角度消毒的目的是什么?

时间:2015-10-19 08:32:39

标签: javascript angularjs

我刚刚浏览了角度和开放层指令 HERE 的示例,并遇到了以下示例:

<!DOCTYPE html>
<html ng-app="demoapp">
  <head>
    <script src="../bower_components/openlayers3/build/ol.js"></script>
    <script src="../bower_components/angular/angular.min.js"></script>
    <script src="../bower_components/angular-sanitize/angular-sanitize.min.js"></script>
    <script src="../dist/angular-openlayers-directive.js"></script>
    <link rel="stylesheet" href="../bower_components/openlayers3/build/ol.css" />
    <script>
        var app = angular.module('demoapp', ['openlayers-directive']);
        app.controller('DemoController', [ '$scope', function($scope) {
            angular.extend($scope, {
                center: {
                    lat: 0,
                    lon: 0,
                    autodiscover: true
                }
            });
       }]);
    </script>
  </head>
  <body ng-controller="DemoController">
    <openlayers ol-center="center"  height="400px"></openlayers>
    <h1>Center autodiscover example</h1>
    <form>
        Latitude : <input type="number" step="any" ng-model="center.lat" />
        Longitude : <input type="number" step="any" ng-model="center.lon" />
        Zoom : <input type="number" step="any" ng-model="center.zoom" />
        <button ng-click="center.autodiscover=true">Discover position</button>
    </form>
  </body>
</html>

该示例可视为实时示例 HERE

我的问题是关于正在加载的文件,我不太明白为什么要加载以下脚本:

<script src="../bower_components/angular-sanitize/angular-sanitize.min.js"></script>

上述脚本的目的是什么?

编辑:: :我在角色 HERE 中找到了此模块的git repo和文档。 ,但我仍然不了解这个脚本的目的,文档甚至没有一个例子。

我已经在jQuery中编写了相当多的代码,那么有人可以用jQuery术语解释这个吗?

1 个答案:

答案 0 :(得分:30)

如果包含angular-sanitize脚本,则通过将HTML解析为标记来清理输入。然后将所有安全令牌(来自白名单)序列化为正确转义的html字符串。这意味着没有不安全的输入可以使它进入返回的字符串。

我在下面列出了一个受此blog post启发的小例子。如果使用var app = angular.module("app", ["ngSanitize"]);运行此脚本,则会正确呈现html链接。但是,如果您对此语句发表评论并取消注释var app = angular.module("app", []);,则会引发以下错误消息:Error: [$sce:unsafe] Attempting to use an unsafe value in a safe context.

<!DOCTYPE html>
<html>

<head>
  <link rel="icon" type="image/x-icon" href="favicon.ico">

  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.1/angular.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.1/angular-sanitize.min.js"></script>
  <!-- BEGIN disable refresh -->
  <script type="text/javascript">
    //Including ngSanitize ensures html links get properly sanitized
    var app = angular.module("app", ["ngSanitize"]);
    //If you use this code instead no html links get displayed 
    //var app = angular.module("app", []);

    app.controller("mainController", function($scope) {
      var main = this;

      main.links = [
        "<a href='http://google.com'>Google</a>",
        "<a href='http://odetocode.com'>OdeToCode</a>",
        "<a href='http://twitter.com'>Twitter</a>"
      ];
    });
  </script>

</head>

<body ng-app="app">
  <section ng-controller="mainController as main">
    <nav>
      <ul>
        <li ng-repeat="link in main.links" ng-bind-html="link">
        </li>
      </ul>
    </nav>
  </section>
</body>

</html>