fix(http): include transferCache when cloning HttpRequest

Fixes a bug where HttpRequest.clone() does not include the transferCache property.

Fixes #54924.

packages/common/http/src/request.ts

@@ -439,6 +439,7 @@ export class HttpRequest<T> {
     params?: HttpParams;
     responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
     withCredentials?: boolean;
+    transferCache?: {includeHeaders?: string[]} | boolean;
     body?: T | null;
     method?: string;
     url?: string;
@@ -452,6 +453,7 @@ export class HttpRequest<T> {
     params?: HttpParams;
     responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
     withCredentials?: boolean;
+    transferCache?: {includeHeaders?: string[]} | boolean;
     body?: V | null;
     method?: string;
     url?: string;
@@ -466,6 +468,7 @@ export class HttpRequest<T> {
       params?: HttpParams;
       responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
       withCredentials?: boolean;
+      transferCache?: {includeHeaders?: string[]} | boolean;
       body?: any | null;
       method?: string;
       url?: string;
@@ -479,6 +482,10 @@ export class HttpRequest<T> {
     const url = update.url || this.url;
     const responseType = update.responseType || this.responseType;
 
+    // Carefully handle the transferCache to differentiate between
+    // `false` and `undefined` in the update args.
+    const transferCache = update.transferCache ?? this.transferCache;
+
     // The body is somewhat special - a `null` value in update.body means
     // whatever current body is present is being overridden with an empty
     // body, whereas an `undefined` value in update.body implies no
@@ -526,6 +533,7 @@ export class HttpRequest<T> {
       reportProgress,
       responseType,
       withCredentials,
+      transferCache,
     });
   }
 }

packages/common/http/test/request_spec.ts

@@ -76,6 +76,7 @@ describe('HttpRequest', () => {
       reportProgress: true,
       responseType: 'text',
       withCredentials: true,
+      transferCache: true,
     });
     it('in the base case', () => {
       const clone = req.clone();
@@ -87,6 +88,7 @@ describe('HttpRequest', () => {
       expect(clone.headers.get('Test')).toBe('Test header');
 
       expect(clone.context).toBe(context);
+      expect(clone.transferCache).toBe(true);
     });
     it('and updates the url', () => {
       expect(req.clone({url: '/changed'}).url).toBe('/changed');
@@ -101,6 +103,9 @@ describe('HttpRequest', () => {
       const newContext = new HttpContext();
       expect(req.clone({context: newContext}).context).toBe(newContext);
     });
+    it('and updates the transferCache', () => {
+      expect(req.clone({transferCache: false}).transferCache).toBe(false);
+    });
   });
   describe('content type detection', () => {
     const baseReq = new HttpRequest('POST', '/test', null);