27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
// dqb 接口响应解码器（复刻页面 deStr+de：两字符一组 → 数值 → LZW 解压）
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// spe 接口=500×(c1-903)+(c2-903)；acc 接口=550×(c1-809)+(c2-809)
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// 用法: cat 响应 | node dqb_decode.js (spe,默认)
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// cat 响应 | node dqb_decode.js acc (acc 附件)
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function deStr(t, off, mul) {
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var e = [];
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for (var s = 0; s + 1 < t.length; s += 2)
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e.push(mul * (t[s].charCodeAt() - off) + (t[s + 1].charCodeAt() - off));
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return e;
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}
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function de(t) { // LZW 解压（字典从 256 起）
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var e, s, r, a, n = [], i = "", o = 256;
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for (e = 0; e < 256; e += 1) n[e] = String.fromCharCode(e);
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for (s = String.fromCharCode(t[0]), r = s, e = 1; e < t.length; e += 1) {
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a = t[e];
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if (n[a]) i = n[a];
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else { if (a !== o) return null; i = s + s.charAt(0); }
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r += i; n[o++] = s + i.charAt(0); s = i;
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}
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return r;
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}
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var fs = require("fs");
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var isAcc = (process.argv[2] === "acc");
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var input = fs.readFileSync(0, "utf-8");
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var text = de(deStr(input.trim(), isAcc ? 809 : 903, isAcc ? 550 : 500));
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process.stdout.write(text || "(解码失败)");
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