82 lines
3.6 KiB
JavaScript
82 lines
3.6 KiB
JavaScript
import { Promise } from 'es6-promise'
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import fetchPonyfill from 'fetch-ponyfill'
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import { vsprintf } from 'sprintf-js'
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import formatText from './format_text'
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import stringifyAsQueryParam from './stringify_as_query_param'
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const fetch = fetchPonyfill(Promise)
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/**
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* imported from https://github.com/bigchaindb/js-utility-belt/
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*
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* Global fetch wrapper that adds some basic error handling and ease of use enhancements.
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* Considers any non-2xx response as an error.
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*
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* For more information on fetch, see https://developer.mozilla.org/en-US/docs/Web/API/GlobalFetch/fetch.
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*
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* Expects fetch to already be available (either in a ES6 environment, bundled through webpack, or
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* injected through a polyfill).
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*
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* @param {string} url Url to request. Can be specified as a sprintf format string (see
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* https://github.com/alexei/sprintf.js) that will be resolved using
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* `config.urlTemplateSpec`.
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* @param {object} config Additional configuration, mostly passed to fetch as its 'init' config
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* (see https://developer.mozilla.org/en-US/docs/Web/API/GlobalFetch/fetch#Parameters).
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* @param {*} config.jsonBody Json payload to the request. Will automatically be
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* JSON.stringify()-ed and override `config.body`.
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* @param {string|object} config.query Query parameter to append to the end of the url.
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* If specified as an object, keys will be
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* decamelized into snake case first.
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* @param {*[]|object} config.urlTemplateSpec Format spec to use to expand the url (see sprintf).
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* @param {*} config.* All other options are passed through to fetch.
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*
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* @return {Promise} Promise that will resolve with the response if its status was 2xx;
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* otherwise rejects with the response
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*/
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export default function baseRequest(url, { jsonBody, query, urlTemplateSpec, ...fetchConfig } = {}) {
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let expandedUrl = url
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if (urlTemplateSpec != null) {
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if (Array.isArray(urlTemplateSpec) && urlTemplateSpec.length) {
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// Use vsprintf for the array call signature
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expandedUrl = vsprintf(url, urlTemplateSpec)
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} else if (urlTemplateSpec &&
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typeof urlTemplateSpec === 'object' &&
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Object.keys(urlTemplateSpec).length) {
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expandedUrl = formatText(url, urlTemplateSpec)
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} else if (process.env.NODE_ENV !== 'production') {
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// eslint-disable-next-line no-console
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console.warn('Supplied urlTemplateSpec was not an array or object. Ignoring...')
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}
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}
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if (query != null) {
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if (typeof query === 'string') {
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expandedUrl += query
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} else if (query && typeof query === 'object') {
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expandedUrl += stringifyAsQueryParam(query)
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} else if (process.env.NODE_ENV !== 'production') {
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// eslint-disable-next-line no-console
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console.warn('Supplied query was not a string or object. Ignoring...')
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}
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}
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if (jsonBody != null) {
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fetchConfig.body = JSON.stringify(jsonBody)
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}
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return fetch.fetch(expandedUrl, fetchConfig)
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.then((res) => {
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// If status is not a 2xx (based on Response.ok), assume it's an error
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// See https://developer.mozilla.org/en-US/docs/Web/API/GlobalFetch/fetch
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if (!(res && res.ok)) {
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throw res
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}
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return res
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})
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}
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