Question

我从服务器内容进入json对象字段，它是html，<style></style>和<script></script>标记，我想这样执行：

[innerHtml] =“content | sanitize”，但<script></script>标签不会执行。是否有可能使其有效？

我的消毒管道看起来像这样：

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

@Pipe({
    name: 'sanitize',
    pure: true
})
export class Sanitize {
    constructor(private sanitizer: DomSanitizationService) {

    }

    transform(html: string) {

        return this.sanitizer.bypassSecurityTrustHtml(html);
    }
}

我知道，DomSanitizationService中有bypassSecurityTrustScript函数，但我怎么能在我的情况下使用它呢？

Answer 1

这不是角度2的问题，通过innerHTML插入的script标签不会被执行。

如果您的html字符串包含script个标签，请按以下方式插入：

const fragment = document.createRange().createContextualFragment(yourHtmlString);
anyElement.appendChild(fragment);

Answer 2

没有棱角分明的方式......你需要这样做....

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

@Pipe({
  name: 'sanitize',
  pure: true
})
export class Sanitize {

  constructor(private domSanitizer: DomSanitizer) { }


  handleExternalScriptsInHtmlString(string) {
    let that = this;
    var parser = new DOMParser();
    var scripts = parser.parseFromString(string, 'text/html').getElementsByTagName('script');
    var results = [];

    for (var i = 0; i < scripts.length; i++) {
      var src = scripts[i].getAttribute('src');
      if (src.length && results.indexOf(src) === -1) {
        results.push(src);
        that.addScript(src);
      }
    }

    return results;
  }

  addScript(src) {
    var script = document.createElement('script');
    script.setAttribute('src', src);
    document.body.appendChild(script);
  }


  transform(htmlContent: any) {
    let sanitizeHtmlContent = this.domSanitizer.bypassSecurityTrustHtml(htmlContent);

    this.handleExternalScriptsInHtmlString(htmlContent);

    return sanitizeHtmlContent;
  }
}

Answer 3

这将解决问题...

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

@Pipe({
  name: 'sanitize',
  pure: true
})
export class Sanitize {

  constructor(private domSanitizer: DomSanitizer) { }


  handleExternalScriptsInHtmlString(string) {
    let that = this;
    var parser = new DOMParser();
    var scripts = parser.parseFromString(string, 'text/html').getElementsByTagName('script');
    var results = [];

    for (var i = 0; i < scripts.length; i++) {
      var src = scripts[i].getAttribute('src');
      if (src.length && results.indexOf(src) === -1) {
        results.push(src);
        that.addScript(src);
      }
    }

    return results;
  }

  addScript(src) {
    var script = document.createElement('script');
    script.setAttribute('src', src);
    document.body.appendChild(script);
  }


  transform(htmlContent: any) {
    let sanitizeHtmlContent = this.domSanitizer.bypassSecurityTrustHtml(htmlContent);

    this.handleExternalScriptsInHtmlString(htmlContent);

    return sanitizeHtmlContent;
  }
}

Angular2动态插入脚本标记

3 个答案: