Add ability to read original response

Fixes #176

Author: OliverJAsh

src/helpers/response.ts

@@ -5,13 +5,15 @@ export type ApiResponse<T> =
   | {
       type: 'success';
       response: T;
+      originalResponse: Response;
       errors?: never;
       status: number;
     }
   | {
       type: 'error';
       source: ErrorSource;
       response?: never;
+      originalResponse: Response;
       errors: Errors;
       status: number;
     };
@@ -27,13 +29,15 @@ export const handleFetchResponse = <ResponseType>(handleResponse: HandleResponse
           type: 'success',
           status: response.status,
           response: handledResponse,
+          originalResponse: response,
         }),
       )
     : getJsonResponse(response).then(
         (jsonResponse): ApiResponse<ResponseType> => ({
           type: 'error',
           status: response.status,
           ...getErrorForBadStatusCode(jsonResponse),
+          originalResponse: response,
         }),
       )
   ).catch(error => {
@@ -51,6 +55,7 @@ export const handleFetchResponse = <ResponseType>(handleResponse: HandleResponse
         type: 'error',
         source: 'decoding',
         status: response.status,
+        originalResponse: response,
         errors: [error.message],
       };
     } else {

tests/index.test.ts

@@ -193,3 +193,10 @@ describe('requestParams', () => {
     });
   });
 });
+
+describe('ApiResponse', () => {
+  const api = createApi({ accessKey: 'MY_ACCESS_KEY' });
+  api.topics.get({ topicIdOrSlug: 'foo' }).then(apiResponse => {
+    apiResponse.originalResponse.headers.get('content-type');
+  });
+});