【醍醐灌顶】Python编写http-server

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01-返回固定页面的数据

import socket


def handle_client_request(n_socket, client_ip_port):
    # 5. 接收信息(请求报文)
    buf = n_socket.recv(4096)  # buf  是请求报文
    if buf:
        print(buf.decode())
        # 6. 发送信息(响应报文)
        # 6.1 响应行
        response_line = 'HTTP/1.1 200 OK\r\n'
        # 6.2 响应头
        response_header = 'Server:PY\r\nName:Py42\r\n'
        # 6.3 空行 \r\n
        # 6.4 响应体(具体的页面数据), 返回 index.html 的页面
        f = open('static/index.html', 'rb')  # 读取到是 bytes 类型
        data = f.read()
        f.close()
        # 合成响应体
        response = (response_line + response_header + '\r\n').encode() + data
        n_socket.send(response)
    else:
        print(f'{client_ip_port} 下线了....')
    # 7. 关闭连接
    n_socket.close()


if __name__ == '__main__':
    # 1. 创建 socket 对象
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 设置端口复用
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
    # 2. 绑定 IP 和端口
    server_socket.bind(("", 8989))
    # 3. 设置监听
    server_socket.listen(128)
    # 4. 阻塞等待客户端的链接
    while True:
        new_socket, ip_port = server_socket.accept()
        print(f'{ip_port} 连接了....')
        handle_client_request(new_socket, ip_port)

    server_socket.close()

02-返回指定也页面

import socket


def handle_client_request(n_socket, client_ip_port):
    # 5. 接收信息(请求报文)
    buf = n_socket.recv(4096)  # buf  是请求报文
    if buf:
        # print(buf.decode())
        buf = buf.decode()
        file_name = buf.split(' ', 2)[1]
        print(f'请求的资源为: {file_name}')
        if file_name == '/':
            file_name = '/index.html'
        # 6. 发送信息(响应报文)
        # 6.1 响应行
        response_line = 'HTTP/1.1 200 OK\r\n'
        # 6.2 响应头
        response_header = 'Server:PY\r\nName:Py42\r\n'
        # 6.3 空行 \r\n
        # 6.4 响应体(具体的页面数据), 返回 index.html 的页面
        f = open('static' + file_name, 'rb')  # 读取到是 bytes 类型
        data = f.read()
        f.close()
        # 合成响应体
        response = (response_line + response_header + '\r\n').encode() + data
        n_socket.send(response)
    else:
        print(f'{client_ip_port} 下线了....')
    # 7. 关闭连接
    n_socket.close()


if __name__ == '__main__':
    # 1. 创建 socket 对象
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 设置端口复用
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
    # 2. 绑定 IP 和端口
    server_socket.bind(("", 8989))
    # 3. 设置监听
    server_socket.listen(128)
    # 4. 阻塞等待客户端的链接
    while True:
        new_socket, ip_port = server_socket.accept()
        print(f'{ip_port} 连接了....')
        handle_client_request(new_socket, ip_port)

    server_socket.close()



03-处理不存在的页面请求

import socket


def handle_client_request(n_socket, client_ip_port):
    # 5. 接收信息(请求报文)
    buf = n_socket.recv(4096)  # buf  是请求报文
    if buf:
        # print(buf.decode())
        buf = buf.decode()
        file_name = buf.split(' ', 2)[1]
        print(f'请求的资源为: {file_name}')
        if file_name == '/':
            file_name = '/index.html'
        # 6. 发送信息(响应报文)
        # 6.1 响应行
        response_line = 'HTTP/1.1 200 OK\r\n'
        # 6.2 响应头
        response_header = 'Server:PY\r\nName:Py42\r\n'
        # 6.3 空行 \r\n
        # 6.4 响应体(具体的页面数据), 返回 index.html 的页面
        try:
            f = open('static' + file_name, 'rb')  # 读取到是 bytes 类型
            data = f.read()
            f.close()
        except FileNotFoundError:
            f = open('static/error.html', 'rb')
            data = f.read()
            f.close()
            response_line = 'HTTP/1.1 404 NOT FOUND\r\n'
        # 合成响应体
        response = (response_line + response_header + '\r\n').encode() + data
        n_socket.send(response)
    else:
        print(f'{client_ip_port} 下线了....')
    # 7. 关闭连接
    n_socket.close()


if __name__ == '__main__':
    # 1. 创建 socket 对象
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 设置端口复用
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
    # 2. 绑定 IP 和端口
    server_socket.bind(("", 8989))
    # 3. 设置监听
    server_socket.listen(128)
    # 4. 阻塞等待客户端的链接
    while True:
        new_socket, ip_port = server_socket.accept()
        print(f'{ip_port} 连接了....')
        handle_client_request(new_socket, ip_port)

    server_socket.close()

04-静态 web 服务器-多任务版

import socket
import threading


def handle_client_request(n_socket, client_ip_port):
    # 5. 接收信息(请求报文)
    buf = n_socket.recv(4096)  # buf  是请求报文
    if buf:
        # print(buf.decode())
        buf = buf.decode()
        file_name = buf.split(' ', 2)[1]
        print(f'请求的资源为: {file_name}')
        if file_name == '/':
            file_name = '/index.html'
        # 6. 发送信息(响应报文)
        # 6.1 响应行
        response_line = 'HTTP/1.1 200 OK\r\n'
        # 6.2 响应头
        response_header = 'Server:PY\r\nName:Py42\r\n'
        # 6.3 空行 \r\n
        # 6.4 响应体(具体的页面数据), 返回 index.html 的页面
        try:
            f = open('static' + file_name, 'rb')  # 读取到是 bytes 类型
            data = f.read()
            f.close()
        except FileNotFoundError:
            f = open('static/error.html', 'rb')
            data = f.read()
            f.close()
            response_line = 'HTTP/1.1 404 NOT FOUND\r\n'
        # 合成响应体
        response = (response_line + response_header + '\r\n').encode() + data
        n_socket.send(response)
    else:
        print(f'{client_ip_port} 下线了....')
    # 7. 关闭连接
    n_socket.close()


if __name__ == '__main__':
    # 1. 创建 socket 对象
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 设置端口复用
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
    # 2. 绑定 IP 和端口
    server_socket.bind(("", 8989))
    # 3. 设置监听
    server_socket.listen(128)
    # 4. 阻塞等待客户端的链接
    while True:
        new_socket, ip_port = server_socket.accept()
        print(f'{ip_port} 连接了....')
        sub_thread = threading.Thread(target=handle_client_request, args=(new_socket, ip_port))
        sub_thread.start()

    server_socket.close()




05-静态 web服务器-面向对象版

import socket
import threading


class HTTPWebServer(object):
    def __init__(self):
        self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server_socket.bind(('', 9090))
        self.server_socket.listen(128)

    def __del__(self):
        self.server_socket.close()

    def start(self):
        while True:
            new_socket, ip_port = self.server_socket.accept()
            print(f'{ip_port} 连接了.....')
            sub_thread = threading.Thread(target=self.handle_client_request, args=(new_socket, ip_port))
            sub_thread.start()

    @staticmethod
    def handle_client_request(n_socket, client_ip_port):
        # 接收请求报文
        buf = n_socket.recv(4096)
        if buf:
            buf = buf.decode()  # 转换为 str
            # 解析资源路径
            file_name = buf.split(' ', 2)[1]
            print(f"请求的资源未: {file_name}")
            if file_name == '/':
                file_name = '/index.html'
            # 6.1 响应行
            response_line = 'HTTP/1.1 200 OK\r\n'
            # 6.2 响应头
            response_header = 'Server:PY\r\nName:Py42\r\n'
            # 6.3 空行 \r\n
            # 6.4 响应体(具体的页面数据), 返回 index.html 的页面
            try:
                f = open('static' + file_name, 'rb')  # 读取到是 bytes 类型
                data = f.read()
                f.close()
            except FileNotFoundError:
                f = open('static/error.html', 'rb')
                data = f.read()
                f.close()
                response_line = 'HTTP/1.1 404 NOT FOUND\r\n'
            # 合成响应体
            response = (response_line + response_header + '\r\n').encode() + data
            n_socket.send(response)
        else:
            print(f"{client_ip_port} 关闭了")

        n_socket.close()


if __name__ == '__main__':
    # 1. 创建服务器对象
    web = HTTPWebServer()
    # 2. 启动服务器
    web.start()

06-python 获取终端命令的参数

"""
命令     参数    参数
python3 xxx.py  9898
需求: 获取参数
"""
import sys
# sys.argv  类型是列表:
print(sys.argv)

07-命令行指定端口启动

import socket
import threading
import sys


class HTTPWebServer(object):
    def __init__(self, port):
        self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
        self.server_socket.bind(('', port))
        self.server_socket.listen(128)

    def __del__(self):
        self.server_socket.close()

    def start(self):
        print('服务已启动,等待客户端连接....')
        while True:
            new_socket, ip_port = self.server_socket.accept()
            print(f'{ip_port} 连接了.....')
            sub_thread = threading.Thread(target=self.handle_client_request, args=(new_socket, ip_port))
            sub_thread.start()

    @staticmethod
    def handle_client_request(n_socket, client_ip_port):
        # 接收请求报文
        buf = n_socket.recv(4096)
        if buf:
            buf = buf.decode()  # 转换为 str
            # 解析资源路径
            file_name = buf.split(' ', 2)[1]
            print(f"请求的资源未: {file_name}")
            if file_name == '/':
                file_name = '/index.html'
            # 6.1 响应行
            response_line = 'HTTP/1.1 200 OK\r\n'
            # 6.2 响应头
            response_header = 'Server:PY\r\nName:Py42\r\n'
            # 6.3 空行 \r\n
            # 6.4 响应体(具体的页面数据), 返回 index.html 的页面
            try:
                f = open('static' + file_name, 'rb')  # 读取到是 bytes 类型
                data = f.read()
                f.close()
            except FileNotFoundError:
                f = open('static/error.html', 'rb')
                data = f.read()
                f.close()
                response_line = 'HTTP/1.1 404 NOT FOUND\r\n'
            # 合成响应体
            response = (response_line + response_header + '\r\n').encode() + data
            n_socket.send(response)
        else:
            print(f"{client_ip_port} 关闭了")

        n_socket.close()


if __name__ == '__main__':
    # print('使用方法: python xxx.py 端口号')
    # 获取命令行参数
    buf = sys.argv
    if len(buf) == 2:
        # 代表有两个参数
        port = int(buf[1])
    else:
        port = 8888
    print('使用的端口号是:', port)
    # 1. 创建服务器对象
    web = HTTPWebServer(port)
    # 2. 启动服务器
    web.start()

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