【Node】B站随机视频

【Node】B站随机视频

一个人丶99

2025-02-18 16:53

阅读467

一个人丶99

2025-02-18 16:53

阅读 467

在线地址：B站随机视频

参考：带我去一个随机的B站视频！ BV 号规则 https://www.zhihu.com/question/381784377/answer/1099438784

代码：

结构

初始化项目

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npm init -y
npm install express axios

server.js

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js
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const express = require("express");
const axios = require("axios");
const app = express();
const port = 8102;

// BV转换所需的常量
const table = "fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF";
const tr = {};
for (let i = 0; i < 58; i++) {
  tr[table[i]] = i;
}
const s = [11, 10, 3, 8, 4, 6];
const xor = 177451812;
const add = 8728348608;

// AV号转BV号
function enc(x) {
  x = (x ^ xor) + add;
  const r = "BV1  4 1 7  ".split("");
  for (let i = 0; i < 6; i++) {
    r[s[i]] = table[Math.floor(x / Math.pow(58, i)) % 58];
  }
  return r.join("");
}

// 按年份范围生成随机BV号
function generateRandomBV() {
  const yearRanges = {
    2013: { min: 1, max: 1000000 },
    2014: { min: 1000001, max: 2000000 },
    2015: { min: 2000001, max: 4000000 },
    2016: { min: 4000001, max: 8000000 },
    2017: { min: 8000001, max: 16000000 },
    2018: { min: 16000001, max: 35000000 },
    2019: { min: 35000001, max: 60000000 },
    2020: { min: 60000001, max: 85000000 },
    2021: { min: 85000001, max: 500000000 },
    2022: { min: 500000001, max: 700000000 },
    2023: { min: 700000001, max: 835000000 },
    2024: { min: 835000001, max: 950000000 },
  };

  const years = Object.keys(yearRanges);
  const randomYear = years[Math.floor(Math.random() * years.length)];
  const range = yearRanges[randomYear];
  const avid = Math.floor(Math.random() * (range.max - range.min)) + range.min;

  return enc(avid);
}

// 验证BV号是否存在
async function verifyBV(bvid) {
  try {
    const response = await axios.get(
      `https://api.bilibili.com/x/web-interface/view?bvid=${bvid}`,
      {
        headers: {
          "User-Agent":
            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
          Referer: "https://www.bilibili.com",
        },
      }
    );

    return response.data.code === 0;
  } catch {
    return false;
  }
}

// 随机视频接口
app.get("/random", async (req, res) => {
  try {
    let bvid = generateRandomBV();
    while (!(await verifyBV(bvid))) {
      bvid = generateRandomBV();
    }
    res.json({ bvid });
  } catch (error) {
    console.error("Error:", error.message);
    res.status(500).json({ error: "Internal Server Error" });
  }
});

// 前端页面路由
app.get("/", (req, res) => {
  res.sendFile(__dirname + "/index.html");
});

// 启动服务
app.listen(port, () => {
  console.log(`服务运行在 http://localhost:${port}`);
});

index.html

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html
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<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>B站随机视频</title>
    <style>
      body {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        margin: 0;
        background: #f0f0f0;
      }
      .btn {
        padding: 20px 40px;
        font-size: 24px;
        background: #00a1d6;
        color: white;
        border: none;
        border-radius: 50px;
        cursor: pointer;
        transition: transform 0.2s;
      }
      .btn:hover {
        transform: scale(1.1);
      }
    </style>
  </head>
  <body>
    <button class="btn" onclick="getRandomVideo()">随机看个B站视频</button>

    <script>
      async function getRandomVideo() {
        try {
          const response = await fetch("/random");
          const data = await response.json();
          if (data.bvid) {
            window.open(`https://www.bilibili.com/video/${data.bvid}`, "_blank");
          }
        } catch (error) {
          console.error("Error:", error);
        }
      }
    </script>
  </body>
</html>

代码：

结构

目录

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