threadshare / flask-demos

flask demos

Flask Demo

v0.1

$ git checkout v0.1

一个最简单的 demo：

# -*- coding: utf-8 -*-

from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
    return "Hello World!"

if __name__ == "__main__":
    app.run(host='127.0.0.1', port=5200, debug=True)

v0.2

$ git checkout v0.2

# -*- coding: utf-8 -*-

from flask import Flask, request, redirect, url_for

app = Flask(__name__)
app.secret_key = 'some secret key'

books = ['the first book', 'the second book', 'the third book']


@app.route("/")
def index():
    render_string = '<ul>'

    for book in books:
        render_string += '<li>' + book + '</li>'

    render_string += '</ul>'

    return render_string

@app.route("/book", methods=['POST', 'GET'])
def book():
    _form = request.form

    if request.method == 'POST':
        title = _form["title"]
        books.append(title)
        return redirect(url_for('index'))

    return '''
        <form name="book" action="/book" method="post">
            <input id="title" name="title" type="text" placeholder="add book">
            <button type="submit">Submit</button>
        </form>
        '''

if __name__ == "__main__":
    app.run(host='127.0.0.1', port=5200, debug=True)

v0.3

$ git checkout v0.3

加入蓝图功能，代码结构如下：

flask-demos
├── README.md
├── app.py
├── book
│   ├── __init__.py
│   └── book.py
├── movie
│   ├── __init__.py
│   └── movie.py
└── templates
    ├── 404.html
    ├── book.html
    ├── layout.html
    └── movie.html

通过 python app.py 运行。

v0.4

$ git checkout v0.3

加入密码和 token 认证，只有登录成功的用户才可以提交书籍，其中，token 认证可使用命令行 curl 测试。

# 密码认证
curl -i -u ethan:6667 -d "title=mybook" -X POST http://127.0.0.1:5200/book

# token 认证
curl -i -u token:x -d "title=threee" -X POST http://127.0.0.1:5200/book

v0.5

$ git checkout v0.5

采用工厂方法 creat_app() 创建 app 对象。

代码结构如下：

.
├── app.py
├── book
│   ├── __init__.py
│   └── book.py
├── configs.py
├── movie
│   ├── __init__.py
│   └── movie.py
├── requirements.txt
├── run.py
└── templates
    ├── 404.html
    ├── book.html
    ├── layout.html
    └── movie.html

运行：

$ python run.py