是谁发的微博微博图片

who-weibo.js

    function decodeBase62(number) {
        var alphabet = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
        var out = 0
        var len = number.length - 1
        for (var t = 0; t <= len; t++) {
            out = out + alphabet.indexOf(number.substr(t, 1)) * Math.pow(62, len - t)
        }
        return out
    }

    function decode16Unit(number) {
        return parseInt(number, 16)
    }

    function decode(number) {
        if (number.startsWith('00')) {
            return decodeBase62(number)
        } else {
            return decode16Unit(number)
        }
    }

    function findNumber(url) {
        var lastIndexOfSlash = url.lastIndexOf('/')
        var number = url.substr(lastIndexOfSlash + 1, 8)
        return number
    }

    function findUid(url) {
        var number = findNumber(url)
        var uid = decode(number)
        return uid
    }

    function constructHomePageUrl(uid) {
        var prefixUrl = 'http://weibo.com/u/'
        return prefixUrl + uid
    }

    function main(url) {
        var uid = findUid(url)
        var homePageUrl = constructHomePageUrl(uid)
        console.log(homePageUrl)
        return homePageUrl
    }

    // testDecodeBase62()
    // testDecode16Unit()
    // main('http://wx1.sinaimg.cn/mw690/41480b59ly1fj50powiqpj20qo4rhb29.jpg')