import { Platform } from 'react-native'; import DeviceInfo from 'react-native-device-info'; export const headers = { 'User-Agent': `RC-RN Mobile/${ DeviceInfo.getVersion() } (build: ${ DeviceInfo.getBuildNumber() }; os: ${ Platform.OS } ${ DeviceInfo.getSystemVersion() })` }; export default (url, options = {}) => { let customOptions = { ...options, headers }; if (options && options.headers) { customOptions = { ...customOptions, headers: { ...options.headers, ...headers } }; } return fetch(url, customOptions); };