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86 lines
2.8 KiB
TypeScript
86 lines
2.8 KiB
TypeScript
// 获取 Bilibili Web 端 WBI 签名鉴权
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import { getCache, setCache } from "../cache.js";
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import { get } from "../getData.js";
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import md5 from "md5";
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type EncodedKeys = {
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img_key: string;
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sub_key: string;
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};
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interface WbiParams {
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[key: string]: string | number;
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}
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const mixinKeyEncTab = [
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46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35, 27, 43, 5, 49, 33, 9, 42, 19, 29, 28,
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14, 39, 12, 38, 41, 13, 37, 48, 7, 16, 24, 55, 40, 61, 26, 17, 0, 1, 60, 51, 30, 4, 22, 25, 54,
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21, 56, 59, 6, 63, 57, 62, 11, 36, 20, 34, 44, 52,
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];
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// 对 imgKey 和 subKey 进行字符顺序打乱编码
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const getMixinKey = (orig: string): string =>
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mixinKeyEncTab
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.map((n) => orig[n])
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.join("")
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.slice(0, 32);
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// 为请求参数进行 wbi 签名
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const encWbi = (params: WbiParams, img_key: string, sub_key: string): string => {
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const mixin_key = getMixinKey(img_key + sub_key);
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const curr_time = Math.round(Date.now() / 1000);
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const chr_filter = /[!'()*]/g;
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// 添加 wts 字段
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Object.assign(params, { wts: curr_time });
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// 按照 key 重排参数
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const query = Object.keys(params)
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.sort()
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.map((key) => {
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// 过滤 value 中的 "!'()*" 字符
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const value = params[key].toString().replace(chr_filter, "");
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return `${encodeURIComponent(key)}=${encodeURIComponent(value)}`;
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})
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.join("&");
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// 计算 w_rid
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const wbi_sign = md5(query + mixin_key);
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return query + "&w_rid=" + wbi_sign;
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};
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// 获取最新的 img_key 和 sub_key
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const getWbiKeys = async (): Promise<EncodedKeys> => {
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const result = await get({
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url: "https://api.bilibili.com/x/web-interface/nav",
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headers: {
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// SESSDATA 字段
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Cookie: "SESSDATA=xxxxxx",
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"User-Agent":
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3",
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Referer: "https://www.bilibili.com/",
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},
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});
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const img_url: string = result.data.wbi_img?.img_url ?? "";
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const sub_url: string = result.data.wbi_img?.sub_url ?? "";
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return {
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img_key: img_url.slice(img_url.lastIndexOf("/") + 1, img_url.lastIndexOf(".")),
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sub_key: sub_url.slice(sub_url.lastIndexOf("/") + 1, sub_url.lastIndexOf(".")),
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};
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};
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const getBiliWbi = async (): Promise<string> => {
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const cachedData = getCache("bilibili-wbi");
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console.log(cachedData);
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if (cachedData && typeof cachedData === "object" && "wbi" in cachedData) {
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const { wbi } = cachedData as { wbi: string };
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return wbi;
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}
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const web_keys = await getWbiKeys();
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const params = { foo: "114", bar: "514", baz: 1919810 };
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const img_key = web_keys.img_key;
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const sub_key = web_keys.sub_key;
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const query = encWbi(params, img_key, sub_key);
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setCache("bilibili-wbi", { wbi: query });
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return query;
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};
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export default getBiliWbi;
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