{* ../../docs_src/advanced_middleware/tutorial001.py hl[2,6] *}

## `TrustedHostMiddleware`

Enforces that all incoming requests have a correctly set `Host` header, in order to guard against HTTP Host Header attacks.

{* ../../docs_src/advanced_middleware/tutorial002.py hl[2,6:8] *}

The following arguments are supported:

        queue[0] = x;
        return 0;
      }
      int parentIndex = getParentIndex(index);
      E parentElement = elementData(parentIndex);
      if (parentIndex != 0) {
        /*
         * This is a guard for the case of the childless aunt node. Since the end of the array is
         * actually the middle of the heap, a smaller childless aunt node can become a child of x

        queue[0] = x;
        return 0;
      }
      int parentIndex = getParentIndex(index);
      E parentElement = elementData(parentIndex);
      if (parentIndex != 0) {
        /*
         * This is a guard for the case of the childless aunt node. Since the end of the array is
         * actually the middle of the heap, a smaller childless aunt node can become a child of x

 $(this._dialog)\n        .one(Util.TRANSITION_END, transitionComplete)\n        .emulateTransitionEnd(transitionDuration)\n    } else {\n      transitionComplete()\n    }\n  }\n\n  _enforceFocus() {\n    $(document)\n      .off(EVENT_FOCUSIN) // Guard against infinite focus loop\n      .on(EVENT_FOCUSIN, event => {\n        if (document !== event.target &&\n            this._element !== event.target &&\n            $(this._element).has(event.target).length === 0) {\n          this._element.focus()\n...