Redirect and abort functions in Flask - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the redirect() function do in Flask?

The redirect() function sends the user to a different URL. It tells the browser to load a new page, like when you click a link.

beginner

How do you use the abort() function in Flask?

You call abort() with an HTTP status code (like 404) to stop the request and show an error page. It’s like saying "Stop! This page is not found."

intermediate

What HTTP status code does redirect() usually use by default?

By default, redirect() uses status code 302, which means "Found" or "Temporary Redirect." It tells the browser to go to the new URL temporarily.

beginner

What happens if you call abort(404) in a Flask route?

Flask stops running the route and sends a 404 Not Found error page to the user. This means the page does not exist.

intermediate

Can you customize the error page shown by abort() in Flask?

Yes! You can create custom error handlers for codes like 404 or 500 to show friendly messages or pages instead of the default error page.

What does redirect('/home') do in a Flask app?

A Reloads the current page

B Stops the app with an error

C Sends the user to the '/home' URL

D Deletes the '/home' route

redirect('/home') tells the browser to go to the '/home' page.

Which function stops a Flask route and shows an error page?

A abort()

B redirect()

C render_template()

D url_for()

abort() stops the route and sends an error response.

What HTTP status code is commonly used by abort(404)?

A 200

B 404

C 302

D 500

abort(404) sends a 404 Not Found error.

Which status code does redirect() use by default?

A 302

B 500

C 404

D 301

Default redirect status code is 302 (Temporary Redirect).

How can you show a custom error page for abort(404) in Flask?

A Change the route URL

B Use <code>redirect()</code>

C Call <code>abort()</code> again

D Create an error handler for 404

Custom error handlers let you show friendly pages for errors.

Explain how and why you would use the redirect() function in a Flask app.

Think about when you want to send someone to a different page after an action.

Describe the purpose of the abort() function and how it affects the user experience in Flask.

Consider what happens when a page is not found or access is denied.