py 2.7-3.6:

Generate Swagger API representations from Flask Classy views.

Flask-Classy-Swagger aims to allow you to generate a swagger representation of your API without writing anything specific to it. It uses the code and documentation you already have (by introspecting methods) and does not add its own markup language to define swagger-specific metadata. It's even compatible (but slightly less useful) with normal non-Flask-Classy Flask endpoints.

This is an alpha-version work in progress! Most swagger features are not yet supported and the format and requirements might change.

Put this in a file, e.g. app.py:

from flask import Flask
from flask_classy import FlaskView
from flask_classy_swagger import swaggerify


class BaloonsView(FlaskView):
    """I love balloons"""

    def get(self, balloon_id):
        """Bloons!

        Get all your balloons here.

        """
        return balloon_id


app = Flask(__name__)
BaloonsView.register(app)
swaggerify(app, 'BalloonApp', '0.1.0', swagger_path='/swagger.json')


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

Run the server:

$ python app.py
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

Curl it:

$ curl http://127.0.0.1:5000/swagger.json
{
  "info": {
    "title": "BalloonApp",
    "version": "0.1.0"
  },
  "paths": {
    "/baloons/{balloon_id}": {
      "get": {
        "description": "Get all your balloons here.",
        "parameters": [
          {
            "in": "path",
            "name": "balloon_id",
            "required": true,
            "type": "string"
          }
        ],
        "summary": "Bloons!",
        "tags": [
          "BaloonsView"
        ]
      }
    }
  },
  "swagger": "2.0",
  "tags": [
    {
      "description": "I love balloons",
      "name": "BaloonsView"
    }
  ]
}

Taken from the original class's docstring:

class Balloons(FlaskView):
    """This here!"""
    def index(self):
        return []

becomes:

"tags": [
    {
      "description": "This here!",
      "name": "BaloonsView"
    }
  ]

Taken from the original method's docstring:

class Balloons(FlaskView):
    def post(self, balloon):
        """The first line is the summary!

        All the rest goes in the description.
        """
        return balloon

becomes:

...
"/balloons/{balloon}": {
    "post": {
        "summary": "The first line is the summary!",
        "description":
        "All the rest goes in the description.",
        ...
}}

Path parameters are taken from the Flask app's urlmap and the Flask-Classy method where they were defined. They are marked as required or not based on whether they are args or kwargs in the original method. The only way to specify the type of a parameter currently is with werkzeug's converter format:

class Balloons(FlaskView):
    route_base = '/<int:balloon_id>/balloon'

    def put(self, balloon_id, color='red'):
        return

becomes:

...
{"/{balloon_id}/balloon/{color}":
    {"put":
        {"parameters": [
             {
                "name": "balloon_id",
                "in": "path",
                "type": "integer",
                "format": "int32",
                "required": true},
             {
                 "name": "color",
                 "in": "path",
                 "type": "string",
                 "required": false}]}}}
...

$ pip install --requirement requirements-dev.txt
$ py.test tests

Copyright (c) 2015-2016, Ionuț Arțăriși

Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE