check whether window.location is defined to work on React Native

Author: tcaesvk

lib/client.js

@@ -125,7 +125,7 @@ SwaggerClient.prototype.initialize = function (url, options) {
 
   if(this.url && this.url.indexOf('http:') === -1 && this.url.indexOf('https:') === -1) {
     // no protocol, so we can only use window if it exists
-    if(typeof(window) !== 'undefined' && window && window.location) {
+    if(typeof(window) !== 'undefined' && typeof(window.location) !== 'undefined') {
       this.url = window.location.origin + this.url;
     }
   }
@@ -346,18 +346,18 @@ SwaggerClient.prototype.buildFromSpec = function (response) {
   if (typeof this.url === 'string') {
     location = this.parseUri(this.url);
     if (typeof this.scheme === 'undefined' && typeof this.schemes === 'undefined' || this.schemes.length === 0) {
-      if(typeof window !== 'undefined') {
+      if(typeof window !== 'undefined' && typeof(window.location) !== 'undefined') {
         // use the window scheme
         this.scheme = window.location.protocol.replace(':','');
       }
       else {
         this.scheme = location.scheme || 'http';
       }
-    } else if (typeof window !== 'undefined' && window.location.protocol.indexOf('chrome-extension') === 0) {
+    } else if (typeof window !== 'undefined' && typeof(window.location) !== 'undefined' && window.location.protocol.indexOf('chrome-extension') === 0) {
 		// if it is chrome swagger ui extension scheme then let swagger doc url scheme decide the protocol
 		this.scheme = location.scheme;
 	} else if (typeof this.scheme === 'undefined') {
-      if(typeof window !== 'undefined') {
+      if(typeof window !== 'undefined' && typeof(window.location) !== 'undefined') {
         var scheme = window.location.protocol.replace(':','');
         if(scheme === 'https' && this.schemes.indexOf(scheme) === -1) {
           // can't call http from https served page in a browser!