parsing - IP Address Parser in Javascript - Stack Overflow

admin管理员组

文章数量:1340287

Looking for a good IP address parser for Javascript.

Ideally, it could take in an IP address as a string, then return an object containing all of the pieces of the IP Address, including the port.

Thanks!

Looking for a good IP address parser for Javascript.

Ideally, it could take in an IP address as a string, then return an object containing all of the pieces of the IP Address, including the port.

Thanks!

• javascript
• parsing
• ip-address

Share Improve this question Follow asked Feb 11, 2013 at 22:47 Chris DutrowChris Dutrow 50.5k6767 gold badges196196 silver badges262262 bronze badges 6

• 6 An IP address has no Port, what are you really trying to parse? an URL? – fiz Commented Feb 11, 2013 at 22:51
• I'm not an expert, but this munity seems to think that port handling should be included in an IP Parser: rosettacode/wiki/Parse_an_IP_Address – Chris Dutrow Commented Feb 11, 2013 at 22:56
• 2 @ChrisDutrow That munity has its terms confused. While connecting to a remote host over TCP/UDP does require an IP address/port pair, the two are distinct conceptually. – millimoose Commented Feb 11, 2013 at 23:09
• 1 @ChrisDutrow That's specific to the particular usage. IP Addresses do not include a port number themselves, but an application can group them together for its own purposes. In the case of window.location, this is the host, made up of the hostname (IP Address) and port. – Jonathan Lonowski Commented Feb 11, 2013 at 23:12
• 1 I cannot fathom why this has so many upvotes? Simply because I don't see what are the "pieces of the IP address" - that's just a bunch of numbers - so what? What's the point of this excercise? An IP address is a number, big deal. I'm really just curious. – Mörre Commented Feb 11, 2013 at 23:14

 |  Show 1 more ment

4 Answers 4

Sorted by: Reset to default 2

var v4 = '[\\d]{1-3}';
var v4d = '\\.';
var v4plete = v4+v4d+v4+v4d+v4+v4d+v4
var v6 = '[\\da-fA-F]{0-4}';
var v6d = ':';
var v6plete = v6+v6d+v6+v6d+v6+v6d+v6+v6d+v6+v6d+v6+v6d+v6+v6d+v6;
var regex = new RegExp('(' + v4plete + '(\\:\d+){0,1}|'
                           + '::|::1|'
                           + '\\[::\\]:\\d+|\\[::1\\]:\\d+|'
                           + v6plete + '|'
                           + '\\[' + v6plete + '\\]:\\d+' + ')', 'g');
var result = mystring.match(regex);

Note that this doesn't guarantee valid addresses (in the range 0-255 for IPv4, for example). But it should match ip's with or without the port.

 function parseIP(ip) {
   if(ip.match(/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3})/)!=null)  {
     ip = ip.match(/(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/);  //clean posible port or http://
      return ip.split(".");   //returns [a,b,c,d] array
   }
   else 
      return false;
 }

That will do it. Split method splits string by delimiter. Its opposite is Array.join(delimiter), which joins the array with optional delimiter between the pieces.

I came across this question while implementing Safe Browsing url canonicalization in JS. The answers here are helpful, and here's some JS I came up with that does octal & hex IP addresses, in case it's helpful to anyone else in the future:

function verifyIP4(address) {
  var ip4DecimalPattern = '^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))$';
  var ip4HexPattern = '^(?:(?:0x[0-9a-f]{1,2})\.){3}(?:0x[0-9a-f]{1,2})$';
  var ip4OctalPattern = '^(?:(?:03[1-7][0-7]|0[12][0-7]{1,2}|[0-7]{1,2})\.){3}(?:03[1-7][0-7]|0[12][0-7]{1,2}|[0-7]{1,2})$';

  var isIP4Decimal = isIP4Hex = isIP4Octal = false;
  var base = 10;

  isIP4Decimal = address.match(ip4DecimalPattern) != null;
  isIP4Hex = address.match(ip4HexPattern) != null;
  isIP4Octal = address.match(ip4OctalPattern) != null;

  if (isIP4Hex || isIP4Octal) {
    if (isIP4Hex) {
      base = 16;
    } else if (isIP4Octal) {
      base = 8;
    }
    return address.split('.').map(num => parseInt(num, base)).join('.');
  }
  return false;
}

This is what I came up with.

• It parses the old kind of IP addresses, not the new IPv6.
• It also does not do validation which would only be a hindrance for my use case.

::

// REGEX to break an ip address into parts
var ip_regex = /(\d+)\.(\d+)\.(\d+)\.(\d+)(?:\.(\d+))?(?::(\d+))?/ig;

// Parse the ip string into an object containing it's parts
var parse_ip_address = function(ip_string){

    // Use Regex to get the parts of the ip address
    var ip_parts = ip_regex.exec(ip_string);

    // Set ip address if the regex executed successfully
    if( ip_parts && ip_parts.length > 6 ){
        // Set up address object to elements in the list
        var ip_address = {
            'A':     ip_parts[1],
            'B':     ip_parts[2],
            'C':     ip_parts[3],
            'D':     ip_parts[4],
            'E':     ip_parts[5],
            'port':  ip_parts[6]
        }
        // Would rather not fiddle with 'undefined' value
        if( typeof ip_parts[5] != 'undefined') {
            ip_address[5] = null;
        }
    }

    // Return object
    return ip_parts;
};

本文标签： parsingIP Address Parser in JavascriptStack Overflow