@eclipse-ditto/ditto-javascript-client-dom/dist/dom/src/fetch-http.js

DOM implementation of Eclipse Ditto JavaScript API to be used in browsers.

/*!
 * Copyright (c) 2019 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 */
export class FetchRequester {
    doRequest(method, url, header, body) {
        return fetch(this.prepareRequest(method, url, header, body))
            .then(response => {
            const headers = new Map();
            response.headers.forEach((v, k) => headers.set(k, v));
            return response.json()
                .then(json => ({ headers, status: response.status, body: json }), () => ({ headers, status: response.status, body: undefined }));
        });
    }
    /**
     * Builds a Request object to perform a fetch request with.
     *
     * @param method - The type of action to perform.
     * @param url - The Url to send the request to.
     * @param header - The headers of the request.
     * @param body - The payload to send with the request.
     * @return the builder.
     */
    prepareRequest(method, url, header, body) {
        const headers = new Headers();
        header.forEach((v, k) => headers.append(k, v));
        return new Request(url, {
            headers,
            method,
            body,
            mode: 'cors'
        });
    }
}
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