heart_control/web_server.py

from    _thread     import stack_size
import uasyncio
import gc
import micropython
from mywifi import wifi_do_work, my_wifi
from MicroWebSrv.microWebSrv import MicroWebSrv
from http_handler import routeHandlers

'''
` 实例化web服务器对象
` bindIP='192.168.31.123' 必填。在WiFi已经连接路由器的情况下，填写esp32的ip地址
` 这个脚本同时支持 Python3.10 代码，测试时填上电脑本机IP地址即可
` routeHandlers 这是web网页的路由表
  - 当浏览器访问 192.168.31.123/test 时，会调用 _httpHandlerTestGet 函数
  - 当浏览器点击 summit 时，
    - 如 _httpHandlerTestGet 函数中 content 的 html 内容 method="post" 所显示的那样：<form action="/test" method="post" accept-charset="ISO-8859-1">
    - 该语句会以 POST 方式请求服务器
	- 再经过 routeHandlers 路由到 _httpHandlerTestPost 回调函数，输出函数内 content 的结果返回给浏览器
` 浏览器直接输入： 192.168.43.67 会出现 index.html 页面（前提是 webPath='MicroWebSrv/www/' 路径设置正常）
  - index.html 文件在哪路由？
    - 在 MicroWebSrv\microWebSrv.py 文件中，初始化提到：_indexPages，函数 _physPathFromURLPath 调用相关页面
	- 理论上这是作者源文件里面的东西，我们可以不用管它，也无法从外部修改，直接使用 WriteResponseFile 函数返回网页文件即可
	- `httpResponse.WriteResponseFile(filepath= '/my-html.html',contentType	 = "text/html",headers		 = None)`
'''
class MyWebSrv():
    _instance = None
    def __new__(cls, *args, **kwargs):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
        return cls._instance   # 返回的是内存地址
    def __init__(self, ip='', webp = '/MicroWebSrv/view') -> None:
        self.ip = ip
        self.web_path = webp
        self.srv = None

    def start_server(self, threaded=True):
        # import sys
        # if sys.platform == 'win32':
        #     ip_addr = '192.168.43.240'
        #     web_path = 'MicroWebSrv\web_files'
        # else:
        #     from mywifi import my_wifi
        #     while not my_wifi.wlan.isconnected():
        #         pass
        #     ip_addr = my_wifi.get_wifi_addr()
        #     web_path = '/MicroWebSrv/web_files'
        # print(self.web_path)
        # stack_size 必须设置大小，如果不设置当访问网页程序会抛出超出堆栈的异常
        stack_size(32768)
        self.srv = MicroWebSrv(routeHandlers=routeHandlers, bindIP=self.ip, webPath=self.web_path)
        self.srv.Start(threaded=True)
        print("start:", self.ip)


web_srv = MyWebSrv()

async def start_server():
    uasyncio.create_task(wifi_do_work())
    while not my_wifi.wlan.isconnected():
        await uasyncio.sleep_ms(100)
        # print('wait to wifi connect...')

    web_srv.ip = my_wifi.get_wifi_addr()
    web_srv.start_server()
    
    while True:
        gc.collect()
        # print(micropython.mem_info())
        await uasyncio.sleep_ms(10000)


if __name__ == '__main__':
	uasyncio.run(start_server())
    # WebSrv()

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