React Native REST Client

Simplify the RESTful calls of your React Native app.

Instalation

npm install --save react-native-rest-client

Simple usage

Create your own api client by extending the RestClient class

import RestClient from 'react-native-rest-client';

export default class YourRestApi extends RestClient {
  constructor () {
    // Initialize with your base URL
    super('https://api.myawesomeservice.com');
  }
  // Now you can write your own methods easily
  login (username, password) {
    // Returns a Promise with the response.
    return this.POST('/auth', { username, password });
  }
  getCurrentUser () {
    // If the request is successful, you can return the expected object
    // instead of the whole response.
    return this.GET('/auth')
      .then(response => response.user);
  }
};

Then you can use your custom client like this

const api = new YourRestApi();
api.login('johndoe', 'p4$$w0rd')
  .then(response => response.token)   // Successfully logged in
  .then(token => saveToken(token))    // Remember your credentials
  .catch(err => alert(err.message));  // Catch any error

Advanced usage

import RestClient from 'react-native-rest-client';

export default class YourRestApi extends RestClient {
  constructor (authToken) {
    super('https://api.myawesomeservice.com', {
      headers: {
        // Include as many custom headers as you need
        Authorization: `JWT ${authToken}`
        // Content-Type: application/json
        // and
        // Accept: application/json
        // are added by default
      },
      // Simulate a slow connection on development by adding
      // a 2 second delay before each request.
      simulatedDelay: 2000
    });
  }
  getWeather (date) {
    // Send the url query as an object
    return this.GET('/weather', { date })
      .then(response => response.data);
  }
  checkIn (lat, lon) {
    return this.POST('/checkin', { lat, lon });
  }
};

Reference

super(baseUrl [, options])

You must call the parent constructor as shown in the example above.

Parameter	Type	Required	Default
baseUrl	String	Yes	undefined
options	Object	No	{}

options object

Supports the following values

Key	Type	Required	Default	Comments
headers	String	No	{}	Headers to be appended to the request. RestApi will always include Content-Type: application/json and Accept: application/json.
simulatedDelay	Number	No	0	Useful for simulating a slow connection. Number of milliseconds to wait before making the request. NOTE: in React Native apps it will only take effect while developing. It internally checks the DEV global variable to figure the environment. It won't delay requests in production.

this.GET(route [, query])

this.POST(route [, body])

this.PUT(route [, body])

this.DELETE(route [, query])

Each one of these methods returns a Promise with the response as the parameter.

Parameter	Type	Required	Default	Comments
route	String	Yes	''	Partial route to be appended to the baseUrl
query	Object	No	{}	Object to be encoded and appended as the query part to the URL
body	Object	No	{}	Data to be sent as the JSON body of the message

Limitations

• This library only supports JSON request and response bodies. If the response is not a JSON object, it will throw a JSON parse error.
• It is labeled as React Native, even when it has no RN dependencies and could (in theory) be used in any JavaScript project. The reason behind this is that the stack used (ES2015, fetch and the __DEV__ global variable) comes out of the box with React Native, and adding support for more platforms would require to add compilers, polyfills and other tricks, which are completely out of the scope of this library. If you know what you're doing though, feel free to tweak your stack and use this library.

License

MIT