feat: option disabling parsing in the onRequest phase

README.md

@@ -33,7 +33,8 @@ const fastify = require('fastify')()
 
 fastify.register(require('@fastify/cookie'), {
   secret: "my-secret", // for cookies signature
-  parseOptions: {}     // options for parsing cookies
+  hook: 'onRequest', // set to false to disable cookie autoparsing or set autoparsing on any of the following hooks: 'onRequest', 'preParsing', 'preHandler', 'preValidation'. default: 'onRequest'
+  parseOptions: {}  // options for parsing cookies
 })
 
 fastify.get('/', (req, reply) => {

plugin.js

@@ -50,19 +50,44 @@ function fastifyCookieClearCookie (reply, name, options) {
   return fastifyCookieSetCookie(reply, name, '', opts)
 }
 
-function onReqHandlerWrapper (fastify) {
-  return function fastifyCookieOnReqHandler (fastifyReq, fastifyRes, done) {
-    fastifyReq.cookies = {} // New container per request. Issue #53
-    const cookieHeader = fastifyReq.raw.headers.cookie
-    if (cookieHeader) {
-      fastifyReq.cookies = fastify.parseCookie(cookieHeader)
+function onReqHandlerWrapper (fastify, hook) {
+  return hook === 'preParsing'
+    ? function fastifyCookieHandler (fastifyReq, fastifyRes, payload, done) {
+      fastifyReq.cookies = {} // New container per request. Issue #53
+      const cookieHeader = fastifyReq.raw.headers.cookie
+      if (cookieHeader) {
+        fastifyReq.cookies = fastify.parseCookie(cookieHeader)
+      }
+      done()
     }
-    done()
+    : function fastifyCookieHandler (fastifyReq, fastifyRes, done) {
+      fastifyReq.cookies = {} // New container per request. Issue #53
+      const cookieHeader = fastifyReq.raw.headers.cookie
+      if (cookieHeader) {
+        fastifyReq.cookies = fastify.parseCookie(cookieHeader)
+      }
+      done()
+    }
+}
+
+function getHook (hook = 'onRequest') {
+  const hooks = {
+    onRequest: 'onRequest',
+    preParsing: 'preParsing',
+    preValidation: 'preValidation',
+    preHandler: 'preHandler',
+    [false]: false
   }
+
+  return hooks[hook]
 }
 
 function plugin (fastify, options, next) {
   const secret = options.secret
+  const hook = getHook(options.hook)
+  if (hook === undefined) {
+    return next(new Error('@fastify/cookie: Invalid value provided for the hook-option. You can set the hook-option only to false, \'onRequest\' , \'preParsing\' , \'preValidation\' or \'preHandler\''))
+  }
   const enableRotation = Array.isArray(secret)
   const algorithm = options.algorithm || 'sha256'
   const signer = typeof secret === 'string' || enableRotation ? new Signer(secret, algorithm) : secret
@@ -86,7 +111,9 @@ function plugin (fastify, options, next) {
   fastify.decorateReply('setCookie', setCookie)
   fastify.decorateReply('clearCookie', clearCookie)
 
-  fastify.addHook('onRequest', onReqHandlerWrapper(fastify))
+  if (hook) {
+    fastify.addHook(hook, onReqHandlerWrapper(fastify, hook))
+  }
 
   next()
 

test/cookie.test.js

@@ -847,3 +847,98 @@ test('should not decorate fastify, request and reply if no secret was provided',
     message: 'req.unsignCookie is not a function'
   })
 })
+
+test('dont add auto cookie parsing to onRequest-hook if hook-option is set to false', (t) => {
+  t.plan(6)
+  const fastify = Fastify()
+  fastify.register(plugin, { hook: false })
+
+  for (const hook of ['preValidation', 'preHandler', 'preParsing']) {
+    fastify.addHook(hook, async (req) => {
+      t.equal(req.cookies, null)
+    })
+  }
+
+  fastify.get('/disable', (req, reply) => {
+    t.equal(req.cookies, null)
+    reply.send()
+  })
+
+  fastify.inject({
+    method: 'GET',
+    url: '/disable',
+    headers: {
+      cookie: 'bar=bar'
+    }
+  }, (err, res) => {
+    t.error(err)
+    t.equal(res.statusCode, 200)
+  })
+})
+
+test('result in an error if hook-option is set to an invalid value', (t) => {
+  t.plan(1)
+  const fastify = Fastify()
+
+  t.rejects(
+    () => fastify.register(plugin, { hook: true }),
+    new Error("@fastify/cookie: Invalid value provided for the hook-option. You can set the hook-option only to false, 'onRequest' , 'preParsing' , 'preValidation' or 'preHandler'")
+  )
+})
+
+test('correct working plugin if hook-option to preParsing', (t) => {
+  t.plan(5)
+  const fastify = Fastify()
+  fastify.register(plugin, { hook: 'preParsing' })
+
+  fastify.addHook('onRequest', async (req) => {
+    t.equal(req.cookies, null)
+  })
+
+  fastify.addHook('preValidation', async (req) => {
+    t.equal(req.cookies.bar, 'bar')
+  })
+
+  fastify.get('/preparsing', (req, reply) => {
+    t.equal(req.cookies.bar, 'bar')
+    reply.send()
+  })
+
+  fastify.inject({
+    method: 'GET',
+    url: '/preparsing',
+    headers: {
+      cookie: 'bar=bar'
+    }
+  }, (err, res) => {
+    t.error(err)
+    t.equal(res.statusCode, 200)
+  })
+})
+
+test('if cookies are not set, then the handler creates an empty req.cookies object', (t) => {
+  t.plan(5)
+  const fastify = Fastify()
+  fastify.register(plugin, { hook: 'preParsing' })
+
+  fastify.addHook('onRequest', async (req) => {
+    t.equal(req.cookies, null)
+  })
+
+  fastify.addHook('preValidation', async (req) => {
+    t.ok(req.cookies)
+  })
+
+  fastify.get('/preparsing', (req, reply) => {
+    t.ok(req.cookies)
+    reply.send()
+  })
+
+  fastify.inject({
+    method: 'GET',
+    url: '/preparsing'
+  }, (err, res) => {
+    t.error(err)
+    t.equal(res.statusCode, 200)
+  })
+})

types/plugin.d.ts

@@ -125,8 +125,11 @@ declare namespace fastifyCookie {
     signed?: boolean;
   }
 
+  type HookType = 'onRequest' | 'preParsing' | 'preValidation' | 'preHandler'  | 'preSerialization';
+
   export interface FastifyCookieOptions {
     secret?: string | string[] | Signer;
+    hook?: HookType | false;
     parseOptions?: fastifyCookie.CookieSerializeOptions;
   }
 

types/plugin.test-d.ts

@@ -1,9 +1,10 @@
 import cookie from '..';
-import { expectType } from 'tsd';
+import { expectError, expectType } from 'tsd';
 import * as fastifyCookieStar from '..';
 import fastifyCookieCjsImport = require('..');
 import fastifyCookieDefault, { fastifyCookie as fastifyCookieNamed  } from '..';
-import fastify, { FastifyInstance,  FastifyReply, setCookieWrapper } from 'fastify';
+import fastify, { FastifyInstance,  FastifyPluginCallback,  FastifyReply, setCookieWrapper } from 'fastify';
+import { Server } from 'http';
 
 const fastifyCookieCjs = require('..');
 
@@ -213,4 +214,15 @@ new fastifyCookieStar.Signer('secretString')
 new fastifyCookieStar.Signer(['secretStringInArray'])
 const signer = new fastifyCookieStar.Signer(['secretStringInArray'], 'sha256')
 signer.sign('Lorem Ipsum')
-signer.unsign('Lorem Ipsum')
+signer.unsign('Lorem Ipsum')
+
+const appWithHook: FastifyInstance = fastify();
+
+appWithHook.register(cookie, { hook: false });
+appWithHook.register(cookie, { hook: 'onRequest' });
+appWithHook.register(cookie, { hook: 'preHandler' });
+appWithHook.register(cookie, { hook: 'preParsing' });
+appWithHook.register(cookie, { hook: 'preSerialization' });
+appWithHook.register(cookie, { hook: 'preValidation' });
+expectError(appWithHook.register(cookie, { hook: true }));
+expectError(appWithHook.register(cookie, { hook: 'false' }));