Rocket.Chat.ReactNative/app/utils/fetch.ts

import { Platform } from 'react-native';
import DeviceInfo from 'react-native-device-info';
import { settings as RocketChatSettings } from '@rocket.chat/sdk';

import RocketChat from '../lib/rocketchat';

interface CustomHeaders {
	'User-Agent': string;
	Authorization?: string;
}

// this form is required by Rocket.Chat's parser in "app/statistics/server/lib/UAParserCustom.js"
export const headers: CustomHeaders = {
	'User-Agent': `RC Mobile; ${
		Platform.OS
	} ${DeviceInfo.getSystemVersion()}; v${DeviceInfo.getVersion()} (${DeviceInfo.getBuildNumber()})`
};

let _basicAuth;
export const setBasicAuth = (basicAuth: string): void => {
	_basicAuth = basicAuth;
	if (basicAuth) {
		RocketChatSettings.customHeaders = { ...headers, Authorization: `Basic ${_basicAuth}` };
	} else {
		RocketChatSettings.customHeaders = headers;
	}
};
export const BASIC_AUTH_KEY = 'BASIC_AUTH_KEY';

RocketChatSettings.customHeaders = headers;

export default (url: string, options: { headers?: Headers; signal?: AbortSignal } = {}): Promise<Response> => {
	let customOptions = { ...options, headers: RocketChatSettings.customHeaders };
	if (options && options.headers) {
		customOptions = { ...customOptions, headers: { ...options.headers, ...customOptions.headers } };
	}
	// TODO: Refactor when migrate rocketchat.js
	// @ts-ignore
	if (RocketChat.controller) {
		// @ts-ignore
		const { signal } = RocketChat.controller;
		customOptions = { ...customOptions, signal };
	}
	return fetch(url, customOptions);
};