Django回顾【一】_代码007(未授权)

本文介绍: Web应用程序是一种可以通过Web访问的应用程序，程序的最大好处是用户很容易访问应用程序，用户只需要有浏览器即可，不需要再安装其他软件。应用程序有两种模式C/S、B/S。C/S：客户端服务端例如MySQL C和S均装在同一台机器上B/S：浏览器服务端例如：Django运行后——》服务端。

Web应用程序是一种可以通过Web访问的应用程序，程序的最大好处是用户很容易访问应用程序，用户只需要有浏览器即可，不需要再安装其他软件。应用程序有两种模式C/S、B/S。

C/S：客户端<—–>服务端例如MySQL C和S均装在同一台机器上

B/S：浏览器<—–>服务端例如：Django运行后——》服务端

注：

import socket

def server_run():
    soc = socket.socket()
    soc.bind(('127.0.0.1', 8008))
    soc.listen(5)
    while True:
        conn, addr = soc.accept()
        recv_data = conn.recv(1024)
        print(recv_data)
        # 1 直接在send里写，发送给客户端
        # conn.send(b'HTTP/1.1 200 OKrnrn<h1>hello web</h1><img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fsafe-img.xhscdn.com%2Fbw1%2Fbba4f396-c3d4-4701-8ee3-bdab4cb3feba%3FimageView2%2F2%2Fw%2F1080%2Fformat%2Fjpg&refer=http%3A%2F%2Fsafe-img.xhscdn.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1703680132&t=35bd520feddfa57cc22dd58acb1016e4"></img>')
        #2 打开一个html文件，发送给客户端
        # with open('index.html','r',encoding='utf-8') as f:
        #     data=f.read()
        # conn.send(('HTTP/1.1 200 OKrnrn%s'%data).encode('utf-8'))
        # 3 动态网页，字符串替换
        import time
        now=time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
        print(now)
        with open('index.html','r',encoding='utf-8') as f:
            data=f.read()
        data=data.replace('@@@',now)
        conn.send(('HTTP/1.1 200 OKrnrn%s'%data).encode('utf-8'))
        conn.close()

if __name__ == '__main__':
    server_run()

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h2>@@@</h2>

<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fsafe-img.xhscdn.com%2Fbw1%2Fbba4f396-c3d4-4701-8ee3-bdab4cb3feba%3FimageView2%2F2%2Fw%2F1080%2Fformat%2Fjpg&refer=http%3A%2F%2Fsafe-img.xhscdn.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1703680132&t=35bd520feddfa57cc22dd58acb1016e4" alt="">
</body>
</html>

HTTP协议是Hyper Text Transfer Protocol（超文本传输协议）

是用于服务器与本地浏览器之间传输超文本的传送协议。

##### GET请求##### ##### 
'''
########### 请求首行####################
GET / HTTP/1.1rn
# get请求后面的参数
GET /?name=lqz&age=18 HTTP/1.1rn
##################### 请求头####################
Host: 127.0.0.1:8008rn
Connection: keep-alivern
Cache-Control: max-age=0rn
Upgrade-Insecure-Requests: 1rn
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36rn
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8rnAccept-Encoding: gzip, deflate, brrn
Accept-Language: zh-CN,zh;q=0.9rn
Cookie: csrftoken=7xx6BxQDJ6KB0PM7qS8uTA892ACtooNbnnF4LDwlYk1Y7S7nTS81FBqwruizHsxFrnrn'
################ 请求体####################
（get请求，请求体为空）    
'''

##### POST请求##### ##### 
'''

################请求首行################
POST /?name=lqz&age=18 HTTP/1.1rn
################请求头################
Host: 127.0.0.1:8008rn
Connection: keep-alivern
Content-Length: 21rn
Cache-Control: max-age=0rn
Origin: http://127.0.0.1:8008rn
Upgrade-Insecure-Requests: 1rn
Content-Type: application/x-www-form-urlencodedrn
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36rn
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8rn
Referer: http://127.0.0.1:8008/?name=lqz&age=18rn
Accept-Encoding: gzip, deflate, brrnAccept-Language: zh-CN,zh;q=0.9rn
Cookie: csrftoken=7xx6BxQDJ6KB0PM7qS8uTA892ACtooNbnnF4LDwlYk1Y7S7nTS81FBqwruizHsxFrnrn

################请求体################
name=lqz&password=123'
'''

# 响应首行
HTTP/1.1 200 OK
# 响应头
Date: Thu, 19 Sep 2019 08:08:27 GMT
Server: WSGIServer/0.2 CPython/3.7.3
Content-Type: application/json
Content-Length: 37
X-Frame-Options: SAMEORIGIN
Vary: Cookie

# 响应体
{"ret": 0, "retlist": [], "total": 0}

状态码	状态英文名称	中文描述
200	OK	请求成功。一般用于 GET 与 POST 请求
201	Created	已创建。成功请求并创建了新的资源，通常用于 POST 或 PUT 请求