REST API Stub with Flask
HTTP GET
By default Flask responds to GET.
Let us create the file
server.py
with the following code
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello Flask!"
if __name__ == "__main__":
app.run()
If you see a manual without a method specified, keep in mind that it will either respond only to GET, or the author has changed the default settings.
You can run the server.py file with the command
python server.py
But traditionally flask run is used, which I describe in the article «The First Flask Project» .
If Flask is installed in your environment you will see
* Serving Flask app "server" (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: off * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
You can open a browser and type http://127.0.0.1:5000/ into the address bar
The screen should show
Hello Flask!
And the console should show
127.0.0.1 - - [15/Jun/2020 16:19:06] "GET / HTTP/1.1" 200 - 127.0.0.1 - - [15/Jun/2020 16:19:07] "GET /favicon.ico HTTP/1.1" 404 -
404 - because I did not add a favicon.ico file
A Simple Web Server in Flask
Creating such an elementary server that responds to requests is sometimes
useful when you need to quickly test an application that, before
sending some important information, requests the state of the server.
You can answer 200 and then listen to what the application sends.
from flask import request
from flask import Flask
app = Flask(__name__)
@app.route('/')
def index():
return 'Hello world'
@app.route('/bestws')
def cakes():
return 'HeiHei.ru!'
@app.route('/heiheiru/holidays', methods = ['GET'])
def heiheiru_holidays():
timestamp = request.args.get('timestamp')
print(f"Someone made a GET request to heihei.ru and passed the time {timestamp}")
return '200'
@app.route('/heiheiru/fests', methods = ['GET','PUT', 'POST'])
def heiheiru_fests():
epc = request.args.get('epc')
print(epc)
antenna = request.args.get('antenna')
print(antenna)
timestamp = request.args.get('timestamp')
print(timestamp)
userMemory = request.args.get('userMemory')
print(userMemory)
return '200'
if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0')
Article author: Andrei Olegovich
