Asynchronous flask mail

Asynchronous Flask Mail!

In Flask, you can use the async and await keywords to send emails asynchronously using the Flask-Mail extension. Here's an example:

Step 1: Install Flask-Mail

First, install Flask-Mail using pip:

pip install flask-mail

Step 2: Configure Flask-Mail

In your Flask app, configure Flask-Mail by creating a mail object and setting up the email settings:

from flask import Flask
from flask_mail import Mail, Message

app = Flask(__name__)
app.config['MAIL_SERVER'] = 'smtp.gmail.com'
app.config['MAIL_PORT'] = 587
app.config['MAIL_USE_TLS'] = True
app.config['MAIL_USERNAME'] = '[email protected]'
app.config['MAIL_PASSWORD'] = 'your_password'

mail = Mail(app)

Step 3: Send an email asynchronously

To send an email asynchronously, you can use the async and await keywords to create a coroutine that sends the email:

from flask import request
from flask_mail import Message

@app.route('/send_email', methods=['POST'])
async def send_email():
    msg = Message('Hello', sender='[email protected]', recipients=['[email protected]'])
    msg.body = 'This is the email body'
    await mail.send(msg)
    return 'Email sent!'

In this example, the send_email function is decorated with @app.route to make it a Flask route. The function takes a POST request and sends an email using the mail object. The await keyword is used to wait for the email to be sent asynchronously.

Step 4: Run the Flask app

Run the Flask app using the following command:

python app.py

Step 5: Test the email sending

Use a tool like curl to send a POST request to the /send_email route:

curl -X POST -H "Content-Type: application/json" http://localhost:5000/send_email

This should send an email asynchronously using Flask-Mail.

Tips and Variations

• You can use the async and await keywords with other Flask-Mail methods, such as send_async or send_deferred.
• You can use a library like aiohttp to send emails asynchronously using HTTP requests.
• You can use a library like celery to send emails asynchronously using a message broker.

By using asynchronous email sending with Flask-Mail, you can improve the performance and scalability of your Flask app by offloading email sending to a separate thread or process.