Building APIs with Node.js by Caio Ribeiro Pereira

By Caio Ribeiro Pereira

Presently, we are living in a interval within which the vast majority of clients use types of units to hook up with the net. the preferred units are smartphones, capsules and notebooks. constructing structures for various forms of units calls for the paintings of creating net companies, additionally identified by means of the identify of API (Application software Interface).

Basically, the APIs are back-end structures which are designed to paintings simply with facts in a centralized demeanour, permitting client-side functions to be built individually, to have a different interfaces to the ultimate person. those client-side functions tend to be cellular apps, computer functions or internet apps.

Since 2010 Node.js more and more proved to be a great platform to unravel many difficulties, specially for construction relaxation APIs. The single-thread structure that plays non-blocking I/O working on most sensible of JavaScript - that's a truly current language in all present browsers - confirmed sturdy functionality within the processing of many type of applications.

There are a few instances of enormous businesses, resembling LinkedIn and PayPal, which considerably kept expenditures with servers migrating a few of their tasks to Node.js.

In addition, one other good thing about utilizing the Node.js, which captivated many builders, is the low studying curve. in any case, who has labored with internet improvement have already got not less than a simple realizing of the JavaScript language.

In this e-book, you will examine in perform the best way to construct scalable APIs in Node.js platform via writing dependent codes utilizing ECMAScript 2015 (aka ES6) and a few renowned frameworks like exhibit, Passport, ApiDoc, Mocha, Helmet and more.

The venture may be built-in with a SQL database via Sequelize.js and, in any case, you will construct a unmarried web page program utilizing purely Vanilla JavaScript to consumes the API's information.

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Id; next(); }); }; Authenticating users 55 Generating tokens for authenticated users To finish the JWT authentication, we are going to prepare the model Users to be able to encrypt the user’s password. We also will create a route to generate tokens users who are going to authenticate themselves using their login and password on the system, and we’ll do a refactoring in the tasks and users routes so that their access properly use the id of a authenticated user. Doing this, we finish this authentication step, making our application reliable and safer.

FindAll() to his promises-based function provided by Sequelize. js adaptation into our API. To test it, just restart the server and go to the address: http://localhost:3000/tasks This time it is going to display a JSON object with empty tasks. 35 Working with SQL databases Now, the tasks list is empty! But don’t worry, in the next chapter we’ll implement the main endpoints to perform a complete CRUD in the API. So just keep reading! CRUDify API resources In this chapter, we’ll explore more the usage of the new functions from Sequelize and also organize the API’s routes and some middlewares of Express.

Js setup, let’s implement a sync simple function between Sequelize and database. This sync function performs, if necessary, alterations on database tables, according to what is going to be setup on the models. sync() function, to ensure this action will be executed before the server starts. get("port")}`); }); }); }; To test those modifications, restart the server. If everything is ok, your application must work as it was working before, after all, no visible modification was made, only some adjustments were made to establish a connection between the API and SQLite3.

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