Jinja2是基于python的模板引擎，功能比较类似于于PHP的smarty，J2ee的Freemarker和velocity。 它能完全支持unicode，并具有集成的沙箱执行环境，应用广泛。jinja2使用BSD授权。

import socket

sk =socket.socket()

sk.bind(('127.0.0.1',))

sk.listen()

while True:

    conn,addr =sk.accept()

    data =conn.recv()

    print(data)

    conn.send(b'ok')

    conn.close()

b'GET / HTTP/1.1\r\nHost: 127.0.0.1:8080\r\n
Connection: keep-alive\r\nUpgrade-Insecure-Requests: 1\r\n
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36\r\n
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\nAccept-Encoding: gzip, deflate, sdch, br\r\n
Accept-Language: zh-CN,zh;q=0.8\r\n\r\n'

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

sock.bind(('127.0.0.1', 8000))

sock.listen()

while True:

    conn, addr = sock.accept()

    data = conn.recv(8096)

    # 给回复的消息加上响应状态行

    conn.send(b"HTTP/1.1 200 OK\r\n\r\n")

    conn.send(b"OK")

    conn.close()　　

"""

不完善的web服务端示例

"""

import socket

# 生成socket实例对象

sk = socket.socket()

# 绑定IP和端口

sk.bind(("127.0.0.1", 8001))

# 监听

sk.listen()

# 写一个死循环,一直等待客户端来连我

while 1:

    # 获取与客户端的连接

    conn, _ = sk.accept()

    # 接收客户端发来消息

    data = conn.recv(8096)

    print(data)

    # 给客户端回复消息

    conn.send(b'http/1.1 200 OK\r\ncontent-type:text/html; charset=utf-8\r\n\r\n')

    # 想让浏览器在页面上显示出来的内容都是响应正文

    conn.send(b'<h1>hello s10!</h1>')

    # 关闭

    conn.close()

    sk.close()

import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听

while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    # 从data中取到路径
    data = str(data, encoding="utf8")  # 把收到的字节类型的数据转换成字符串
    # 按\r\n分割
    print(data)
    print("**"*20)###
    data1 = data.split("\r\n")[0] # 获取 第一行数据
    print(data1)
    print("**"*20)
    url = data1.split()[1]  # 通过空格吧他区分开来，，url是我们从浏览器发过来的消息中分离出的访问路径
    print(url)
    print("**"*20)
    conn.send(b'HTTP/1.1 200 OK\r\n\r\n')  # 因为要遵循HTTP协议，所以回复的消息也要加状态行
    # 根据不同的路径返回不同内容
    if url == "/index/":
        response = b"index"
    elif url == "/home/":
        response = b"home"
    else:
        response = b"404 not found!"

    conn.send(response)
    conn.close()

C:\Python36\python3.exe D:/PycharmProjects/删除.py

GET /index/ HTTP/1.1

Host: 127.0.0.1:8080

Connection: keep-alive

Cache-Control: max-age=0

Upgrade-Insecure-Requests: 1

User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Encoding: gzip, deflate, sdch, br

Accept-Language: zh-CN,zh;q=0.8

Cookie: __guid=96992031.2553796166569308000.1524818350890.1082; monitor_count=9

****************************************

GET /index/ HTTP/1.1

****************************************
/index/
****************************************

django-admin  startproject   mysite# 创建名为mysite的django项目

TEMPLATES = [

    {

        'BACKEND': 'django.template.backends.django.DjangoTemplates',

        'DIRS': [os.path.join(BASE_DIR, "template")],  # template文件夹位置

        'APP_DIRS': True,

        'OPTIONS': {

            'context_processors': [

                'django.template.context_processors.debug',

                'django.template.context_processors.request',

                'django.contrib.auth.context_processors.auth',

                'django.contrib.messages.context_processors.messages',

            ],

        },

    },

]

复制代码

STATIC_URL = '/static/'  # HTML中使用的静态文件夹前缀

STATICFILES_DIRS = [

    os.path.join(BASE_DIR, "static"),  # 静态文件存放位置

]

MIDDLEWARE = [

    'django.middleware.security.SecurityMiddleware',

    'django.contrib.sessions.middleware.SessionMiddleware',

    'django.middleware.common.CommonMiddleware',

    # 'django.middleware.csrf.CsrfViewMiddleware',

    'django.contrib.auth.middleware.AuthenticationMiddleware',

    'django.contrib.messages.middleware.MessageMiddleware',

    'django.middleware.clickjacking.XFrameOptionsMiddleware',

]

from django.shortcuts import HttpResponse, render, redirect

def index(request):

    # 业务逻辑代码

    return HttpResponse("OK")

def index(request):

    # 业务逻辑代码

    return render(request, "index.html", {"name": "alex", "hobby": ["烫头", "泡吧"]})

def index(request):

    # 业务逻辑代码

    return redirect("/home/")

# Static files (CSS, JavaScript, Images)

# https://docs.djangoproject.com/en/1.11/howto/static-files/

##静态文件保存目录的别名

STATIC_URL = '/static/'

##所有静态文件（css/jss/图片）都防止我们下面配置的文件夹中

STATICFILES_DIRS =[

    os.path.join(BASE_DIR,'static')

]

from django.shortcuts import HttpResponse,render
def yimi(request):
    #request 参数保存了所有和用户浏览器请求相关的数据
    # return b'hello yimni!'
    return HttpResponse('hello yimi!!') #httpresponse 把http协议消息都已经封装好了.

def xiaohei(request):
    return HttpResponse('hello xiaohei')

def index(request):
    return  render(request,'index.html')

urlpatterns=[
    url(r'^yimi/',yimi),
    url(r'^xiaohei/',xiaohei),
    url(r'^index/',index)
]

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))  获取根目录的路径

TEMPLATES = [

    {

        'BACKEND': 'django.template.backends.django.DjangoTemplates',
     ##告诉Django我们用到的html文件你都去这里找

        'DIRS': [os.path.join(BASE_DIR, 'templates')]

        ,