Scopes in hapi can be used to set up and implement basic access restriction. The linked tutorial provides the details if you want to get started with scopes. This tutorial shows you how to take scopes to the next level by using dynamic request properties like query or path parameters …

In an advanced development state, you want to make use of request headers and because you don’t blindly trust the incoming values, you also apply validation rules. With hapi, you’ve a framework that has validation built into its core and makes it easy to define rules for request …

Every app developer has been in this scenario: the API has a weird or problematic behavior, but the backend developer or evil boss decides to fix it by a hack on the mobile app, instead of getting down to the root of the problem. In our introduction to response caching …

Internet servers and browsers have developed an advanced caching system to reduce the used bandwidth and make viewing websites much faster. However, when developing mobile apps we started to forget about these things. While image libraries like Picasso or Glide provide caching when loading and displaying images, Retrofit does not …

Access control to individual routes in hapi can be easily implemented using scopes. If you’re new to the concept of scopes, please head over to the introductory tutorial on how to restrict access with scopes in hapi. In this tutorial you’ll change the response for insufficient scopes from …

Building an application that allows users to sign up for your platform always involves authentication and some kind of authorization. You may have dedicated administration areas where „normal“ users shouldn’t have access to. With hapi you can build on a great feature: scopes. Scopes are part of the authentication …

In a previous tutorial you've learned how to download files with Retrofit. Depending on the use case and size of the file, you should consider displaying a download progress to the user. Your users appreciate seeing an informative download status view, instead of being in the dark and not knowing …

In a previous tutorial, you've learned how to log requests and responses in Retrofit using an OkHttp interceptor. The interceptor is set up in a few minutes, but has the disadvantage of logging everything to the Android log, which is not the easiest way to access the complex information. In …