# 模式 ## API 路由 typescript // functions/api/todos/[id].ts export const onRequestGet: PagesFunction = async ({ env, params }) => { const todo = await env.DB.prepare('SELECT * FROM todos WHERE id = ?').bind(params.id).first(); if (!todo) return new Response('Not found', { status: 404 }); return Response.json(todo); }; export const onRequestPut: PagesFunction = async ({ env, params, request }) => { const body = await request.json(); await env.DB.prepare('UPDATE todos SET title = ?, completed = ? WHERE id = ?') .bind(body.title, body.completed, params.id).run(); return Response.json({ success: true }); }; // Also: onRequestDelete, onRequestPost ## 身份验证中间件 typescript // functions/_middleware.ts const auth: PagesFunction = async (context) => { if (context.request.url.includes('/public/')) return context.next(); const authHeader = context.request.headers.get('Authorization'); if (!authHeader?.startsWith('Bearer ')) { return new Response('Unauthorized', { status: 401 }); } try { const payload = await verifyJWT(authHeader.substring(7), context.env.JWT_SECRET); context.data.user = payload; return context.next(); } catch (err) { return new Response('Invalid token', { status: 401 }); } }; export const onRequest = [auth]; ## CORS typescript // functions/api/_middleware.ts const corsHeaders = { 'Access-Control-Allow-Origin': '*', 'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, OPTIONS', 'Access-Control-Allow-Headers': 'Content-Type, Authorization' }; export const onRequest: PagesFunction = async (context) => { if (context.request.method === 'OPTIONS') { return new Response(null, {headers: corsHeaders}); } const response = await context.next(); Object.entries(corsHeaders).forEach(([k, v]) => response.headers.set(k, v)); return response; }; ## 表单处理 typescript // functions/api/contact.ts export const onRequestPost: PagesFunction = async ({ request, env }) => { const formData = await request.formData(); await env.QUEUE.send({name: formData.get('name'), email: formData.get('email')}); return new Response('

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', { headers: { 'Content-Type': 'text/html' } }); }; ## 后台任务 typescript export const onRequestPost: PagesFunction = async ({ request, waitUntil }) => { const data = await request.json(); waitUntil(fetch('https://api.example.com/webhook', { method: 'POST', body: JSO