uppy/examples/python-xhr/server.py

import os
from flask import Flask, request, jsonify
from werkzeug.utils import secure_filename
from flask_cors import CORS

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

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
CORS(app)

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

@app.route('/upload', methods=['POST'])
def upload_file():
    if request.method == 'POST':
        # check if the post request has the file part
        print request.files
        if len(request.files) == 0:
          return jsonify(
              error="No file n request"
            ), 400
        for fi in request.files:            
          file = request.files[fi]
          if file and allowed_file(file.filename):
              filename = secure_filename(file.filename)
              file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
              return jsonify(
                message="ok"
              ), 201
if __name__ == '__main__':
   app.run(port=3020)