Spencer Mark Spencer Mark - 6 months ago 92
AngularJS Question

AngularJs $http.post() does not send data

I'm pulling my hair out - could anyone tell me why the following statement does not send the post data to the designated url? The url is called but on the server when I print $_POST - I get an empty array. If I print message in the console before adding it to the data - it shows the correct content.

$http.post('request-url', { 'message' : message });


I've also tried it with the data as string (with the same outcome):

$http.post('request-url', "message=" + message);


It seem to be working when I use it in the following format:

$http({
method: 'POST',
url: 'request-url',
data: "message=" + message,
headers: {'Content-Type': 'application/x-www-form-urlencoded'}
});


but is there a way of doing it with the $http.post() - and do I always have to include the header in order for it to work? I believe that the above content type is specifying format of the sent data, but can I send it as javascript object?

Answer

I had the same problem using asp.net MVC and found the solution here

There is much confusion among newcomers to AngularJS as to why the $http service shorthand functions ($http.post(), etc.) don’t appear to be swappable with the jQuery equivalents (jQuery.post(), etc.)

The difference is in how jQuery and AngularJS serialize and transmit the data. Fundamentally, the problem lies with your server language of choice being unable to understand AngularJS’s transmission natively ... By default, jQuery transmits data using

Content-Type: x-www-form-urlencoded

and the familiar foo=bar&baz=moe serialization.

AngularJS, however, transmits data using

Content-Type: application/json 

and { "foo": "bar", "baz": "moe" }

JSON serialization, which unfortunately some Web server languages—notably PHP—do not unserialize natively.

Works like a charm.

CODE

// Your app's root module...
angular.module('MyModule', [], function($httpProvider) {
  // Use x-www-form-urlencoded Content-Type
  $httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=utf-8';

  /**
   * The workhorse; converts an object to x-www-form-urlencoded serialization.
   * @param {Object} obj
   * @return {String}
   */ 
  var param = function(obj) {
    var query = '', name, value, fullSubName, subName, subValue, innerObj, i;

    for(name in obj) {
      value = obj[name];

      if(value instanceof Array) {
        for(i=0; i<value.length; ++i) {
          subValue = value[i];
          fullSubName = name + '[' + i + ']';
          innerObj = {};
          innerObj[fullSubName] = subValue;
          query += param(innerObj) + '&';
        }
      }
      else if(value instanceof Object) {
        for(subName in value) {
          subValue = value[subName];
          fullSubName = name + '[' + subName + ']';
          innerObj = {};
          innerObj[fullSubName] = subValue;
          query += param(innerObj) + '&';
        }
      }
      else if(value !== undefined && value !== null)
        query += encodeURIComponent(name) + '=' + encodeURIComponent(value) + '&';
    }

    return query.length ? query.substr(0, query.length - 1) : query;
  };

  // Override $http service's default transformRequest
  $httpProvider.defaults.transformRequest = [function(data) {
    return angular.isObject(data) && String(data) !== '[object File]' ? param(data) : data;
  }];
});