refactor(storage): implement interceptor support in isPublic method

Author: thiyaguk09

handwritten/storage/src/file.ts

@@ -3315,9 +3315,16 @@ class File extends ServiceObject<File, FileMetadata> {
       undefined,
       callback,
     );
-    const url = `${this.storage.apiEndpoint}/${this.bucket.name}/${encodeURIComponent(this.name)}`;
+    const url = `https://${this.storage.apiEndpoint}/storage/v1/b/${this.bucket.name}/o/${encodeURIComponent(this.name)}`;
 
     const gaxios = new Gaxios();
+    const storageInterceptors = this.storage?.interceptors || [];
+    const fileInterceptors = this.interceptors || [];
+    const allInterceptors = storageInterceptors.concat(fileInterceptors);
+
+    for (const curInter of allInterceptors) {
+      gaxios.interceptors.request.add(curInter);
+    }
     gaxios
       .request({
         method: 'GET',

handwritten/storage/src/iam.ts

@@ -462,7 +462,7 @@ class Iam {
       ? permissions
       : [permissions];
 
-    const req: any = {
+    const req: {permissions: string[]; userProject?: string} = {
       permissions: permissionsArray,
     };
     if (options.userProject) {

handwritten/storage/test/file.ts

@@ -3744,7 +3744,7 @@ describe('File', () => {
 
     it('should correctly format URL and method in the request', done => {
       gaxiosStub.resolves({data: {}});
-      const expectedUrl = `${file.storage.apiEndpoint}/${BUCKET.name}/${encodeURIComponent(file.name)}`;
+      const expectedUrl = `https://${file.storage.apiEndpoint}/storage/v1/b/${BUCKET.name}/o/${encodeURIComponent(file.name)}`;
 
       file.isPublic(err => {
         assert.ifError(err);