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AngularJS http.get validates json validity

When getting json from a url, I want to work with it when the data is valid.

my approach so far with JSON :

$http.get(
            'data/mydata.json'
                + "?rand=" + Math.random() * 10000,
            {cache: false}
        )
            .then(function (result) {

                try {
                    var jsonObject = JSON.parse(JSON.stringify(result.data)); // verify that json is valid
                    console.log(jsonObject)

                }
                catch (e) {
                    console.log(e) // gets called when parse didn't work
                }


            })

However, before I can do the parsing, angular already refuses

Error: {      Object.parse(native)     at fromJson (http://code.angularjs.org/1.2.0-rc.2/angular.js:908:14)      $HttpProvider.defaults.defaults.transformResponse(http://code.angularjs.org/1.2.0-rc.2/angular.js:5735:18)      http://code.angularjs.org/1.2.0-rc.2/angular.js:5710:12     Array.forEach(native)     at forEach (http://code.angularjs.org/1.2.0-rc.2/angular.js:224:11)     at transformData (http://code.angularjs.org/1.2.0-rc.2/angular.js:5709:3)     at transformResponse (http://code.angularjs.org/1.2.0-rc.2/angular.js:6328:17)     at wrappedCallback (http://code.angularjs.org/1.2.0-rc.2/angular.js:9106:81)      http://code.angularjs.org/1.2.0-rc.2/angular.js:9192:26 angular.js: 7861

angular JSON?

: :

$http.get(
// url:
'data/mydata.json'
    + "?rand=" + Math.random() * 10000

,

// config:
{
    cache: false,
    transformResponse: function (data, headersGetter) {
        try {
            var jsonObject = JSON.parse(data); // verify that json is valid
            return jsonObject;
        }
        catch (e) {
            console.log("did not receive a valid Json: " + e)
        }
        return {};
    }
}
)
+4
2

transformResponse $http. .

+4

, transformResponse , transformResponse , $http.get() , $http.get() json .

, :

myApp.factory('httpHandler', function($http, $q) {            
  function createValidJsonRequest(httpRequest) {
    return {
      errorMessage: function (errorMessage) {
        var deferred = $q.defer();

        httpRequest
          .success(function (response) {
            if (response != undefined && typeof response == "object"){
                deferred.resolve(response);
            } else {
                alert(errorMessage + ": Result is not JSON type");
            }
          })
          .error(function(data) {
            deferred.reject(data);
            alert(errorMessage + ": Server Error");
          });

        return deferred.promise;
      }
    };
  }

  return {
    getJSON: function() {
      return createValidJsonRequest($http.get.apply(null, arguments));
    },
    postJSON: function() {
      return createValidJsonRequest($http.post.apply(null, arguments));
    }
  }
});


myApp.controller('MainCtrl', function($scope, httpHandler) {
  // Option 1
  httpHandler.getJSON(URL_USERS)
    .errorMessage("MainCtrl -> Users")
    .then(function(response) {
      $scope.users = response.users;
    });


  // Option 2 with catch
  httpHandler.getJSON(URL_NEWS)
    .errorMessage("MainCtrl -> News")
    .then(function(response) {
      $scope.news = response.news;
    })
    .catch(function(result){
      // do something in case of error
    });


  // Option 3 with POST and data
  httpHandler.postJSON(URL_SAVE_NEWS, { ... })
    .errorMessage("MainCtrl -> addNews")
    .then(function(response) {
         $scope.news.push(response.new);
    });

});
0

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