Created
December 5, 2019 11:39
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flask image scale using PIL
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| import os | |
| from flask import Flask, flash, request, redirect, url_for | |
| from werkzeug.utils import secure_filename | |
| from flask import send_from_directory | |
| UPLOAD_FOLDER = '/tmp/' | |
| ALLOWED_EXTENSIONS = { 'png', 'jpg', 'jpeg', 'gif'} | |
| app = Flask(__name__) | |
| app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER | |
| app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024 | |
| from PIL import Image | |
| @app.route('/uploads/<filename>') | |
| def uploaded_file(filename): | |
| return send_from_directory(app.config['UPLOAD_FOLDER'], | |
| filename) | |
| def allowed_file(filename): | |
| return '.' in filename and \ | |
| filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS | |
| def scale_image(filename): | |
| img = Image.open(filename) | |
| img.thumbnail((256,256), Image.ANTIALIAS) | |
| path = filename[:filename.rfind("/")+1] | |
| name = filename[filename.rfind("/")+1:] | |
| img.save(path + "thumb_" + name) | |
| return "thumb_" + name | |
| @app.route('/', methods=['GET', 'POST']) | |
| def upload_file(): | |
| if request.method == 'POST': | |
| # check if the post request has the file part | |
| if 'file' not in request.files: | |
| flash('No file part') | |
| return redirect(request.url) | |
| file = request.files['file'] | |
| # if user does not select file, browser also | |
| # submit an empty part without filename | |
| if file.filename == '': | |
| flash('No selected file') | |
| return redirect(request.url) | |
| if file and allowed_file(file.filename): | |
| filename = secure_filename(file.filename) | |
| file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) | |
| newname = scale_image(os.path.join(app.config['UPLOAD_FOLDER'], filename)) | |
| return redirect(url_for('uploaded_file', | |
| filename=newname)) | |
| return ''' | |
| <!doctype html> | |
| <title>Upload new File</title> | |
| <h1>Upload new File</h1> | |
| <form method=post enctype=multipart/form-data> | |
| <input type=file name=file> | |
| <input type=submit value=Upload> | |
| </form> | |
| ''' |
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