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'use strict' const { test } = require('node:test') const Fastify = require('..') const maxHeaderSize = 1024 test('Should return 431 if request header fields are too large', async (t) => { t.plan(2) const fastify = Fastify({ http: { maxHeaderSize } }) fastify.route({ method: 'GET', url: '/', handler: (_req, reply) => { reply.send({ hello: 'world' }) } }) const fastifyServer = await fastify.listen({ port: 0 }) const result = await fetch(fastifyServer, { method: 'GET', headers: { 'Large-Header': 'a'.repeat(maxHeaderSize) } }) t.assert.ok(!result.ok) t.assert.strictEqual(result.status, 431) t.after(() => fastify.close()) }) test('Should return 431 if URI is too long', async (t) => { t.plan(2) const fastify = Fastify({ http: { maxHeaderSize } }) fastify.route({ method: 'GET', url: '/', handler: (_req, reply) => { reply.send({ hello: 'world' }) } }) const fastifyServer = await fastify.listen({ port: 0 }) const result = await fetch(`${fastifyServer}/${'a'.repeat(maxHeaderSize)}`) t.assert.ok(!result.ok) t.assert.strictEqual(result.status, 431) t.after(() => fastify.close()) })