一个最基础的socket实现web服务示例_用socket做web-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_46415443/article/details/124380399

单进程单线程最基础的socket web服务实现原理

#coding : uft-8

import socket
# ------------------------------------到这里做了一个响应头 + 响应体body-----------------------------------
EOL1 = b'\n\n'          #转换为字节
EOL2 = b'\n\r\n'
body = '''Hello, world! <h1> from the5fire </h1>'''
response_params = [         #响应，一个字符串列表
    'HTTP/1.0 200 OK',      #状态200
    'Date: sun, 27 may 2018 01:01:01 GMT',  #日期
    'Content-Type: text/html; charset=utf-8',  #响应类型text utf-8文本
    'Content-Length: {}\r\n'.format(len(body.encode())),    #响应长度 .encode()以字节编码 len()长度 .format格式化len到的数字为字符串并传入{}
    body,
]

response = '\r\n'.join(response_params) #以\r\n为连接将response_params列表元素转换为一个有格式的整体字符串

# -------------------------------------------------------接收请求，发送响应-----------------------------------


def handle_connection(conn,addr):
    request = b""
    while EOL1 not in request and EOL2 not in request:
        request += conn.recv(1024)
    conn.send(response.encode())            #把响应格式化之后发送给客户端
    print(request)  #b'GET / HTTP/1.1\r\nHost: 127.0.0.1:8000\r\nConnection: keep-alive\r\nsec-ch-ua: " Not A;Brand";v="99", "Chromium";v="100", "Microsoft Edge";v="100"\r\nsec-ch-ua-mobile: ?0\r\nsec-ch-ua-platform: "Windows"\r\nUpgrade-Insecure-Requests: 1\r\nUser-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36 Edg/100.0.1185.50\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9\r\nSec-Fetch-Site: none\r\nSec-Fetch-Mode: navigate\r\nSec-Fetch-User: ?1\r\nSec-Fetch-Dest: document\r\nAccept-Encoding: gzip, deflate, br\r\nAccept-Language: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6\r\nCookie: csrftoken=UNm1axaivMGs7ikC8YtX4SDOugU7lEyzFzpbecAUUCr3AyWRWqptEsPaIORFOvDm; sessionid=a20zdu52yvrhlezhelijneb2dus84llo\r\n\r\n'
    print(response.encode())#b'HTTP/1.0 200 OK\r\nDate: sun, 27 may 2018 01:01:01 GMT\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 38\r\n\r\nHello, world! <h1> from the5fire </h1>'
    conn.close()        #关闭连接


# -----------------------------------设置服务器ip端口，监听连接，转发请求去handle_connection------------------------
def main():
    serversocket = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #创建socket连接 AF_INET=IPv4 SOCK_STREAM=TCP传输协议
    serversocket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) #设置端口复用，快速重启
    serversocket.bind(('127.0.0.1',8000))   #设置访问IP和端口
    serversocket.listen(5)  #设置最大连接排队量
    print('http://127.0.0.1:8000')
    try:
        while True:
            conn, address = serversocket.accept()   #(<socket.socket fd=120, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 8000), raddr=('127.0.0.1', 55134)>, ('127.0.0.1', 55134))
            handle_connection(conn,address)
    finally:    #无论try是否抛出异常，一定执行
        serversocket.close()    #关闭连接

if __name__ == '__main__':
    main()