模拟web服务器

import socket
import re
import gevent
from gevent import monkey
monkey.patch_all()

class HttpServer(object):
    def __init__(self):
        server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        server_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
        server_socket.bind(('',80))
        server_socket.listen(128)
        self.server_socket = server_socket

    def client_handler(self,client_socket):
        client_data = client_socket.recv(1024)
        print(client_data.decode())
        request_path = re.match("GET\s(?P<path>\S+)",client_data.decode())
        if request_path :
            path = request_path.group('path')
            print("客户端请求的路径：" + path)
            try:
                response_line = "HTTP/1.1 200 OK\r\n"
                response_header = "Server: PWS 1.0\r\nContent-Type: text/html;charset=utf8\r\n"
                if path == "/":
                    path = "/index.html"
                with open("./html" + path, "rb") as f:
                    response_content = f.read()
                response_data = (response_line + response_header + "\r\n").encode() + response_content
            except Exception as e:
                response_line = "HTTP/1.1 404\r\n"
                response_header = "Server: PWS 1.0\r\nContent-Type: text/html;charset=utf8\r\n"
                response_content = "你访问的资源不存在"
                response_data = (response_line + response_header + "\r\n" + response_content).encode()
            finally:
                client_socket.send(response_data)
                client_socket.close()
        else:
            response_line = "HTTP/1.1 403 \r\n"
            response_header = "Server: PWS 1.0\r\nContent-Type: text/html;\r\n"
            response_content = "<h1>路径错误</h1>\r\n"
            response_data = (response_line + response_header + "\r\n" + response_content).encode()
            print("客户端请求的路径错误")
            client_socket.send(response_data)
            client_socket.close()


    def start(self):
        while 1:
            client_socket,client_adder = self.server_socket.accept()
            print("接收到一个来自%s的请求"%str(client_adder))
            gevent.spawn(self.client_handler, client_socket )
            #self.client_handler(client_socket)



def main():
    http_server = HttpServer()
    http_server.start()

if __name__ == "__main__":
    main()