fatsify核心功能示例测试!!!

node_modules/fastify/docs/Reference/HTTP2.md

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+<h1 align="center">Fastify</h1>
+
+## HTTP2
+
+_Fastify_ supports HTTP2 over HTTPS (h2) or plaintext (h2c).
+
+Currently, none of the HTTP2-specific APIs are available through _Fastify_, but
+Node's `req` and `res` can be accessed through the `Request` and `Reply`
+interfaces. PRs are welcome.
+
+### Secure (HTTPS)
+
+HTTP2 is supported in all modern browsers __only over a secure connection__:
+
+```js
+'use strict'
+
+const fs = require('node:fs')
+const path = require('node:path')
+const fastify = require('fastify')({
+  http2: true,
+  https: {
+    key: fs.readFileSync(path.join(__dirname, '..', 'https', 'fastify.key')),
+    cert: fs.readFileSync(path.join(__dirname, '..', 'https', 'fastify.cert'))
+  }
+})
+
+fastify.get('/', function (request, reply) {
+  reply.code(200).send({ hello: 'world' })
+})
+
+fastify.listen({ port: 3000 })
+```
+
+[ALPN negotiation](https://datatracker.ietf.org/doc/html/rfc7301) allows
+support for both HTTPS and HTTP/2 over the same socket.
+Node core `req` and `res` objects can be either
+[HTTP/1](https://nodejs.org/api/http.html) or
+[HTTP/2](https://nodejs.org/api/http2.html). _Fastify_ supports this out of the
+box:
+
+```js
+'use strict'
+
+const fs = require('node:fs')
+const path = require('node:path')
+const fastify = require('fastify')({
+  http2: true,
+  https: {
+    allowHTTP1: true, // fallback support for HTTP1
+    key: fs.readFileSync(path.join(__dirname, '..', 'https', 'fastify.key')),
+    cert: fs.readFileSync(path.join(__dirname, '..', 'https', 'fastify.cert'))
+  }
+})
+
+// this route can be accessed through both protocols
+fastify.get('/', function (request, reply) {
+  reply.code(200).send({ hello: 'world' })
+})
+
+fastify.listen({ port: 3000 })
+```
+
+Test the new server with:
+
+```
+$ npx h2url https://localhost:3000
+```
+
+### Plain or insecure
+
+For microservices, HTTP2 can connect in plain text, but this is not
+supported by browsers.
+
+```js
+'use strict'
+
+const fastify = require('fastify')({
+  http2: true
+})
+
+fastify.get('/', function (request, reply) {
+  reply.code(200).send({ hello: 'world' })
+})
+
+fastify.listen({ port: 3000 })
+```
+
+Test the new server with:
+
+```
+$ npx h2url http://localhost:3000
+```
+