Steps to enable ng-model input HTML in AngularJS

I am working on an HTML code snippet that includes a form input for audio link. However, when I try to enter a URL in the input field and submit the form, I encounter the following errors:

<div class="inner-content-linkaudio">
  <label for="linkaudio">Link audio</label>
  <input type="url" name="linkaudio" ng-model="linkaudio" class="form-control">
</div>
Error: [$interpolate:interr] Can't interpolate: {{postcurrent.linkaudio}}
Error: [$sce:insecurl] Blocked loading resource from url not allowed by $sceDelegate policy.  URL:

Could someone please advise me on how to allow URL entries and submit the form without encountering these errors? Your help is much appreciated. Thank you.

javascriptangularjsmeanmeanjs

Answer №1

Strict Contextual Escaping (SCE) is the reason behind this behavior. Angular takes security measures by refusing to load or render a string value unless it has been explicitly trusted as a resource URL according to the SCE policy.

If you want to trust all inputs as a resource URL, you can create a directive that extends the NgModelController.

angular.module('test', [])
  .directive('trustedUrl', ['$sce', function($sce) {
    return {
      require: 'ngModel',
      link: function(scope, element, attrs, ngModel) {
        ngModel.$parsers.push(function(value) {
          return $sce.trustAsResourceUrl(value);
        });
      }
    }
  }]);

This directive can be used like this:

<input type="url" ng-model="url" trusted-url />
<audio ng-src="{{ url }}" controls></audio>

You can test this functionality on this working Plunker by pasting an audio URL into the input field.

Alternatively, you can utilize 

$sceDelegateProvider.resourceUrlWhitelist([...])
to whitelist specific URLs that can be loaded into your application.

Answer №2

It is important to ensure that the postcurrent variable is properly defined within the scope.

$scope.postcurrent={linkaudio:""};

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