Skip to content

Instantly share code, notes, and snippets.

@Miserlou

Miserlou/flask_binary.py

Created February 17, 2017 19:07
Show Gist options
  • Save Miserlou/fcf0e9410364d98a853cb7ff42efd35a to your computer and use it in GitHub Desktop.
Save Miserlou/fcf0e9410364d98a853cb7ff42efd35a to your computer and use it in GitHub Desktop.
Download ZIP
Flask serving binary data example
Raw
flask_binary.py
import io
from flask import Flask, send_file
app = Flask(__name__)
@app.route('/logo.jpg')
def logo():
"""Serves the logo image."""
with open("logo.jpg", 'rb') as bites:
return send_file(
io.BytesIO(bites.read()),
attachment_filename='logo.jpeg',
mimetype='image/jpg'
)
@mattmess1221
Copy link

@kirpit He would have to get rid of the with statement. It closes the stream before it's used.

@carvendy
Copy link

image
I don't want to download image, Can online show the image?

@sarvarxyz
Copy link

sarvarxyz commented Mar 29, 2019 •
edited
Loading

@carvendy
http://flask.pocoo.org/snippets/118/

@FelixWeichselgartner
Copy link

I had to add as_attachment=True to send_file to get it to work.
But thanks!

@R1234A
Copy link

R1234A commented Oct 10, 2020

Hi!! Thanks for the code!!
I have a similar code in which multiple files are uploaded and then after processing, I have a string name "b64_encoded_string" as output now this has not to be saved anywhere but to return that string to the web app and download there as .pem file. Earlier I was using without flask and saving it via - pickle.dump( b64_encoded_string, open("license.pem", "wb")).

Instead, I don't want to save anything in the web app and push all the string and download it for the user as .pem file in-app.

If anybody can help me with this, it would be a great help.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment