@aspectus/superagent-fetch
Version:
Custom fetcher that adapts [superagent](https://github.com/visionmedia/superagent) library to the default Fetch API.
48 lines (42 loc) • 1.78 kB
JavaScript
/*!
* superagent-fetch v0.10.10
* (c) 2020 Alex Tkachenko
* Released under the MIT License.
*/
import { partial, compose } from 'ramda';
import superagent from 'superagent';
import cancellablePromiseProxy from '@aspectus/cancellable-promise-proxy';
import progressPromiseProxy from '@aspectus/progress-promise-proxy';
var FOLLOW_REDIRECT = 'follow';
var nullHandler = function nullHandler() {
return null;
};
function createRequestFromFetch(agent, url) {
var init = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
var _init$method = init.method,
method = _init$method === void 0 ? 'GET' : _init$method,
_init$headers = init.headers,
headers = _init$headers === void 0 ? {} : _init$headers,
_init$redirect = init.redirect,
redirect = _init$redirect === void 0 ? FOLLOW_REDIRECT : _init$redirect,
body = init.body;
return agent(method, url).set(headers).redirects(redirect === FOLLOW_REDIRECT ? 5 : 0).send(body);
}
function makeRequest(agent, proxy, resource) {
var init = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
var request = createRequestFromFetch(agent, resource, init); // HACK: Forcing progress handling in superagent.
// With empty progress handlers list it would not subscribe on actual
// progress event at all.
request.on('progress', nullHandler);
return proxy(new Promise(function (resolve, reject) {
return request.then(resolve, reject);
}), {
request: request,
cancelController: request,
progressEmitter: request
});
}
var baseProxy = compose(cancellablePromiseProxy, progressPromiseProxy);
var main = partial(makeRequest, [superagent, baseProxy]);
export default main;
export { baseProxy, createRequestFromFetch, makeRequest };