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【JS】用户代理(环境)检测

2013-04-17 10:04 218 查看
client.js:

var client = function(){

//呈现引擎
var engine = {
ie: 0,
gecko: 0,
webkit: 0,
khtml: 0,
opera: 0,

//完整的版本号
ver: null
};

//浏览器
var browser = {

//主要的浏览器
ie: 0,
firefox: 0,
safari: 0,
konq: 0,
opera: 0,
chrome: 0,

//具体版本号
ver: null
};

//平台/设备/操作系统
var system = {
win: false,
mac: false,
x11: false,

//移动设备
iphone: false,
ipod: false,
ipad: false,
ios: false,
android: false,
nokiaN: false,
winMobile: false,

//游戏系统
wii: false,
ps: false
};

//给上面的属性对象赋值(具体的检测方法实现)
//检测呈现引擎和浏览器
var ua = navigator.userAgent;
if (window.opera){
engine.ver = browser.ver = window.opera.version();
engine.opera = browser.opera = parseFloat(engine.ver);
} else if (/AppleWebKit\/(\S+)/.test(ua)){
engine.ver = RegExp["$1"];
engine.webkit = parseFloat(engine.ver);

//确定是 Chrome or Safari
if (/Chrome\/(\S+)/.test(ua)){
browser.ver = RegExp["$1"];
browser.chrome = parseFloat(browser.ver);
} else if (/Version\/(\S+)/.test(ua)){
browser.ver = RegExp["$1"];
browser.safari = parseFloat(browser.ver);
} else {
//近似地确定版本号
var safariVersion = 1;
if (engine.webkit < 100){
safariVersion = 1;
} else if (engine.webkit < 312){
safariVersion = 1.2;
} else if (engine.webkit < 412){
safariVersion = 1.3;
} else {
safariVersion = 2;
}

browser.safari = browser.ver = safariVersion;
}
} else if (/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)){
engine.ver = browser.ver = RegExp["$1"];
engine.khtml = browser.konq = parseFloat(engine.ver);
} else if (/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){
engine.ver = RegExp["$1"];
engine.gecko = parseFloat(engine.ver);

//确定是不是 Firefox
if (/Firefox\/(\S+)/.test(ua)){
browser.ver = RegExp["$1"];
browser.firefox = parseFloat(browser.ver);
}
} else if (/MSIE ([^;]+)/.test(ua)){
engine.ver = browser.ver = RegExp["$1"];
engine.ie = browser.ie = parseFloat(engine.ver);
}

//检测浏览器
browser.ie = engine.ie;
browser.opera = engine.opera;

//检测平台
var p = navigator.platform;
system.win = p.indexOf("Win") == 0;
system.mac = p.indexOf("Mac") == 0;
system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);

//检测 windows 操作系统
if (system.win){
if (/Win(?:dows )?([^do]{2})\s?(\d+\.\d+)?/.test(ua)){
if (RegExp["$1"] == "NT"){
switch(RegExp["$2"]){
case "5.0":
system.win = "2000";
break;
case "5.1":
system.win = "XP";
break;
case "6.0":
system.win = "Vista";
break;
case "6.1":
system.win = "7";
break;
default:
system.win = "NT";
break;
}
} else if (RegExp["$1"] == "9x"){
system.win = "ME";
} else {
system.win = RegExp["$1"];
}
}
}

//移动设备
system.iphone = ua.indexOf("iPhone") > -1;
system.ipod = ua.indexOf("iPod") > -1;
system.ipad = ua.indexOf("iPad") > -1;
system.nokiaN = ua.indexOf("NokiaN") > -1;

//windows mobile
if (system.win == "CE"){
system.winMobile = system.win;
} else if (system.win == "Ph"){
if(/Windows Phone OS (\d+.\d+)/.test(ua)){;
system.win = "Phone";
system.winMobile = parseFloat(RegExp["$1"]);
}
}

//检测 iOS 版本
if (system.mac && ua.indexOf("Mobile") > -1){
if (/CPU (?:iPhone )?OS (\d+_\d+)/.test(ua)){
system.ios = parseFloat(RegExp.$1.replace("_", "."));
} else {
system.ios = 2;  //can't really detect - so guess
}
}

//检测 Android 版本
if (/Android (\d+\.\d+)/.test(ua)){
system.android = parseFloat(RegExp.$1);
}

//游戏系统
system.wii = ua.indexOf("Wii") > -1;
system.ps = /playstation/i.test(ua);

//返回这些对象
return {
engine:     engine,
browser:    browser,
system:     system
};

}();


调用的HTML页面：

<!DOCTYPE html>
<html>
<head>
<title>客户端检测</title>
<script type="text/javascript" src="client.js"></script>
</head>
<body>
<h2>呈现引擎</h2>
<ul>
<li>client.engine.ie = <script>document.write(client.engine.ie);</script></li>
<li>client.engine.webkit = <script>document.write(client.engine.webkit);</script></li>
<li>client.engine.gecko = <script>document.write(client.engine.gecko);</script></li>
<li>client.engine.khtml = <script>document.write(client.engine.khtml);</script></li>
<li>client.engine.opera = <script>document.write(client.engine.opera);</script></li>
<li>client.engine.ver = <script>document.write(client.engine.ver);</script></li>

</ul>
<h2>浏览器类型</h2>
<ul>
<li>client.browser.ie = <script>document.write(client.browser.ie);</script></li>
<li>client.browser.safari = <script>document.write(client.browser.safari);</script></li>
<li>client.browser.firefox = <script>document.write(client.browser.firefox);</script></li>
<li>client.browser.konq = <script>document.write(client.browser.konq);</script></li>
<li>client.browser.opera = <script>document.write(client.browser.opera);</script></li>
<li>client.browser.chrome = <script>document.write(client.browser.chrome);</script></li>
<li>client.browser.ver = <script>document.write(client.browser.ver);</script></li>
</ul>

<h2>操作系统类型</h2>
<ul>
<li>client.system.win = <script>document.write(client.system.win);</script></li>
<li>client.system.mac = <script>document.write(client.system.mac);</script></li>
<li>client.system.x11 = <script>document.write(client.system.x11);</script></li>
<li>client.system.iphone = <script>document.write(client.system.iphone);</script></li>
<li>client.system.ipod = <script>document.write(client.system.ipod);</script></li>
<li>client.system.ipad = <script>document.write(client.system.ipad);</script></li>
<li>client.system.ios = <script>document.write(client.system.ios);</script></li>
<li>client.system.android = <script>document.write(client.system.android);</script></li>
<li>client.system.nokiaN = <script>document.write(client.system.nokiaN);</script></li>
<li>client.system.winMobile = <script>document.write(client.system.winMobile);</script></li>
<li>client.system.wii = <script>document.write(client.system.wii);</script></li>
<li>client.system.ps = <script>document.write(client.system.ps);</script></li>
</ul>
</body>
</html>
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