Method 'OPTIONS' already declared for route '*'

[zAlweNy26]

Sorry if this is not the right place to post this, but I don't know what else this error might refer to, I already tried asking the fastify community on Discord.

I get this error when registering the plugin @fastify/cors :

node_modules\fastify\lib\route.js:306
            throw new FST_ERR_DUPLICATED_ROUTE(opts.method, opts.url)
            ^
FastifyError [Error]: Method 'OPTIONS' already declared for route '*'
    at Object.addNewRoute (...\node_modules\fastify\lib\route.js:306:19)
    at Object.route (...\node_modules\fastify\lib\route.js:217:19)
    at Object.prepareRoute (...\node_modules\fastify\lib\route.js:150:18)
    at Object._options [as options] (...\node_modules\fastify\fastify.js:264:34)
    at fastifyCors (...\node_modules\@fastify\cors\index.js:42:11)
    at Plugin.exec (...\node_modules\avvio\plugin.js:130:19)
    at Boot.loadPlugin (...node_modules\avvio\plugin.js:272:10)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  code: 'FST_ERR_DUPLICATED_ROUTE',
  statusCode: 500
}

The problem is that I didn't register the route '*' so I don't know how to fix that.

Edit:
I found these pieces of code in your adapter, I think they are causing the error (?)

astro-fastify/lib/index.js

Line 60 in 482d3a3

fastify.all('/*', function (request) {

and this

astro-fastify/lib/server.js

Line 53 in 482d3a3

fastify.all('/*', async function (request, reply) {

[matthewp]

Sorry about this, I'll take a look. It's possible there are multiple * routes. We can probably do this another way.

[MBing]

I am running into the same issue with Astro 3.5.4.
I also tried this: https://docs.astro.build/en/guides/integrations-guide/node/#middleware
but then my client was only showing the static files (like robots.txt and manifest.json).

When using this adapter I am able to get the actual components & pages running, but I am having issues with the static files. That's why I wanted to use fastify.register(..) and also when using fastify.register(cors) I get this same error.

I assume that when using the register it will go automatically to all routes and then has a conflict because this was set before as shown above.