javascript - 找不到管道 'safeResourceUrl'

Question

我正在努力解决一些安全错误，因为我正在尝试将 youtube 视频动态嵌入到我的 Angular 2 应用程序中。在这里找到关于使用管道清理 url 的答案。

但是遇到了这个当前错误。

The pipe 'safeResourceUrl' could not be found

SafeResourceUrl.pipe.ts

import { Pipe } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';

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

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

我已将它导入我的 app.module

import { NgModule } from '@angular/core';
import { HomeModule } from './home/home.module';
import { SharedModule } from './shared/shared.module';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { SafeResourceUrl } from './shared/pipes/saferesourceurl.pipe';

@NgModule({
    declarations: [
        AppComponent,
        SafeResourceUrl
    ],
    imports: [
        SharedModule,
        HomeModule,
        AppRoutingModule
    ]
})

并导入我的 home.component.ts

从 '../shared/pipes/saferesourceurl.pipe' 导入 { SafeResourceUrl };

home.component.html 的标记

<div class="container col-lg-3 col-md-6 col-sm-12" *ngFor="let card of category.categorycards">
<div class="thumbnail">
    <a href="/wiki/entity" *ngIf="card.type == 'image'">
        <div class="image-wrap">
            <img [src]="card.graphic" class="img-responsive" alt="[card.title]" title="[card.title]">
        </div>
    </a>

    <a href="/wiki/category" *ngIf="card.type == 'video'">
        <div class="image-wrap">
            <iframe title="YouTube video player"
                    class="youtube-player" type="text/html" 

                    [src]="card.url | safeResourceUrl"

                    height="100%" width="100%" frameborder="0"></iframe>
        </div>
    </a>

Answer 1

管道无法在全局范围内使用。它们需要在任何地方被导入，就像组件或指令一样。

@NgModule({
    declarations: [
        SafeResourceUrl
    ],
    imports: [
      CommonModule
    ]
})
class SharedModule {

@NgModule({
    declarations: [
      CommonModule,
      HomeComponent,
    ],
    imports: [
        SharedModule,
    ]
})
class HomeModule