Flask example

Using Flask to build a Restful API Server with Swagger document.

Integration with Flask-restplus, Flask-Cors, Flask-Testing, Flask-SQLalchemy,and Flask-OAuth extensions.

Extension:

• Restful: Flask-restplus

• SQL ORM: Flask-SQLalchemy

• Testing: Flask-Testing

• OAuth: Flask-OAuth

• ESDAO: elasticsearch , elasticsearch-dsl

Installation

Install with pip:

$ pip install -r requirements.txt

Flask Application Structure

.
|──────app/
| |────__init__.py
| |────api/
| | |────__init__.py
| | |────cve/
| | |────user/
| | |────oauth/
| |──────config.Development.cfg
| |──────config.Production.cfg
| |──────config.Testing.cfg
| |────dao/
| |────model/
| |────oauth/
| |────util/
|──────run.py
|──────tests/

Flask Configuration

Example

app = Flask(__name__)
app.config['DEBUG'] = True

Configuring From Files

Example Usage

app = Flask(__name__ )
app.config.from_pyfile('config.Development.cfg')

cfg example

##Flask settings
DEBUG = True  # True/False
TESTING = False

##SWAGGER settings
SWAGGER_DOC_URL = '/api'

....

Builtin Configuration Values

SERVER_NAME: the name and port number of the server.

JSON_SORT_KEYS : By default Flask will serialize JSON objects in a way that the keys are ordered.

• reference¶

OAuth Setup

add your client_id and client_secret into config file.

ESDAO Setup

add your ES host and ES port into config file

Run Flask

Run flask for develop

$ python webapp/run.py

In flask, Default port is 5000

Swagger document page: http://127.0.0.1:5000/api

Run flask for production

** Run with gunicorn **

In webapp/

$ gunicorn -w 4 -b 127.0.0.1:5000 run:app

• -w : number of worker
• -b : Socket to bind

Run with Docker

$ docker build -t flask-example .

$ docker run -p 5000:5000 --name flask-example flask-example 
 

In image building, the webapp folder will also add into the image

Unittest

$ nosetests webapp/ --with-cov --cover-html --cover-package=app

• --with-cov : test with coverage
• --cover-html: coverage report in html format

Reference

Offical Website

• Flask
• Flask Extension
• Flask restplus
• Flask-SQLalchemy
• Flask-OAuth
• elasticsearch-dsl
• gunicorn

Tutorial

• Flask Overview
• In Flask we trust

Wiki Page

Changelog

• Version 2.3 : add dockerfile
• Version 2.2 : add ESDAO module
• Version 2.1 : add OAuth extension: FLASK-OAuth, and google oauth example
• Version 2.0 : add SQL ORM extension: FLASK-SQLAlchemy
• Version 1.1 : update nosetest
• Version 1.0 : basic flask-example with Flask-Restplus, Flask-Tesintg