可拔插视图
基于类的视图
1、写类，继承flask.views.View
2、实现方法，dipatch_request(self)
3、app注册网址规则：
1.导入视图类
2.app.add_url_rule(地址, view_func=类名.as_view(终结点))
新建一个html，为注册页
新开一个路径，下面新建一个py文件用于存放类的视图
"""
基于类的视图， 每一个视图写为一个类，用于做视图分类，如用户管理模块、业务处理模块
dispatch_request：调度请求
"""
from flask import render_template
from flask.views import View
class RegUser(View):
""" 注册 """
def dispatch_request(self):
return render_template('reg.html')
class UserLogin(View):
""" 登录 """
def dispatch_request(self):
return render_template('login.html')
为避免冲突，把main里面的login注释掉
在main里面调用刚刚的类视图
base.html加一个注册按钮，重定向到终结点为reg的视图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>-问题反馈系统</title>
<!--bootstrap、jquery、font-awesome-->
<link href="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script>
<link href="https://cdn.bootcss.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet">
<script src="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<!--导航栏-->
<div class="row">
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1--collapse">
<span class="sr-only"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">问题反馈系统</a>
</div>
<div class="collapse navbar-collapse navbar-ex1--collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="{{ url_for('feedback') }}">首页</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">反馈管理<b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="{{ url_for('list') }}">问题列表</a></li>
</ul>
<a href="{{ url_for('reg') }}">用户注册</a>
</li>
</ul>
<form class="navbar-form navbar-left" role="search">
<div class="for-group">
<input type="text" class="form-control" placeholder="Search">
<button type="submit" class="btn btn-default">submit</button>
</div>
</form>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">{{ session['admin'] if session['admin'] else '未登录' }}<b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="{{ url_for('logout') }}">退出</a></li>
</ul>
</li>
</ul>
</div>
</nav>
</div>
<!--面包屑导航-->
<div class="row">
<ul class="breadcrumb">
<li><a href="/">首页</a></li>
<li class="active">问题反馈</li>
</ul>
</div>
<!--正文部分预留空间，其他页面只需要继承过后往这里面添加内容即可-->
{% block main_content %}
{% endblock %}
<!--页脚-->
<div class="row">
<div class="well text-center">
©版权所有 <a href="https://www.baidu.com/">点击跳转</a>
</div>
</div>
</div>
</body>
</html>
点用户注册，跳转到注册页面
基于方法的视图
1、写类，继承flask.views.MethodView
2、实现方法
GET: def get(self):
POST：def post(self):
PUT def put(self):
3、app注册网址规则：
1.导入视图类
2.app.add_url_rule(地址, view_func=类名.as_view(终结点))
from flask import render_template
from flask.views import View, MethodView
class ARegUser(MethodView):
def get(self):
""" get时的处理逻辑 """
return render_template('reg.html')
def post(self):
""" post时的处理逻辑 """
pass
调用
# 调用基于方法的视图
from account.views import ARegUser
app.add_url_rule('/reg/', view_func=ARegUser.as_view('reg'))
views.py
"""
基于类的视图， 每一个视图写为一个类，用于做视图分类，如用户管理模块、业务处理模块
dispatch_request：调度请求
"""
from flask import render_template
from flask.views import View, MethodView
class ARegUser(MethodView):
def get(self):
""" get时的处理逻辑 """
return render_template('reg.html')
def post(self):
""" post时的处理逻辑 """
pass
class RegUser(View):
""" 注册 """
def dispatch_request(self):
return render_template('reg.html')
class UserLogin(View):
""" 登录 """
def dispatch_request(self):
return render_template('login.html')
main.py
# coding:utf-8
import sqlite3
from datetime import datetime, timedelta
from flask import Flask, request, render_template, redirect, url_for, g, send_from_directory, session, make_response
app = Flask(__name__)
DATABASE = r'.dbfeedbach.db'
'=======================封装sql助手函数============================='
def make_dicts(cursor, row):
""" 将游标获取的Tuple根据数据库列表转换为dict """
return dict((cursor.description[idx][0], value) for idx, value in enumerate(row))
def get_db():
""" 获取(简历数据库链接)
g: flask内置的变量：g = LocalProxy(partial(_lookup_app_object, "g"))
"""
db = getattr(g, '_database', None)
if not db:
db = g._database = sqlite3.connect(DATABASE)
db.row_factory = make_dicts
return db
def execute_sql(sql, params=()):
""" 执行sql语句不返回数据结果 insert、update、delete """
c = get_db().cursor()
c.execute(sql, params)
c.connection.commit()
def query_sql(sql, params=(), one=False):
""" 查询数据 one=False的时候返回多条"""
c = get_db().cursor()
result = c.execute(sql, params).fetchall()
c.close()
return (result[0] if result else None) if one else result
@app.teardown_appcontext # 在当前app上下文销毁时执行
def close_connection(exeption):
""" 关闭数据库 """
db = getattr(g, '_database', None)
if db is not None:
db.close()
'========================================================================'
@app.route("/")
def index():
return render_template('base.html')
app.secret_key = 'qoihf2397r21380r2/./ad' # 加密的安全码，越复杂越好，flask后台自动进行加密
# @app.route('/login/', methods=['GET', 'POST'])
# def login():
# """ 登录 """
# if request.method == 'POST':
# username = request.form.get('username')
# password = request.form.get('password')
# sql = 'select count(*) as [Count] from UserInfo where username = ? and password = ?'
# result = query_sql(sql, (username, password), True)
# if int(result.get('Count')) > 0:
# print(username)
# session['admin'] = username # 已登录的用户保存到session
# return redirect(url_for('list'))
# return '用户名或密码错误'
# return render_template('login.html')
# 模板继承
@app.route("/feedback/")
def feedback():
return render_template('post.html')
UPLOAD_FOLDER = r'.uploads' # 声明存文件的目录
ALLOWED_EXTENSIONS = ['.jpg', '.png', '.gif'] # 允许上传的后缀，限制上传格式
import os
def allowed_file(filename):
""" 判断文件是否允许上传 """
# filename = 'asdasdasd.jpg'
_, ext = os.path.splitext(filename)
return ext.lower() in ALLOWED_EXTENSIONS # 把后缀转为小写
@app.route("/post_feedback/", methods=["POST"])
def post_feedback():
""" 提交视图 """
if request.method == 'POST': # 如果是post请求就获取表单值
subject = request.form.get('subject', None)
categoryid = request.form.get('category', 1)
username = request.form.get('username')
email = request.form.get('email')
body = request.form.get('body')
release_time = str(datetime.now())
state = 0
img_path = None
# 提交的内容包含图片，就获取图片名字用于插入数据库，并保存图片
if request.files.get('file_s', None):
img = request.files['file_s']
if allowed_file(img.filename):
# 为防止文件名重复，重命名文件
img_path = datetime.now().strftime('%Y%m%d%H%M%f') + os.path.splitext(img.filename)[1]
img.save(os.path.join(UPLOAD_FOLDER, img_path))
print(subject, categoryid, username, email, body, state, release_time, img_path)
conn = sqlite3.connect(DATABASE)
c = conn.cursor()
# 防止sql注入，用？代替值
sql = "insert into feedback (Subjeck, CategoryID, UserName, Email, Body, State, ReleaseTime, Image) values (?,?,?,?,?,?,?,?)"
c.execute(sql, (subject, categoryid, username, email, body, state, release_time, img_path))
conn.commit()
conn.close()
# 为防止因卡顿引起重复提交，提交过后跳转到填写页面
return redirect(url_for('feedback'))
@app.route("/list/")
def list():
""" 展示所有问题 """
# 访问/list/的时候，如果session里面没有admin，就返回登录页
if session.get('admin', None) is None:
return redirect(url_for('login'))
key = request.args.get('key', '')
sql = 'select f.ROWID,f.*,c.CategoryName from feedback f INNER JOIN category c on c.ROWID = f.CategoryID where f.Subjeck like ? order by f.ROWID'
feedbacks = query_sql(sql, (f'%{key}%',))
return render_template('feedback-list.html', items=feedbacks)
@app.route('/del/<id>/')
def delete_feedback(id=0):
""" 删除问题 ，前端传id"""
conn = sqlite3.connect(DATABASE)
c = conn.cursor()
sql = "delete from feedback where ROWID = ?"
c.execute(sql, (id,))
conn.commit()
conn.close()
return redirect(url_for('list'))
@app.route('/profile/<filename>')
def render_file(filename):
""" 呈现特定目录下的资源，用于jinja2模板调用渲染服务器的图片"""
return send_from_directory(UPLOAD_FOLDER, filename) # uploads + feilename
@app.route("/edit/<id>/")
def edit(id=None):
""" 根据前端传过来的id返回编辑的html """
# 访问/edit/<id>/的时候，如果session里面没有admin，就返回登录页
if session.get('admin', None) is None:
return redirect(url_for('login'))
# 获取绑定的下拉列表
sql = "select ROWID,CategoryName from category"
categories = query_sql(sql)
# 获取当前id的信息，并绑定至form表单，以备修改
sql = "select rowid,* from feedback where rowid = ?"
curren_feedback = query_sql(sql, (id,), True)
# return str(curren_feedback) # 查看查出来的数据顺序，方便html渲染排序
return render_template('edit.html', categories=categories, item=curren_feedback)
@app.route("/save_edit/", methods=['POST'])
def save_edit():
""" 保存编辑 """
if request.method == 'POST':
id = request.form.get('rowid', None)
reply = request.form.get('reply')
state = 1 if request.form.get('state', 0) == 'on' else 0
sql = 'update feedback set Reply=?, State=? where rowid=?'
conn = sqlite3.connect(DATABASE)
c = conn.cursor()
c.execute(sql, (reply, state, id))
conn.commit()
conn.close()
return redirect(url_for('list'))
@app.route('/logout/')
def logout():
""" 退出登录，删除session跳转到登录页 """
session.pop('admin')
return redirect(url_for('list')) # 为了防止在页面上点后退的情况，让list视图来执行让页面跳转到登录页
@app.route('/setck/')
def setck():
""" 添加cookie，timedelta由datatime导入 """
response = make_response('ok')
response.set_cookie('username', 'aaa', path='/', expires=datetime.now() + timedelta(days=7))
# set_cookie 参数
# dmain='baidu.com' 指定cookie只对baidu.com起作用
# path='/' 此cookie能访问的路径
# httponly=True 只能http访问，默认关闭
# max_age=60 cookie生命周期，默认为None，浏览器关闭时销毁，单位为秒
# expires=datetime.now() + timedelta(days=7) # 指定过期时间为7天
return response
@app.route('/getck/')
def getck():
""" 获取cookie request.cookies.get('xxx') """
ck = request.cookies.get('username')
if ck:
return ck
return '未获取到cookie'
@app.route('/rmck/')
def remove_cookie():
""" 删除cookie，
由于不允许直接操作硬盘，所以采用更新cookie生效时间的方法
找到cookie，把生效时间设为当前时间之前
"""
resp = make_response('删除cookie')
# 把生效时间设为上一秒
resp.set_cookie('username', '', expires=datetime.now() + timedelta(minutes=-1))
return resp
# 调用基于类的视图
from account.views import RegUser, UserLogin
# 为导入的基于类的视图添加分配url规则
# 第一个参数：地址，第二个login为终结点，即视图函数名，可用于重定向
# app.add_url_rule('/login/', view_func=UserLogin.as_view('login'))
# app.add_url_rule('/reg/', view_func=RegUser.as_view('reg'))
# 调用基于方法的视图
from account.views import ARegUser
app.add_url_rule('/login/', view_func=UserLogin.as_view('login'))
app.add_url_rule('/reg/', view_func=ARegUser.as_view('reg'))
if __name__ == '__main__':
app.run(
debug=True
)