angular 2 - 如何嵌入 youtube 视频

Question

我得到了这个代码

 <div *ngIf="topic.video">
        <div class="video-container">
            <iframe width="300" height="169" src="topic.video.url" style="border:0"></iframe>
        </div>
    </div>

问题:angular 将输出 src="localhost://8001" 而不是 src="https://www.youtube.com/embed/hr4BbdUiTUM"

这里可能出了什么问题？

更新 2

这是 Gunter 回答后的结果。

import { Component, OnInit, Pipe, Sanitizer } from '@angular/core';
import { DataService } from '../../shared/data';

    @Component({
        template: `
            <div class="subheader">Feed</div>
                <div *ngFor="let topic of topics; let index = index; trackBy: trackByFn">
                    <div *ngIf="topic.type == 'discussion'">
                        <div *ngIf="topic.video">
                            <div class="video-container">
                                <iframe src="{{sanitizer.bypassSecurityTrustResourceUrl(topic.video.url)}}" ></iframe>
                            </div>
                        </div>
                </div>
            </div>
        `
    })
    export class CompanyComponent implements OnInit {
        constructor(
            private sanitizer:Sanitizer,
            private dataService: DataService
        ) {}

        ngOnInit() {
            this.topics = this.dataService.topics;
        }
    }

我仍然遇到这个错误

company.ts?ac6a:121 Error: Uncaught (in promise): Error: Error in ./CompanyComponent class CompanyComponent - inline template:29:41 caused by: unsafe value used in a resource URL context (see http://g.co/ng/security#xss)
Error: unsafe value used in a resource URL context (see 

Answer 1

如果您想从一个变量中获取 URL，您需要使用 [] 或 {{}} 启用绑定(bind)(永远不要同时使用这两者，{{}} 仅适用于字符串，不适用于对象或数组):

[src]="topic.video.url"

或

src="{{topic.video.url}}" 

如果 URL 被 DOM 清理器删除，您可以使用 In RC.1 some styles can't be added using binding syntax 中所示的管道

import { Pipe, DomSanitizer } from '@angular/core';

@Pipe({name: 'safeResourceUrl'})
export class SafeResourceUrl {
  constructor(private sanitizer:DomSanitizer){}

  transform(url) {
    return this.sanitizer.bypassSecurityTrustResourceUrl(url);
  }
}

[src]="topic.video.url | safeResourceUrl"

你也可以申请

this.myUrl = this.sanitizer.bypassSecurityTrustResourceUrl(this.topic.video.url);

并改为绑定(bind)到这个

[src]="myUrl"

但管道的可重用性更高。