Sleek Networking, 🚀

A simple and efficient fetch wrapper that works across any Javascript (React/React Native/Vue JS, etc) app. It provides you with a clean and consistent way to call your Api, meanwhile handling JWT authentication, middlewares, etc.

Features

• JWT authentication
• Transparent absolute or relative url handling
• Request retry
• Middlewares
• Custom headers functions

Install

npm install --save @fidme/sleek-networking

or

yarn add @fidme/sleek-networking

Api wrapper

In order to use the Api across your app, you need to instantiate it with your configuration. Here are the params you may pass to it :

import { Api, Jwt } from "@fidme/sleek-networking";

const api = new Api({
  scheme: "http",
  retriesCount: 0,
  timeout: 1000,
  baseUrl: "google.fr/api/v1",
  afterEach: [(request) => {}],
  onError: [(error) => {}],
  headers: {
    "content-type": "Application/JSON",
    "X-Auth-Token": () => new Jwt("1234").generateToken(),
  },
});

Usage

api.get("posts", options);
api.post("posts", body, options);
api.put("posts", body, options);
api.delete("posts", options);

api.get("posts").then((res) => console.log(res));
/* 
Every request returns an object containing this format :
{ status: 200, body: { parsed: "JSON" }, header }
*/

By default, sleek-networking will assume you want to deal with JSON only. If you query a JSON endpoint, no need to parse it afterwards. If your Api returns something different from readable JSON, it will be returned as raw text.

If you want to send something different from Json, for example form data, you need to do the following :

const formData = new FormData();
formData.append("key", "value");

api.post("yourendpoint", formData, {
  headers: [("Content-Type": "multipart/form-data; boundary=----yourboundary")],
});

Providing JWT Header

With Sleek Networking it becomes easy to add JWT auth to your entire app. Simply import Jwt, provide your secret,

import { Jwt } from "@fidme/sleek-networking";

new Jwt(secret, optionalPayload, optionalHeader).generateToken(optionalPayload);

Retrying fetch request

In case your request fails (timeout or no network), you can provide a retriesCount option to your config, and also to a single request configuration like that :

api.get("posts", { retriesCount: 5 });

Middlewares

You can execute code after executing a request and before returning it to your app. In order to do so, provide your config with a list of afterEach: [() => {}] functions to execute.

Example use case, disconnecting a user after any 401 received

new Api({
  ...restOfConfigOptions,
  afterEach: [verifyAuthentication, doSomethingElse],
});

function verifyAuthentication(response) {
  if (response.status === 401) user.logout();
}

Custom header function

In case you need to execute a function to add a header to any HTTP request, you may provide a function to your header configuration.

For example that allows you to use any kind of authentication library (in case your do not like the included JWT 😁).

new Api({
  ...restOfConfigOptions,
  headers: {
    "Content-Type": "Application/JSON",
    "Custom-Request-Signature": (request) => functionToCallEverytime(),
    "X-Auth-Token": (request) => new Jwt("1234").generateToken(),
  },
});

If you need to visualize the request informations when processing your custom header function, you have a complete access to the Request object.

For example, say you need to add the HTTP method to the JWT payload, you can proceed like that :

'X-Auth-Token': request => new Jwt('1234').generateToken({ method: request.method }),
});

You can access anything related to the current Request including :

• request.url
• request.path
• request.method
• request.body
• request.options which is an object containing headers and other fetch/api options

Response handling

Instead of returning the default fetch response which contains only status and hard to access body informations, it returns a formatted response.

Methods	Description	Returns
succeeded	Check if status is between 200 and 300 and if there is no error.	boolean
bodyIfSucceeded	Return the body of the request if the status is between 200 and 300 else return false.	body or false
bodyOrThrow	Return the body of the request if the status is between 200 and 300 else throw a error.	body or throw
didNetworkFail	If the network request failed, return true or false	boolean
didServerFail	Tell you if you get error from the server.	boolean

Contribute

Please add consistent testing when contributing. Run tests with npm test.