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# main.py
import asyncio
import logging
from starlette.applications import Starlette
from starlette.requests import Request
from starlette.responses import JSONResponse
from starlette.routing import Route
from sse_starlette import EventSourceResponse
_log = logging.getLogger(__name__)
async def endless(req: Request):
"""Simulates an endless stream, events sent every 0.3 seconds"""
async def event_publisher():
i = 0
try:
while True: # i <= 20:
# yield dict(id=..., event=..., data=...)
i += 1
# print(f"Sending {i}")
yield dict(data=i)
await asyncio.sleep(0.3)
except asyncio.CancelledError as e:
_log.info(
f"Disconnected from client (via refresh/close) {req.client} after {i} events"
)
# Do any other cleanup, if any
raise e
return EventSourceResponse(event_publisher())
async def healthcheck(req: Request):
return JSONResponse({"status": "ok"})
app = Starlette(
routes=[
Route("/endless", endpoint=endless),
Route("/health", endpoint=healthcheck),
],
)
if __name__ == "__main__":
import uvicorn
uvicorn.run(app, host="localhost", port=8001, log_level="trace")
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