Micropython u异步服务器

Question

我需要在ESP32上运行websocket服务器，当我从任何客户端连接时，官方例子会引发以下异常：

MPY: soft reboot
Network config: ('192.168.0.200', '255.255.255.0', '192.168.0.1', '8.8.8.8')
b'Sec-WebSocket-Version: 13\r\n'
b'Sec-WebSocket-Key: k5Lr79cZgBQg7irI247FMw==\r\n'
b'Connection: Upgrade\r\n'
b'Upgrade: websocket\r\n'
b'Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n'
b'Host: 192.168.0.200\r\n'
b'\r\n'
Finished webrepl handshake
Task exception wasn't retrieved
future: <Task> coro= <generator object 'echo' at 3ffe79b0>
Traceback (most recent call last):
  File "uasyncio/core.py", line 1, in run_until_complete
  File "main.py", line 22, in echo
  File "uasyncio/websocket/server.py", line 60, in WSReader
AttributeError: 'Stream' object has no attribute 'ios'

我的micropython固件和库：

• Micropython固件：https://micropython.org/resources/firmware/esp32-idf3-20200902-v1.13.bin
• 已安装的Pip库:micropython，uasyncio.websocket.server

我的main.py

import network
import machine

sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.ifconfig(('192.168.0.200', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
if not sta_if.isconnected():
    print('connecting to network...')
    sta_if.connect('my-ssid', 'my-password')
    while not sta_if.isconnected():
        machine.idle() # save power while waiting
print('Network config:', sta_if.ifconfig())

# from https://github.com/micropython/micropython-lib/blob/master/uasyncio.websocket.server/example_websock.py
import uasyncio
from uasyncio.websocket.server import WSReader, WSWriter

def echo(reader, writer):
    # Consume GET line
    yield from reader.readline()

    reader = yield from WSReader(reader, writer)
    writer = WSWriter(reader, writer)

    while 1:
        l = yield from reader.read(256)
        print(l)
        if l == b"\r":
            await writer.awrite(b"\r\n")
        else:
            await writer.awrite(l)


import ulogging as logging
#logging.basicConfig(level=logging.INFO)
logging.basicConfig(level=logging.DEBUG)
loop = uasyncio.get_event_loop()
loop.create_task(uasyncio.start_server(echo, "0.0.0.0", 80))
loop.run_forever()
loop.close()

Answer 1

MicroPython 1.13实现了异步v3，与所引用的3年前的样例相比，异步v3有许多破坏性的更改。

我建议你参考彼得·希奇的优秀异步文档和异步V3教程

Answer 2

我也遇到了同样的问题。我看了一下Stream 1和新的2的旧实现，在我看来，您需要从u异步from /websocket/编辑server.py。你可以从3下载文件到你的电脑。然后在文件的底部将"reader.ios“的两个实例替换为"reader.s”。将文件保存到您的ESP32中，它应该可以工作。当然，您需要使用"from server import WSReader，WSWriter“而不是"from uasyncio.websocket.server import WSReader，WSWriter”。

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Answer 3

https://github.com/pfalcon/pycopy-lib/tree/master/uasyncio最近有一个示例(5月21日)，它也应该在标准MicroPython上工作。

或在web服务器下签出https://awesome-micropython.com。