💡 WebDAV 使用说明：
• 坚果云：在坚果云开启WebDAV，使用应用密码
• ⚠️ 浏览器有CORS限制，直接请求会被阻止
• 解决方案：部署 Cloudflare Worker 作为 CORS 代理
• Worker 代理代码见下方 KV/D1 帮助说明（修改为代理模式即可）

💡 Cloudflare KV Worker 部署代码：

// Cloudflare Worker 代码 - KV 同步
const CORS_HEADERS = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
  'Access-Control-Allow-Headers': 'Content-Type, Authorization',
};
export default {
  async fetch(request, env) {
    if (request.method === 'OPTIONS') return new Response(null, {headers: CORS_HEADERS});
    const auth = request.headers.get('Authorization');
    if (auth !== `Bearer ${env.API_TOKEN}`) return new Response('Unauthorized', {status: 401, headers: CORS_HEADERS});
    const url = new URL(request.url);
    if (request.method === 'GET') {
      const key = url.searchParams.get('key');
      if (!key) return new Response('Missing key', {status: 400, headers: CORS_HEADERS});
      const value = await env.KV_NAMESPACE.get(key);
      if (value === null) return new Response('Not Found', {status: 404, headers: CORS_HEADERS});
      return new Response(JSON.stringify({value}), {headers: {...CORS_HEADERS, 'Content-Type': 'application/json'}});
    }
    if (request.method === 'POST') {
      const {key, value} = await request.json();
      if (!key || !value) return new Response('Missing key/value', {status: 400, headers: CORS_HEADERS});
      await env.KV_NAMESPACE.put(key, value);
      return new Response('OK', {headers: CORS_HEADERS});
    }
    return new Response('Method Not Allowed', {status: 405, headers: CORS_HEADERS});
  }
};
        

环境变量配置：
• API_TOKEN: 你的同步密码
• KV_NAMESPACE: KV Namespace 绑定
• 免费额度：10万次读取/天，1万次写入/天

💡 D1 数据库 Worker 部署代码：

// Cloudflare Worker 代码 - D1 同步
const CORS_HEADERS = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
  'Access-Control-Allow-Headers': 'Content-Type, Authorization',
};
export default {
  async fetch(request, env) {
    if (request.method === 'OPTIONS') return new Response(null, {headers: CORS_HEADERS});
    const auth = request.headers.get('Authorization');
    if (auth !== `Bearer ${env.API_TOKEN}`) return new Response('Unauthorized', {status: 401, headers: CORS_HEADERS});
    const url = new URL(request.url);
    const path = url.pathname;
    // 健康检查
    if (path === '/test') return new Response('OK', {headers: CORS_HEADERS});
    // 同步接口
    if (path === '/sync') {
      const deviceId = url.searchParams.get('deviceId');
      if (request.method === 'GET') {
        if (!deviceId) return new Response('Missing deviceId', {status: 400, headers: CORS_HEADERS});
        const row = await env.DB.prepare('SELECT data FROM sync_data WHERE device_id = ?').bind(deviceId).first();
        if (!row) return new Response('Not Found', {status: 404, headers: CORS_HEADERS});
        return new Response(JSON.stringify({data: JSON.parse(row.data)}), {headers: {...CORS_HEADERS, 'Content-Type': 'application/json'}});
      }
      if (request.method === 'POST') {
        const {deviceId: did, data} = await request.json();
        if (!did || !data) return new Response('Missing deviceId/data', {status: 400, headers: CORS_HEADERS});
        await env.DB.prepare('INSERT OR REPLACE INTO sync_data (device_id, data, updated_at) VALUES (?, ?, ?)').bind(did, JSON.stringify(data), Date.now()).run();
        return new Response('OK', {headers: CORS_HEADERS});
      }
    }
    return new Response('Not Found', {status: 404, headers: CORS_HEADERS});
  }
};
        

D1 数据库初始化 SQL：

CREATE TABLE IF NOT EXISTS sync_data (
  device_id TEXT PRIMARY KEY,
  data TEXT NOT NULL,
  updated_at INTEGER NOT NULL
);
        

环境变量配置：
• API_TOKEN: 你的同步密码
• DB: D1 数据库绑定
• 免费额度：500万行读取/天，10万行写入/天