1、显示固定的页面

from socket import *
from multiprocessing import *
import os


def handleClient(clientSocket):
    #用一个新的进程，为一个客户端进行服务
    data = clientSocket.recv(1024).decode('utf-8')
    print(data)

    responseHeaderLines = "HTTP/1.1 200 OK"+os.linesep
    responseHeaderLines += "k1:v1"+os.linesep
    responseHeaderLines += "k2:v2" + os.linesep
    responseHeaderLines += os.linesep
    responseBody = "hello <h1>老王八</h1>"
    response = responseHeaderLines + responseBody

    clientSocket.send(response.encode('utf-8'))
    clientSocket.close()


if __name__ == '__main__':
    #作为程序的主控制入口
    serverSocket = socket(AF_INET, SOCK_STREAM)
    serverSocket.bind(("", 82))
    serverSocket.listen()
    while True:
        print('服务端等待客户端连接......')
        clientSocket, clientAddr = serverSocket.accept()
        Process(target=handleClient, args=(clientSocket,)).start()
        print('%s-%s 连接成功......' % (clientAddr[0], clientAddr[1]))

2、显示需要的页面

from socket import *
from multiprocessing import *
import os

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"


def handleClient(clientSocket):
    data = clientSocket.recv(1024)
    data = data.decode('utf-8')
    """解析请求报文"""
    # 提取用户请求的文件名,如果是get请求携带参数要处理？
    file_name = data.splitlines()[0].split(' ')[1]

    #如果是/一般表示请求首页
    if "/" == file_name:
        file_name = "/index.html"

    # 打开文件，读取内容
    try:
        #模拟一个运行中的异常
        #num=1/0
        with open(HTML_ROOT_DIR + file_name, "rb") as file:
            file_data = file.read()
        # 构造响应数据
        response_start_line = "HTTP/1.1 200 OK"+os.linesep
        response_headers = "Server: My server"+os.linesep
        response_body = file_data.decode("utf-8")
    except FileNotFoundError:
        response_start_line = "HTTP/1.1 404 Not Found"+os.linesep
        response_headers = "Server: My server"+os.linesep
        with open(HTML_ROOT_DIR + '/404.html', "r",encoding='utf-8') as file:
            response_body = file.read()
    except:
        response_start_line = "HTTP/1.1 500 ERROR" + os.linesep
        response_headers = "Server: My server" + os.linesep
        with open(HTML_ROOT_DIR + '/error.html', "r",encoding='utf-8') as file:
            response_body = file.read()

    response_headers += "Content-Type:text/html;charset=utf-8" + os.linesep

    response = response_start_line + response_headers + os.linesep + response_body
    #print("response data:", response)

    # 向客户端返回响应数据
    clientSocket.send(response.encode('utf-8'))
    # 关闭客户端连接
    clientSocket.close()


if __name__ == '__main__':
    """作为程序的主控制入口"""
    serverSocket = socket(AF_INET, SOCK_STREAM)
    serverSocket.bind(("", 6788))
    serverSocket.listen()
    while True:
        print('服务端等待客户端连接......')
        clientSocket, clientAddr = serverSocket.accept()
        Process(target=handleClient, args=(clientSocket,)).start()
        print('%s-%s 连接成功......' % (clientAddr[0], clientAddr[1]))

3、符合面向对象思想设计类实现

from socket import *
from multiprocessing import *
import os

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"



class MyHttpServer(object):
    """服务器类"""
    def __init__(self):
        """初始化,创建了一个TCP服务端对象"""
        self.server_socket = socket(AF_INET, SOCK_STREAM)

    def bind(self, port=5678):
        """绑定端口号"""
        self.server_socket.bind(("", port))

    def start(self):
        """开始监听"""
        self.server_socket.listen()
        while True:
            client_socket, client_address = self.server_socket.accept()
            print("[%s, %s]用户连接上了" % client_address)
            Process(target=self.handle_client, args=(client_socket,)).start()

    def handle_client(self,client_socket):
        """处理客户端的请求"""
        data = client_socket.recv(1024)
        data = data.decode('utf-8')
        """解析请求报文"""
        # 提取用户请求的文件名,如果是get请求携带参数要处理？
        file_name = data.splitlines()[0].split(' ')[1]

        # 如果是/一般表示请求首页
        if "/" == file_name:
            file_name = "/index.html"

        # 打开文件，读取内容
        try:
            # 模拟一个运行中的异常
            # num=1/0
            with open(HTML_ROOT_DIR + file_name, "rb") as file:
                file_data = file.read()
            # 构造响应数据
            response_start_line = "HTTP/1.1 200 OK" + os.linesep
            response_headers = "Server: My server" + os.linesep
            response_body = file_data.decode("utf-8")
        except FileNotFoundError:
            response_start_line = "HTTP/1.1 404 Not Found" + os.linesep
            response_headers = "Server: My server" + os.linesep
            with open(HTML_ROOT_DIR + '/404.html', "r", encoding='utf-8') as file:
                response_body = file.read()
        except:
            response_start_line = "HTTP/1.1 500 ERROR" + os.linesep
            response_headers = "Server: My server" + os.linesep
            with open(HTML_ROOT_DIR + '/error.html', "r", encoding='utf-8') as file:
                response_body = file.read()

        response_headers += "Content-Type:text/html;charset=utf-8" + os.linesep

        response = response_start_line + response_headers + os.linesep + response_body
        # print("response data:", response)


        client_socket.send(response.encode('utf-8'))
        client_socket.close()



if __name__ == '__main__':
    myHttpServer = MyHttpServer()
    myHttpServer.bind()
    myHttpServer.start()

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