diff --git a/src/services/api.service.ts b/src/services/api.service.ts
index 8b4acd2bd9..fcff0bf77d 100644
--- a/src/services/api.service.ts
+++ b/src/services/api.service.ts
@@ -166,8 +166,7 @@ export class ApiService implements ApiServiceAbstraction {
         }));
 
         let responseJson: any = null;
-        const typeHeader = response.headers.get('content-type');
-        if (typeHeader != null && typeHeader.indexOf('application/json') > -1) {
+        if (this.isJsonResponse(response)) {
             responseJson = await response.json();
         }
 
@@ -932,8 +931,7 @@ export class ApiService implements ApiServiceAbstraction {
         }
 
         let responseJson: any = null;
-        const typeHeader = response.headers.get('content-type');
-        if (typeHeader != null && typeHeader.indexOf('application/json') > -1) {
+        if (this.isJsonResponse(response)) {
             responseJson = await response.json();
         }
 
@@ -1001,4 +999,9 @@ export class ApiService implements ApiServiceAbstraction {
         }
         return base;
     }
+
+    private isJsonResponse(response: Response): boolean {
+        const typeHeader = response.headers.get('content-type');
+        return typeHeader != null && typeHeader.indexOf('application/json') > -1;
+    }
 }