How to use res.send([buffer]) without a content-type?

[jeroen]

I refactored my app to use in memory buffers instead of files. However an undesired side effect is that for all responses where we do res.send(buf) without setting an explicit res.type() express now defaults to:

Content-Type: application/octet-stream

I do not want this. Is there a workaround to use res.send(buffer) without setting any content-type automatically?

I know I can explicitly override it with res.type("bla/bla") but for many resources there is not a known type. In these cases I want to set no content-type response header.

I am using express 5.0.1.

[execaman]

as long as you're using res.send() automatic stuff for convenience by express is inevitable, but since it extends built-in structs you can res.write(buf) and res.end() to send the response without any of those conveniences (you'll have to do them manually if you want, e.g. content-length)

[SX110903]

puedes eliminar el content-type despues de hacer el send usando res.removeHeader antes, o directamente escribir con res.end() que no toca las cabeceras:

// opcion 1: quitar la cabecera antes
res.removeHeader("Content-Type")
res.send(buf)

// opcion 2: usar end() directamente, no infiere content-type
res.end(buf)

la diferencia es que res.send() tiene logica para detectar el tipo segun lo que le mandas, pero res.end() es mas bajo nivel y no hace eso. si no necesitas nada de lo que aporta send() quedarte con end() es lo mas simple