uget

Isomorphic JSON API helper on top of the Fetch API.

Usage

const uget = require('uget')

On the browser, the native Fetch API is used. On node, node-fetch is used. (via browserify)

uget(input, init)

Fetches a resource from a URI.

Parameters are the same as the native GlobalFetch.fetch function, but some defaults useful for JSON API endpoints are set for init:

• method = GET

• headers = { accept: 'application/json' }

  Can be used to distinguish between a JSON API request and a normal (HTML) request.

• credentials = same-origin

  Ensures that cookies are sent with the request.

• redirect = follow

  Follow redirects.

If you pass a plain object or an array to init.body, that will be serialized with JSON.stringify() and { 'content-type': 'application/json' } will be added to the default headers.

Returns:

A Promise that resolves with a value or rejects with an Error:

• If the response is not OK (does not have status 2xx):
  1. Parses the response body.
  • If the response body is valid JSON, attempts to get the message property and incorporates it into the error message.
  • If the response body is valid plaintext, gets the first hundred characters and incorporates it into the error message.
  2. Throws an error.
• If the response status is 204:
  • Returns undefined.
• Parses the response body as text
  • If the response body is empty, returns undefined.
  • Parses the response body text as JSON and returns it.

If the response is not OK and has a plaintext body, the error object will additionally have the payload property containing the response body. Furthermore, if it's valid JSON, the payloadJson property will be set containing the JSON object. Thirdly, if a message property was found, the payloadJsonDetail property will be set containing its value.