HTTP POSTリクエストでPimoroni Inky Impressionの画像を書き換えるやつ

inky7api.py

#!/usr/bin/env python3
  
import sys

from PIL import Image
from inky.inky_uc8159 import Inky

from flask import Flask, request, Response

inky = Inky()
saturation = 0.5

ALLOWED_EXTENSIONS = {'jpg', 'png'}
app = Flask(__name__)

def allowed_file(filename):
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

@app.route('/upload', methods=['POST'])
def upload_file():
    code = 400
    # check if the post request has the file part
    if 'file' not in request.files:
        ret = 'No file part'
    file = request.files['file']
    if file and allowed_file(file.filename):
        try:
            image = Image.open(file)
            inky.set_image(image, saturation=saturation)
            inky.show()
            ret = 'upload success'
            code = 200
        except ValueError as e:
            ret = str(e)
    else:
        ret = 'Invalid file type'
    return Response(response=ret, status=code)

app.run(debug=False, host='0.0.0.0', port=7777)