Serving uploaded files in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the function used to send files in Flask.

Flask

from flask import Flask, [1]

Drag options to blanks, or click blank then click option'

Asend_file

Brender_template

Crequest

Dredirect

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'render_template' instead of 'send_file'.

Forgetting to import 'send_file' at all.

The send_file function is used to send files from the server to the client in Flask.

2fill in blank

medium

Complete the route function to send a file named 'example.txt' from the 'uploads' folder.

Flask

from flask import send_file

@app.route('/download')
def download():
    return send_file('[1]')

Drag options to blanks, or click blank then click option'

A'static/example.txt'

B'example.txt'

C'uploads/example.txt'

D'/example.txt'

Attempts:

3 left

💡 Hint

Common Mistakes

Using just the filename without folder path.

Using the wrong folder like 'static'.

The file path must include the folder where the file is stored, here 'uploads/example.txt'.

3fill in blank

hard

Fix the error in the code to correctly send a file with a custom download name.

Flask

return send_file('uploads/report.pdf', [1]='monthly_report.pdf')

Drag options to blanks, or click blank then click option'

Afile_name

Bfilename

Cattachment_filename

Ddownload_name

Attempts:

3 left

💡 Hint

Common Mistakes

Using the old argument 'attachment_filename' which is deprecated.

Using incorrect argument names like 'filename' or 'file_name'.

In Flask 2.0+, the correct argument to set the download filename is download_name.

4fill in blank

hard

Fill both blanks to send a file as an attachment with the correct MIME type.

Flask

return send_file('uploads/image.png', [1]=True, [2]='image/png')

Drag options to blanks, or click blank then click option'

Aas_attachment

Bmimetype

Cdownload_name

Dattachment

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'attachment' instead of 'as_attachment'.

Confusing 'mimetype' with 'download_name'.

as_attachment=True forces download, and mimetype sets the file type.

5fill in blank

hard

Fill all three blanks to serve an uploaded file securely using 'send_from_directory'.

Flask

from flask import send_from_directory

@app.route('/uploads/<filename>')
def uploaded_file(filename):
    return send_from_directory([1], [2], [3]=True)

Drag options to blanks, or click blank then click option'

A'uploads'

Bfilename

Cas_attachment

D'static'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'static' folder instead of 'uploads'.

Passing filename as a string instead of variable.

Omitting 'as_attachment=True' causing inline display.

send_from_directory needs the folder, the filename, and as_attachment=True to serve files for download.