fix(datafile manager): Node datafile requests use gzip,deflate compression

packages/datafile-manager/__test__/rawTest.ts

@@ -0,0 +1,19 @@
+import { HttpPollingDatafileManager } from '../src/index.node';
+import { setLogLevel, setLogHandler, ConsoleLogHandler } from '@optimizely/js-sdk-logging';
+
+setLogLevel('debug');
+setLogHandler(new ConsoleLogHandler());
+
+const manager = new HttpPollingDatafileManager({
+  sdkKey: '9LCprAQyd1bs1BBXZ3nVji',
+  updateInterval: 5000,
+});
+
+manager.start();
+manager.onReady().then(() => {
+  console.log('ready');
+});
+
+manager.on('update', () => {
+  console.log('update: ');
+});

packages/datafile-manager/package.json

@@ -44,7 +44,8 @@
   },
   "dependencies": {
     "@optimizely/js-sdk-logging": "^0.1.0",
-    "@optimizely/js-sdk-utils": "^0.2.0"
+    "@optimizely/js-sdk-utils": "^0.2.0",
+    "decompress-response": "^4.2.1"
   },
   "peerDependencies": {
     "@react-native-community/async-storage": "^1.2.0"

packages/datafile-manager/src/nodeRequest.ts

@@ -19,6 +19,7 @@ import https from 'https';
 import url from 'url';
 import { Headers, AbortableRequest, Response } from './http';
 import { REQUEST_TIMEOUT_MS } from './config';
+import decompressResponse from 'decompress-response';
 
 // Shared signature between http.request and https.request
 type ClientRequestCreator = (options: http.RequestOptions) => http.ClientRequest;
@@ -74,16 +75,18 @@ function getResponseFromRequest(request: http.ClientRequest): Promise<Response>
         return;
       }
 
-      incomingMessage.setEncoding('utf8');
+      const response = decompressResponse(incomingMessage);
+
+      response.setEncoding('utf8');
 
       let responseData = '';
-      incomingMessage.on('data', (chunk: string) => {
+      response.on('data', (chunk: string) => {
         if (!request.aborted) {
           responseData += chunk;
         }
       });
 
-      incomingMessage.on('end', () => {
+      response.on('end', () => {
         if (request.aborted) {
           return;
         }
@@ -131,7 +134,10 @@ export function makeGetRequest(reqUrl: string, headers: Headers): AbortableReque
   const requestOptions: http.RequestOptions = {
     ...getRequestOptionsFromUrl(parsedUrl),
     method: 'GET',
-    headers,
+    headers: {
+      ...headers,
+      'Accept-Encoding': 'gzip,deflate',
+    },
   };
 
   const request = requester(requestOptions);