7.3
答案 0 :(得分:0)
jQuery ajax API中没有内置进度函数,但您可以添加事件侦听器来处理信息。
查看有关如何执行此问题的答案:
What is the cleanest way to get the progress of JQuery ajax request?