Python:epoll单线程实现HTTP服务端

Python里效率最高的服务端,因为借用了系统级的优先权.

严格来说不算是单线程了,借用了系统的线程,让系统去监控client_socket,但程序本身只有一个线程,所以也可以叫单线程.

如果在windows运行包含epoll模块的Python代码时遇到异常是正常的.

epoll只能在Linux使用,我也不清楚为啥windows下的Python标准库会有epoll类.

我把注释去掉,如果有需要注释,我可以把注释版放上来

import socket,re,time,select


def open_file(路径):
    try:
        client_html_data=open('python_demo/HTTP协议/'+路径,'rb')
    except Exception as  ret:    
        return '404错误 页面不存在,请重新输入地址'.encode('gbk')
    else:  
        html_read_data=client_html_data.read()
        client_html_data.close()
        return html_read_data


def service_client(client_socket,recv_data):
    print('客户端发送的请求内容:')
    print('-'*50)
    print(recv_data)
    print('-'*50)
    ret_filename_=re.search(r'\w+\.html|favicon.ico',recv_data)  
    if ret_filename_:  
        file_name=ret_filename_.group()
        file_data=open_file(file_name)  
        html_header='HTTP/1.1 200 OK\r\n'    
        html_header+='Content-length:%d\r\n\r\n'%len(file_data)  
        client_socket.send(html_header.encode('gbk'))
        client_socket.send(file_data)  
    else:  
        file_data=open_file('index.html')    
        html_header='HTTP/1.1 200 OK\r\n'    
        html_header+='Content-length:%d\r\n\r\n'%len(file_data)  
        client_socket.send(html_header.encode('gbk'))
        client_socket.send(file_data)  


def main():
    tcp_socket_sever=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    tcp_socket_sever.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)       
    tcp_socket_sever.bind(('127.0.0.1',8001))
    tcp_socket_sever.listen(128)
    tcp_socket_sever.setblocking(False)  
    print('服务端已运行---------------------------------------')
    epl=select.epoll()
    epl.register(tcp_socket_sever.fileno(),select.EPOLLIN)  
    client_socket_list=list()
    fd_event_dict=dict()
    while True:
        fd_event_list=epl.poll()
        for fd,event in fd_event_list:
            if fd == tcp_socket_sever.fileno():  
                client_socket,client_addr=tcp_socket_sever.accept()
                epl.register(client_socket.fileno(),select.EPOLLIN)
                fd_event_dict[client_socket.fileno()]=client_socket
            elif event==select.EPOLLIN:
                recv_data=fd_event_dict[fd].recv(10240).decode('gbk')
                if recv_data :  
                    service_client(fd_event_dict[fd],recv_data)  
                else:  
                    fd_event_dict[fd].close()
                    del fd_event_dict[fd]
                    epl.unregister(fd)
    tcp_socket_sever.close()  


if __name__ == '__main__':
    main()