Scheme of interaction between a mobile application and a website?

Question

Mobile development

Hello!
The situation is this. There is a site with user accounts where they can upload photos/videos, etc. The client wants to make a mobile application that will interact with the site, the user took a video or photo and uploads it to the site via the phone. The application will also remind the person that an action needs to be taken.
Tell me what should be implemented on the site side so that the mobile application can interact with the site. I would be grateful if you send links to articles that describe in detail the interaction scheme.

Answer 1

We need to make an API for interaction.
By login-password, issue a token for working with the API, which will need to be somehow attached to requests (in the header or in the request parameters).
Well, then just make a method that will receive the Stream of the file and already there decide what to do with it.
https://habrahabr.ru/company/mailru/blog/115163/