How to enable CORS with Laravel for AngularJS 'Access-Control-Allow-Origin'

Recently, I installed Laravel CORS by barryvdh. While the module appears to be functioning correctly, I am still encountering the Access-Control-Allow-Origin error.

When attempting to make a request to , I receive the error message stating that no 'Access-Control-Allow-Origin' header is present on the resource. This prevents my origin 'http://www.example.com:8000' from accessing it.

Below is a snippet of my Angular code used to execute the function:

var SomeApp = angular.module('SomeApp',['ngResource','ngSanitize'])
SomeApp.factory('SomeAppService', ['$resource', function($resource){

    return {          
       firstActions : $resource(svrid('acns') + '/action/:payload',{payload:'@payload'},
                {
                    'remove': {method:'DELETE',isArray:true, cache:false},
                    'save' : {method:'POST', isArray:true, cache:false},
                    'query' : {method:'GET', isArray:true,cache:false},
                }, {cache:false}        
        ),

        //additional functions here
    };

 }]);

Upon further investigation into the code, it seems that the expected headers are not being included in the XHR request (see image below).

What could be causing this issue?

Update 1: Upon narrowing down the problem, it seems to be related to barryvdh's laravel-cors utilizing asm89's stack-cors where the config\cors.php may not be properly passed to asm89. Although not entirely sure of the problem, I attempted some manual overrides which allowed the `OPTIONS` method to work when manually passing the array in `config\cors.php` to asm89, but this caused other methods to fail.

Update 2: To address the issue, I manually altered a section under `Asm89\Stack\CorsService` as follows:

private function normalizeOptions(array $options = array())
    {
            $options += array(
            'allowedOrigins' => array('*'),
            'supportsCredentials' => true,
            'allowedHeaders' => array('*'),
            'exposedHeaders' => array('*'),
            'allowedMethods' => array('*'),
            'maxAge' => 0,
        );
        // Additional code for normalization

        return $options;
    }

I also commented out a small section:

public function handlePreflightRequest(Request $request)
{
    /*if (true !== $check = $this->checkPreflightRequestConditions($request)) {
    return $check;
    }*/

    return $this->buildPreflightCheckResponse($request);
}

This configuration worked perfectly for preflight `OPTIONS` and `GET` methods, but encountered errors with `POST` and `DELETE` methods, showing the 'Access-Control-Allow-Origin' error message. The response had an HTTP status code of 500.

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://www.example.com:8000' is therefore not allowed access.

These issues arose after the preflight `OPTIONS` request.

Answer №1

Make sure to include the necessary CORS response headers on the server end.

Answer №2

Encountered a situation where all cross-domain AJAX requests were successful, except for POST requests. The POST responses were missing the 'Access-Control-Allow-Origin' header, while GET and DELETE requests worked fine.

After some investigation, it was discovered that the issue stemmed from disabling deprecated warning suppression in php.ini file. Using

$data = Input::json()->all();

in the controller triggered a

 PHP Deprecated:  Automatically populating $HTTP_RAW_POST_DATA is deprecated and will be removed in a future version. To avoid this warning set 'always_populate_raw_post_data' to '-1' in php.ini and use the php://input stream instead. in Unknown on line 0

warning, followed by a

PHP Warning:  Cannot modify header information - headers already sent

warning being displayed.

To resolve the issue, the solution involved suppressing the deprecated warnings in php.ini, ensuring that custom headers could be successfully sent with the POST requests.

While acknowledging the need to address the deprecated problem in the future, for now, this workaround effectively allowed for retrieving POST data from JSON requests in Laravel.

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