Responds with Blob and custom content-type from API Lambdas

[capybaraborn]

Hey!
I have a functionality to respond from my api with auto-generated simple graphic.

What I do:

1. I created a lambda (get).
2. I took useHonoContext and call:

const context = useHonoContext()
context.res.headers.set('Content-Type', 'image/png')

3. The function returns a Blob.

But the summary get result still responds with Content-Type: application/json and my blob was converted to the string.
I tried to create a middleware and mutate headers but my result - the same.

How I can return dynamic data with non json type?

Thanks!

[capybaraborn]

I found a "hack" from middleware:

  c.header('Content-Type', 'image/png')
  const graphic = await service.generate()
  return c.body(graphic as any)

But the same doesn't work from lambda and actually is better to use lambda scopes in order to have the clean logic. Is it possible?

[RuBAN-GT]

Found solution:

const context = useHonoContext()
context.res = new Response(new Uint8Array(graphic).buffer, {
  status: 200,
  headers: {
    'Content-Type': 'image/png',
  },
})

[zllkjc]

Nice haha, I didn't even think of this method. But this method is not very compatible with our code, but it works fine in hono.

Btw, what do you think of if we support directly returning a response:

const context = useHonoContext()
return new Response(new Uint8Array(graphic).buffer, {
  status: 200,
  headers: {
    'Content-Type': 'image/png',
  },
})

[RuBAN-GT]

Hey, @zllkjc
I think the direct Response support will be the best and clean solution.