• 优酷评论爬虫


        最近朋友有个爬取优酷评论的需求,所以自己也看了一下。直接看一下接口。

      

      这里不难找,直接点一下更多评论就出来了。那么分析一下这个接口的请求参数。

      

      最主要是还是这两个sign的生成,其他很多参数都是定值,而objectCode是视频的id,lastId是最后一条评论的id。那么就只要找出这两个sign的生成方法就可以了。

      那么直接搜索一下sign看下有没有。

      

      找一圈下来没有看到,那就看一下这个接口的调用栈。

      

       找到这个上图这个地方的时候就可以看到有点像参数的地方了,那么在这里打个断点看一下。

      

       点击加载后,就被断住了,看这里o的值,里面的data已经是完整的了,所以生成data的地方还在前面,那么就点右边的调用栈,在第一个value找到了这个data生成的地方。

      

       那么在这里打一个断点,重新请求一次。

      

       这里看到了data里面sign的生成方法,其中sign就是u,u是经过了Pe这个函数生成的,再加到c里面去,c就是data,那传进去Pe里面的值就是appSecret,app,time三个值通过&符号拼接起来的字符串,出来时间戳time其他的都是定值。下面就知道扣出Pe函数就可以了。放到Pe()上面就可以跳到函数实现的地方了。

      

      直接把这一段function(t)拿下来,在本地试一下。直接用上面的数据。 ,这里用到了node环境,所以还需要配置一下node.js的环境。

    import os
    
    
    data_sign = os.popen('node pe.js "100-DDwODVkv&6c4aa6af6560efff5df3c16c704b49f1&1640141704264"').read().replace("\n", "")
    print(data_sign)

      

       报错了,说是没有e这个函数,那就找e在哪里,直接选择Pe然后点进去发现,就是在Pe()上面,其实就是和Pe()在用一个函数下面。那就把这个函数除Pe()外的都复制过来。本就就是e就不用改了。再执行一下。

      

      一样的,好了,搞定一个sign了,那么还剩另一个sign了。一般一个请求的加密会放在同一个文件里面所以我直接就在这个文件里面查找了一个sign。很幸运,一下就找到了。

      

       断住这里再请求一次。点击右边的,可以看到n.data就是请求里面的data,sign就是参数里面的sign,它等于c那就找到c生成的地方。其实就在上面。

      

       

      c直接等于一个函数,但是它是一串值,所以看这个函数的最后面。

      

       函数后面跟着一个括号,就是函数定义的时候立刻执行了。里面的就是它的参数。四个值通过&符号链接起来,那么找到这个四个值,s是时间戳,a是appkey,一个定值,data就是刚刚生成好的data。那就剩一个token。

      

       这一个token找了好久是怎么生成的,先是找r是怎么来了,发现r是this的options对象,然后this又是什么,找了好久,看了一下这篇文章。https://blog.csdn.net/qq_42553568/article/details/88104452

      才知道,这是cookie里面的_m_h5_tk前面的这一段值。

       

      那cookie是在哪里设置的呢,也是看了上面的那文章,就是先让token为空请求一次接口,然后接口就会返回set-cookie,从_m_h5_tk拿出token,再带上token请求一次就可以了。知道方法,那就先把函数扣下来,看一下生成的sign对不对。

      直接把c = 的这个函数拿下来。直接用它的值试一下。

      

      

    import os
    
    
    # data_sign = os.popen('node pe.js "100-DDwODVkv&6c4aa6af6560efff5df3c16c704b49f1&1640141704264"').read().replace("\n", "")
    # print(data_sign)
    
    
    sign = os.popen('node pe.js "4990ca888bf40be6326a73184e39de31&1640144674066&24679788&{\\"app\\":\\"100-DDwODVkv\\",\\"time\\":1640144674056,\\"objectCode\\":\\"XNTIwMDQ3NTc2OA==\\",\\"objectType\\":1,\\"dataSource\\":\\"ALL_COMMENT_DATASOURCE\\",\\"page\\":3,\\"limit\\":10,\\"lastId\\":1000664893159,\\"sign\\":\\"d46d3d2be52fd409eb4f678b5efca9f2\\"}"').read().replace("\n", "")
    print(sign)

      生成的值和上面的一样,那两个参数都找出来了,下面直接写代码就好了。这里要注意一个地方就是生成sign的参数里面是要有双引号的,一定要做转移,不然出来的结果是不一样的。

      代码就直接贴上来了。

      Pe.js

    function e(e, t) {
                var a = e[0]
                  , s = e[1]
                  , c = e[2]
                  , l = e[3];
                a = n(a, s, c, l, t[0], 7, -680876936),
                l = n(l, a, s, c, t[1], 12, -389564586),
                c = n(c, l, a, s, t[2], 17, 606105819),
                s = n(s, c, l, a, t[3], 22, -1044525330),
                a = n(a, s, c, l, t[4], 7, -176418897),
                l = n(l, a, s, c, t[5], 12, 1200080426),
                c = n(c, l, a, s, t[6], 17, -1473231341),
                s = n(s, c, l, a, t[7], 22, -45705983),
                a = n(a, s, c, l, t[8], 7, 1770035416),
                l = n(l, a, s, c, t[9], 12, -1958414417),
                c = n(c, l, a, s, t[10], 17, -42063),
                s = n(s, c, l, a, t[11], 22, -1990404162),
                a = n(a, s, c, l, t[12], 7, 1804603682),
                l = n(l, a, s, c, t[13], 12, -40341101),
                c = n(c, l, a, s, t[14], 17, -1502002290),
                a = r(a, s = n(s, c, l, a, t[15], 22, 1236535329), c, l, t[1], 5, -165796510),
                l = r(l, a, s, c, t[6], 9, -1069501632),
                c = r(c, l, a, s, t[11], 14, 643717713),
                s = r(s, c, l, a, t[0], 20, -373897302),
                a = r(a, s, c, l, t[5], 5, -701558691),
                l = r(l, a, s, c, t[10], 9, 38016083),
                c = r(c, l, a, s, t[15], 14, -660478335),
                s = r(s, c, l, a, t[4], 20, -405537848),
                a = r(a, s, c, l, t[9], 5, 568446438),
                l = r(l, a, s, c, t[14], 9, -1019803690),
                c = r(c, l, a, s, t[3], 14, -187363961),
                s = r(s, c, l, a, t[8], 20, 1163531501),
                a = r(a, s, c, l, t[13], 5, -1444681467),
                l = r(l, a, s, c, t[2], 9, -51403784),
                c = r(c, l, a, s, t[7], 14, 1735328473),
                a = i(a, s = r(s, c, l, a, t[12], 20, -1926607734), c, l, t[5], 4, -378558),
                l = i(l, a, s, c, t[8], 11, -2022574463),
                c = i(c, l, a, s, t[11], 16, 1839030562),
                s = i(s, c, l, a, t[14], 23, -35309556),
                a = i(a, s, c, l, t[1], 4, -1530992060),
                l = i(l, a, s, c, t[4], 11, 1272893353),
                c = i(c, l, a, s, t[7], 16, -155497632),
                s = i(s, c, l, a, t[10], 23, -1094730640),
                a = i(a, s, c, l, t[13], 4, 681279174),
                l = i(l, a, s, c, t[0], 11, -358537222),
                c = i(c, l, a, s, t[3], 16, -722521979),
                s = i(s, c, l, a, t[6], 23, 76029189),
                a = i(a, s, c, l, t[9], 4, -640364487),
                l = i(l, a, s, c, t[12], 11, -421815835),
                c = i(c, l, a, s, t[15], 16, 530742520),
                a = o(a, s = i(s, c, l, a, t[2], 23, -995338651), c, l, t[0], 6, -198630844),
                l = o(l, a, s, c, t[7], 10, 1126891415),
                c = o(c, l, a, s, t[14], 15, -1416354905),
                s = o(s, c, l, a, t[5], 21, -57434055),
                a = o(a, s, c, l, t[12], 6, 1700485571),
                l = o(l, a, s, c, t[3], 10, -1894986606),
                c = o(c, l, a, s, t[10], 15, -1051523),
                s = o(s, c, l, a, t[1], 21, -2054922799),
                a = o(a, s, c, l, t[8], 6, 1873313359),
                l = o(l, a, s, c, t[15], 10, -30611744),
                c = o(c, l, a, s, t[6], 15, -1560198380),
                s = o(s, c, l, a, t[13], 21, 1309151649),
                a = o(a, s, c, l, t[4], 6, -145523070),
                l = o(l, a, s, c, t[11], 10, -1120210379),
                c = o(c, l, a, s, t[2], 15, 718787259),
                s = o(s, c, l, a, t[9], 21, -343485551),
                e[0] = u(a, e[0]),
                e[1] = u(s, e[1]),
                e[2] = u(c, e[2]),
                e[3] = u(l, e[3])
            }
    function t(e, t, n, r, i, o) {
                return t = u(u(t, e), u(r, o)),
                u(t << i | t >>> 32 - i, n)
            }
    function n(e, n, r, i, o, a, s) {
                return t(n & r | ~n & i, e, n, o, a, s)
        }
    function r(e, n, r, i, o, a, s) {
                return t(n & i | r & ~i, e, n, o, a, s)
            }
    function i(e, n, r, i, o, a, s) {
                return t(n ^ r ^ i, e, n, o, a, s)
            }
    function o(e, n, r, i, o, a, s) {
                return t(r ^ (n | ~i), e, n, o, a, s)
            }
    function a(e) {
                var t, n = [];
                for (t = 0; t < 64; t += 4)
                    n[t >> 2] = e.charCodeAt(t) + (e.charCodeAt(t + 1) << 8) + (e.charCodeAt(t + 2) << 16) + (e.charCodeAt(t + 3) << 24);
                return n
            }
            var s = "0123456789abcdef".split("");
            function c(e) {
                for (var t = "", n = 0; n < 4; n++)
                    t += s[e >> 8 * n + 4 & 15] + s[e >> 8 * n & 15];
                return t
            }
            function u(e, t) {
                return e + t & 4294967295
            }
    
    function Pe(t) {
                return function(e) {
                    for (var t = 0; t < e.length; t++)
                        e[t] = c(e[t]);
                    return e.join("")
                }(function(t) {
                    /[\x80-\xFF]/.test(t) && (t = unescape(encodeURI(t))),
                    txt = "";
                    var n, r = t.length, i = [1732584193, -271733879, -1732584194, 271733878];
                    for (n = 64; n <= t.length; n += 64)
                        e(i, a(t.substring(n - 64, n)));
                    t = t.substring(n - 64);
                    var o = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
                    for (n = 0; n < t.length; n++)
                        o[n >> 2] |= t.charCodeAt(n) << (n % 4 << 3);
                    if (o[n >> 2] |= 128 << (n % 4 << 3),
                    n > 55)
                        for (e(i, o),
                        n = 0; n < 16; n++)
                            o[n] = 0;
                    return o[14] = 8 * r,
                    e(i, o),
                    i
                }(t))
            }
    
    console.log(Pe(process.argv[2]))

       sign.js

    function sign(e) {
                        function t(e, t) {
                            return e << t | e >>> 32 - t
                        }
                        function n(e, t) {
                            var n, r, i, o, a;
                            return i = 2147483648 & e,
                            o = 2147483648 & t,
                            a = (1073741823 & e) + (1073741823 & t),
                            (n = 1073741824 & e) & (r = 1073741824 & t) ? 2147483648 ^ a ^ i ^ o : n | r ? 1073741824 & a ? 3221225472 ^ a ^ i ^ o : 1073741824 ^ a ^ i ^ o : a ^ i ^ o
                        }
                        function r(e, r, i, o, a, s, c) {
                            return e = n(e, n(n(function(e, t, n) {
                                return e & t | ~e & n
                            }(r, i, o), a), c)),
                            n(t(e, s), r)
                        }
                        function i(e, r, i, o, a, s, c) {
                            return e = n(e, n(n(function(e, t, n) {
                                return e & n | t & ~n
                            }(r, i, o), a), c)),
                            n(t(e, s), r)
                        }
                        function o(e, r, i, o, a, s, c) {
                            return e = n(e, n(n(function(e, t, n) {
                                return e ^ t ^ n
                            }(r, i, o), a), c)),
                            n(t(e, s), r)
                        }
                        function a(e, r, i, o, a, s, c) {
                            return e = n(e, n(n(function(e, t, n) {
                                return t ^ (e | ~n)
                            }(r, i, o), a), c)),
                            n(t(e, s), r)
                        }
                        function s(e) {
                            var t, n = "", r = "";
                            for (t = 0; 3 >= t; t++)
                                n += (r = "0" + (e >>> 8 * t & 255).toString(16)).substr(r.length - 2, 2);
                            return n
                        }
                        var c, u, l, f, d, p, h, m, v, y;
                        for (y = function(e) {
                            for (var t, n = e.length, r = n + 8, i = 16 * ((r - r % 64) / 64 + 1), o = new Array(i - 1), a = 0, s = 0; n > s; )
                                a = s % 4 * 8,
                                o[t = (s - s % 4) / 4] = o[t] | e.charCodeAt(s) << a,
                                s++;
                            return a = s % 4 * 8,
                            o[t = (s - s % 4) / 4] = o[t] | 128 << a,
                            o[i - 2] = n << 3,
                            o[i - 1] = n >>> 29,
                            o
                        }(e = function(e) {
                            e = e.replace(/\r\n/g, "\n");
                            for (var t = "", n = 0; n < e.length; n++) {
                                var r = e.charCodeAt(n);
                                128 > r ? t += String.fromCharCode(r) : r > 127 && 2048 > r ? (t += String.fromCharCode(r >> 6 | 192),
                                t += String.fromCharCode(63 & r | 128)) : (t += String.fromCharCode(r >> 12 | 224),
                                t += String.fromCharCode(r >> 6 & 63 | 128),
                                t += String.fromCharCode(63 & r | 128))
                            }
                            return t
                        }(e)),
                        p = 1732584193,
                        h = 4023233417,
                        m = 2562383102,
                        v = 271733878,
                        c = 0; c < y.length; c += 16)
                            u = p,
                            l = h,
                            f = m,
                            d = v,
                            p = r(p, h, m, v, y[c + 0], 7, 3614090360),
                            v = r(v, p, h, m, y[c + 1], 12, 3905402710),
                            m = r(m, v, p, h, y[c + 2], 17, 606105819),
                            h = r(h, m, v, p, y[c + 3], 22, 3250441966),
                            p = r(p, h, m, v, y[c + 4], 7, 4118548399),
                            v = r(v, p, h, m, y[c + 5], 12, 1200080426),
                            m = r(m, v, p, h, y[c + 6], 17, 2821735955),
                            h = r(h, m, v, p, y[c + 7], 22, 4249261313),
                            p = r(p, h, m, v, y[c + 8], 7, 1770035416),
                            v = r(v, p, h, m, y[c + 9], 12, 2336552879),
                            m = r(m, v, p, h, y[c + 10], 17, 4294925233),
                            h = r(h, m, v, p, y[c + 11], 22, 2304563134),
                            p = r(p, h, m, v, y[c + 12], 7, 1804603682),
                            v = r(v, p, h, m, y[c + 13], 12, 4254626195),
                            m = r(m, v, p, h, y[c + 14], 17, 2792965006),
                            p = i(p, h = r(h, m, v, p, y[c + 15], 22, 1236535329), m, v, y[c + 1], 5, 4129170786),
                            v = i(v, p, h, m, y[c + 6], 9, 3225465664),
                            m = i(m, v, p, h, y[c + 11], 14, 643717713),
                            h = i(h, m, v, p, y[c + 0], 20, 3921069994),
                            p = i(p, h, m, v, y[c + 5], 5, 3593408605),
                            v = i(v, p, h, m, y[c + 10], 9, 38016083),
                            m = i(m, v, p, h, y[c + 15], 14, 3634488961),
                            h = i(h, m, v, p, y[c + 4], 20, 3889429448),
                            p = i(p, h, m, v, y[c + 9], 5, 568446438),
                            v = i(v, p, h, m, y[c + 14], 9, 3275163606),
                            m = i(m, v, p, h, y[c + 3], 14, 4107603335),
                            h = i(h, m, v, p, y[c + 8], 20, 1163531501),
                            p = i(p, h, m, v, y[c + 13], 5, 2850285829),
                            v = i(v, p, h, m, y[c + 2], 9, 4243563512),
                            m = i(m, v, p, h, y[c + 7], 14, 1735328473),
                            p = o(p, h = i(h, m, v, p, y[c + 12], 20, 2368359562), m, v, y[c + 5], 4, 4294588738),
                            v = o(v, p, h, m, y[c + 8], 11, 2272392833),
                            m = o(m, v, p, h, y[c + 11], 16, 1839030562),
                            h = o(h, m, v, p, y[c + 14], 23, 4259657740),
                            p = o(p, h, m, v, y[c + 1], 4, 2763975236),
                            v = o(v, p, h, m, y[c + 4], 11, 1272893353),
                            m = o(m, v, p, h, y[c + 7], 16, 4139469664),
                            h = o(h, m, v, p, y[c + 10], 23, 3200236656),
                            p = o(p, h, m, v, y[c + 13], 4, 681279174),
                            v = o(v, p, h, m, y[c + 0], 11, 3936430074),
                            m = o(m, v, p, h, y[c + 3], 16, 3572445317),
                            h = o(h, m, v, p, y[c + 6], 23, 76029189),
                            p = o(p, h, m, v, y[c + 9], 4, 3654602809),
                            v = o(v, p, h, m, y[c + 12], 11, 3873151461),
                            m = o(m, v, p, h, y[c + 15], 16, 530742520),
                            p = a(p, h = o(h, m, v, p, y[c + 2], 23, 3299628645), m, v, y[c + 0], 6, 4096336452),
                            v = a(v, p, h, m, y[c + 7], 10, 1126891415),
                            m = a(m, v, p, h, y[c + 14], 15, 2878612391),
                            h = a(h, m, v, p, y[c + 5], 21, 4237533241),
                            p = a(p, h, m, v, y[c + 12], 6, 1700485571),
                            v = a(v, p, h, m, y[c + 3], 10, 2399980690),
                            m = a(m, v, p, h, y[c + 10], 15, 4293915773),
                            h = a(h, m, v, p, y[c + 1], 21, 2240044497),
                            p = a(p, h, m, v, y[c + 8], 6, 1873313359),
                            v = a(v, p, h, m, y[c + 15], 10, 4264355552),
                            m = a(m, v, p, h, y[c + 6], 15, 2734768916),
                            h = a(h, m, v, p, y[c + 13], 21, 1309151649),
                            p = a(p, h, m, v, y[c + 4], 6, 4149444226),
                            v = a(v, p, h, m, y[c + 11], 10, 3174756917),
                            m = a(m, v, p, h, y[c + 2], 15, 718787259),
                            h = a(h, m, v, p, y[c + 9], 21, 3951481745),
                            p = n(p, u),
                            h = n(h, l),
                            m = n(m, f),
                            v = n(v, d);
                        return (s(p) + s(h) + s(m) + s(v)).toLowerCase()
                    }
    
    console.log(sign(process.argv[2]))

      youku.py

    import os
    import json
    import time
    import requests
    
    
    #  获取参数的data数据里面的sign
    def get_data_sign(t):
        app_secret = '6c4aa6af6560efff5df3c16c704b49f1'
        data_sign = os.popen('node pe.js "100-DDwODVkv&{}&{}"'.format(app_secret, t)).read().replace("\n", "")
        return data_sign
    
    
    #  获取参数的sign,需要token,token在cookie里面,第一次请求让token为空,会返回set—cookie里面有token,第二次请求带上token
    def get_sign(data, t, token):
        app_key = '24679788'
        data = token + '&' + t + '&' + app_key + '&' + data
        sign = os.popen('node sign.js "{}"'.format(data)).read().replace("\n", "")
        return sign
    
    
    #  获取data,data1用来生成参数的sian,data2用来生成参数的data数据里面的sign
    def get_data(video_id, page, last_id):
        t = str(round(time.time() * 1000))
        data_sign = get_data_sign(t)
        data1 = f'{{\\"app\\":\\"100-DDwODVkv\\",\\"time\\":{t},\\"objectCode\\":\\"{video_id}\\",\\"objectType\\":1,\\"dataSource\\":\\"ALL_COMMENT_DATASOURCE\\",\\"page\\":{page},\\"limit\\":10,\\"lastId\\":{last_id},\\"sign\\":\\"{data_sign}\\"}}'
        data2 = f'{{"app":"100-DDwODVkv","time":{t},"objectCode":"{video_id}","objectType":1,"dataSource":"ALL_COMMENT_DATASOURCE","page":{page},"limit":10,"lastId":{last_id},"sign":"{data_sign}"}}'
        return data1, data2
    
    
    def get_all_parameter(data_, token=''):
        t = str(round(time.time() * 1000))
        params = {
            'jsv': '2.6.1',
            'appKey': '24679788',
            't': t,
            'sign': get_sign(data_[0], t, token=token),
            'api': 'mtop.youku.ycp.comment.mainpage.module.get',
            'type': 'originaljson',
            'v': '1.0',
            'ecode': '1',
            'dataType': 'json',
            'data': data_[1]
        }
        return params
    
    
    def get_comment(video_id, page, last_id):
        datas = get_data(video_id, page, last_id)
        params = get_all_parameter(datas, '')
        url = 'https://acs.youku.com/h5/mtop.youku.ycp.comment.mainpage.module.get/1.0'
        session = requests.session()
        #  请求第一次,获取token
        resp = session.get(url, params=params)
        token = resp.cookies['_m_h5_tk'].split('_')[0]
        #  获取到token后,再请求一次
        params = get_all_parameter(datas, token)
        resp = session.get(url, params=params)
        d = json.loads(resp.text)
        with open('show.json', 'w')as fp:
            fp.write(json.dumps(d))
    
    
    if __name__ == '__main__':
        # 第一个参数视频id,第二个页码,第三个前一页的最后一个评论id
        get_comment('XNDkxODI3ODA0NA==', '4', '1000649450028')

      这里写到了一个json文件里面看一下。

      

      ok,有结果了。这里只是用作交流学习,还是不要用爬虫技术攻击别人的网站。最后一起交流,一起进步。

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  • 原文地址:https://www.cnblogs.com/liwill/p/15718963.html
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