Dealing with errors effectively in AngularJS $http requests

Question

Dealing with errors effectively in AngularJS $http requests

What is the best approach for handling connection errors in Angular?

When using the $http POST service:

    dossierService.getDossier(uid)

    .then(function (result) {

        vm.dossier = result.dossier;

    }, function (error) {

        handleError(error)

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

If a connection problem occurs, an error will be returned:

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

How can I display the specific error message to the user to communicate what exactly went wrong?

javascript angularjs

Answer 1

Answer №1

$http.post("/newPath", {content:"info"}).then(function(response){
    // handle success response
}).catch(function(error) {

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

});

and also on your screen ...

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

Answer 2

$http.post("/newPath", {content:"info"}).then(function(response){
    // handle success response
}).catch(function(error) {

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

});

and also on your screen ...

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

Answer 3

Answer №2

One way to handle HTTP response codes is by creating an object with corresponding messages and using an interceptor to throw errors when needed.

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 pertains to specific operations, handle and launch errors accordingly. For custom errors, you can use a code and message object like:

{
   code: 30002,
   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);
    }

});

This approach seems effective.

Answer 4

One way to handle HTTP response codes is by creating an object with corresponding messages and using an interceptor to throw errors when needed.

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 pertains to specific operations, handle and launch errors accordingly. For custom errors, you can use a code and message object like:

{
   code: 30002,
   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);
    }

});

This approach seems effective.

Dealing with errors effectively in AngularJS $http requests

Answer №1

Answer №2

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