AngularJS: API: ngSanitize/service/$sanitize

$sanitize

- service in module ngSanitize

The input is sanitized by parsing the html into tokens. All safe tokens (from a whitelist) are then serialized back to properly escaped html string. This means that no unsafe input can make it into the returned string, however, since our parser is more strict than a typical browser parser, it's possible that some obscure input, which would be recognized as valid HTML by a browser, won't make it through the sanitizer. The whitelist is configured using the functions aHrefSanitizationWhitelist and imgSrcSanitizationWhitelist of $compileProvider.

用法

$sanitize(html);

参数

参数	类型	详述
html	string	Html input.

返回值

string

Sanitized html.

示例

index.html

<script>
    angular.module('sanitizeExample', ['ngSanitize'])
      .controller('ExampleController', ['$scope', '$sce', Function($scope, $sce) {
        $scope.snippet =
          '<p style="color:blue">an html\n' +
          '<em onmouseover="this.textContent=\'PWN3D!\'">click here</em>\n' +
          'snippet</p>';
        $scope.deliberatelyTrustDangerousSnippet = Function() {
          return $sce.trustAsHtml($scope.snippet);
        };
      }]);</script><div ng-controller="ExampleController">
   Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
  <table>
    <tr>
      <td>Directive</td>
      <td>How</td>
      <td>Source</td>
      <td>Rendered</td>
    </tr>
    <tr id="bind-html-with-sanitize">
      <td>ng-bind-html</td>
      <td>Automatically uses $sanitize</td>
      <td><pre><div ng-bind-html="snippet"><br/></div></pre></td>
      <td><div ng-bind-html="snippet"></div></td>
    </tr>
    <tr id="bind-html-with-trust">
      <td>ng-bind-html</td>
      <td>Bypass $sanitize by explicitly trusting the dangerous value</td>
      <td>
      <pre><div ng-bind-html="deliberatelyTrustDangerousSnippet()"></div></pre>
      </td>
      <td><div ng-bind-html="deliberatelyTrustDangerousSnippet()"></div></td>
    </tr>
    <tr id="bind-default">
      <td>ng-bind</td>
      <td>Automatically escapes</td>
      <td><pre><div ng-bind="snippet"><br/></div></pre></td>
      <td><div ng-bind="snippet"></div></td>
    </tr>
  </table>
  </div>

protractor.js

it('should sanitize the html snippet by default', Function() {
  expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
    toBe('<p>an html\n<em>click here</em>\nsnippet</p>');});

it('should inline raw snippet if bound to a trusted value', Function() {
  expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).
    toBe("<p style=\"color:blue\">an html\n" +
         "<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
         "snippet</p>");});

it('should escape snippet without any filter', Function() {
  expect(element(by.css('#bind-default div')).getInnerHtml()).
    toBe("<p style=\"color:blue\">an html\n" +
         "<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
         "snippet</p>");});

it('should update', Function() {
  element(by.model('snippet')).clear();
  element(by.model('snippet')).sendKeys('new <b onclick="alert(1)">text</b>');
  expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
    toBe('new <b>text</b>');
  expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).toBe(
    'new <b onclick="alert(1)">text</b>');
  expect(element(by.css('#bind-default div')).getInnerHtml()).toBe(
    "new <b onclick=\"alert(1)\">text</b>");});