Is it achievable to obtain the parameters in $http within Angular framework?

Looking for a solution

I currently have this code snippet:

let promise = $http.get('/api/users');

Is there a way to extract the parameters from the promise object? Here is what I envision:

let promise = $http.get('/api/users');

let parameters = promise.extractParameters();

/*

parameters = {
   method: 'GET',
   url: 'api/users',
   // and so on.
}

*/

Imagine creating a Pagination service where you can feed in a promise and dynamically update the URL with different parameters (such as moving to the previous or next page).

Thank you.

Edit Request:

Further clarification needed:

I want to pass the primary promise to a PaginationService.

this.paginator = {};

Paginator.create(this.paginator, function (page) {
   // This will serve as the main promise
   // page = 1
   return $http.get('/api/users', {
      params: {
         page: 1
      }
   });
});

// PaginatorService
this.create = function (scopePaginator, callback) {
   scopePaginator.next = function () {
      return callback(scopePaginator.current_page);
   };

   return callback().then(function (response) {
       // The response metadata holds all the necessary data (current_page, etc.)

       angular.extend(scopePaginator, response.data);

       return scopePaginator;
   });

}

This gives an idea of my approach...

Answer №1

The request's configuration object is embedded within the response object.

var promise = $http.get('/api/users');

promise.then(function onSuccess(response) {
    var config = response.config;
    console.log(config.method);
    console.log(config.url);
    console.log(config.params);
});

This allows for chaining successive $http calls using promises.

promiseNext = promise.then(function onSuccess(response) {
    var config = response.config;
    vm.data[config.params.page] = response.data;
    config.params.page++;
    //return promise for chaining
    return $http(config);
};

UPDATE

A function that fetches pages up to page number n:

var promiseUntilN = function(promise, n) {
    p = promise
        .then( function onSuccess(response) {
            var config = response.config;
            var page = config.params.page;
            vm.dataArray[page] = response.data;
            if ( page >= n ) {
                return vm.dataArray;
            } else {
                config.params.page++;
                return promiseUntilN($http(config), n);
            };
    return p;
};

Example of usage:

vm.dataArray = [];
var n = 10;
var promise1toN = promiseUntilN($http.get('/api/users',{page: 1}), n);

promise1toN.then( function onSuccess( dataArray ) {
    console.log(dataArray);
}).catch( function onReject(response) {
    var page = response.config.param.page;
    console.log("Error on fetch of page ", page);
});

Answer №2

Have you considered generating the parameters on your own?

$http({
  method: 'POST',
  url: '/api/customers'
}).then(function successCallback(response) {...});

Answer №3

Setting the parameters of the $http request must be done manually, but after that, you can simply pass it in for the request.

var requestParams = {
  method: 'POST',
  url: '/anotherUrl'
};
var resultPromise = $http.post(requestParams);

For additional information, refer to this link.

Answer №4

A more efficient method involves including parameters like "offset" and "count" in the header of your API request. The API will then return a specified range of data starting from the offset, along with the total count of data available. Here is an example:

let promise = $http.get('/api/users',headers: { 'offset': 0, 'count': 10} );

The API will query data based on the offset and count provided, returning a set of data structured like this:

{ yourProp1 : 'someData', yourProp2: 'someemail', count: 0, offset: 10, totalRowCount: 188}

You can then utilize the totalRowCount value for implementing Pagination.

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