Flask-RESTful - Upload image

Question

I was wondering on how do you upload files by creating an API service?

class UploadImage(Resource):
    def post(self, fname):
        file = request.files[\         


        

Answer 1

from flask import Flask, url_for, send_from_directory, request
import logging, os
from werkzeug import secure_filename

app = Flask(__name__)
file_handler = logging.FileHandler('server.log')
app.logger.addHandler(file_handler)
app.logger.setLevel(logging.INFO)

PROJECT_HOME = os.path.dirname(os.path.realpath(__file__))
UPLOAD_FOLDER = '{}/uploads/'.format(PROJECT_HOME)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER


def create_new_folder(local_dir):
    newpath = local_dir
    if not os.path.exists(newpath):
        os.makedirs(newpath)
    return newpath

@app.route('/', methods = ['POST'])
def api_root():
    app.logger.info(PROJECT_HOME)
    if request.method == 'POST' and request.files['image']:
        app.logger.info(app.config['UPLOAD_FOLDER'])
        img = request.files['image']
        img_name = secure_filename(img.filename)
        create_new_folder(app.config['UPLOAD_FOLDER'])
        saved_path = os.path.join(app.config['UPLOAD_FOLDER'], img_name)
        app.logger.info("saving {}".format(saved_path))
        img.save(saved_path)
        return send_from_directory(app.config['UPLOAD_FOLDER'],img_name, as_attachment=True)
    else:
        return "Where is the image?"

if __name__ == '__main__':
    app.run(host='0.0.0.0', debug=False)

Here is a link

Answer 2

class UploadWavAPI(Resource):
    def post(self):
        parse = reqparse.RequestParser()
        parse.add_argument('audio', type=werkzeug.FileStorage, location='files')

        args = parse.parse_args()

        stream = args['audio'].stream
        wav_file = wave.open(stream, 'rb')
        signal = wav_file.readframes(-1)
        signal = np.fromstring(signal, 'Int16')
        fs = wav_file.getframerate()
        wav_file.close()

You should process the stream, if it was a wav, the code above works. For an image, you should store on the database or upload to AWS S3 or Google Storage

Answer 3

The following is enough to save the uploaded file:

from flask import Flask
from flask_restful import Resource, Api, reqparse
import werkzeug

class UploadImage(Resource):
   def post(self):
     parse = reqparse.RequestParser()
     parse.add_argument('file', type=werkzeug.datastructures.FileStorage, location='files')
     args = parse.parse_args()
     image_file = args['file']
     image_file.save("your_file_name.jpg")

Answer 4

you can use the request from flask

class UploadImage(Resource):
    def post(self, fname):
        file = request.files['file']
        if file and allowed_file(file.filename):
            # From flask uploading tutorial
            filename = secure_filename(file.filename)
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            return redirect(url_for('uploaded_file', filename=filename))
        else:
            # return error
            return {'False'}

http://flask.pocoo.org/docs/0.12/patterns/fileuploads/

Answer 5

Something on the lines of the following code should help.

 @app.route('/upload', methods=['GET', 'POST'])
 def upload():
    if request.method == 'POST':
        file = request.files['file']
        extension = os.path.splitext(file.filename)[1]
        f_name = str(uuid.uuid4()) + extension
        file.save(os.path.join(app.config['UPLOAD_FOLDER'], f_name))
        return json.dumps({'filename':f_name})