判断访问用户终端设备类型

PetitQ HTML/CSS 2018-11-08 1.56K 0 1

以前判断网站的访客全部用的是 userAgent 来判断的，基本上都是判断 userAgent，一些简单点的终端没有什么问题，可是用过一段时间发现有的手机终端不会跳转，后面研究了下百度 siteapp，发现他的函数写的挺好的，可以直接拿来用，判断的也比较全面。

使用 userAgent

判断（iPhone|iPod|Android|ios|iPad）

也想出现在这里？联系我们吧

```
function uaredirect(murl) {
```
```
    try {
```

        if (document.getElementById("bdmark") != null) {

```
            return;
```
```
        }
```

        var urlhash = window.location.hash;

        if (!urlhash.match("fromapp")) {

            if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iPad)/i))) {

```
                location.replace(murl);
```
```
            }
```
```
        }
```
```
    } catch(err) {}
```
```
}
```

使用百度 siteapp 判断

<script src="http://siteapp.baidu.com/static/webappservice/uaredirect.js" type="text/javascript"></script>

<script type="text/javascript">uaredirect("http://m.baidu.com");</script>

我们来看看 uaredirect 的源代码

```
function uaredirect(f) {
```
```
    try {
```

        if (document.getElementById("bdmark") != null) {

```
            return
```
```
        }
```
```
        var b = false;
```
```
        if (arguments[1]) {
```

            var e = window.location.host;

            var a = window.location.href;

            if (isSubdomain(arguments[1], e) == 1) {

```
                f = f + "/#m/" + a;
```
```
                b = true
```
```
            } else {
```

                if (isSubdomain(arguments[1], e) == 2) {

```
                    f = f + "/#m/" + a;
```
```
                    b = true
```
```
                } else {
```
```
                    f = a;
```
```
                    b = false
```
```
                }
```
```
            }
```
```
        } else {
```
```
            b = true
```
```
        }
```
```
        if (b) {
```

            var c = window.location.hash;

```
            if (!c.match("fromapp")) {
```

                if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios)/i))) {

```
                    location.replace(f)
```
```
                }
```
```
            }
```
```
        }
```
```
    } catch(d) {}
```
```
}
```
```
function isSubdomain(c, d) {
```
```
    this.getdomain = function(f) {
```
```
        var e = f.indexOf("://");
```
```
        if (e > 0) {
```
```
            var h = f.substr(e + 3)
```
```
        } else {
```
```
            var h = f
```
```
        }
```
```
        var g = /^www./;
```
```
        if (g.test(h)) {
```
```
            h = h.substr(4)
```
```
        }
```
```
        return h
```
```
    };
```
```
    if (c == d) {
```
```
        return 1
```
```
    } else {
```
```
        var c = this.getdomain(c);
```
```
        var b = this.getdomain(d);
```
```
        if (c == b) {
```
```
            return 1
```
```
        } else {
```
```
            c = c.replace(".", "\.");
```

            var a = new RegExp("\." + c + "$");

```
            if (b.match(a)) {
```
```
                return 2
```
```
            } else {
```
```
                return 0
```
```
            }
```
```
        }
```
```
    }
```
```
};
```

压缩代码

function uaredirect(f){try{if(document.getElementById("bdmark")!=null){return}var b=false;if(arguments[1]){var e=window.location.host;var a=window.location.href;if(isSubdomain(arguments[1],e)==1){f=f+"/#m/"+a;b=true}else{if(isSubdomain(arguments[1],e)==2){f=f+"/#m/"+a;b=true}else{f=a;b=false}}}else{b=true}if(b){var c=window.location.hash;if(!c.match("fromapp")){if((navigator.userAgent.match(/(iPhone|iPod|Android|ios)/i))){location.replace(f)}}}}catch(d){}}function isSubdomain(c,d){this.getdomain=function(f){var e=f.indexOf("://");if(e>0){var h=f.substr(e+3)}else{var h=f}var g=/^www./;if(g.test(h)){h=h.substr(4)}return h};if(c==d){return 1}else{var c=this.getdomain(c);var b=this.getdomain(d);if(c==b){return 1}else{c=c.replace(".","\.");var a=new RegExp("\."+c+"$");if(b.match(a)){return 2}else{return 0}}}};