#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author:chenshifeng
@file:flask_demo.py
@time:2021/03/01
"""
from flask import Flask

app = Flask(__name__)


@app.route('/post/int:post_id>')
def show_post(post_id):
 # show the post with the given id, the id is an integer
 return 'Post %d' % post_id

@app.route('/path/path:subpath>')
def show_subpath(subpath):
 # show the subpath after /path/
 return 'Subpath %s' % subpath

if __name__ == '__main__':
 app.run(debug=True)

@app.route('/projects/')
def projects():
 return 'The project page'

@app.route('/about')
def about():
 return 'The about page'

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author:chenshifeng
@file:flask_demo.py
@time:2021/03/01
"""
from flask import Flask, redirect, url_for

app = Flask(__name__)

@app.route('/admin')
def hello_admin():
 return 'Hello Admin'

@app.route('/guest/guest>')
def hello_guest(guest):
 return 'Hello %s as Guest' % guest
@app.route('/user/name>')
def hello_user(name):
 if name == 'admin':
 return redirect(url_for('hello_admin'))
 else:
 return redirect(url_for('hello_guest', guest=name))
if __name__ == '__main__':
 app.run(debug=True)

html>
 body>
 
 form action = "http://localhost:5000/login" method = "post">
 p>Enter Name:/p>
 p>input type = "text" name = "nm" />/p>
 p>input type = "submit" value = "submit" />/p>
 /form>
 
 /body>
/html>

from flask import Flask, redirect, url_for, request
app = Flask(__name__)

@app.route('/success/name>')
def success(name):
 return 'welcome %s' % name

@app.route('/login',methods = ['POST', 'GET'])
def login():
 if request.method == 'POST':
 user = request.form['nm']
 return redirect(url_for('success',name = user))
 else:
 user = request.args.get('nm')
 return redirect(url_for('success',name = user))

if __name__ == '__main__':
 app.run(debug = True)

user = request.form['nm']

User = request.args.get('nm')

/application.py
/templates
 /hello.html

/application
 /__init__.py
 /templates
 /hello.html

from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def index():
 my_int = 18
 my_str = 'curry'
 my_list = [1, 5, 4, 3, 2]
 my_dict = {
 'name': 'durant',
 'age': 28
 }

 # render_template方法:渲染模板
 # 參數(shù)1: 模板名稱 參數(shù)n: 傳到模板里的數(shù)據(jù)
 return render_template('hello.html',
  my_int=my_int,
  my_str=my_str,
  my_list=my_list,
  my_dict=my_dict)


if __name__ == '__main__':
 app.run(debug=True)

!DOCTYPE html>
html lang="en">

head>
 meta charset="UTF-8">
 title>Title/title>
/head>

body>
 h2>我是模板/h2>
 {{ my_int }}
 br>
 {{ my_str }}
 br>
 {{ my_list }}
 br>
 {{ my_dict }}
 hr>
 h2>模板的list數(shù)據(jù)獲取/h2>
 hr>
 {{ my_list[0] }}
 br>
 {{ my_list.1 }}
 hr>
 h2>字典數(shù)據(jù)獲取/h2>
 hr>
 {{ my_dict['name'] }}
 br>
 {{ my_dict.age }}
 hr>
 h2>算術(shù)運(yùn)算/h2>
 br>
 {{ my_list.0 + 10 }}
 br>
 {{ my_list[0] + my_list.1 }}
/body>

/html>

url_for('static', filename='style.css')

from flask import Flask, render_template
app = Flask(__name__)

@app.route("/")
def index():
 return render_template("index.html")

if __name__ == '__main__':
 app.run(debug = True)

html>

 head>
 script type = "text/javascript"
 src = "{{ url_for('static', filename = 'hello.js') }}" >/script>
 /head>

 body>
 input type = "button" onclick = "sayHello()" value = "Say Hello" />
 /body>

/html>

function sayHello() {
 alert("Hello World")
}

from flask import request

from flask import Flask, render_template, request
app = Flask(__name__)
@app.route('/')
def student():
 return render_template('student.html')


@app.route('/result',methods = ['POST', 'GET'])
def result():
 if request.method == 'POST':
 result = request.form
 return render_template("result.html",result = result)


if __name__ == '__main__':
 app.run(debug = True)

!DOCTYPE html>
html lang="en">
head>
 meta charset="UTF-8">
 title>Title/title>
/head>
body>
 form action="http://localhost:5000/result" method="POST">
 p>Name input type = "text" name = "Name" />/p>
 p>Physics input type = "text" name = "Physics" />/p>
 p>Chemistry input type = "text" name = "chemistry" />/p>
 p>Maths input type ="text" name = "Mathematics" />/p>
 p>input type = "submit" value = "submit" />/p>
 /form>
/body>
/html>

!doctype html>
 table border = 1>
 {% for key, value in result.items() %}
 tr>
 th> {{ key }} /th>
 td> {{ value }}/td>
 /tr>
 {% endfor %}
/table>

cookie_1 = request.cookies.get("chenshifeng")

resp = make_response("del success") # 設(shè)置響應(yīng)體
resp.delete_cookie("chenshifeng")

resp = make_response("del success") # 設(shè)置響應(yīng)體
resp.delete_cookie("chenshifeng")

from flask import Flask, make_response, request

app = Flask(__name__)

@app.route("/set_cookies")
def set_cookie():
 resp = make_response("success")
 resp.set_cookie("chenshifeng", "shifengboy",max_age=3600)
 return resp

@app.route("/get_cookies")
def get_cookie():
 cookie_1 = request.cookies.get("chenshifeng") # 獲取名字為Itcast_1對(duì)應(yīng)cookie的值
 return cookie_1

@app.route("/delete_cookies")
def delete_cookie():
 resp = make_response("del success")
 resp.delete_cookie("chenshifeng")

 return resp

if __name__ == '__main__':
 app.run(debug=True)

Session['username'] = 'admin'

session.pop('username', None)

from flask import Flask, session, redirect, url_for, request

app = Flask(__name__)

app.secret_key = 'fkdjsafjdkfdlkjfadskjfadskljdsfklj' # 確保設(shè)置應(yīng)用程序的secret_key


@app.route('/')
def index():
 if 'username' in session:
 username = session['username']

 return '登錄用戶名是:' + username + 'br>' + \

  "b>a href = '/logout'>點(diǎn)擊這里注銷(xiāo)/a>/b>"

 return "您暫未登錄， br>a href = '/login'>/b>" + \

  "點(diǎn)擊這里登錄/b>/a>"


@app.route('/login', methods=['GET', 'POST'])
def login():
 if request.method == 'POST':
 session['username'] = request.form['username']

 return redirect(url_for('index'))

 return '''

 form action = "" method = "post">

 p>input type ="text" name ="username"/>/p>

 p>input type ="submit" value ="登錄"/>/p>

 /form>

 '''


@app.route('/logout')
def logout():
 # remove the username from the session if it is there

 session.pop('username', None)

 return redirect(url_for('index'))


if __name__ == '__main__':
 app.run(debug=True)

Flask.redirect(location, statuscode, response)

from flask import Flask, redirect, url_for, render_template, request

# Initialize the Flask application
app = Flask(__name__)


@app.route('/')
def index():
 return render_template('log_in.html')


@app.route('/login', methods=['POST', 'GET'])
def login():
 if request.method == 'POST' and request.form['username'] == 'admin':
  return redirect(url_for('success'))
 return redirect(url_for('index'))

@app.route('/success')
def success():
 return 'logged in successfully'

if __name__ == '__main__':
 app.run(debug=True)

!DOCTYPE html>
html lang="en">
head>
 meta charset="UTF-8">
 title>Title/title>
/head>
body>
  form action = "http://localhost:5000/login" method = "POST">
   p>Enter Name:/p>
   p>input type = "text" name = "username" />/p>
   p>input type = "submit" value = "submit" />/p>
  /form>
/body>
/html>

Flask.abort(code)

from flask import Flask, redirect, url_for, render_template, request, abort

app = Flask(__name__)

@app.route('/')
def index():
 return render_template('log_in.html')

@app.route('/login', methods=['POST', 'GET'])
def login():
 if request.method == 'POST':
  if request.form['username'] == 'admin':
   return redirect(url_for('success'))
  else:
   abort(401)
 else:
  return redirect(url_for('index'))

@app.route('/success')
def success():
 return 'logged in successfully'

if __name__ == '__main__':
 app.run(debug=True)

flash(message, category)

from flask import Flask, flash, redirect, render_template, \

  request, url_for

app = Flask(__name__)
app.secret_key = b'_5#y2L"F4Q8z\n\xec]/'

@app.route('/')
def index():
 return render_template('index.html')

@app.route('/login', methods=['GET', 'POST'])
def login():
 error = None
 if request.method == 'POST':
  if request.form['username'] != 'admin' or \

   request.form['password'] != 'secret':
   error = 'Invalid credentials'
  else:
   flash('You were successfully logged in')
   return redirect(url_for('index'))
 return render_template('login.html', error=error)

if __name__ == '__main__':
 app.run(debug=True)

!doctype html>
title>My Application/title>
{% with messages = get_flashed_messages() %}
 {% if messages %}
 ul class=flashes>
 {% for message in messages %}
  li>{{ message }}/li>
 {% endfor %}
 /ul>
 {% endif %}
{% endwith %}
{% block body %}{% endblock %}

{% block body %}
 h1>Overview/h1>
 p>Do you want to a href="{{ url_for('login') }}">log in?/a>
{% endblock %}

{% extends "layout.html" %}
{% block body %}
 h1>Login/h1>
 {% if error %}
 p class=error>strong>Error:/strong> {{ error }}
 {% endif %}
 form method=post>
 dl>
  dt>Username:
  dd>input type=text name=username value="{{
   request.form.username }}">
  dt>Password:
  dd>input type=password name=password>
 /dl>
 p>input type=submit value=Login>
 /form>
{% endblock %}

html>
head>
 title>File Upload/title>
/head>
body>
 form action="http://localhost:5000/uploader" method="POST" enctype="multipart/form-data">
  input type="file" name="file" accept=".jpg,.png" />
  input type="submit" />
 /form>
/body>
/html>

from flask import Flask, render_template, request
from werkzeug.utils import secure_filename
import os

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = '/Users/chenshifeng/upload/'

@app.route('/upload')
def upload_file():
 return render_template('upload.html')

@app.route('/uploader', methods = ['GET', 'POST'])
def uploader():
 if request.method == 'POST':
  f = request.files['file']
  f.save(os.path.join(app.config['UPLOAD_FOLDER'],secure_filename(f.filename)))
  return 'file uploaded successfully'

if __name__ == '__main__':
 app.run()

from flask_foo import [class, function]

from flask.ext import foo

import flaskext_compat
flaskext_compat.activate()
from flask.ext import foo

pip install Flask-Mail

flask-mail.Mail(app = None)

from flask import Flask
from flask_mail import Mail, Message

app =Flask(__name__)
mail=Mail(app)

app.config['MAIL_SERVER']='smtp.qq.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USERNAME'] = 'xxxxx@qq.com'
app.config['MAIL_PASSWORD'] = 'xxxxxxxx'
app.config['MAIL_USE_TLS'] = False
app.config['MAIL_USE_SSL'] = True
mail = Mail(app)

@app.route("/")
def index():
 msg = Message('Hello', sender = 'xxxxx@qq.com', recipients = ['xxxxx@qq.com'])
 msg.body = "Hello Flask message sent from Flask-Mail"
 mail.send(msg)
 return "Sent"

if __name__ == '__main__':
 app.run(debug = True)

pip install flask-sqlalchemy

from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///students.sqlite3'

db = SQLAlchemy(app)
class students(db.Model):
 id = db.Column('student_id', db.Integer, primary_key = True)
 name = db.Column(db.String(100))
 city = db.Column(db.String(50)) 
 addr = db.Column(db.String(200))
 pin = db.Column(db.String(10))

def __init__(self, name, city, addr,pin):
 self.name = name
 self.city = city
 self.addr = addr
 self.pin = pin

db.create_all()

Students.query.filter_by(city = 'Hyderabad').all()

@app.route('/')
def show_all():
 return render_template('show_all.html', students = students.query.all() )

!DOCTYPE html>
html lang = "en">
 head>/head>
 body>
  
  h3>
   a href = "{{ url_for('show_all') }}">Comments - Flask 
   SQLAlchemy example/a>
  /h3>
  
  hr/>
  {%- for message in get_flashed_messages() %}
   {{ message }}
  {%- endfor %}
		
  h3>Students (a href = "{{ url_for('new') }}">Add Student
   /a>)/h3>
  
  table>
   thead>
   tr>
    th>Name/th>
    th>City/th>
    th>Address/th>
    th>Pin/th>
   /tr>
   /thead>
   
   tbody>
   {% for student in students %}
    tr>
     td>{{ student.name }}/td>
     td>{{ student.city }}/td>
     td>{{ student.addr }}/td>
     td>{{ student.pin }}/td>
    /tr>
   {% endfor %}
   /tbody>
  /table>
  
 /body>
/html>

!DOCTYPE html>
html>
 body>
 
  h3>Students - Flask SQLAlchemy example/h3>
  hr/>
  
  {%- for category, message in get_flashed_messages(with_categories = true) %}
   div class = "alert alert-danger">
   {{ message }}
   /div>
  {%- endfor %}
  
  form action = "{{ request.path }}" method = "post">
   label for = "name">Name/label>br>
   input type = "text" name = "name" placeholder = "Name" />br>
   label for = "email">City/label>br>
   input type = "text" name = "city" placeholder = "city" />br>
   label for = "addr">addr/label>br>
   textarea name = "addr" placeholder = "addr">/textarea>br>
   label for = "PIN">PINCODE/label>br>
   input type = "text" name = "pin" placeholder = "pin" />br>
   input type = "submit" value = "Submit" />
  /form>
  
 /body>
/html>

@app.route('/new', methods = ['GET', 'POST'])
def new():
 if request.method == 'POST':
  if not request.form['name'] or not request.form['city'] or not request.form['addr']:
   flash('Please enter all the fields', 'error')
  else:
   student = students(request.form['name'], request.form['city'],
   request.form['addr'], request.form['pin'])
   
   db.session.add(student)
   db.session.commit()
   
   flash('Record was successfully added')
   return redirect(url_for('show_all'))
 return render_template('new.html')

from flask import Flask, request, flash, url_for, redirect, render_template
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///students.sqlite3'
app.config['SECRET_KEY'] = "random string"

db = SQLAlchemy(app)


class students(db.Model):
 id = db.Column('student_id', db.Integer, primary_key=True)
 name = db.Column(db.String(100))
 city = db.Column(db.String(50))
 addr = db.Column(db.String(200))
 pin = db.Column(db.String(10))


 def __init__(self, name, city, addr, pin):
  self.name = name
  self.city = city
  self.addr = addr
  self.pin = pin


@app.route('/')
def show_all():
 return render_template('show_all.html', students=students.query.all())


@app.route('/new', methods=['GET', 'POST'])
def new():
 if request.method == 'POST':
  if not request.form['name'] or not request.form['city'] or not request.form['addr']:
   flash('Please enter all the fields', 'error')
  else:
   student = students(request.form['name'], request.form['city'],
        request.form['addr'], request.form['pin'])

   db.session.add(student)
   db.session.commit()
   flash('Record was successfully added')
   return redirect(url_for('show_all'))
 return render_template('new.html')


if __name__ == '__main__':
 db.create_all()
 app.run(debug=True)