如何根据【抖音分享链接】去掉抖音水印

第一步:创建页面，建立表单
Request URL:  http://aliqb.cn/jx

Post提交地址：url=http%3A%2F%2Fv.douyin.com%2FH3TcB8%2F&time=1571021931&sig=93db48358b25e6df60c6f8f8e509a7f9&type=browser

 POST JSON数据：

url: http://v.douyin.com/H3TcB8/
time: 1571039285
sig: f8be86653e40884ce102d4027c2cae3a
type: browser

得到一个JSON:

{
comment_count: 10
digg_count: 1087
isUser: true
isVip: false
isucce: true
msg: "v0300fc30000bkc46gm0gekipjvdld8g"
photo: "http://p3.pstatp.com/origin/2912b0002df61e59f45c9"
voidename: "适合儿童多动症治疗的辅助方法@亲子微时光"
voideurl: "http://v6-default.ixigua.com/44e8042e50a224e5423db1eb6a96fec5/5da3f235/video/m/220051cc148be5045c1b948a214c8971b4e1162ba75b00008369b5d93941/?a=2012&br=633&cr=0&cs=0&dr=0&ds=3&er=&l=201910141057240100140481323106F9C3&lr=&rc=amdnbWxoM2o3bjMzNmkzM0ApOzU0NDQ1ZWVlNzVlOTs6aGc1aXNtaGRqM2BfLS1gLTBzc2M1L141YjAvXjYvL2JgL186Yw%3D%3D"
}

数据加密模式：

 (function ($) {
        var h
        var rotateLeft = function (lValue, iShiftBits) {
            return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
        }
        var addUnsigned = function (lX, lY) {
            var lX4, lY4, lX8, lY8, lResult;
            lX8 = (lX & 0x80000000);
            lY8 = (lY & 0x80000000);
            lX4 = (lX & 0x40000000);
            lY4 = (lY & 0x40000000);
            lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
            if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
            if (lX4 | lY4) {
                if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
                else return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
            } else {
                return (lResult ^ lX8 ^ lY8);
            }
        }
        var F = function (x, y, z) {
            return (x & y) | ((~x) & z);
        }
        var G = function (x, y, z) {
            return (x & z) | (y & (~z));
        }
        var H = function (x, y, z) {
            return (x ^ y ^ z);
        }
        var I = function (x, y, z) {
            return (y ^ (x | (~z)));
        }
        var FF = function (a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));
            return addUnsigned(rotateLeft(a, s), b);
        };
        var GG = function (a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));
            return addUnsigned(rotateLeft(a, s), b);
        };
        var HH = function (a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));
            return addUnsigned(rotateLeft(a, s), b);
        };
        var II = function (a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));
            return addUnsigned(rotateLeft(a, s), b);
        };
        var convertToWordArray = function (string) {
            var lWordCount;
            var lMessageLength = string.length;
            var lNumberOfWordsTempOne = lMessageLength + 8;
            var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
            var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;
            var lWordArray = Array(lNumberOfWords - 1);
            var lBytePosition = 0;
            var lByteCount = 0;
            while (lByteCount < lMessageLength) {
                lWordCount = (lByteCount - (lByteCount % 4)) / 4;
                lBytePosition = (lByteCount % 4) * 8;
                lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
                lByteCount++;
            }
            lWordCount = (lByteCount - (lByteCount % 4)) / 4;
            lBytePosition = (lByteCount % 4) * 8;
            lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
            lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
            lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
            return lWordArray;
        };
        var wordToHex = function (lValue) {
            var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount;
            for (lCount = 0; lCount <= 3; lCount++) {
                lByte = (lValue >>> (lCount * 8)) & 255;
                WordToHexValueTemp = "0" + lByte.toString(16);
                WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
            }
            return WordToHexValue;
        };
        var uTF8Encode = function (string) {
            string = string.replace(/x0dx0a/g, "x0a");
            var output = "";
            for (var n = 0; n < string.length; n++) {
                var c = string.charCodeAt(n);
                if (c < 128) {
                    output += String.fromCharCode(c);
                } else if ((c > 127) && (c < 2048)) {
                    output += String.fromCharCode((c >> 6) | 192);
                    output += String.fromCharCode((c & 63) | 128);
                } else {
                    output += String.fromCharCode((c >> 12) | 224);
                    output += String.fromCharCode(((c >> 6) & 63) | 128);
                    output += String.fromCharCode((c & 63) | 128);
                }
            }
            return output;
        };
        $.extend({
            a: function (string) {
                var x = Array();
                var k, AA, BB, CC, DD, a, b, c, d;
                var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
                var S21 = 5, S22 = 9, S23 = 14, S24 = 20;
                var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
                var S41 = 6, S42 = 10, S43 = 15, S44 = 21;
                string = uTF8Encode(string);
                x = convertToWordArray(string);
                a = 0x67452301;
                b = 0xEFCDAB89;
                c = 0x98BADCFE;
                d = 0x10325476;
                for (k = 0; k < x.length; k += 16) {
                    AA = a;
                    BB = b;
                    CC = c;
                    DD = d;
                    a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
                    d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
                    c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
                    b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
                    a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
                    d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
                    c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
                    b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
                    a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
                    d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
                    c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
                    b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
                    a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
                    d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
                    c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
                    b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
                    a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
                    d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
                    c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
                    b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
                    a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
                    d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);
                    c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
                    b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
                    a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
                    d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
                    c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
                    b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
                    a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
                    d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
                    c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
                    b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
                    a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
                    d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
                    c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
                    b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
                    a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
                    d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
                    c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
                    b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
                    a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
                    d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
                    c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
                    b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
                    a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
                    d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
                    c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
                    b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
                    a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);
                    d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
                    c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
                    b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
                    a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
                    d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
                    c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
                    b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
                    a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
                    d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
                    c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);
                    b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
                    a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
                    d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
                    c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
                    b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
                    a = addUnsigned(a, AA);
                    b = addUnsigned(b, BB);
                    c = addUnsigned(c, CC);
                    d = addUnsigned(d, DD);
                }
                var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
                return tempValue.toLowerCase();
            },
            cc: function (params, kAppKey, kAppSecret) {
                if (typeof params == "string") {
                    return $.b(params);
                } else if (typeof params == "object") {
                    var arr = [];
                    for (var i in params) {
                        arr.push((i + "=" + params[i]));
                    }
                    arr.sort();
                    h = arr.join(("&"));
                    return $.b(h);
                }
            },
            b: function (paramsStr) {
                var c = paramsStr + "&dd=" + $.a(h) + "3pfff254";
　　             return $.a(c);
            }
        });
    })(jQuery);

JS自定义脚本代码：

//$(function () {wan_index.ready();}
var douyin = {
    ready: function() {

　　　　this.initClick();

/*  $('.caption').addClass(".yc");*/
        $('.btn').hide();
    },
    initClick: function() {
        var me = this;
        //解析
        $('.button').off('click').on('click', function() {
            me.pushDataDetail($(this));
        });

        $('.btn.btn-off').off('click').on('click', function() {
            me.offnone($(this));
        });
    },

    pushDataDetail: function() {
        var me = this;
        var urls = $('.url').val();
        var regexp = /((http|https)://([w-]+.)+[w-]+(/[wu4e00-u9fa5-./?@\%!&=+~:#;\,]*)?)/ig;
        var urls = urls.match(regexp).toString();
        if (urls == "") {
            alert("请输入链接");
            return;
        }
        var time1 = Math.round(new Date() / 1000);
        var type1 = $('#type').text();
        var paramsObj = {
            time: time1,
            url: urls
        };
        var sig = $.cc(paramsObj, '123', '123');
        $.ajax({
            type: "POST",
            url: "/jx",
            contentType: "application/x-www-form-urlencoded",
            data: {
                "url": urls,
                "time": time1,
                "sig": sig,
                "type": "browser"
            },
            dataType: "text",
            success: function(data) {
                var o = JSON.parse(data);
                if (o.isucce == true) {
                    $('.btn.btn-url').attr('href', o.voideurl);
                    $('.btn.btn-info').attr('href', o.photo);
                    $('.btn.btn-url').show();
                    $('.btn.btn-info').show();
                    $('.btn.btn-off').show();
                } else {
                    alert("解析失败,请联系作者反馈");
                    $('.btn').hide();
                }
            },
            error: function(XMLHttpRequest, textStatus, errorThrown) {
                alert("解析失败：" + textStatus, "error");
                $('.btn').hide();
            }
        });
    },

    offnone: function() {
        var me = this;
        $('.url').val("");
        $('.btn').hide();
    },

    getUrlParam: function(name) {
        var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
        var r = window.location.search.substr(1).match(reg);
        if (r != null) {
            return decodeURI(r[2]);
        } else {
            return null;
        }
    },
}

事件监听JS: