自制上报错误与监控性能

下面是简单核心代码,通过图片外链进行跨域get请求,可能存在一些安全性问题的做法,可以通过限制外链提高难度,或者通过ajax 的post请求进行跨域请求方法。具体请求可以自行设定。

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script type="text/javascript">
(function () {
try {
var report = function (id, obj,eventtype) {
obj.ua = navigator.userAgent;
obj.pageurl = location.href;

var json = "{" , arr = [];
for (var i in obj) {
arr.push('"'+ i + '"' +":" + '"' + obj[i] + '"');
}
json += arr.join(',');
json += "}";
var src = "http://127.0.0.1:7001/logservice?eventtype=" + eventtype + "&eventid=" + id +
"&extend=";
var img = new Image();
img.src = src + encodeURIComponent(json);
img.onload = img.onerror = function () {
img = null
}
};
if (window.addEventListener) {
var ingore = ["localhost"];
window.addEventListener("error", function (e) {
//抓取文件404报错
if (e.target && e.target.src) {
var obj = {};
obj.file = e.target.src;
for (var i = 0, len = ingore.length; i < len; i++) {
if (obj.file.indexOf(ingore[i]) > -1) {
return
}
}
report(404, obj,'jserror');
}
}, true);
}
window.onerror = function (msg, file, line) {
//抓取js常规报错
var obj = {};
obj.errmsg = msg;
obj.errfile = file;
obj.errline = line;
report(500, obj,'jserror');
}

window.onload = function()
{
setTimeout(function()
{
if (window.performance && window.performance.timing) {
//抓取页面性能时间
var perf = window.performance.timing ,obj = {};
var arr = ['navigationStart','domainLookupEnd','connectEnd','domContentLoadedEventEnd','loadEventEnd'];
arr.forEach(function(curv,i){
obj[curv] = perf[curv];
});
report(200, obj,'performance');
}
},1000);
}


} catch (e) {}
})();
</script>
</head>
<body>
<img src="http://www.test.com/aa.jpeg">
<img src="http://www.test.com/bb.jpeg">
<script type="text/javascript">
showme1();
</script>
</body>
</html>

注意 注释 的“抓取文件404报错”,“抓取js常规报错”,“抓取页面性能时间”,代码很好理解,将整个操作放在闭包内执行,以免污染外面。 这段代码必须放在head标签头部内,若头部有js外联,那该段代码必须放在js外联之上,若将这段代码放置类似在http://www.xxx.com/logservice.js,那代码如下:

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script type="text/javascript" src="http://www.xxx.com/logservice.js"></script>
<script type="text/javascript" src="其他js"></script>
</head>
<body>
//常规业务代码
</body>
</html>

在获取页面性能时间方面,先获取,后台再去计算。关于window.performance 方面,文章很多,具体里面每个单词代表的时间意义,可以自行搜查文档。如:前端性能监控方案window.performance 调研(转)