Python – 使用 Flask 模組建立 API

參考 – https://jeffwen0105.com/%E7%AC%AC%E4%B8%80%E6%AC%A1%E4%BD%BF%E7%94%A8-python-flask-restful-api-%E5%B0%B1%E4%B8%8A%E6%89%8B-get-%E6%96%B9%E6%B3%95/ 使用 Flask 模組物件提供的函數來建立 API(Application Programming Interface) .

測試環境為 CentOS 8 x86_64

所需套件 Flask

[root@localhost ~]# pip3 install Flask

API 程式:

[root@localhost ~]# vi api.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
    return "<h1>Hello , This a Restful Api Server by Flask...</h1>"

app.run(port=8088, debug=True)

程式說明 :

• from flask import Flask
  載入 Flask 套件.
• app = Flask(__name__)
  建利 Flask 物件.
• @app.route(“/”)
  def hello():
  return “<h1>Hello , This a Restful Api Server by Flask…</h1>”
  建立根目錄路由,這語法應該是 singledispatch decorator – https://benjr.tw/103440 之後我們可以依需求建立不同的目錄路由.
  該路由下只有一個 hello 函數(回傳 html 格式的資料).
• app.run(port=8088, debug=True)
  監聽 8088 埠 , 並使用除錯模式.

執行結果
伺服器端透過 Python 執行該程式.

[root@localhost ~]# python3 api.py
 * Serving Flask app '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
 * Running on http://127.0.0.1:8088/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 346-995-186

以下是在 Linux 下,透過 curl (文字版的遊覽器) 執行,來檢視一下 API : http://127.0.0.1:8088/

[root@localhost ~]# curl http://127.0.0.1:8088/ 
<h1>Hello , This a Restful Api Server by Flask...</h1>