How to return images in flask response?

Question

As an example, this URL:

http://example.com/get_image?type=1

should return a response with a image/gif MIME type. I have two static .gif images,
and if type is 1, it should return ok.gif, else return error.gif. How to do that in flask?

Martin Geisler · Accepted Answer · 2012-11-09 10:52:53Z

264

You use something like

from flask import send_file

@app.route('/get_image')
def get_image():
    if request.args.get('type') == '1':
       filename = 'ok.gif'
    else:
       filename = 'error.gif'
    return send_file(filename, mimetype='image/gif')

to send back ok.gif or error.gif, depending on the type query parameter. See the documentation for the send_file function and the request object for more information.

edited Nov 9, 2012 at 10:52

answered Dec 26, 2011 at 15:56

Martin Geisler

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6 Comments

David V. Over a year ago

any idea how to do that with flask-restful ?

Arindam Roychowdhury Over a year ago

@DavidV. I am trying the same thing. I am going to use an alternate for now. Save the response as a png file and somehow create a URL for that . Then embed that URL in my html page.

Dhanapal Over a year ago

how do i send multiple gifs as return here?

Vaulstein Over a year ago

It is worth nothing that send_file is an insecure method of sending files, which does not do any sanity checks and is not recommended if sanity checks are handled in your code. More information can be found on this answer

Oleksiï Nikonov Over a year ago

what is the path of an image should i write? should i specify the path from the root directory: filename = './flaskapp/assets/imgs/ok.gif' ?

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