chore: fix typo

Author: DudaGod

lib/http-proxy/ws/interceptor.js

@@ -5,16 +5,16 @@ const Extensions = require('ws/lib/Extensions');
 const Receiver = require('ws/lib/Receiver');
 const Sender = require('ws/lib/Sender');
 
-const acceptExtensions = ({extenstions, isServer}) => {
+const acceptExtensions = ({extensions, isServer}) => {
     const {extensionName} = PerMessageDeflate;
-    const extenstion = extenstions[extensionName];
+    const extension = extensions[extensionName];
 
-    if (!extenstion) {
+    if (!extension) {
         return {};
     }
 
     const perMessageDeflate = new PerMessageDeflate({}, isServer);
-    perMessageDeflate.accept(extenstion);
+    perMessageDeflate.accept(extension);
 
     return {[extensionName]: perMessageDeflate};
 };
@@ -52,12 +52,12 @@ module.exports = class Interceptor {
 
     _configure() {
         const secWsExtensions = this._proxyRes.headers['sec-websocket-extensions'];
-        const extenstions = Extensions.parse(secWsExtensions);
-        this._isCompressed = secWsExtensions && secWsExtensions.indexOf('permessage-deflate') != -1;
+        const extensions = Extensions.parse(secWsExtensions);
+        this._isCompressed = secWsExtensions && secWsExtensions.includes('permessage-deflate');
 
         // need both versions of extensions for each side of the proxy connection
-        this._clientExtenstions = this._isCompressed ? acceptExtensions({extenstions, isServer: false}) : null;
-        this._serverExtenstions = this._isCompressed ? acceptExtensions({extenstions, isServer: true}) : null;
+        this._clientExtensions = this._isCompressed ? acceptExtensions({extensions, isServer: false}) : null;
+        this._serverExtensions = this._isCompressed ? acceptExtensions({extensions, isServer: true}) : null;
     }
 
     _getDataSender({sender, event, options}) {
@@ -70,8 +70,8 @@ module.exports = class Interceptor {
     }
 
     _interceptClientMessages() {
-        const receiver = new Receiver(this._clientExtenstions);
-        const sender = new Sender(this._proxySocket, this._serverExtenstions);
+        const receiver = new Receiver(this._clientExtensions);
+        const sender = new Sender(this._proxySocket, this._serverExtensions);
 
         // frame must be masked when send from client to server - https://tools.ietf.org/html/rfc6455#section-5.3
         const options = {mask: true};
@@ -85,8 +85,8 @@ module.exports = class Interceptor {
     }
 
     _interceptServerMessages() {
-        const receiver = new Receiver(this._serverExtenstions);
-        const sender = new Sender(this._socket, this._clientExtenstions);
+        const receiver = new Receiver(this._serverExtensions);
+        const sender = new Sender(this._socket, this._clientExtensions);
 
         const options = {mask: false};
         const dataSender = this._getDataSender({sender, event: 'wsServerMsg', options});