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ThreadでFlaskを起動する

Last updated at Posted at 2022-03-11

やりたい事

  • WebUI用のFlaskとAPI用のFlaskを一つのアプリケーション内で実現したい。
  • プロセスを2つ立ち上げる方法もあるが、サブとなるAPI用をThreadで起動したい。
$ curl localhost:5001/
This is WebUI
$ curl localhost:5002/api/
This is api

ファイル構成

+ app.py
└ api
   └ views.py

コード

app.py
import threading
from flask import Flask


class APIThread(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.daemon = True

    def run(self):
        api_app = Flask(__name__)
        from api.views import api
        api_app.register_blueprint(api, url_prefix="/api")
        api_app.run(use_reloader=False, threaded=True, port=5002)


app = Flask(__name__)


@app.route('/')
def index():
    return "This is WebUI"


def main():
    thread = APIThread()
    thread.start()
    app.run(port=5001)


if __name__ == '__main__':
    main()
api/views.py
from flask import Blueprint

api = Blueprint("api", __name__)


@api.route('/')
def index():
    return "This is api"

https://ai-can-fly.hateblo.jp/entry/flask-directory-structure
https://www.subarunari.com/entry/2018/03/10/%E3%81%84%E3%81%BE%E3%81%95%E3%82%89%E3%81%AA%E3%81%8C%E3%82%89_Flask_%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6%E3%81%BE%E3%81%A8%E3%82%81%E3%82%8B_%E3%80%9CDebugger%E3%80%9C
https://news.mynavi.jp/techplus/article/python-33/
https://stackoverflow.com/questions/40460846/using-flask-inside-class
https://qiita.com/yaaamaaaguuu/items/486968e3b566f8340a9e

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