Resolved #6: Add X-Requested-With header for AJAX requests.

Author: hikalkan

src/abpHttp.ts

@@ -272,12 +272,19 @@ export class AbpHttp extends Http {
             options.headers = new Headers();
         }
 
+        this.addXRequestedWithHeader(options);
         this.addAuthorizationHeaders(options);
         this.addAspNetCoreCultureHeader(options);
         this.addAcceptLanguageHeader(options);
         this.addTenantIdHeader(options);
     }
 
+    protected addXRequestedWithHeader(options: RequestOptionsArgs) {
+        if (options.headers) {
+            options.headers.append('X-Requested-With', 'XMLHttpRequest');
+        }
+    }
+
     protected addAspNetCoreCultureHeader(options: RequestOptionsArgs) {
         let cookieLangValue = this._utilsService.getCookieValue("Abp.Localization.CultureName");
         if (cookieLangValue && options.headers && !options.headers.has('.AspNetCore.Culture')) {