circuitpython/tests/net_inet/uasyncio_tcp_read_headers.py

# Test uasyncio.open_connection() and stream readline()

try:
    import uasyncio as asyncio
except ImportError:
    try:
        import asyncio
    except ImportError:
        print("SKIP")
        raise SystemExit


async def http_get_headers(url):
    reader, writer = await asyncio.open_connection(url, 80)

    print("write GET")
    writer.write(b"GET / HTTP/1.0\r\n\r\n")
    await writer.drain()

    while True:
        line = await reader.readline()
        line = line.strip()
        if not line:
            break
        if (
            line.find(b"Date") == -1
            and line.find(b"Modified") == -1
            and line.find(b"Server") == -1
        ):
            print(line)

    print("close")
    writer.close()
    await writer.wait_closed()
    print("done")


asyncio.run(http_get_headers("micropython.org"))