zFetch

node-fetch wrapper with some minor changes.

This library allows pre-configuring fetch requests per domain, allowing pre-configured headers and query parameters.

Key Differences

• Fetch methods accept a path instead of url
• QueryParams are passed in the fetch options as { queryParams: {} };
• Server errors causes the returned promise to be rejected.

Errors are returned as an Error object with a data property containing the server response. If a 'Content-Type' header with value 'application/json' is present in the the response header the data will automatically be parsed as an object.

Installation

Using npm:

npm install --save zfetch

Available methods

zFetch.createApi(apiName, baseUrl[, config])

• apiName (string): identifier name for the api
• baseUrl (string): url of the server to be reached (including protocol E.G. https://www.example.com/v1)
• config (object):

Property	Meaning
headers	Pre-configured headers (used for all subsequent requests)
queryParams	Pre-configured queryParams (used for all subsequent requests)

api.fetch(pathname[, options])

Resolves to the response object returned by node-fetch

api.fetchJSON(pathname[, options])

Resolves to an object parsed from the json returned by the server

api.fetchText(pathname[, options])

Resolves to an string containing the data in the response

Params:

• pathname (string): endpoint to be requested.
• options (object): all options from node-fetch options, plus queryParams option

Sample usage

const zFetch = require('zfetch');

const exampleApi = zFetch.createApi('example-api', 'https://www.example.com/', {
  headers: { 'X-Custom-Header': 'value' },
  queryParams: { customParam: 'XYZ' },
});

/**
 * Example using get method, headers and query parameters automatically included
 * GET https://www.example.com/examples/get?customParam=XYZ
 */
exampleApi.fetch('examples/get').then(/*...*/);
// or
exampleApi.fetchJSON('examples/get').then(/*...*/);
// or
exampleApi.fetchText('examples/get').then(/*...*/);

/**
 * Example using get method, headers and query parameters automatically
 * POST https://www.example.com/examples/post?customParam=XYZ
 */
exampleApi.fetch('examples/post', { method: 'POST', body: /*...*/ })
  .then(/*...*/);
// or
exampleApi.fetchJSON('examples/post', { method: 'POST', body: /*...*/ })
  .then(/*...*/);
// or
exampleApi.fetchText('examples/post', { method: 'POST', body: /*...*/ })
  .then(/*...*/);