抽奖规则和去年一样取上证指数和最后指定日期最高楼。上一年的帖子/996196
今年取 2024-11-22 上证指数收盘价作为随机数种子，有效抽奖用户为 2024-11-22 帖子回复最高楼层前的所有所有人
去年的抽奖代码没有去重所有回复多个的用户中的概率高一点点，今年我用 ai 糊了一下。代码如下
const UA = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36';
async function handleRequest(tid, num, seedParam, maxFloor) {
if (!tid || isNaN(num)) {
console.error('请提供有效的帖子 ID 和抽奖人数');
return;
}
console.log(`Fetching OP for TID: ${tid}`);
const op = await getOp(tid);
console.log(`OP: ${op}`);
console.log(`Fetching all users for TID: ${tid}`);
const uniqueUserList = await getAllUser(tid, maxFloor);
console.log(`Unique Users: ${uniqueUserList.join(', ')}`);
const filteredUserList = uniqueUserList.filter(user => user !== op);
console.log(`Filtered Users: ${filteredUserList.join(', ')}`);
const userCount = filteredUserList.length;
console.log(`User Count: ${userCount}`);
const seed = seedParam !== null ? seedParam : userCount.toString();
console.log(`Seed: ${seed}`);
console.log(`Max Floor: ${maxFloor}`);
const combinedSeed = `${seed}-${maxFloor}`;
console.log(`Combined Seed: ${combinedSeed}`);
const shuffledList = shuffle(filteredUserList, combinedSeed);
console.log(`Shuffled Users: ${shuffledList.join(', ')}`);
const result = `符合条件的用户共有 ${filteredUserList.length} 人
抽奖结果:
${shuffledList.slice(0, num).join('\n')}`;
console.log(result);
}
async function getOp(tid) {
const url = `https://www.v2ex.com/amp/t/${tid}`;
console.log(`Fetching OP URL: ${url}`);
const response = await fetch(url, { headers: { 'User-Agent': UA } });
if (!response.ok) {
console.log(`Failed to fetch OP: ${response.status} ${response.statusText}`);
return null;
}
const text = await response.text();
const match = /<div class="topic_author">[\s\S]*?<amp-img[^>]+alt="([^"]+)"[\s\S]*?<\/div>/.exec(text);
console.log(`OP Match: ${match ? match[1] : null}`);
return match ? match[1].trim() : null;
}
async function getUserList(url, startIndex, endIndex) {
console.log(`Fetching User List URL: ${url}`);
const response = await fetch(url, { headers: { 'User-Agent': UA } });
if (!response.ok) {
console.log(`Failed to fetch User List: ${response.status} ${response.statusText}`);
return [];
}
const text = await response.text();
const replyItemRegex = /<div class="reply_item">([\s\S]*?)<\/div>/g;
let replyItemMatch;
const users = [];
let currentIndex = startIndex || 0;
while ((replyItemMatch = replyItemRegex.exec(text)) !== null) {
if (endIndex !== undefined && currentIndex >= endIndex) {
break;
}
const replyItem = replyItemMatch[1];
const altRegex = /<amp-img[^>]+alt="([^"]+)"[^>]*>/g;
const altMatch = altRegex.exec(replyItem);
if (altMatch) {
users.push(altMatch[1]);
}
currentIndex++;
}
console.log(`Matches: ${users.join(', ')}`);
return users;
}
async function getAllPages(tid) {
const url = `https://www.v2ex.com/amp/t/${tid}`;
console.log(`Fetching All Pages URL: ${url}`);
const response = await fetch(url, { headers: { 'User-Agent': UA } });
if (!response.ok) {
console.log(`Failed to fetch All Pages: ${response.status} ${response.statusText}`);
return [];
}
const text = await response.text();
const pageCountMatch = /\u5171 (\d+) \u9875/.exec(text);
const pageCount = pageCountMatch ? parseInt(pageCountMatch[1], 10) : 1;
console.log(`Page Count: ${pageCount}`);
const pages = [];
for (let i = 1; i <= pageCount; i++) {
pages.push(`${url}/${i}`);
}
return pages;
}
async function getAllUser(tid, maxFloor) {
const pages = await getAllPages(tid);
console.log(`Pages: ${pages.join(', ')}`);
let allUsers = [];
let currentFloor = 0;
for (let page of pages) {
const startIndex = currentFloor;
const endIndex = maxFloor !== undefined ? maxFloor : undefined;
const users = await getUserList(page, startIndex, endIndex);
allUsers = allUsers.concat(users);
currentFloor += users.length;
if (endIndex !== undefined && currentFloor >= endIndex) {
break;
}
}
const uniqueUsers = [];
const seen = new Set();
for (const user of allUsers) {
if (!seen.has(user)) {
uniqueUsers.push(user);
seen.add(user);
}
}
console.log(`Unique Users: ${uniqueUsers.join(', ')}`);
return uniqueUsers;
}
function shuffle(array, seed) {
const rng = lcg(seed);
console.log(`Shuffling with Seed: ${seed}`);
for (let i = array.length - 1; i > 0; i--) {
const j = Math.floor(rng() * (i + 1));
console.log(`Shuffling: i=${i}, j=${j}`);
if (array[i] !== undefined && array[j] !== undefined) {
[array[i], array[j]] = [array[j], array[i]];
} else {
console.log(`Error: array[i] or array[j] is undefined. i=${i}, j=${j}, array[i]=${array[i]}, array[j]=${array[j]}`);
}
}
return array;
}
function lcg(seed) {
let state = hashCode(seed);
console.log(`LCG State: ${state}`);
const a = 1664525;
const c = 1013904223;
const m = Math.pow(2, 32);
return function() {
state = (a * state + c) % m;
console.log(`LCG Next: ${state / m}`);
return state / m;
}
}
function hashCode(str) {
l
et hash = 0;
for (let i = 0; i < str.length; i++) {
const char = str.charCodeAt(i);
hash = ((hash << 5) - hash) + char;
hash |= 0;
}
return Math.abs(hash);
}
// Example usage:
handleRequest('123456', 3, seed123, 10);
这里的 '123456' 是帖子 ID ，3 是抽奖人数，'seed123' 是种子（可选），10 是最大楼层（可选）。
在 V2EX 网站里用浏览器 consele 运行就可以
为了方便 v 友进行类似抽奖我糊了一个 cloudflare work 来使用直接请求 https://v2ex.240801.xyz/?tid=12345&num=10&seed=12345&maxFloor=11（大佬别打，刚装上访问不了可能 cf 路由没设置好）这里的参数说明为 tid 为帖子 id num 为中奖人数 seed 为随机数种子 maxFloor 为最高楼层
下面是橙子链接请大家按需购买
ps 甜度不用担心，今年我们县的都甜。现摘现发没有清洗打腊，只要老家不下雨一般下单第二天就发货。室温 20 度以内还是很耐放的两三个星期没啥问题。有个卖橙子的微信群想加的加我微信 console.log(atob('enF3MjAwOA=='))拉群
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