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Update: pr#1005 #22

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Jul 9, 2018
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Update: pr#1005 #22

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14 changes: 11 additions & 3 deletions docs/Server-Methods.md
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Original file line number Diff line number Diff line change
Expand Up @@ -188,14 +188,22 @@ fastify.register(function (instance, opts, next) {

`fastify.setNotFoundHandler(handler(request, reply))`：为 404 状态 (not found) 设置处理器 (handler) 函数。向 `fastify.register()` 传递不同的 [`prefix` 选项](https://github.com/fastify/docs-chinese/blob/master/docs/Plugins.md#route-prefixing-option)，就可以为不同的插件设置不同的处理器。这些处理器被视为常规的路由处理器，因此它们的请求会经历一个完整的 [Fastify 生命周期](https://github.com/fastify/docs-chinese/blob/master/docs/Lifecycle.md#lifecycle)。

你也可以为 404 处理器注册一个 [beforeHandler](https://www.fastify.io/docs/latest/Hooks/#beforehandler) 钩子。

```js
fastify.setNotFoundHandler(function (request, reply) {
// 默认的 not found 处理器
fastify.setNotFoundHandler({
beforeHandler: (req, reply, next) => {
req.body.beforeHandler = true
next()
}
}, function (request, reply) {
// 设置了 beforeHandler 钩子的默认 not found 处理器
})

fastify.register(function (instance, options, next) {
instance.setNotFoundHandler(function (request, reply) {
// '/v1' 开头的 URL 的 not found 处理器
// '/v1' 开头的 URL 的 not found 处理器，
// 未设置 beforeHandler 钩子
})
next()
}, { prefix: '/v1' })
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