Read e-book online Building APIs with Node.js PDF

February 14, 2018 | Javascript | By admin | 0 Comments

By Caio Ribeiro Pereira

Presently, we are living in a interval during which the vast majority of clients use types of units to connect with the web. the most well-liked units are smartphones, pills and notebooks. constructing platforms for various different types of units calls for the paintings of creating net providers, additionally recognized through the identify of API (Application application Interface).

Basically, the APIs are back-end platforms which are designed to paintings merely with info in a centralized demeanour, permitting client-side purposes to be constructed individually, to have a special interfaces to the ultimate person. those client-side purposes are usually cellular apps, laptop functions or internet apps.

Since 2010 Node.js more and more proved to be a great platform to unravel many difficulties, particularly 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 strong functionality within the processing of many form of applications.

There are a few circumstances of enormous businesses, akin to LinkedIn and PayPal, which considerably kept charges 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 spite of everything, who has labored with internet improvement have already got not less than a uncomplicated figuring out of the JavaScript language.

In this booklet, you are going to examine in perform how one can construct scalable APIs in Node.js platform via writing stylish codes utilizing ECMAScript 2015 (aka ES6) and a few well known frameworks like show, Passport, ApiDoc, Mocha, Helmet and more.

The undertaking should be built-in with a SQL database via Sequelize.js and, in spite of everything, you will construct a unmarried web page program utilizing merely Vanilla JavaScript to consumes the API's info.

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To simplify our examples, we are going to use SQLite3. It is preinstalled database on Linux, Unix and MacOSX, so there’s no need to set it up. sqlite extension’s file. It has an interface based on SQL language very similar to other databases and is present not only on desktop systems but on mobile applications as well. js, there are several frameworks that works with SQLite3. js module, which is a complete module and has a nice interface and is very easy to work. On it, it is possible to manipulate data using SQL commands (or not) and it also supports the main SQL databases, such as: Postgres, MariaDB, MySQL, SQL Server and SQLite3.

This is the value of the params variable, which in this case, there is no need to include parameters to filter the tasks list. The callback of this function returns the tasks variable, which was created to return, for while, some static values from his model. So, at this point, we are sure that tasks is going to return an static array with some tasks descriptions. To finish these refactorings, let’s create a file, which is going to load all the middlewares and specific settings of Express. set("json spaces", 4).

Listing tasks via GET We already have a basic middleware for treating all the task’s resources, now let’s implement some CRUD functions, step-by-step. findAll({}). Although it is a bad practice to list all data, we are only using it for didactic matters. But chill out that throughout the chapters some arguments will be implemented to make this list of tasks more specific. The search results occurs via then() function and if any problem happens, you can handle them via catch() function. An important detail about API’s development is to treat all or the most important results using the correct HTTP status code, in this case a successful result will return by default the 200 OK status.

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Building APIs with Node.js by Caio Ribeiro Pereira


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