What is the best way to handle sequential $http calls in AngularJS? Specifically, I want to make the second $http call dependent on the response of the first

When making two $http calls, the second call should only be executed based on the response from the first call if there is an error present.

Answer №1

For optimal handling of your request, it is recommended to utilize the .then() method. By using .then, you have the ability to specify multiple functions that will be executed - the first one in case of success, and the second one in case of an error. Here is an example:

//Initiating the first HTTP call
$http.get('http://your-url.com')
  .then(function (response) {
    //Success: perform necessary actions here
  }, function (response) {
    //Error: Retrieve relevant data from the response and proceed with a second HTTP call:
    var data = response.data;
    var statusCode = response.status;
    var statusText = response.statusText;
    $http.get('http://your-second-url.com');  
  });

The response object passed into these functions contains the following properties:

data – The response body
status – The status code of the response (e.g. 404)
headers – Headers included in the response
statusText – Text description of the response status

Answer №2

Here is an example of how you can achieve this:

var getData = $http.get('firstUrl.com');

getData.then(
  function(response) {
    $scope.movieContent = response.data;
  })
  .catch(function (error) {
    fetchSecondUrl();
    console.log("Oops! Something went wrong.");
  });

After that :

var fetchSecondUrl = function(){

   var fetchData = $http.get('secondUrl.com');

   fetchData.then(
   // retrieve the data and perform other necessary actions
  );

}

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