CODEWITHSUNDEEP
pythonpython-3.xsocketsesp8266micropython
0x1773
0x1773

Reputation: 9

don't want to wait for socket.accept() each loop iteration

I'm using the line "conn, addr = httpSocket.accept()", but I don't want to wait for it every iteration of my loop because there won't always be someone trying to connect. Is there a way to check if anyone is trying to connect, and move on if there isn't?

I have looked at using asyncio (I can't use threads because this is micropython on an esp8266, and threading is not supported) but my line is not awaitable.

with open('page.html', 'r') as file:
    html = file.read()

while True:
    conn, addr = httpSocket.accept()
    print('Got a connection from %s' % str(addr))
    conn.send('HTTP/1.1 200 OK\n')
    conn.send('Content-Type: text/html\n')
    conn.sendall(html)
    conn.close()

Upvotes: 0

Views: 319

Answers (1)

Amit
Amit

Reputation: 21

If threads isn't an option you can always use the select module. With select you basically split your sockets into 3 categories:

  1. Sockets that you want to read data from them (including new connections).

  2. Sockets that you want to send them data.

  3. Exceptional sockets ( usually for error checking).

And with each iteration select returns to you lists of sockets by these categories, so you know how to handle each one instead of waiting for a new connection each time.

You can see an example here: https://steelkiwi.com/blog/working-tcp-sockets/

Upvotes: 1

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