Integration with server functions

[monobyte]

Great work on the Better-Auth/Start integration, particularly the UI components. A real time saver!

Any chance of an example how to use it with server functions via middleware?
I've tried a few things but couldn't get it working.

[daveycodez]

Hey there is a lot of people trying to get SSR auth working right with TS Start in the Better Auth discord, I'm not sure of the best way just yet but I'll be tackling it soon

[lolimmlost]

Added server functions integration with Better-Auth middleware. Here's what was implemented:

Auth Middleware Helper (src/lib/auth-middleware.ts)

Three helper functions for different use cases:

• withAuth() - Wrapper for API route handlers with automatic 401 response
• requireAuth() - Throws Response for use in server functions
• getAuthSession() - Returns null if not authenticated

Server Functions Example (src/server/functions.ts)

Using createServerFn with auth middleware:

import { createServerFn } from '@tanstack/react-start'
import { getWebRequest } from '@tanstack/react-start/server'
import { requireAuth } from '@/lib/auth-middleware'

export const getUserAccounts = createServerFn({ method: 'GET' }).handler(async () => {
  const request = getWebRequest()
  const { user } = await requireAuth(request)
  
  // Your authenticated logic here
  return accounts
})

API Route Handler Pattern

Using withAuth wrapper:

GET: async ({ request }) => {
  return withAuth(request, async ({ user }) => {
    // Your authenticated logic here
    return new Response(JSON.stringify(data), { status: 200 })
  })
}

The accounts routes have been updated to use this pattern as well.