How to capture the current domain name in a Flask application

To capture the current domain name in a Flask application, you can use the request object provided by Flask. Here’s an example:

from flask import Flask, request

app = Flask(__name__)

@app.route('/')
def index():
    domain_name = request.environ['HTTP_HOST']
    return "The current domain is: {}".format(domain_name)

In this example, we define a route function called index that retrieves the current domain name using request.environ['HTTP_HOST']. We then use the retrieved domain name and return it as a string in the HTTP response.

Note that the environ attribute of the request object contains the WSGI environment dictionary, which is a standard way for web servers to pass information about an HTTP request to a web application. The HTTP_HOST key in environ contains the current domain name.