Flask to return image stored in database

Suppose i have the stored image path with me. The below code helps to send image through.

from flask import send_file
@app.route('/get_image')
def get_image():
    filename = 'uploads\\123.jpg'
    return send_file(filename, mimetype='image/jpg')

uploads is my folder name where my image with 123.jpg is present.

[PS: The uploads folder should be in the current directory as of the your script file]

Hope it helps.

Create a response object with the data and then set the content type header. Set the content disposition header to attachment if you want the browser to save the file instead of displaying it.

@app.route('/images/<int:pid>.jpg')
def get_image(pid):
    image_binary = read_image(pid)
    response = make_response(image_binary)
    response.headers.set('Content-Type', 'image/jpeg')
    response.headers.set(
        'Content-Disposition', 'attachment', filename='%s.jpg' % pid)
    return response

Relevant: werkzeug.Headers and flask.Response

You can pass a file-like object and the header arguments to send_file to let it set up the complete response. Use io.BytesIO for binary data:

return send_file(
    io.BytesIO(image_binary),
    mimetype='image/jpeg',
    as_attachment=True,
    download_name='%s.jpg' % pid)

Prior to Flask 2.0, download_name was called attachment_filename.

Just wanted to confirm that dav1d's second suggestion is correct - I tested this (where obj.logo is a mongoengine ImageField), works fine for me:

import io

from flask import current_app as app
from flask import send_file

from myproject import Obj

@app.route('/logo.png')
def logo():
    """Serves the logo image."""

    obj = Obj.objects.get(title='Logo')

    return send_file(
        io.BytesIO(obj.logo.read()),
        download_name='logo.png',
        mimetype='image/png'
    )

Easier than manually creating a Response object and settings its headers.

_{Prior to Flask 2.0, download_name was called attachment_filename.}