File download responses in Flask - Cheat Sheet & Quick Revision

Recall & Review

beginner

What Flask function is commonly used to send files for download?

The send_file() function is used in Flask to send files to the client, enabling file downloads.

beginner

How do you specify the filename that the user will see when downloading a file in Flask?

You use the download_name parameter in send_file() to set the filename shown to the user.

beginner

What parameter in send_file() forces the browser to download the file instead of displaying it?

Setting as_attachment=True in send_file() tells the browser to download the file as an attachment.

intermediate

Why is it important to set the correct MIME type when sending a file in Flask?

The MIME type tells the browser what kind of file it is. Setting it correctly helps the browser handle or display the file properly.

intermediate

How can you send a file stored in memory (like a BytesIO object) for download in Flask?

You can pass the in-memory file object directly to send_file() along with as_attachment=True and a download_name.

Which Flask function is used to send a file to the client for download?

A send_file()

B send_response()

C download_file()

D file_send()

The correct function to send files in Flask is send_file().

What parameter do you set to True in send_file() to force a file download?

A as_attachment=True

B download=True

C force_download=True

D attachment=True

Setting as_attachment=True forces the browser to download the file.

How do you specify the filename the user sees when downloading a file in Flask?

A name

B file_name

C filename

D download_name

The download_name parameter sets the filename shown to the user.

If you want to send a PDF file for download, which MIME type should you set?

A text/plain

B image/png

C application/pdf

D application/json

The correct MIME type for PDF files is application/pdf.

Can you use send_file() to send a file stored in memory (like BytesIO)?

A No, only files on disk can be sent

B Yes, by passing the in-memory file object

C Only if you convert it to a string first

D Only if you save it temporarily to disk

You can pass an in-memory file object like BytesIO directly to send_file().

Explain how to send a file for download in Flask including setting the filename and forcing download.

Think about the parameters in send_file() that control download behavior.

Describe why setting the correct MIME type is important when sending files in Flask.

Consider how browsers decide what to do with received files.