單程序-單線程-長連接配接實作http伺服器-輪詢

#coding=utf-8
import socket
import  re
import threading
import multiprocessing
import gevent
from gevent import  monkey
monkey.patch_all()  # 遇到阻塞自動切換協程，程式啟動時執行monkey.patch_all()解決


def service_client(new_socket, request):
    '''為這個用戶端傳回資料'''

    # 1. 接收浏覽器發過來的請求，即http請求
    # GET / HTTP/1.1
    # ...
    # request = new_socket.recv(1024).decode('UTF-8') # 解碼
    #print('>>>'*40)
    #print(request)
    request_lines = request.splitlines()  # 轉換成清單
    print('')
    print('>'*30)
    print(request_lines)

    # GET /index.html HTTP/1.1
    # get post put del
    ret = re.match(r'[^/]+(/[^ ]*)', request_lines[0])
    if ret:
        file_name = ret.group(1)
        print('*'*50, file_name)
        if file_name == '/':
            file_name = '/index.html'
    # 2. 傳回http格式的資料給浏覽器

    try:
        f = open('./html' + file_name, 'rb')

    except:
        response = 'HTTP/1.1 404 NOT FOUND\r\n'
        response += '\r\n'
        response += '----file not find----'
        new_socket.send(response.encode('utf-8'))

    else:
        html_content = f.read()
        f.close()
        # 2.1 準備發送給浏覽器的資料 -- header,body

        response_body = html_content
        response_header = 'HTTP/1.1 200 OK\r\n'
        response_header += 'Content-Length:%d\r\n' % len(response_body)
        response_header += '\r\n'  # 空行

        response = response_header.encode('utf-8') + response_body

        # 2.2 将response header + body 發送給浏覽器
        new_socket.send(response)


    # 關閉套接字
    # new_socket.close()


def main():
    '''整體控制'''
    # 1. 建立套接字
    tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    tcp_server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    tcp_server_socket.setblocking(False)  # 設定套接字為非堵塞

    # 2. 綁定本地資訊
    tcp_server_socket.bind(('', 7890))

    # 3. 開啟監聽
    tcp_server_socket.listen(128)
    tcp_server_socket.setblocking(False)  # 将套接字變為非堵塞

    client_socket_list = list()
    while True:
        # 4. 等待新用戶端的連接配接
        try:
            new_socket, client_addr = tcp_server_socket.accept()
        except Exception as ret:
            pass
        else:
            new_socket.setblocking(False) # 新套接字變為非堵塞
            client_socket_list.append(new_socket)

        for new_socket in client_socket_list:
            try:
                recv_data = new_socket.recv(1024).decode('utf-8')
            except Exception as ret:
                pass
            else:
                if recv_data:
                    service_client(new_socket, recv_data)
                else:
                    new_socket.close()
                    client_socket_list.remove(new_socket)

    # 關閉監聽套接字
    tcp_server_socket.close()

if __name__ == '__main__':
    main()