import os from flask import Flask, flash, request, redirect, url_for from werkzeug.utils import secure_filename UPLOAD_FOLDER = "/tmp/" ALLOWED_EXTENSIONS = {"txt", "pdf", "png", "jpg", "jpeg", "gif"} app = Flask(__name__) app.config["UPLOAD_FOLDER"] = UPLOAD_FOLDER def allowed_file(filename): return "." in filename and filename.rsplit(".", 1)[1].lower() in ALLOWED_EXTENSIONS @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: 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 == "": 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)) return redirect(url_for("uploaded_file", filename=filename)) return """