Properly handle error in $http call AngularJS

Question

Is there a good way to catch errors in Angular regarding connection problems?

Service $http POST:

    dossierService.getDossier(uid)

    .then(function (result) {

        vm.dossier = result.dossier;

    }, function (error) {

        handleError(error)

    });//end dossierService.getDossier(uid)

If there is a connecting problem it will return an error:

POST http://192.168.25.1:8080/api/query net::ERR_CONNECTION_TIMED_OUT

How can I show the correct message to the user letting him/her know what the exact error is?

Possible duplicate of In angular $http service, How can I catch the "status" of error? — Anik Islam Abhi
– Anik Islam Abhi, Commented Jan 20, 2016 at 8:53

danday74 · Accepted Answer · 2016-01-20 10:34:40Z

1

$http.post("/path", {data:"data"}).then(function(response){
    // do something with success response
}).catch(function(error) {

  console.log(JSON.stringify(error));
  $scope.myerror=error

});

and in your view ...

<div ng-if="myerror!=null">
    {{myerror}} OR {{myerror.message}}
</div>

answered Jan 20, 2016 at 10:34

danday74

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Comments

Serginho · Accepted Answer · 2016-01-20 10:49:37Z

1

You can create an object with the http response codes and link a message. To throw these errors you can use an interceptor.

moduleError.factory('HttpErrorHandler', function (){
    return {
        401: 'You are not logged in',
        403: 'You do not have permissions'
    }
});



$httpProvider.interceptors.push(function($q, HttpErrorHandler) {
  return {
   'responseError': function(rejection) {
      console.log(HttpErrorHandler[rejection.status]);
  };
});

If the error is related to this operations, launch errors where you are launching. You can throw the code 400 for your errors with a object in the body like:

{
   code: 30002, //Thats your custom code
   message: 'My custom error message'
}

.

dossierService.getDossier(uid)

.then(function (result) {

    vm.dossier = result.dossier;

}, function (error) {

    if(error.status == 400){
      var my_error = JSON.parse(error.data);
      console.log(my_error.message);
    }

});

I think this is a good aproach.

edited Jan 20, 2016 at 10:49

answered Jan 20, 2016 at 9:16

Serginho

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1 Comment

danday74 Over a year ago

i think this is a good answer but badly explained lol. Please explain where you would access the error object, possibly using a console.log statement to do so. Also I believe this is meant to be a generic approach to handle ALL http errors without having to handle them inside a promise rejection every time. Please confirm Serginho

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