Long polling is old and awkward technology from the turn of the century. I
recommend using web sockets instead:
[https://github.com/treeform/ws](https://github.com/treeform/ws)
I think this fixes the issues you had:
import asynchttpserver, asyncdispatch
var server = newAsyncHttpServer()
var requests: seq[Request]
proc returnAll() {.async.} =
for req in requests:
await req.respond(Http200, "Hello World\n")
requests.setLen(0)
proc cb(req: Request) {.async, gcsafe.} =
echo req.url.path
requests.add(req)
if req.url.path == "/shouldReturn":
await returnAll()
waitFor server.serve(Port(8080), cb)
Run
When I just open [http://localhost:8080](http://localhost:8080)/ in my browser
it hangs, but when I open
[http://localhost:8080/shouldReturn](http://localhost:8080/shouldReturn) they
all return at once.
