demo how to upload file with flask_restful api, and demo how to read both the uploaded file and the http fields with flask. The blog url: https://bswen.com/2021/03/others-how-to-upload-file-using-flask-restful-api.html

upload_file_demo.py

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

app = Flask(__name__)
api = Api(app)

UPLOAD_DIR="/Users/bswen/work/python/myutils/learn_flask/uploaded_files"

Books = {
    'book1': {'title': 'build an API'},
    'book2': {'title': 'test 1'},
    'book3': {'title': 'profit!'},
}


# shows a list of all books, and lets you POST to add new titles
class BookList(Resource):
    def __init__(self):
        self.parser = reqparse.RequestParser()

    def get(self):
        return Books

    def post(self):
        self.parser.add_argument("bookfile", type=werkzeug.datastructures.FileStorage, location='files')
        self.parser.add_argument('title')
        args = self.parser.parse_args()
        book_id = int(max(Books.keys()).lstrip('book')) + 1
        bookfile = args.get("bookfile")
        book_id = 'book%i' % book_id
        Books[book_id] = {'title': args['title']}
        bookfile.save(os.path.join(UPLOAD_DIR, bookfile.filename))
        return Books, 201


api.add_resource(BookList, '/books')


if __name__ == '__main__':
    app.run(debug=True, port=8080, host="0.0.0.0")

# curl -v -X POST -H "Content-Type: multipart/form-data" -F "title=aabb" -F "cbbfile=@test.zip" http://localhost:8080/books