The simplest server configuration for your AWS Amplify / Cognito App

The authentication, in a mobile or web app, is one of the most important aspects, both on the business and on the technical side. Once you have the authentication layer, in which you know exactly who is accessing to your server’s resources, you can add the authorization layer, that makes possible to decide if a specific user can access to a specific resource.

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How to get Facebook user real time gps coordinates by exploiting Nearby Friends

Nearby Friends by Facebook is a nice feature. It makes possible to get in contact with your friends near you from a geographic point of view. But what if it also makes possible to track the specific user’s GPS coordinates in real time? Facebook knows our position at any time, it could not be important, but when a third party could get the same, it is not a great deal.

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React Native — How to debug an app without the debugger turned on

You don’t always want the debugger turned on because in some cases it makes the whole process very slow. To get real time info from the app you can just use console.warn: console.warn(whatever_you_wanna_show); Essentially, console.warn prints out the yellow horizontal sections you often see in your app.

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Facebook Graph API — How to get FB id, name, email and picture by using the access token only

After the Facebook Login you get an access token by Facebook. To turn your access token into consumable data you just need to create a GET request with the following URL: https://graph.facebook.com/me?access_token=<your-fb-token>&fields=id,name,email,picture.width(640).height(640) The important aspect of me after graph.facebook.com is that you just need the token, not the explicit Facebook ID. This is useful in social authentication pipelines.

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Javascript - How to generate a JWT token with jsonwebtoken

The library ‘jsonwebtoken’ is a popular way to create and verify a JWT token. That’s how to use it synchronously: import { sign } from 'jsonwebtoken'; const token = sign( { yourData: whateverYouWant }, // your payload yourSecret, { algorithm: 'HS256' });If you want to use it asynchronously you can use a callback:

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Docker & Docker-Compose — How to open a terminal of a running container

If you have a Docker-Compose project, and you want a terminal on one of your containers, you just need to enter: docker-compose exec <your-service-name> sh or docker-compose exec <your-service-name> /bin/bash IMPORTANT -> To make it works you need to start your service: docker-compose up

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My short experience with DGraph as of Jan 2020

When it comes to develop a graph oriented system like a social network, or an analytics system or anything in which the structure is essentially a graph, you feel uncomfortable on working with the good, old SQL. This common feeling led to the rise of graph databases starting from Neo4J and going with the latest ones, among which Amazon Neptune (Graph Database as a Service) launched in 2017, ArangoDB and many others. I am not a graph database expert, neither a database expert in general, but for my projects I need to know how to use them. Based on my needs, I skipped a few databases like Neo4J and MongoDB.

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Lavoro all'estero e tasse in Italia: La Guida

Quando ci si trasferisce all’estero a lavorare c’è sempre molta confusione su quali imposte versare e a chi versarle per non pagare due volte oppure per non incorrere in sanzioni. Se non sei iscritto all’AIRE o ti sei iscritto solo recentemente, devi assolutamente leggere questo articolo.

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