Python Flaskを使ってREST APIを作成する

pip install flask flask_restful

python flask_api.py

$ python flask_api.py 
 * Serving Flask app "flask_api" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 280-531-524
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

$ curl localhost:5000?name='Taro'\&age=88
{
    "name": "Hello Taro!",
    "age": 88
}

$ curl -i localhost:5000
HTTP/1.0 400 BAD REQUEST
Content-Type: application/json
Content-Length: 67
Server: Werkzeug/1.0.1 Python/3.6.4
Date: Mon, 04 May 2020 15:00:57 GMT

{
    "message": {
        "name": "Name cannot be blank!"
    }
}

$ curl -i localhost:5000?name=
HTTP/1.0 401 UNAUTHORIZED
Content-Type: application/json
Content-Length: 43
Server: Werkzeug/1.0.1 Python/3.6.4
Date: Mon, 04 May 2020 15:06:03 GMT

{
    "message": {
        "name": "Name cannot be blank! 2"
    }
}

$ curl -i localhost:5000?name='Taro'\&age=aaa
HTTP/1.0 400 BAD REQUEST
Content-Type: application/json
Content-Length: 68
Server: Werkzeug/1.0.1 Python/3.6.4
Date: Mon, 04 May 2020 15:08:52 GMT

{
    "message": {
        "age": "Age cannot be converted"
    }
}

$ curl -X POST localhost:5000?q_param=100 -d f_param=form_parameter
{
    "post": "Hello World!",
    "qParam": 100,
    "fParam": "form_parameter"
}

$ curl -X POST localhost:5000?q_param=query -d f_param=form_parameter
{
    "message": {
        "q_param": "q_param is numbers"
    }
}