Use request package instead of node-fetch

index.js

@@ -1,5 +1,5 @@
-const nodeFetch = require( 'node-fetch' );
 const {
+	defaultFetch,
 	fetchNotifications,
 	getAdditionalDataFetcher,
 	sendMarkNotificationRead
@@ -8,7 +8,7 @@ const { makeConverter } = require( './lib/converter' );
 
 function createNoteGetter( options = {} ) {
 	const defaultOptions = {
-		fetch: nodeFetch,
+		fetch: defaultFetch,
 		log: () => {},
 	};
 	const mergedOptions = Object.assign( {}, defaultOptions, options );
@@ -23,7 +23,7 @@ function createNoteGetter( options = {} ) {
 
 function createNoteMarkRead( options = {} ) {
 	const defaultOptions = {
-		fetch: nodeFetch,
+		fetch: defaultFetch,
 		log: () => {},
 	};
 	const mergedOptions = Object.assign( {}, defaultOptions, options );

lib/fetchers.js

@@ -1,16 +1,21 @@
 const get = require( 'lodash.get' );
+const request = require( 'request' );
 const withQuery = require( 'with-query' ).default;
 
 function getFetchInit( token, method = 'GET' ) {
 	return {
 		method,
 		headers: {
+			'User-Agent': 'request',
 			Authorization: 'token ' + token,
 		},
 	};
 }
 
 function convertToJson( result ) {
+	if ( ! result.json ) {
+		return result;
+	}
 	return result.json();
 }
 
@@ -118,8 +123,41 @@ function sendMarkNotificationRead( options, token, note, params ) {
 		.then( checkForHttpErrors );
 }
 
+/**
+ * Transforms the result of `request` into a response object like the one used
+ * by `fetch`.
+ */
+function getResponseObjectFromRequest( json, responseData ) {
+	return {
+		ok: responseData && responseData.statusCode > 199 && responseData.statusCode < 300,
+		status: responseData ? responseData.statusCode : 500,
+		statusText: responseData ? ( responseData.statusText || 'OK' ) : 'NOT-OK',
+		json: () => Promise.resolve( JSON.parse( json ) ),
+	};
+}
+
+/**
+ * Makes an http request using `request`, but the response is returned by a
+ * Promise in the same format as `fetch`.
+ */
+function defaultFetch( url, options ) {
+	options.url = url;
+	return new Promise( ( resolve, reject ) => {
+		request( options, ( error, response, body ) => {
+			if ( error ) {
+				return reject( error );
+			}
+			if ( response.statusCode !== 200 ) {
+				return reject( response );
+			}
+			resolve( getResponseObjectFromRequest( body, response ) );
+		} );
+	} );
+}
+
 module.exports = {
 	fetchNotifications,
 	getAdditionalDataFetcher,
 	sendMarkNotificationRead,
+	defaultFetch,
 };

package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "lodash.get": "^4.4.2",
     "md5-hex": "^2.0.0",
-    "node-fetch": "^2.2.0",
+    "request": "^2.88.0",
     "with-query": "^1.1.2"
   },
   "devDependencies": {