HTTP methods (GET, POST, PUT, DELETE) in Flask - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the GET HTTP method do?

GET requests data from a server. It asks the server to send back information without changing anything.

beginner

How is the POST HTTP method used in Flask?

POST sends data to the server to create something new, like submitting a form. In Flask, you handle POST requests to receive and process this data.

intermediate

What is the purpose of the PUT HTTP method?

PUT updates existing data on the server. It replaces the current version of a resource with the new data sent.

beginner

Explain the DELETE HTTP method.

DELETE removes data from the server. When you send a DELETE request, you ask the server to delete a specific resource.

intermediate

How do you specify allowed HTTP methods in a Flask route?

You use the methods parameter in the @app.route decorator, like @app.route('/path', methods=['GET', 'POST']). This tells Flask which HTTP methods the route accepts.

Which HTTP method is typically used to retrieve data without changing it?

A GET

B POST

C PUT

D DELETE

GET requests data from the server without modifying it.

In Flask, how do you handle a form submission that creates new data?

A Use a GET request

B Use a PUT request

C Use a DELETE request

D Use a POST request

POST is used to send data to the server to create new resources.

Which HTTP method replaces an existing resource with new data?

A PUT

B POST

C GET

D DELETE

PUT updates or replaces an existing resource on the server.

What does the DELETE HTTP method do?

A Retrieves data

B Removes data

C Updates data

D Creates new data

DELETE removes a resource from the server.

How do you allow both GET and POST methods on a Flask route?

A @app.route('/path', methods=['POST'])

B @app.route('/path', methods=['GET'])

C @app.route('/path', methods=['GET', 'POST'])

D @app.route('/path')

You specify allowed methods with the methods list in the route decorator.

Describe the main purpose of each HTTP method: GET, POST, PUT, and DELETE.

Think about what each method does to data on the server.

Explain how to handle different HTTP methods in a Flask route and why it matters.

Consider how a web form submission differs from just loading a page.