javascript生成UUID的两种方式

作者: admin 分类: JavaScript 发布时间: 2015-02-11 13:27 ė2,726 浏览数 6没有评论

/*!
Math.uuid.js (v1.4)
http://www.broofa.com
mailto:robert@broofa.com
 
Copyright (c) 2010 Robert Kieffer
Dual licensed under the MIT and GPL licenses.
*/
 
/*
 * Generate a random uuid.
 *
 * USAGE: Math.uuid(length, radix)
 *   length - the desired number of characters
 *   radix  - the number of allowable values for each character.
 *
 * EXAMPLES:
 *   // No arguments  - returns RFC4122, version 4 ID
 *   >>> Math.uuid()
 *   "92329D39-6F5C-4520-ABFC-AAB64544E172"
 *
 *   // One argument - returns ID of the specified length
 *   >>> Math.uuid(15)     // 15 character ID (default base=62)
 *   "VcydxgltxrVZSTV"
 *
 *   // Two arguments - returns ID of the specified length, and radix. (Radix must be <= 62)
 *   >>> Math.uuid(8, 2)  // 8 character ID (base=2)
 *   "01001010"
 *   >>> Math.uuid(8, 10) // 8 character ID (base=10)
 *   "47473046"
 *   >>> Math.uuid(8, 16) // 8 character ID (base=16)
 *   "098F4D35"
 */
(function() {
  // Private array of chars to use
  var CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
 
  Math.uuid = function (len, radix) {
    var chars = CHARS, uuid = [], i;
    radix = radix || chars.length;
 
    if (len) {
      // Compact form
      for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
    } else {
      // rfc4122, version 4 form
      var r;
 
      // rfc4122 requires these characters
      uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
      uuid[14] = '4';
 
      // Fill in random data.  At i==19 set the high bits of clock sequence as
      // per rfc4122, sec. 4.1.5
      for (i = 0; i < 36; i++) {
        if (!uuid[i]) {
          r = 0 | Math.random()*16;
          uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
        }
      }
    }
 
    return uuid.join('');
  };
 
  // A more performant, but slightly bulkier, RFC4122v4 solution.  We boost performance
  // by minimizing calls to random()
  Math.uuidFast = function() {
    var chars = CHARS, uuid = new Array(36), rnd=0, r;
    for (var i = 0; i < 36; i++) {
      if (i==8 || i==13 ||  i==18 || i==23) {
        uuid[i] = '-';
      } else if (i==14) {
        uuid[i] = '4';
      } else {
        if (rnd <= 0x02) rnd = 0x2000000 + (Math.random()*0x1000000)|0;
        r = rnd & 0xf;
        rnd = rnd >> 4;
        uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
      }
    }
    return uuid.join('');
  };
 
  // A more compact, but less performant, RFC4122v4 solution:
  Math.uuidCompact = function() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
      var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
      return v.toString(16);
    });
  };
})();

/*!

Math.uuid.js (v1.4)

http://www.broofa.com

mailto:robert@broofa.com

Dual licensed under the MIT and GPL licenses.

* Generate a random uuid.

* USAGE: Math.uuid(length, radix)

* length - the desired number of characters

* radix - the number of allowable values for each character.

* EXAMPLES:

* // No arguments - returns RFC4122, version 4 ID

* >>> Math.uuid()

* "92329D39-6F5C-4520-ABFC-AAB64544E172"

* // One argument - returns ID of the specified length

* >>> Math.uuid(15) // 15 character ID (default base=62)

* "VcydxgltxrVZSTV"

* // Two arguments - returns ID of the specified length, and radix. (Radix must be <= 62)

* >>> Math.uuid(8, 2) // 8 character ID (base=2)

* "01001010"

* >>> Math.uuid(8, 10) // 8 character ID (base=10)

* "47473046"

* >>> Math.uuid(8, 16) // 8 character ID (base=16)

* "098F4D35"

(function() {

// Private array of chars to use

var CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');

Math.uuid = function (len, radix) {

var chars = CHARS, uuid = [], i;

radix = radix || chars.length;

if (len) {

// Compact form

for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];

} else {

// rfc4122, version 4 form

var r;

// rfc4122 requires these characters

uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';

uuid[14] = '4';

// Fill in random data. At i==19 set the high bits of clock sequence as

// per rfc4122, sec. 4.1.5

for (i = 0; i < 36; i++) {

if (!uuid[i]) {

r = 0 | Math.random()*16;

uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];

}

return uuid.join('');

};

// A more performant, but slightly bulkier, RFC4122v4 solution. We boost performance

// by minimizing calls to random()

Math.uuidFast = function() {

var chars = CHARS, uuid = new Array(36), rnd=0, r;

for (var i = 0; i < 36; i++) {

if (i==8 || i==13 || i==18 || i==23) {

uuid[i] = '-';

} else if (i==14) {

uuid[i] = '4';

} else {

if (rnd <= 0x02) rnd = 0x2000000 + (Math.random()*0x1000000)|0;

r = rnd & 0xf;

rnd = rnd >> 4;

uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];

}

return uuid.join('');

};

// A more compact, but less performant, RFC4122v4 solution:

Math.uuidCompact = function() {

return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {

var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);

return v.toString(16);

});

};

})();

/*

uuid.js - Version 0.2
JavaScript Class to create a UUID like identifier

Copyright (C) 2006-2008, Erik Giberti (AF-Design), All rights reserved.

This program is free software; you can redistribute it and/or modify it under 
the terms of the GNU General Public License as published by the Free Software 
Foundation; either version 2 of the License, or (at your option) any later 
version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY 
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with 
this program; if not, write to the Free Software Foundation, Inc., 59 Temple 
Place, Suite 330, Boston, MA 02111-1307 USA

The latest version of this file can be downloaded from
http://www.af-design.com/resources/javascript_uuid.php

HISTORY:
6/5/06 	- Initial Release
5/22/08 - Updated code to run faster, removed randrange(min,max) in favor of
          a simpler rand(max) function. Reduced overhead by using getTime() 
          method of date class (suggestion by James Hall).

KNOWN ISSUES:
- Still no way to get MAC address in JavaScript
- Research into other versions of UUID show promising possibilities 
  (more research needed)
- Documentation needs improvement

*/

// On creation of a UUID object, set it's initial value
function UUID(){
	this.id = this.createUUID();
}

// When asked what this Object is, lie and return it's value
UUID.prototype.valueOf = function(){ return this.id; }
UUID.prototype.toString = function(){ return this.id; }

//
// INSTANCE SPECIFIC METHODS
//

UUID.prototype.createUUID = function(){
	//
	// Loose interpretation of the specification DCE 1.1: Remote Procedure Call
	// described at http://www.opengroup.org/onlinepubs/009629399/apdxa.htm#tagtcjh_37
	// since JavaScript doesn't allow access to internal systems, the last 48 bits 
	// of the node section is made up using a series of random numbers (6 octets long).
	//  
	var dg = new Date(1582, 10, 15, 0, 0, 0, 0);
	var dc = new Date();
	var t = dc.getTime() - dg.getTime();
	var h = '-';
	var tl = UUID.getIntegerBits(t,0,31);
	var tm = UUID.getIntegerBits(t,32,47);
	var thv = UUID.getIntegerBits(t,48,59) + '1'; // version 1, security version is 2
	var csar = UUID.getIntegerBits(UUID.rand(4095),0,7);
	var csl = UUID.getIntegerBits(UUID.rand(4095),0,7);

	// since detection of anything about the machine/browser is far to buggy, 
	// include some more random numbers here
	// if NIC or an IP can be obtained reliably, that should be put in
	// here instead.
	var n = UUID.getIntegerBits(UUID.rand(8191),0,7) + 
			UUID.getIntegerBits(UUID.rand(8191),8,15) + 
			UUID.getIntegerBits(UUID.rand(8191),0,7) + 
			UUID.getIntegerBits(UUID.rand(8191),8,15) + 
			UUID.getIntegerBits(UUID.rand(8191),0,15); // this last number is two octets long
	return tl + h + tm + h + thv + h + csar + csl + h + n; 
}


//
// GENERAL METHODS (Not instance specific)
//


// Pull out only certain bits from a very large integer, used to get the time
// code information for the first part of a UUID. Will return zero's if there 
// aren't enough bits to shift where it needs to.
UUID.getIntegerBits = function(val,start,end){
	var base16 = UUID.returnBase(val,16);
	var quadArray = new Array();
	var quadString = '';
	var i = 0;
	for(i=0;i<base16.length;i++){
		quadArray.push(base16.substring(i,i+1));	
	}
	for(i=Math.floor(start/4);i<=Math.floor(end/4);i++){
		if(!quadArray[i] || quadArray[i] == '') quadString += '0';
		else quadString += quadArray[i];
	}
	return quadString;
}

// Numeric Base Conversion algorithm from irt.org
// In base 16: 0=0, 5=5, 10=A, 15=F
UUID.returnBase = function(number, base){
	//
	// Copyright 1996-2006 irt.org, All Rights Reserved.	
	//
	// Downloaded from: http://www.irt.org/script/146.htm	
	// modified to work in this class by Erik Giberti
	var convert = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
    if (number < base) var output = convert[number];
    else {
        var MSD = '' + Math.floor(number / base);
        var LSD = number - MSD*base;
        if (MSD >= base) var output = this.returnBase(MSD,base) + convert[LSD];
        else var output = convert[MSD] + convert[LSD];
    }
    return output;
}

// pick a random number within a range of numbers
// int b rand(int a); where 0 <= b <= a
UUID.rand = function(max){
	return Math.floor(Math.random() * max);
}

// end of UUID class file

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uuid.js - Version 0.2

JavaScript Class to create a UUID like identifier

This program is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free Software

Foundation; either version 2 of the License, or (at your option) any later

version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY

WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A

PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with

this program; if not, write to the Free Software Foundation, Inc., 59 Temple

Place, Suite 330, Boston, MA 02111-1307 USA

The latest version of this file can be downloaded from

http://www.af-design.com/resources/javascript_uuid.php

HISTORY:

6/5/06 - Initial Release

5/22/08 - Updated code to run faster, removed randrange(min,max) in favor of

a simpler rand(max) function. Reduced overhead by using getTime()

method of date class (suggestion by James Hall).

KNOWN ISSUES:

- Still no way to get MAC address in JavaScript

- Research into other versions of UUID show promising possibilities

(more research needed)

- Documentation needs improvement

// On creation of a UUID object, set it's initial value

function UUID(){

this.id = this.createUUID();

}

// When asked what this Object is, lie and return it's value

UUID.prototype.valueOf = function(){ return this.id; }

UUID.prototype.toString = function(){ return this.id; }

// INSTANCE SPECIFIC METHODS

UUID.prototype.createUUID = function(){

// Loose interpretation of the specification DCE 1.1: Remote Procedure Call

// described at http://www.opengroup.org/onlinepubs/009629399/apdxa.htm#tagtcjh_37

// since JavaScript doesn't allow access to internal systems, the last 48 bits

// of the node section is made up using a series of random numbers (6 octets long).

var dg = new Date(1582, 10, 15, 0, 0, 0, 0);

var dc = new Date();

var t = dc.getTime() - dg.getTime();

var h = '-';

var tl = UUID.getIntegerBits(t,0,31);

var tm = UUID.getIntegerBits(t,32,47);

var thv = UUID.getIntegerBits(t,48,59) + '1'; // version 1, security version is 2

var csar = UUID.getIntegerBits(UUID.rand(4095),0,7);

var csl = UUID.getIntegerBits(UUID.rand(4095),0,7);

// since detection of anything about the machine/browser is far to buggy,

// include some more random numbers here

// if NIC or an IP can be obtained reliably, that should be put in

// here instead.

var n = UUID.getIntegerBits(UUID.rand(8191),0,7) +

UUID.getIntegerBits(UUID.rand(8191),8,15) +

UUID.getIntegerBits(UUID.rand(8191),0,7) +

UUID.getIntegerBits(UUID.rand(8191),8,15) +

UUID.getIntegerBits(UUID.rand(8191),0,15); // this last number is two octets long

return tl + h + tm + h + thv + h + csar + csl + h + n;

}

// GENERAL METHODS (Not instance specific)

// Pull out only certain bits from a very large integer, used to get the time

// code information for the first part of a UUID. Will return zero's if there

// aren't enough bits to shift where it needs to.

UUID.getIntegerBits = function(val,start,end){

var base16 = UUID.returnBase(val,16);

var quadArray = new Array();

var quadString = '';

var i = 0;

for(i=0;i<base16.length;i++){

quadArray.push(base16.substring(i,i+1));

}

for(i=Math.floor(start/4);i<=Math.floor(end/4);i++){

if(!quadArray[i] || quadArray[i] == '') quadString += '0';

else quadString += quadArray[i];

}

return quadString;

}

// Numeric Base Conversion algorithm from irt.org

// In base 16: 0=0, 5=5, 10=A, 15=F

UUID.returnBase = function(number, base){

// Downloaded from: http://www.irt.org/script/146.htm

// modified to work in this class by Erik Giberti

var convert = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];

if (number < base) var output = convert[number];

else {

var MSD = '' + Math.floor(number / base);

var LSD = number - MSD*base;

if (MSD >= base) var output = this.returnBase(MSD,base) + convert[LSD];

else var output = convert[MSD] + convert[LSD];

}

return output;

}

// pick a random number within a range of numbers

// int b rand(int a); where 0 <= b <= a

UUID.rand = function(max){

return Math.floor(Math.random() * max);

}

// end of UUID class file

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