HTTP协议
所有的Web应用本质上就是一个socket服务端，而用户的浏览器就是一个socket客户端，基于请求做出响应，客户都先请求，服务端做出对应的响应，按照http协议的请求协议发送请求，服务端按照http协议的响应协议来响应请求，这样的网络通信，我们就可以自己实现Web框架了。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="css.css">
<link rel="icon" href="favicon.ico">
</head>
<body>
<h1>欢迎来到红浪漫,拖鞋手牌请拿好,楼上请,男宾三位</h1>
<img src="tupian.jpg" alt="">
</body>
<script src="js.js"></script>
</html>
html代码
html代码
h1{
background-color: red;
color: white;
}
css代码
alert("楼下说滴对");
js代码
要想将服务器的html代码放在浏览器上,我们必须遵循http协议：
get的请求数据拼接在url中；
post的请求数据在请求体中；
web框架初识
每引入一个css或js或图片都需要向服务器请求一次拿到文件：
img js css 统称为静态文件
D:\python3\python.exe D:/PycharmProjects/s20/Django/day01/一框架.py GET / HTTP/1.1 Host: 127.0.0.1:9000 Connection: keep-alive Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3 Accept-Encoding: gzip, deflate, br Accept-Language: zh-CN,zh;q=0.9 GET /css.css HTTP/1.1 Host: 127.0.0.1:9000 Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36 Accept: text/css,*/*;q=0.1 Referer: http://127.0.0.1:9000/ Accept-Encoding: gzip, deflate, br Accept-Language: zh-CN,zh;q=0.9 GET /tupian.jpg HTTP/1.1 Host: 127.0.0.1:9000 Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36 Accept: image/webp,image/apng,image/*,*/*;q=0.8 Referer: http://127.0.0.1:9000/ Accept-Encoding: gzip, deflate, br Accept-Language: zh-CN,zh;q=0.9 GET /js.js HTTP/1.1 Host: 127.0.0.1:9000 Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36 Accept: */* Referer: http://127.0.0.1:9000/ Accept-Encoding: gzip, deflate, br Accept-Language: zh-CN,zh;q=0.9 客户端向浏览器发送的请求文件
客户端向浏览器发送的请求文件
框架演示：
# -*- coding: utf-8 -*-
# @Time : 2019/5/15 15:18
import re
import socket
from threading import Thread
sk = socket.socket()
sk.bind(("127.0.0.1",9000))
sk.listen()
def send_file(conn):
msg = conn.recv(1024).decode(‘utf-8‘)
conn.send(b"HTTP/1.1 200 ok \r\n\r\n")
t = re.findall(".*? (/.*?) HTTP/1.1",msg)
# print(t) # 获取客户端请求的文件
if t[0]=="/": # GET / HTTP/1.1
with open("html.html", "rb") as f:
countent_html = f.read()
conn.send(countent_html)
conn.close()
elif t[0]=="/css.css": # GET /css.css HTTP/1.1
with open("css.css", "rb") as f:
countent_css = f.read()
conn.send(countent_css)
conn.close()
elif t[0]=="/tupian.jpg": # GET /tupian.jpg HTTP/1.1
with open("tupian.jpg", "rb") as f:
countent_jpg = f.read()
conn.send(countent_jpg)
conn.close()
elif t[0]=="/js.js": # GET /js.js HTTP/1.1
with open("js.js", "rb") as f:
countent_js = f.read()
conn.send(countent_js)
conn.close()
while True:
conn,addr = sk.accept()
# 开启多线程
t = Thread(target=send_file,args=(conn,))
t.start()
sk.close()
web框架二
web框架二
# -*- coding: utf-8 -*-
# @Time : 2019/5/15 15:18
import re
import socket
from threading import Thread
sk = socket.socket()
sk.bind(("127.0.0.1",9000))
sk.listen()
def html(conn):
conn.send(b"HTTP/1.1 200 ok \r\n\r\n")
with open("html.html", "rb") as f:
countent_html = f.read()
conn.send(countent_html)
conn.close()
def css(conn):
conn.send(b"HTTP/1.1 200 ok \r\n\r\n")
with open("css.css", "rb") as f:
countent_css = f.read()
conn.send(countent_css)
conn.close()
def js(conn):
conn.send(b"HTTP/1.1 200 ok \r\n\r\n")
with open("js.js", "rb") as f:
countent_js = f.read()
conn.send(countent_js)
conn.close()
def tupian(conn):
conn.send(b"HTTP/1.1 200 ok \r\n\r\n")
with open("tupian.jpg", "rb") as f:
countent_jpg = f.read()
conn.send(countent_jpg)
conn.close()
def img(conn):
conn.send(b"HTTP/1.1 200 ok \r\n\r\n")
with open("favicon.ico", "rb") as f:
countent_ico = f.read()
conn.send(countent_ico)
conn.close()
file = [
("/",html),
("/css.css",css),
("/js.js",js),
("/tupian.jpg",tupian),
("/favicon.ico",img),
]
def send_file(conn,path):
for i in file:
if i[0]==path:
Thread(target=i[1],args=(conn,)).start()
while True:
conn,addr = sk.accept()
msg = conn.recv(1024).decode("utf-8")
t = re.findall(".*? (/.*?) HTTP/1.1", msg)
send_file(conn,t[0])
web框架三
web框架三
# -*- coding: utf-8 -*-
# @Time : 2019/5/16 16:56
"""
wsgiref模块版web框架
"""
from wsgiref.simple_server import make_server
def index(environ):
with open("index.html","rb") as f:
content = f.read()
return [content]
def home(environ):
with open("home.html","rb") as f:
content = f.read()
return [content]
def log(environ):
with open("favicon.ico","rb") as f:
content = f.read()
return [content]
li = [
("/",index),
("/home",home),
("favicon.ico",log),
]
def app(environ, start_response):
# 封装响应信息
start_response(‘200 OK‘, [(‘Content-Type‘, ‘text/html‘), (‘k1‘, ‘v1‘)])
# environ 封装好的请求数据,字典的格式
path = environ["PATH_INFO"]
print(path)
for i in li:
if i[0] == path:
ret = i[1](environ)
return ret
# 绑定ip和端口,有人连接就调用app函数
httpp = make_server("127.0.0.1",9000,app)
# 开始监听http请求
httpp.serve_forever()
web框架四
web框架四
原文地址：https://www.cnblogs.com/youxiu123/p/11494620.html
时间： 2024-08-03 20:11:23