直接给出Cloudflare Workers代码 
const CUSTOM_API_BASE_URL = CUSTOM_API_BASE_URL || 'https://替换成open webui的网址/api';
const CUSTOM_API_KEY = CUSTOM_API_KEY || '替换成你的token  在open webui设置里面可以获取';

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request));
});

async function handleRequest(request) {
  if (request.method !== 'POST') {
    return new Response('Method Not Allowed', ...