What is the issue you are having?

The DEFAULT_EXCLUDED_CONTENT_TYPES variable is sometimes not what users want. In my case, I want event-stream to be compressed because I'm using data-star and returning a lot of very compressible html.

A workaround I've been using for now has been to either edit the variable directly in the package in my virtual enviroment or:

from fastapi.middleware.gzip import GZipMiddleware
from starlette.middleware import gzip

app = FastAPI()
app.add_middleware(GZipMiddleware, minimum_size=1000, compresslevel=5)
gzip.DEFAULT_EXCLUDED_CONTENT_TYPES = ()

which is not pretty IMO... would like this to be configurable the same way minimum_size and compresslevel are.

The DEFAULT_EXCLUDED_CONTENT_TYPES variable is sometimes not what users want. In my case, I want event-stream to be compressed because I'm using data-star and returning a lot of very compressible html.

A workaround I've been using for now has been to either edit the variable directly in the package in my virtual enviroment or:

from fastapi.middleware.gzip import GZipMiddleware
from starlette.middleware import gzip

app = FastAPI()
app.add_middleware(GZipMiddleware, minimum_size=1000, compresslevel=5)
gzip.DEFAULT_EXCLUDED_CONTENT_TYPES = ()

which is not pretty IMO... would like this to be configurable the same way minimum_size and compresslevel are.

Your workaround still waits for the whole content to be sent before compressing, I don't think that's what you want anyway.

Yes, you're correct. Currently it needs to wait for the whole response to compress it but in my case that happened to work out because I was just sending one big SSE response (which I admit is not what most SSE usage looks like).

But besides my concrete need being a bit unusual, the general idea of making this configurable sounds pretty valid to me.

@Kludex The issue is excluded_content_types is hardcoded and there may be instances where the user doesn't want GZipMiddleware for particular content types especially for video and audio types. I also made it configurable so that user can add or remove.