短地址工具

short.js

/**
 * @method hasher
 * @param {String} URL URL to be hashed
 * @returns {String} hash Base 62 hash representation of the URL
 **/

var hasher = exports.hasher = function(URL, length) {
    if (!length) length = 6;
    var AUID = [],
        CHARS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
    for (var i = 0; i < length; i++) {
        AUID.push(CHARS[Math.floor(Math.random()*62)]);
    }
    return AUID.join('');
};


/**
 * @method generate
 * @param {String} URL URL to create a Short URL of
 * @param {Functon} callback Callback to execute on completion
 **/

var generate = exports.generate = function( options, callback) {
    var timeStamp = require('os').uptime;
    var hashedURL
        , customData;
    // options takes an optional object literal
    // right now it only supports an options.length argument
    if (arguments.length === 2  && arguments[1] instanceof Function) {
        callback = arguments[1];
        hashedURL = hasher(timeStamp);
    } else if (arguments.length === 3  && arguments[1] instanceof Object && arguments[2] instanceof Function) {
        hashedURL = (options.length) ? hasher(timeStamp, options.length) : hasher(timeStamp);
        customData = (options.data) ? options.data : null;
    } else {
        throw new Error("generate requires a URL and callback function!");
    };
    callback(null, hashedURL);
};

generate({},function(error,o){
    console.log(o);
});