Submitting Form Data with aiohttp in Python

When building web applications with the aiohttp library in Python, you'll often need to handle form data submitted from HTML forms. aiohttp makes this easy with some helpful tools for processing and validating user-entered form data.

Getting the Form Data

The first step is accessing the form data that was submitted. With aiohttp, this is available in the request object that is passed to route handlers:

async def handle_post(request):
    data = await request.post()

The post() method returns a dictionary with the form data. The keys are the names of the form fields, and the values are the submitted data.

You can also access files uploaded via the form with request.multipart(), which returns a MultipartReader.

Validating Form Data

Once you have the form data, validating user input is important. For example, check that required fields are entered and data formats are as expected.

The aiohttp library has some great validation tools like:

You can also leverage Python validation libraries like Pydantic to validate complex data.

Storing Form Data

After validation, you'll usually want to store or process the form data. For example, you could:

Be sure to properly handle any errors and provide user feedback!

In Summary

With these tips, you'll be a master at handling form data in aiohttp!