from flask import Flask

UPLOAD_FOLDER = 'C:/uploads'

app = Flask(__name__)

app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024

import os

import urllib.request

from app import app

from flask import Flask, request, redirect, jsonify

from werkzeug.utils import secure_filename

ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])

def allowed_file(filename):

return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

def upload_file():

if request.method == 'POST':

# check if the post request has the file part

if 'file' not in request.files:

resp = jsonify('No file part in the request')

resp.status_code = 500

return resp

file = request.files['file']

if file.filename == '':

resp = jsonify('No file selected for uploading')

resp.status_code = 500

return resp

if file and allowed_file(file.filename):

filename = secure_filename(file.filename)

file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))

resp = jsonify('File successfully uploaded')

resp.status_code = 200

return resp

else:

resp = jsonify('Allowed file types are txt, pdf, png, jpg, jpeg, gif')

resp.status_code = 500

return resp

if __name__ == "__main__":

app.run()

You can go through the tutorial https://www.roytuts.com/python-flask-rest-api-file-upload/