day55

吴超老师Django总网页：https://www.cnblogs.com/clschao/articles/10526431.html

请求（网址访问，提交数据等等） request

响应（回复页面，回复数据等等） response

web框架的本质及自定义web框架

我们可以这样理解：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。

　　通过对socket的学习，我们知道网络通信，我们完全可以自己写了，因为socket就是做网络通信用的，下面我们就基于socket来自己实现一个web框架，写一个web服务端，让浏览器来请求，并通过自己的服务端把页面返回给浏览器，浏览器渲染出我们想要的效果。在后面的学习中，****大家提前准备一些文件：

　　　　html文件内容如下，名称为test.html：　　

详情看：https://www.cnblogs.com/clschao/articles/10391859.html#part_2

简单版回复html页面的web框架

python代码

server.py

import socket

server = socket.socket()

server.bind(('127.0.0.1', 8001))

server.listen()

while 1:

    conn,addr = server.accept()

    from_brower_msg = conn.recv(1024)

    path = from_brower_msg.decode('utf-8').split(' ')[1]

    print(path)

    conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    if path == '/':

        with open('05dong.html', 'rb')as f:

            data = f.read()

    elif path == '/style.css':

        with open('style.css', 'rb') as f:

            data = f.read()

    elif path == '/test.js':

        with open('test.js', 'rb') as f:

            data = f.read()

    elif path == '/1.jpg':

        with open('1.jpg', 'rb') as f:

            data = f.read()

    conn.send(data)

    conn.close()
html代码

04test.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <link rel="stylesheet" href="style.css">

<!--    <link rel="icon" href="favicon.ico">-->

</head>

<body>

<h1>24期官网</h1>

<div>

    <img src="1.jpg" alt="">

</div>

</body>

<script src="test.js"></script>

</html>
样式和js等文件

style.css

body{

    background: red;

}

test.js

alert(123);

图片文件--1.jpg

基础函数版

python代码

server.html

import socket

from threading import Thread

server = socket.socket()

server.bind(('127.0.0.1',8003))

server.listen()

def home(conn):

    with open('04test.html', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def css(conn):

    with open('style.css', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def js(conn):

    with open('test.js', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def pic(conn):

    with open('1.jpg', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def nofount(conn):

    conn.send(b'not found 404!')

    conn.close()

def ico(conn):

    with open('favicon.ico', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

urlpatterns = [

    ('/',home),

    ('/style.css',css),

    ('/test.js',js),

    ('/1.jpg',pic),

    ('/favicon.ico',ico),

]

while 1:

    conn,addr = server.accept()

    from_brower_msg = conn.recv(1024)

    path = from_brower_msg.decode('utf-8').split(' ')[1]

    print(path)

    conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    for url in urlpatterns:

        if path == url[0]:

            # ret = url[1]()

            t = Thread(target=url[1],args=(conn,))

            t.start()

            break

    else:

        t = Thread(target=nofount,args=(conn,))

        t.start()
html代码

04test.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <link rel="stylesheet" href="style.css">

    <link rel="icon" href="favicon.ico">

</head>

<body>

<div>

    <img src="1.jpg" alt="">

</div>

<script src="test.js"></script>

</body>

</html>
样式和js等文件

style.css

body{

    background: red;

}

test.js

alert(123);

图片文件--1.jpg

进阶函数版

python文件

server.py

import socket

from urls import urlpatterns

from threading import Thread

import views

server = socket.socket()

server.bind(('127.0.0.1',8003))

server.listen()

while 1:

    conn,addr = server.accept()

    from_brower_msg = conn.recv(1024)

    path = from_brower_msg.decode('utf-8').split(' ')[1]

    print(path)

    conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    for url in urlpatterns:

        if path == url[0]:

            t = Thread(target=url[1], args=(conn,))

            t.start()

            break

    else:

        t = Thread(target=views.nofount, args=(conn,))

        t.start()

列表文件--urls.py

import views

urlpatterns = [

    ('/',views.home),

    ('/style.css',views.css),

    ('/test.js',views.js),

    ('/1.jpg',views.pic),

    ('/favicon.ico',views.ico),

]

函数文件--views.py



def home(conn):

    with open('05dong.html', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def css(conn):

    with open('style.css', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def js(conn):

    with open('test.js', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def pic(conn):

    with open('1.jpg', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def nofount(conn):

    conn.send(b'not found 404!')

    conn.close()

def ico(conn):

    with open('favicon.ico', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()
html文件

05dong.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <link rel="stylesheet" href="style.css">

<!--    <link rel="icon" href="favicon.ico">-->

</head>

<body>

<h1>24期官网</h1>

<div>

    <img src="1.jpg" alt="">

</div>

</body>

<script src="test.js"></script>

</html>
样式和js等文件

style.css

body{

    background: red;

}

test.js

alert(123);

图片文件--1.jpg

动态页面的web框架

python文件

server.py

import socket

server = socket.socket()

server.bind(('127.0.0.1', 8003))

server.listen()

while 1:

    username = "朱凡宇"

    conn, addr = server.accept()

    from_brower_msg = conn.recv(1024)

    path = from_brower_msg.decode('utf-8').split(" ")[1]

    conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    with open('dong.html', 'r', encoding='utf-8')as f:

        data = f.read()

    data = data.replace('%xxoo%', username)

    conn.send(data.encode())

    conn.close()
html文件

dong.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

<h1>欢迎来到%xxoo%的首页</h1>

</body>

</html>

不同html页面的web框架

python文件

server

import socket

from urls import urlpatterns

from threading import Thread

import views

server = socket.socket()

server.bind(('127.0.0.1',8003))

server.listen()

while 1:

    conn,addr = server.accept()

    from_brower_msg = conn.recv(1024)

    path = from_brower_msg.decode('utf-8').split(' ')[1]

    print(path)

    conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    for url in urlpatterns:

        if path == url[0]:

            t = Thread(target=url[1], args=(conn,))

            t.start()

            break

    else:

        t = Thread(target=views.nofount, args=(conn,))

        t.start()

urls

import views

urlpatterns = [

    ('/',views.home),

    ('/center',views.person_center),

]

views

def home(conn):

    with open('05dong.html', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def person_center(conn):

    with open('center.html', 'rb') as f:

        data = f.read()

    conn.send(data)

    conn.close()

def nofount(conn):

    conn.send(b'not found 404!')

    conn.close()
html文件

05dong.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

<h1>欢迎24期来到xx网站</h1>

<a href="/center">个人中心</a>

</body>

</html>

center.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

<h1>欢迎来到xx个人中心</h1>

</body>

</html>

wsgiref模块

python文件

server

from wsgiref.simple_server import make_server

from urls import urlpatterns

def application(environ,start_response):

    # environ  所有请求相关信息

    # start_response --封装响应数据格式

    path = environ['PATH_INFO']

    start_response('200 ok',[])  # conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    for url in urlpatterns:

        if path == url[0]:

            ret = url[1]()

            break

    return [ret]

if __name__ == '__main__':

    h = make_server('127.0.0.1', 8080, application)

    h.serve_forever()

urls

import views

urlpatterns = [

    ('/',views.home),

]

views

def home():

    with open('05dong.html', 'rb') as f:

        data = f.read()

    return data
html文件

05dong.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

<h1>欢迎24期来到xx网站</h1>

</body>

</html>

jinja2模块

python文件

server

import socket

from urls import urlpatterns

from threading import Thread

import views

server = socket.socket()

server.bind(('127.0.0.1',8003))

server.listen()

while 1:

    conn,addr = server.accept()

    from_brower_msg = conn.recv(1024)

    path = from_brower_msg.decode('utf-8').split(' ')[1]

    print(path)

    conn.send(b'HTTP/1.1 200 ok\r\n\r\n')

    for url in urlpatterns:

        if path == url[0]:

            t = Thread(target=url[1], args=(conn,))

            t.start()

            break

urls

import views

urlpatterns = [

    ('/',views.home),

    # ('/center',views.person_center),

    # ('/style.css',views.css),

    # ('/test.js',views.js),

    # ('/1.jpg',views.pic),

    # ('/favicon.ico',views.ico),

]

views

from jinja2 import Template

def home(conn):

    # {% for i in hobby %}

    # <li>{{ i }}</li>

    # {% endfor %}

    with open('08jinja2test.html', 'r',encoding='utf-8') as f:

        data = f.read()

    t = Template(data)

    ret = t.render({'hobby':['金钱','女人','张达'], 'name': '朱凡宇'})

    conn.send(ret.encode('utf-8'))

    conn.close()
html文件

08jinja2test.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

<h1>{{ name }}个人介绍</h1>

我的爱好

<ul>

    {% for i in hobby %}

    <li>{{ i }}</li>

    {% endfor %}

</ul>

</body>

</html>

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