samples

.eslintrc.js

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+module.exports = {
+  env: {
+    browser: true,
+    commonjs: true,
+    es2021: true,
+  },
+  extends: ['airbnb-base'],
+  plugins: ['security'],
+  globals: {
+    Atomics: 'readonly',
+    SharedArrayBuffer: 'readonly',
+  },
+  parserOptions: {
+    ecmaVersion: 11,
+  },
+  rules: {
+    'no-unused-vars': ['error', { argsIgnorePattern: 'next' }],
+    'no-unused-expressions': [2, { allowShortCircuit: true }],
+    'no-return-await': 'off',
+    'class-methods-use-this': 'off',
+    'no-shadow': 'off',
+    'arrow-body-style': 'off',
+    'no-param-reassign': 'off',
+    'no-underscore-dangle': 'off',
+    'global-require': 'off',
+    'arrow-parens': 'off',
+  },
+};

.gitignore

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+.idea
+node_modules
+coverage
+.env
+
+# Created by https://www.toptal.com/developers/gitignore/api/node
+# Edit at https://www.toptal.com/developers/gitignore?templates=node
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc tests coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env*.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Storybook build outputs
+.out
+.storybook-out
+storybook-static
+
+# rollup.js default build output
+dist/
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# Temporary folders
+tmp/
+temp/
+
+# End of https://www.toptal.com/developers/gitignore/api/node
+
+test-report.xml
+
+.DS_Store
+
+ztest

headers-every-response/custom-route.js

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+const fp = require('fastify-plugin');
+
+module.exports = fp(async (fastify) => {
+  fastify.addHook('onSend', async (request, reply) => {
+    reply.headers({
+      'x-custom-header': 'foo',
+    });
+  });
+
+  fastify.get('/custom-route', async (req, res) => {
+    return { custom: 'route' };
+  });
+});

headers-every-response/index.js

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+const Fastify = require('fastify');
+const { deepEqual, equal } = require('node:assert/strict');
+
+(async () => {
+  const app = Fastify();
+
+  app.addHook('onSend', async (request, reply) => {
+    reply.headers({
+      'Cache-Control': 'no-store',
+      Pragma: 'no-cache',
+    });
+  });
+
+  await app.register(require('./custom-route'));
+
+  app.get('/', async (req, res) => {
+    return { hello: 'world' };
+  });
+
+  await app.listen({ port: 3000 });
+
+  const res = await app.inject({
+    method: 'GET',
+    url: '/',
+  });
+
+  deepEqual(res.statusCode, 200);
+  deepEqual(res.json(), { hello: 'world' });
+  equal(res.headers['cache-control'], 'no-store');
+  equal(res.headers.pragma, 'no-cache');
+
+  const resCustom = await app.inject({
+    method: 'GET',
+    url: '/custom-route',
+  });
+
+  deepEqual(resCustom.statusCode, 200);
+  deepEqual(resCustom.json(), { custom: 'route' });
+  equal(res.headers['x-custom-header'], 'foo');
+
+  await app.close();
+})();