TelemetryService.js

/*******************************************************************************
 * Copyright (c) 2019 Dortmund University of Applied Sciences and Arts and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Dortmund University of Applied Sciences and Arts - initial API and implementation
 *******************************************************************************/
export default class TelemetryService {
    
    constructor(domain) {
        this.domain = domain || 'http://localhost:8081';
        this.fetch = this.fetch.bind(this);
    }

    getTelemetryData(uri ,roverNumber) {
        return this.fetch(this.domain + uri, {
            method: 'GET'
        }).then(res => {
            return res;
        })
    }

    fetch(url, options) {
        // performs api calls sending the required authentication headers
        const headers = {
            'Accept': 'application/json',
            'Content-Type': 'application/json'
        }
        
        return fetch(url, {
            headers,
            ...options
        })
            .then(this._checkStatus)
            .then(response => response.json())
    }

    _checkStatus(response) {
        // raises an error in case response status is not a success
        if (response.status >= 200 && response.status < 300) {
            return response
        } else {
            var error = new Error(response.statusText)
            error.response = response
            throw error
        }
    }
}