✨ feat: 实现哔哩哔哩 wbi 签名鉴权 #48

package.json

@@ -33,6 +33,7 @@
     "dotenv": "^16.4.5",
     "feed": "^4.2.2",
     "hono": "^4.2.2",
+    "md5": "^2.3.0",
     "node-cache": "^5.1.2",
     "winston": "^3.13.0"
   },

src/routes/bilibili.ts

@@ -1,6 +1,7 @@
 import type { RouterData, ListContext, Options } from "../types.js";
 import type { RouterType } from "../router.types.js";
 import { get } from "../utils/getData.js";
+import getBiliWbi from "../utils/getBiliWbi.js";
 
 export const handleRoute = async (c: ListContext, noCache: boolean) => {
   const type = c.req.query("type") || "0";
@@ -41,11 +42,14 @@ export const handleRoute = async (c: ListContext, noCache: boolean) => {
 
 const getList = async (options: Options, noCache: boolean) => {
   const { type } = options;
-  const url = `https://api.bilibili.com/x/web-interface/ranking/v2?tid=${type}`;
+  const wbiData = await getBiliWbi();
+  const url = `https://api.bilibili.com/x/web-interface/ranking/v2?tid=${type}&type=all&${wbiData}`;
   const result = await get({
     url,
     headers: {
       Referer: `https://www.bilibili.com/ranking/all`,
+      "User-Agent":
+        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36",
     },
     noCache,
   });

src/utils/getBiliWbi.ts

@@ -0,0 +1,85 @@
+// 获取 Bilibili Web 端 WBI 签名鉴权
+import { getCache, setCache } from "./cache.js";
+import { get } from "./getData.js";
+import md5 from "md5";
+
+type EncodedKeys = {
+  img_key: string;
+  sub_key: string;
+};
+
+interface WbiParams {
+  [key: string]: string | number;
+}
+
+const mixinKeyEncTab = [
+  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,
+  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,
+  21, 56, 59, 6, 63, 57, 62, 11, 36, 20, 34, 44, 52,
+];
+
+// 对 imgKey 和 subKey 进行字符顺序打乱编码
+const getMixinKey = (orig: string): string =>
+  mixinKeyEncTab
+    .map((n) => orig[n])
+    .join("")
+    .slice(0, 32);
+
+// 为请求参数进行 wbi 签名
+const encWbi = (params: WbiParams, img_key: string, sub_key: string): string => {
+  const mixin_key = getMixinKey(img_key + sub_key);
+  const curr_time = Math.round(Date.now() / 1000);
+  const chr_filter = /[!'()*]/g;
+  // 添加 wts 字段
+  Object.assign(params, { wts: curr_time });
+  // 按照 key 重排参数
+  const query = Object.keys(params)
+    .sort()
+    .map((key) => {
+      // 过滤 value 中的 "!'()*" 字符
+      const value = params[key].toString().replace(chr_filter, "");
+      return `${encodeURIComponent(key)}=${encodeURIComponent(value)}`;
+    })
+    .join("&");
+  // 计算 w_rid
+  const wbi_sign = md5(query + mixin_key);
+  return query + "&w_rid=" + wbi_sign;
+};
+
+// 获取最新的 img_key 和 sub_key
+const getWbiKeys = async (): Promise<EncodedKeys> => {
+  const result = await get({
+    url: "https://api.bilibili.com/x/web-interface/nav",
+    headers: {
+      // SESSDATA 字段
+      Cookie: "SESSDATA=xxxxxx",
+      "User-Agent":
+        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3",
+      Referer: "https://www.bilibili.com/",
+    },
+  });
+  const img_url: string = result.data.wbi_img?.img_url ?? "";
+  const sub_url: string = result.data.wbi_img?.sub_url ?? "";
+  return {
+    img_key: img_url.slice(img_url.lastIndexOf("/") + 1, img_url.lastIndexOf(".")),
+    sub_key: sub_url.slice(sub_url.lastIndexOf("/") + 1, sub_url.lastIndexOf(".")),
+  };
+};
+
+const getBiliWbi = async (): Promise<string> => {
+  const cachedData = getCache("bilibili-wbi");
+  console.log(cachedData);
+  if (cachedData && typeof cachedData === "object" && "wbi" in cachedData) {
+    const { wbi } = cachedData as { wbi: string };
+    return wbi;
+  }
+  const web_keys = await getWbiKeys();
+  const params = { foo: "114", bar: "514", baz: 1919810 };
+  const img_key = web_keys.img_key;
+  const sub_key = web_keys.sub_key;
+  const query = encWbi(params, img_key, sub_key);
+  setCache("bilibili-wbi", { wbi: query });
+  return query;
+};
+
+export default getBiliWbi;