How do I set addContentTypeParser only to specific paths?

[adaboese]

Specifically, I have a catch-all route at the end.

app.all('*', async (request, reply) => {
  try {
    const handler = createRequestHandler({
      // https://github.com/remix-run/remix/issues/8343#issuecomment-1867179525
      // eslint-disable-next-line @typescript-eslint/prefer-ts-expect-error
      // @ts-ignore - expected type mismatch
      build: () => vite.ssrLoadModule('virtual:remix/server-build'),
    });

    return handler(request, reply);
  } catch (error) {
    return reply.status(500).send(error);
  }
});

I want to remove content-parser just for this route, i.e.

const noopContentParser: FastifyContentTypeParser = (
  _request,
  payload,
  done,
) => {
  done(null, payload);
};

app.addContentTypeParser('application/json', noopContentParser);
app.addContentTypeParser('*', noopContentParser);

I need this to make Fastify compatible with Vite/Remix setup: mcansh/remix-fastify#244

[matthyk]

Encapsulate your catch-all route within a plugin and remove all content-type parsers.

export default function (app) {
  app.removeAllContentTypeParsers()

  app.all('*', async (request, reply) => {
    try {
      const handler = createRequestHandler({
        // https://github.com/remix-run/remix/issues/8343#issuecomment-1867179525
        // eslint-disable-next-line @typescript-eslint/prefer-ts-expect-error
        // @ts-ignore - expected type mismatch
        build: () => vite.ssrLoadModule('virtual:remix/server-build'),
      });
  
      return handler(request, reply);
    } catch (error) {
      return reply.status(500).send(error);
    }
  });

  
}

[adaboese]

That works!