逆向百度翻译

逆向步骤

1. 访问首页,https://fanyi.baidu.com/, 获取set-COOKIE
2. 第二次根据COOKIE 获取的首页包含token(正则匹配出来)
3. 算出sign,根据查询入参&＃xff0c;js逆向算出sign
4. 最终 COOKIE,sign,和 token 加上固定参数&＃xff0c;查询结果

具体步骤

1.第一次获取COOKIE,访问首页https://fanyi.baidu.com/

2. 保持COOKIE会话&＃xff0c;获取首页html中&＃xff0c;正则token

3.在控制台中搜索 sign: 找到查询的js, 抠出I(e)函数生成加密的sign方法

注意里面有window变量没有的&＃xff0c;需要断点手动替换下&＃xff0c;如下效果

js sign代码

function n(r, o) {for (var t &＃61; 0; t < o.length - 2; t &＃43;&＃61; 3) {var a &＃61; o.charAt(t &＃43; 2);a &＃61; a >&＃61; "a" ? a.charCodeAt(0) - 87 : Number(a),a &＃61; "&＃43;" &＃61;&＃61;&＃61; o.charAt(t &＃43; 1) ? r >>> a : r << a,r &＃61; "&＃43;" &＃61;&＃61;&＃61; o.charAt(t) ? r &＃43; a & 4294967295 : r ^ a}return r
};function e(r) {var o &＃61; r.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);var i &＃61; null;if (null &＃61;&＃61;&＃61; o) {var t &＃61; r.length;t > 30 && (r &＃61; "" &＃43; r.substr(0, 10) &＃43; r.substr(Math.floor(t / 2) - 5, 10) &＃43; r.substr(-10, 10))} else {for (var e &＃61; r.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), C &＃61; 0, h &＃61; e.length, f &＃61; []; h > C; C&＃43;&＃43;)"" !&＃61;&＃61; e[C] && f.push.apply(f, a(e[C].split(""))),C !&＃61;&＃61; h - 1 && f.push(o[C]);var g &＃61; f.length;g > 30 && (r &＃61; f.slice(0, 10).join("") &＃43; f.slice(Math.floor(g / 2) - 5, Math.floor(g / 2) &＃43; 5).join("") &＃43; f.slice(-10).join(""))}var u &＃61; void 0, l &＃61; "" &＃43; String.fromCharCode(103) &＃43; String.fromCharCode(116) &＃43; String.fromCharCode(107);u &＃61; null !&＃61;&＃61; i ? i : (i &＃61; "320305.131321201" || "") || "";for (var d &＃61; u.split("."), m &＃61; Number(d[0]) || 0, s &＃61; Number(d[1]) || 0, S &＃61; [], c &＃61; 0, v &＃61; 0; v < r.length; v&＃43;&＃43;) {var A &＃61; r.charCodeAt(v);128 > A ? S[c&＃43;&＃43;] &＃61; A : (2048 > A ? S[c&＃43;&＃43;] &＃61; A >> 6 | 192 : (55296 &＃61;&＃61;&＃61; (64512 & A) && v &＃43; 1 < r.length && 56320 &＃61;&＃61;&＃61; (64512 & r.charCodeAt(v &＃43; 1)) ? (A &＃61; 65536 &＃43; ((1023 & A) << 10) &＃43; (1023 & r.charCodeAt(&＃43;&＃43;v)),S[c&＃43;&＃43;] &＃61; A >> 18 | 240,S[c&＃43;&＃43;] &＃61; A >> 12 & 63 | 128) : S[c&＃43;&＃43;] &＃61; A >> 12 | 224,S[c&＃43;&＃43;] &＃61; A >> 6 & 63 | 128),S[c&＃43;&＃43;] &＃61; 63 & A | 128)}for (var p &＃61; m, F &＃61; "" &＃43; String.fromCharCode(43) &＃43; String.fromCharCode(45) &＃43; String.fromCharCode(97) &＃43; ("" &＃43; String.fromCharCode(94) &＃43; String.fromCharCode(43) &＃43; String.fromCharCode(54)), D &＃61; "" &＃43; String.fromCharCode(43) &＃43; String.fromCharCode(45) &＃43; String.fromCharCode(51) &＃43; ("" &＃43; String.fromCharCode(94) &＃43; String.fromCharCode(43) &＃43; String.fromCharCode(98)) &＃43; ("" &＃43; String.fromCharCode(43) &＃43; String.fromCharCode(45) &＃43; String.fromCharCode(102)), b &＃61; 0; b < S.length; b&＃43;&＃43;)p &＃43;&＃61; S[b],p &＃61; n(p, F);return p &＃61; n(p, D),p ^&＃61; s,0 > p && (p &＃61; (2147483647 & p) &＃43; 2147483648),p %&＃61; 1e6,p.toString() &＃43; "." &＃43; (p ^ m)
};e(&＃39;工作&＃39;);

最终结果(https://fanyi.baidu.com/v2transapi?from&＃61;zh&to&＃61;en):

接下来就是golang代码封装演示: