fastify 为所有路由设置回复头

Question

对于每条路线，我都必须键入相同的标题，如下所示。有没有办法全局设置这些 header ，以便默认情况下将它们用于每个路由，并且可以在每个路由的基础上进行覆盖？

fastify.post("/api/users", async (request, reply) => {
    try {
        reply
            .code(200)
             header("Access-Control-Allow-Origin", "http://localhost:3000")
            .header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")
            .header("Content-Type", "application/json; charset=utf-8")
            .send();
    } catch (error) {
        reply
            .code(400)
            .header("Access-Control-Allow-Origin", "http://localhost:3000")
            .header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")
            .header("Content-Type", "application/json; charset=utf-8")
            .send();
    }
});

Answer 1

你可以在使用send()之前设置一些header

fastify.addHook('preHandler', (req, repy, done) => {
  reply.header("key", "value")
  done()
})

fastify.post("api/users", async (req, reply) => {
  try {
    reply.code(200).send()
  } catch (err) {
    reply.code(400).send()
  }
})

但是我看到你想用CORS，为什么不用fastify-cors ？