code_9003.py

import time
import gc
import os
import ssl
from adafruit_wiznet5k.adafruit_wiznet5k import WIZNET5K
import adafruit_connection_manager
from digitalio import DigitalInOut
import board
import busio

cs = DigitalInOut(board.W5500_CS)
reset = DigitalInOut(board.W5500_RST)

spi_bus = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)

# Initialize ethernet interface with DHCP
radio = WIZNET5K(spi_bus, cs, reset=reset)

# Initialize a requests session
pool = adafruit_connection_manager.get_radio_socketpool(radio)

HOST = ""  # see below
PORT = 443
BACKLOG = 2
MAXBUF = 256

def resp(body):
    r  = b"HTTP/1.1 200 OK\r\n"
    r += b"Content-Length: {}\r\n".format(len(body))
    r += b"\r\n"
    r += body
    return r

#time.sleep(3)  # wait for serial

HOST = str(radio.pretty_ip(radio.ip_address))

print("Create TCP Server socket", (HOST, PORT))
s = pool.socket(pool.AF_INET, pool.SOCK_STREAM)
ssl_context = ssl.create_default_context()
ssl_context.load_verify_locations(cadata="")
ssl_context.load_cert_chain("cert.pem", "key.pem")
ss = ssl_context.wrap_socket(s, server_side=True)
ss.bind((HOST, PORT))
ss.listen(BACKLOG)
print("Listening\n")

buf = bytearray(MAXBUF)
while True:
    print(f"Accepting connections (mem={gc.mem_free()})")
    conn, addr = ss.accept()
    print("Accepted from", addr)
    try:
        conn.settimeout(None)
        size = conn.recv_into(buf, MAXBUF)
        print("Received", buf[:size], size, "bytes")

        conn.send(resp(b"nano-https-server"))
        print(f"Sent response (mem={gc.mem_free()})\n")

    finally:
        conn.close()