Question

我正在尝试在我的角度应用程序中检查特定的响应标头。如果用户尝试访问需要有效JWT且JWT过期的路由，则来自后端ASP.NET Core服务器的响应标头将具有token-expired: true。我想在将用户发送到刷新路由之前检查该值。

我已经尝试了以下方法来查看整个响应头，但是我没有成功：

`public fetchPosts(): Observable<HttpResponse<Object>>  {
    var b = this.http.get<HttpResponse<Object>>('api/v1/posts', {observe: 'response'}).pipe(
      tap(resp => console.log('THE RESPONSE FOR FETCH POSTS IS:', resp))
    )
    console.log('THIS IS VALUE OF B: ', b);
    return b;
  }`

b的值始终是：

`
Observable {_isScalar: false, source: Observable, operator: DoOperator}
post.service.ts:20
_isScalar:false
operator:DoOperator {nextOrObserver: , error: undefined, complete: undefined}
complete:undefined
error:undefined
nextOrObserver:function (resp) { … }
[[FunctionLocation]]:internal#location
[[Scopes]]:Scopes[2]
arguments:TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them
caller:TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them
length:1
name:""
prototype:Object {constructor: }
`

我了解到，我需要在后端服务器上专门公开某些响应标头，但事实是b对象具有两个未定义的error和complete键，让我想知道我是否确实在做错事？

任何见识将不胜感激。

Answer 1

如the guide中所述，当HttpClient从服务器接收到错误响应时，带有标题的Http响应就是作为错误事件发出的。因此，您只需在订阅（或使用public class Item { public int Id { get; set; } public int? ParentId { get; set; } public override int GetHashCode() { return Id.GetHashCode(); } public override bool Equals(object obj) { return Id == (obj as Item)?.Id; } }或public class Program { private static void Main(string[] args) { var list1 = new List<Item> { new Item {Id = 1, ParentId = null}, new Item {Id = 2, ParentId = null}, new Item {Id = 3, ParentId = 1} }; var list2 = new List<Item> { new Item {Id = 3, ParentId = 1} }; var result = list2.Union(list1.Where(l1 => list2.All(l2 => l2.ParentId != l1.Id))); GetKeyFromUser("\nDone! Press any key to exit..."); } }）时提供错误处理程序即可。

tap()

如何以角度返回整个HTTP响应以查看特定的响应头？

1 个答案: