手动清理字符串

Question

我有一个textarea当用户将键入一些文字。文字不能的JavaScript或HTML等。我想手动消毒数据，并将其保存为一个字符串。

我无法弄清楚如何使用DomSanitizationService手动清理我的数据。

如果我做{{ textare_text }}在页面上然后将数据正确消毒。

我如何做手工的string我有吗？

Answer 1

您可以按如下消毒HTML：

import { Component, SecurityContext } from '@angular/core';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';

@Component({
  selector: 'my-app',
  template: `
  <div [innerHTML]="_htmlProperty"></div>
  `
})
export class AppComponent {

  _htmlProperty: string = 'AAA<input type="text" name="name">BBB';

  constructor(private _sanitizer: DomSanitizer){ }

  public get htmlProperty() : SafeHtml {
     return this._sanitizer.sanitize(SecurityContext.HTML, this._htmlProperty);
  }

}

Demo plunker here。

---

从你的意见，你其实是想逃避不消毒。

为此，check this plunker, where we have both escaping and sanitization。

import { Component, SecurityContext } from '@angular/core';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';

@Component({
  selector: 'my-app',
  template: `Original, using interpolation (double curly braces):<b>
        <div>{{ _originalHtmlProperty }}</div> 
  </b><hr>Sanitized, used as innerHTML:<b>
        <div [innerHTML]="sanitizedHtmlProperty"></div>
  </b><hr>Escaped, used as innerHTML:<b>
      <div [innerHTML]="escapedHtmlProperty"></div>
  </b><hr>Escaped AND sanitized used as innerHTML:<b>
      <div [innerHTML]="escapedAndSanitizedHtmlProperty"></div>
  </b>`
})
export class AppComponent {
  _originalHtmlProperty: string = 'AAA<input type="text" name="name">BBB';
  constructor(private _sanitizer: DomSanitizer){ }

  public get sanitizedHtmlProperty() : SafeHtml {
     return this._sanitizer.sanitize(SecurityContext.HTML, this._originalHtmlProperty);
  }

  public get escapedHtmlProperty() : string {
     return this.escapeHtml(this._originalHtmlProperty);
  }

  public get escapedAndSanitizedHtmlProperty() : string {
     return this._sanitizer.sanitize(SecurityContext.HTML, this.escapeHtml(this._originalHtmlProperty));
  }

  escapeHtml(unsafe) {
    return unsafe.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;")
                 .replace(/"/g, "&quot;").replace(/'/g, "&#039;");
  }
}

上面使用的HTML escaping function转义字符相同的angular code does（不幸的是，他们避开功能是不公开的，所以我们不能使用它）。

Answer 2

在角最后你可以使用这样的：

1. 首先导入“DomSanitizer”从平台角度浏览器：

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

2. 然后在构造函数： constructor(private _sanitizer: DomSanitizer){}
3. 然后在你的类一样使用：

   var title = "<script> alert('Hello')</script>"
   title = this._sanitizer.sanitize(SecurityContext.HTML, title);

Answer 3

在角^ 2.3.1

具有使用了bootstrap4进度视图。看到，在例子中，我们需要style.width的值。

<!-- View HTML-->
<div class="progress">
    <div class="progress-bar" role="progressbar" [style.width]="getProgress('style')" aria-valuenow="getProgress()" aria-valuemin="0" aria-valuemax="100"></div>
</div>

我们需要消毒这个style.width值。我们需要使用DomSanitizer消毒的价值和SecurityContext的指定范围内。在这个例子中，背景是风格。

// note that we need to use SecurityContext and DomSanitizer
// SecurityContext.STYLE
import { Component, OnInit, Input } from '@angular/core';
import { SecurityContext} from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';


@Component({
  selector: 'app-challenge-progress',
  templateUrl: './challenge-progress.component.html',
  styleUrls: ['./challenge-progress.component.sass']
})
export class ChallengeProgressComponent implements OnInit {

  @Input() data: any;

  constructor(private _sanitizer: DomSanitizer) { }

  ngOnInit() {
  }

  getProgress(type: string): any {
    if(type === 'style') {
      // here is the line you are looking for
      return this._sanitizer.sanitize(SecurityContext.STYLE,this._getProgress()+'%');
    }
    return this._getProgress();
  }

  private _getProgress():number {
    if(this.data) {
      return this.data.goal_total_current/this.data.goal*100;
    }
    return 0;
  }
}