minicurso.py

from flask import Flask, request, send_from_directory, send_file
from PIL import Image, ImageFilter
from io import BytesIO
import os

app = Flask(__name__)

@app.route('/')
def index():
    return '<h1>Olá mundo</h1>'

@app.route('/upload', methods=['GET', 'POST'])
def upload():
    if request.method == 'POST':
        ofile = request.files['file']
        filedir = os.path.join(os.getcwd(), ofile.filename)
        ofile.save(filedir)
        return send_from_directory(os.getcwd(), ofile.filename)
    
    return '''
        <form enctype="multipart/form-data" action="/upload" method="post">
            <input type="file" name="file"/>
            <button type="submit">Enviar</button>
        </form>
    '''

@app.route('/gaussianblur', methods=['GET', 'POST'])
def gaussianblur():
    if request.method == 'POST':
        img = Image.open(request.files.get('image').stream)
        gaussian = img.filter(ImageFilter.GaussianBlur)
        bytes_image = BytesIO()
        gaussian.save(bytes_image, 'PNG', quality=70)
        bytes_image.seek(0)
        return send_file(bytes_image, mimetype='image/png')

    return '''
        <form enctype="multipart/form-data" action="/gaussianblur" method="post">
            <input type="file" name="image"/>
            <button type="submit">Enviar</button>
        </form>
    '''
if __name__ == '__main__':
    app.run(debug=True)