Navigating CORS in the context of django, angular, and gulp

I'm currently working on a project with Django and AngularJS 1 for the front-end. I'm also using Gulp for browser Sync features. The code snippet below shows how I set up the Gulp server to work alongside the Django server as a proxy.

gulp.task('browser-sync', function() {
browserSync.init({
    proxy: "localhost:8000"
});
});

However, I've encountered a CORS issue. The error message I see is:

XMLHttpRequest cannot load http://localhost:8000/static/js/data.json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access.

The data.json file mentioned is used for frontend data as I haven't built the backend yet.

Here's an example of how I'm fetching data from the JSON file using Angular's $HTTP service:

marksApp.factory('getSubjectsService', ['$http',function($http){
return {
    getSubjectNames : function(stdNum){
        return $http.get('http://localhost:8000/static/js/data.json')
        .then(function(data){
            return data.data;
        });
    }
};
}]);

Answer №1

To ensure proper communication between your Django response and external sources, it's important to include CORS headers.

One useful tool for managing CORS headers in Django is the django-cors-headers app. You can find more information about it at https://github.com/ottoyiu/django-cors-headers

Answer №2

I'm currently utilizing http-proxy-middleware for proxying.

Within my setup, I have a django rest framework:

url(r'^api/', include(router.urls)),

Additionally, I am employing gulp proxy:

var proxyMiddleware = require('http-proxy-middleware');
..snip..
server.middleware = proxyMiddleware('/api', {target: 'http://localhost:8000', changeOrigin: true});

In this configuration, localhost:3000/api is proxied to localhost:8000/api, eliminating the need for CORS headers.

A similar approach can be implemented in your case:

$http.get('/static/js/data.json')

server.middleware = proxyMiddleware('/static', {target: 'http://localhost:8000', changeOrigin: true});

Best of luck with your implementation.

For more information, refer to: https://github.com/chimurai/http-proxy-middleware/blob/v0.9.0/README.md

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