Flask not streaming JSON response

Question

I have below flask application that should stream JSON response

Directory structure:

server - 
        api.py
        resources -
                   stream.py

api.py

from flask import Flask
from flask_restful import Api
from resources.stream import Stream
from flask_compress import Compress

compress = Compress()
app = Flask(__name__)
compress.init_app(app)
api = Api(app)
api.add_resource(Stream, '/stream')
if __name__ == '__main__':
    app.run(debug=False,host='0.0.0.0')

stream.py in resources directory

from flask import Response, request, stream_with_context
from flask_restful import Resource

class Stream(Resource):
    def get(self):
        def generator():
            yield '{"data": ['
            #creating large number of entries for data array with yield
            yield ']}'
        resp = Response(stream_with_context(generator()), status=200, content_type='application/json')
        return resp     

I started the flask app with python3.9 api.py

I am able to get response when I hit url http://127.0.0.1:5000/stream but in network tab I can see some issues:

1. If the response was streamed it should not have content-length
2. The streamed response should not be in Waiting for server response state, somehow its waiting to finish whole response and then starts downloading.

And below is the output that I am trying to achieve. A streamed output which would start Content Downloading and not be stuck in Waiting for server response

Answer 1

I found the solution for the problem I faced. I was using flask_compress which was causing this issue. Removing it would stream the response as expected. Thank you for the help though.