js版IPv6的正则表达式

JavaScript #ipv6 #正则表达式 #函数2012-07-10 10:14

大家都知道IPv4的正则表达式很好写，如下：

`1`	`^((25[0-5]\|2[0-4]\d\|[0-1]?\d{1,2})\.){3}(25[0-5]\|2[0-4]\d\|[0-1]?\d{1,2})$`

但是IPv6的格式相比较而言，就复杂了不止100倍啊，下面是IPv6格式的简单介绍：

1Format is x:x:x:x:x:x:x:x  
2x is a 16 bit hexadecimal field  
3FEDC:BA98:7654:3210:FEDC:BA98:7654:3210  
4Leading zeros in a field are optional  
5:: can be used to represent multiple groups of 16 bits of zero  
6:: can only be used once in an address  
7FF01:0:0:0:0:0:0:101 = FF01::101  
80:0:0:0:0:0:0:1 = ::1  
90:0:0:0:0:0:0:0 = ::

不知道谁可以给出一个验证IPv6的正则表达式啊？或者，用迂回的方法也行，即可以通过代码进行判断。

在网上找到一个IPv6的表达式，如下：

1 ^\s*((([0-9A-Fa-f]{1,4}:){7}(([0-9A-Fa-f]{1,4})|:))|(([0-9A-Fa-f]{1,4}:){6}(:|((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})|(:[0-9A-Fa-f]{1,4})))|(([0-9A-Fa-f]{1,4}:){5}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:){4}(:[0-9A-Fa-f]{1,4}){0,1}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:){3}(:[0-9A-Fa-f]{1,4}){0,2}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:){2}(:[0-9A-Fa-f]{1,4}){0,3}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(([0-9A-Fa-f]{1,4}:)(:[0-9A-Fa-f]{1,4}){0,4}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(:(:[0-9A-Fa-f]{1,4}){0,5}((:((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|((:[0-9A-Fa-f]{1,4}){1,2})))|(((25[0-5]|2[0-4]\d|[01]?\d{1,2})(\.(25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))(%.+)?\s*$

但是这么复杂得无法进行判断啊。

我自己用JAVASCRIPT写了一个迂回的判断方法，如下，有问题，请指教：

01// http://yige.org check whether the str is a right IPv6 address  
02function checkIPv6(str) {  
03    var idx = str.indexOf("::");  
04    // there is no "::" in the ip address  
05    if (idx == -1) {  
06        var items = str.split(":");  
07        if (items.length != 8) {  
08            return false;  
09        } else {  
10            for (i in items) {  
11                if (!isHex(items[i])) {  
12                    return false;  
13                }  
14            }  
15            return true;  
16        }  
17    } else {  
18        // at least, there are two "::" in the ip address  
19        if (idx != str.lastIndexOf("::")) {  
20            return false;  
21        } else {  
22            var items = str.split("::");  
23            var items0 = items[0].split(":");  
24            var items1 = items[1].split(":");  
25            if ((items0.length + items1.length) > 7) {  
26                return false;  
27            } else {  
28                for (i in items0) {  
29                    if (!isHex(items0[i])) {  
30                        return false;  
31                    }  
32                }  
33                for (i in items1) {  
34                    if (!isHex(items1[i])) {  
35                        return false;  
36                    }  
37                }  
38                return true;  
39            }  
40        }  
41    }  
42}  
43   
44// check whether every char of the str is a Hex char(0~9,a~f,A~F)  
45function isHex(str) {  
46    if(str.length == 0 || str.length > 4) {  
47        return false;  
48    }  
49    str = str.toLowerCase();  
50    var ch;  
51    for(var i=0; i< str.length; i++) {  
52        ch = str.charAt(i);  
53        if(!(ch >= '0' && ch <= '9') && !(ch >= 'a' && ch <= 'f')) {  
54            return false;  
55        }  
56    }  
57    return true;  
58}

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