feat: add HTTP headers through reachabilityHeaders param to NetInfoConfiguration

README.md

@@ -224,6 +224,7 @@ The configuration options for the library.
 | Property | Type | Default | Description
 | ---------------------------- | --------------------------------- | ----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
 | `reachabilityUrl`            | `string`                          | `https://clients3.google.com/generate_204` | The URL to call to test if the internet is reachable. Only used on platforms which do not supply internet reachability natively or if `useNativeReachability` is `false`.           
+| `reachabilityHeaders`            | `object`                          | `{}` | A HTTP headers object, an object literal, or an array of two-item arrays to set request's headers, to use during the reachabilityUrl URL call to test if the internet is reachable. Defaults to `{}`.                                                                                               |
 | `reachabilityMethod`            | `NetInfoMethodType`                          | `HEAD` | The HTTP request method to use to call reachabilityUrl URL to call to test if the internet is reachable. Defaults to `HEAD`. `GET` is also available                                                                                               |
 | `reachabilityTest`           | `(response: Response) => boolean` | `Promise.resolve(response.status === 204)` | A function which is passed the `Response` from calling the reachability URL. It should return `true` if the response indicates that the internet is reachable. Only used on platforms which do not supply internet reachability natively or if `useNativeReachability` is `false`. |
 | `reachabilityShortTimeout`   | `number`                          | 5 seconds | The number of milliseconds between internet reachability checks when the internet was not previously detected. Only used on platforms which do not supply internet reachability natively or if `useNativeReachability` is `false`.                                                 |

src/internal/defaultConfiguration.ts

@@ -3,6 +3,7 @@ import * as Types from './types';
 const DEFAULT_CONFIGURATION: Types.NetInfoConfiguration = {
   reachabilityUrl: 'https://clients3.google.com/generate_204',
   reachabilityMethod: 'HEAD',
+  reachabilityHeaders: {},
   reachabilityTest: (response: Response): Promise<boolean> =>
     Promise.resolve(response.status === 204),
   reachabilityShortTimeout: 5 * 1000, // 5s

src/internal/defaultConfiguration.web.ts

@@ -3,6 +3,7 @@ import * as Types from './types';
 const DEFAULT_CONFIGURATION: Types.NetInfoConfiguration = {
   reachabilityUrl: '/',
   reachabilityMethod: "HEAD",
+  reachabilityHeaders: {},
   reachabilityTest: (response: Response): Promise<boolean> =>
     Promise.resolve(response.status === 200),
   reachabilityShortTimeout: 5 * 1000, // 5s

src/internal/internetReachability.ts

@@ -69,6 +69,7 @@ export default class InternetReachability {
 
   private _checkInternetReachability = (): InternetReachabilityCheckHandler => {
     const responsePromise = fetch(this._configuration.reachabilityUrl, {
+      headers: this._configuration.reachabilityHeaders,
       method: this._configuration.reachabilityMethod,
       cache: 'no-cache',
     });

src/internal/types.ts

@@ -115,6 +115,7 @@ export type NetInfoSubscription = () => void;
 export interface NetInfoConfiguration {
   reachabilityUrl: string;
   reachabilityMethod?: NetInfoMethodType;
+  reachabilityHeaders?: HeadersInit;
   reachabilityTest: (response: Response) => Promise<boolean>;
   reachabilityLongTimeout: number;
   reachabilityShortTimeout: number;