Javascript 角度2-异常：错误：资源URL上下文中使用了不安全的值

我得到以下错误：

角度2-异常：错误：资源URL上下文中使用了不安全的值

这可能与启动时不立即使用媒体项有关吗？还是与URL不安全有关？我正在试着消毒它

export class HomeComponent {

  sanitizer: DomSanitizationService;
  errorMessage: string;
  activeMedia: MediaItem = new MediaItem(0, '', '', '', '', '', '');

  constructor(
    private mediaStorage: MediaStorageService, 
    private harvesterService: HarvesterService, 
    sanitizer: DomSanitizationService) {

    this.sanitizer = sanitizer;
    // Initial call - 
    harvesterService.getMediaItems(10, 'type', 'category');
    let subscription = harvesterService.initialMediaHarvestedEvent.subscribe(() => {
      this.activeMedia = mediaStorage.mediaList[0];
      let newURL = this.activeMedia.URL + '?rel=0&autoplay=1';
      newURL = newURL.replace('watch?v=', 'v/');
      this.activeMedia.URL = newURL; //sanitizer.bypassSecurityTrustUrl(newURL);
      console.log(newURL);
    });
  }

  cleanURL(oldURL: string): SafeResourceUrl {
    return this.sanitizer.bypassSecurityTrustUrl(oldURL);
  }
}

模板代码为：

<div class="row" >
    <iframe 
      id="video"  
      class="video" 
      src="{{ cleanURL(activeMedia.URL) }}" 
      frameborder="0" 
      allowfullscreen>
    </iframe>
</div>

---

更新：更改

 src="{{cleanURL(activeMedia.URL)}}"

致：

我得到：原始异常：错误：需要一个安全的资源URL，得到一个URL

通过将cleanURL方法中的代码更改为：

 return this.sanitizer.bypassSecurityTrustResourceUrl(oldURL);

而不是：

 return this.sanitizer.bypassSecurityTrustUrl(oldURL);

试试这个：

cleanURL(oldURL: string): string  {
 return this._sanitationService.sanitize(SecurityContext.URL, oldURL);
}

---

我已经用这个解决方案显示了PDF，但是cleanURL（）方法运行了多次，导致PDF闪烁。不要作为函数运行，保持值持久不计算

cleanURL(oldURL: string): string  {
 return this._sanitationService.sanitize(SecurityContext.URL, oldURL);
}