import socket server = socket.socket() server.bind(('127.0.0.1',8080)) server.listen(5) while True: conn, addr = server.accept() data = conn.recv(1024) conn.send(b'HTTP/1.1 200 OK ') print(data) data = data.decode('utf-8') current_path = data.split(' ')[0].split(' ')[1] if current_path == '/index': # conn.send(b'<h1>hello baby!</h1>') with open('web.html','rb') as f: conn.send(f.read()) else: conn.send(b'404') conn.close()
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="bootstrap-3.3.7/css/bootstrap.min.css"> <script src="bootstrap-3.3.7/js/bootstrap.min.js"></script> </head> <body> <h1>Hello World</h1> </body> </html>
from wsgiref.simple_server import make_server from urls import urls from views import * def run(env,response): print(env) # 是个字典类型 # 固定写法 response('200 OK',[]) # 列表里面放的是请求首行的信息,可以不放,但是必须写 # 获取当前用户访问路径 current_path = env.get('PATH_INFO') # 定义一个函数标志位 func = None for url_list in urls: # urls:[[],[],[]] url_list:['',func] if current_path == url_list[0]: func = url_list[1] # 结束for循环了 break if func: res = func(env) else: # 匹配不上 走error res = error(env) return [res.encode('utf-8')] if __name__ == '__main__': server = make_server('127.0.0.1',8888,run) server.serve_forever()
from views import * urls = [ ['/index',index], ['/login',login], ['/reg',reg], ['/get_time',get_time], ['/xxx',get_user], ['/get_db',get_db_info] ]
from datetime import datetime from jinja2 import Template import pymysql def index(env): with open('templates/index.html','r',encoding='utf-8') as f: data = f.read() return data def login(env): return 'login' def error(env): return '404 error' def reg(env): return 'reg' def get_time(env): ctime = datetime.now().strftime('%Y-%m-%d %X') # 打开文件 with open('templates/get_time.html','r',encoding='utf-8') as f: data = f.read() res = data.replace('@@time@@',ctime) return res def get_user(env): user = {'name':'jason','age':'18'} with open('templates/get_user.html','r',encoding='utf-8') as f: data = f.read() tmp = Template(data) res = tmp.render(data=user) return res def get_db_info(env): conn = pymysql.connect( host = '127.0.0.1', port = 3306, user = 'root', password = '123321', database = 'test007', charset = 'utf8', autocommit = True ) cursor = conn.cursor(pymysql.cursors.DictCursor) cursor.execute('select * from userinfo') user_list = cursor.fetchall() # 打开文件渲染到前端页面 with open('templates/get_db_user.html','r',encoding='utf-8') as f: data = f.read() tmp = Template(data) res = tmp.render(user_list=user_list) return res
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <div class="row"> <table class="table table-bordered table-hover table-striped"> <thead> <tr> <th>id</th> <th>name</th> <th>age</th> </tr> </thead> <tbody> {% for data in user_list %} <tr> <td>{{data.id}}</td> <td>{{data.name}}</td> <td>{{data.age}}</td> </tr> {% endfor %} </tbody> </table> </div> </div> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="bootstrap-3.3.7/css/bootstrap.min.css"> <script src="bootstrap-3.3.7/js/bootstrap.min.js"></script> </head> <body> @@time@@ </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="bootstrap-3.3.7/css/bootstrap.min.css"> <script src="bootstrap-3.3.7/js/bootstrap.min.js"></script> </head> <body> <h1>{{ data }}</h1> <h1>{{ data.name }}</h1> <h1>{{ data['name'] }}</h1> <h1>{{ data.get('name') }}</h1> <h1>{{ data.age }}</h1> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="bootstrap-3.3.7/css/bootstrap.min.css"> <script src="bootstrap-3.3.7/js/bootstrap.min.js"></script> </head> <body> <h1>index</h1> </body> </html>
web服务执行流程
浏览器发送二进制遵循http协议的数据，服务器接收先url匹配，在执行视图函数，视图函数中调用模版和数据库数据渲染。
""" a:socket通信 b:路由与视图 c:模版渲染 django：a用的别人的wsgiref，b：自己写的，c：自己写的 flask：a用的别人的werkzeug，b：自己写的，c：用了别人的jinja2 tornado：a自己写的，b：自己写的，c：自己写的 """
#注意事项： - django安装版本建议1.11左右 - 计算机名称不能是中文(尤其要注意)，改名重启即可！ - django安装命令pip install django==1.11.11 - 文件夹不要再以dayxx多层叠加，一个项目就是一个单独的pycharm窗口 命令行创建django项目 django-admin startproject mysite 命令行创建app python manage.py startapp 应用名 命令行启动django python manage.py runserver 用命令行创建的时候,默认没有templates文件夹,需要你自己手动创建 并且在settings配置文件中写上路径 pycharm下载 点加号 选版本 创建new project选第二个django项目(选本机环境,暂时不要选虚拟环境) 两种创建app的方式: python manage.py startapp 应用名 tools下面的run manage.py 能够简写并自动提示 运行方式 python manage.py runserver pycharm自动启动
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', ], }, }, ]
static静态文件配置
STATICFILES_DIRS = [ os.path.join(BASE_DIR, "static"), # 静态文件存放位置 ]
app01 migrations #数据库迁移记录相关 models.py #orm模型类 views.py #视图函数 templates #放html文件 manage.py # 管理文件 mysite # 项目目录 __init__.py settings.py # 配置 urls.py # 路由 --> URL和函数的对应关系 wsgi.py # runserver命令就使用wsgiref模块做简单的web serve
- HttpResponse 返回字符串
- render 渲染页面并返回
- redirect 重定向