I'm using restangular to consume an api hosted on the same server as the angular files. All requests to the api are getting Origin is not allowed by Access-Control-Allow-Origin errors. I've tried altering headers in the config
$httpProvider.defaults.useXDomain = true;
delete $httpProvider.defaults.headers.common['X-Requested-With'];
and updating angular/restangular. Is there a way to set the headers for same domain requests using restangulars setdefaultheaders method?
The error that your are getting is due to Cross Origin Resource Sharing (CORS) policies of your web server.
The resources being on the same server is not enough. They have to be served by the same host.
Is important to understand that api.mydomain.com is a different from www.mydomain.com.
Also having a different port (api.mydomain.com vs api.mydomain.com:9000) makes it a different host.
Check that the response of the response of your server contains the HTTP header:
"Access-Control-Allow-Origin: api.yourdomain.com"
To check how to enable a CORS on your web server check this useful website: enable_cors.org
You can read more about CORS
Related
I'm a n00b trying to learn React. I'm building a website that uses Etsy's APIs. Registered an app there and everything. They have a page that talks about CORS and proxying here: https://www.etsy.com/developers/documentation/getting_started/jsonp
So for example, I'm trying to do a fetch on a store's listings:
fetch('https://openapi.etsy.com/v2/shops/[shopId]/listings/active?api_key=[apiKey]')
But that violates the browser's CORS policy. No problem, says the documentation on Etsy. You can always use their proxy: beta-api.etsy.com. So I add that to my package.json file:
"proxy": "https://beta-api.etsy.com/"
And then I change my fetch line:
fetch('/v2/shops/[shopId]/listings/active?api_key=[apiKey]')
But CORS is still being violated in the browser.
Access to fetch at 'https://www.etsy.com/shop/beta-api/v2/shops/[shopId]/listings/active?api_key=[apiKey]' (redirected from 'http://localhost:3000/v2/shops/[shopId]/listings/active?api_key=[apiKey]') from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
I don't want an opaque response, either, so doing "no-cors" really doesn't help. Does anyone have any recommendations on how I can at least get a local website up and running?
You are getting that error because your server has set Access-Control-Allow-Origin to restrict cross-domain traffic. You are sending your request from your localhost so that is considered cross-domain.
If you are able to change your server settings to set Access-Control-Allow-Origin: * then you can make those requests without a CORS error but I don't suggest doing this.
The best solution would probably be a proxy server. You can use cors-anywhere heroku app to easily do this.
Excerpt from Medium Article on this issue
The cors-anywhere server is a proxy that adds CORS headers to a
request. A proxy acts as an intermediary between a client and server.
In this case, the cors-anywhere proxy server operates in between the
frontend web app making the request, and the server that responds with
data.
Similar to the Allow-control-allow-origin plugin, it adds the
more open Access-Control-Allow-Origin: * header to the response.
Say your frontend is trying to make a GET request to:
https://joke-api-strict-cors.appspot.com/jokes/random
But this api does not have a Access-Control-Allow-Origin value
in place that permits the web application domain to access it.
So instead, send your GET request to:
https://cors-anywhere.herokuapp.com/https://joke-api-strict-cors.appspot.com/jokes/random
The proxy server receives the
https://joke-api-strict-cors.appspot.com/jokes/random
from the url above. Then it makes the request to get that server’s
response. And finally, the proxy applies the Access-Control-Allow-
Origin: * to that original response.
I'm using ReactJs and Axios to send API requests to my server but I keep getting the same error:
Failed to load http://***: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access. The response had HTTP status code 400.
I'm trying to perform a POST request. I've also tried to download a Chrome Plugin to allow CORS. It did work for the GET requests, but not working for POST it looks like.
If I try to make requests to https://jsonplaceholder.typicode.com/users it's working fine. So I guess there's something wrong with the server.
My server is using Nginx and is on a CentOS 7 OS.
Q: How is it possible to enable CORS just for my local development (localhost) or specific websites?
EDIT: I have already tried using this config on my Nginx server - without luck: https://enable-cors.org/server_nginx.html
While I can't answer you with some specific code, here's what happens (at least what happened last time I tried Angular and had similar issues):
Before sending any further requests, there'll be a header only OPTIONS HTTP request sent to the server URL. When answering this call, the server is supposed to send a header field Access-Control-Allow-Origin containing a whitelist of domains allowed to do further calls using the API. To whitelist all requests in your dev environment it should be enough to set Nginx to answer with Access-Control-Allow-Origin: *.
For development I use the Firefox extension CORS Everywhere. It modifies all web traffic, to include the correct CORS headers. (It works at least with the somewhat dated Firefox in Opensuse 42.3.)
https://addons.mozilla.org/en-US/firefox/addon/cors-everywhere/
Note, that this subverts a security mechanism of the browser.
For deployment you must configure the server, to send the correct CORS headers. (I did never do this, the finished website is planned to work in a single IP.)
If you have access to the server and the server is using Nodejs, this should work for you:
CD into your server folder:
cd server-folder
Then run this command in order to install the 'cors' package:
npm install cors
In order to access this package, go into your server file in your IDE and in the next available line:
const cors = require('cors');
Next, add this line to use the middleware (assuming you are using Express):
app.use(cors());
I deployed a weather app created with create-react-app. In development I would use the chrome extension allow access control origin. Now that it is deployed with github pages, I'm getting the error:
No 'Access-Control-Allow-Origin' header is present on the requested
resource. Origin 'https://boka44.github.io' is therefore not allowed
access. If an opaque response serves your needs, set the request's
mode to 'no-cors' to fetch the resource with CORS disabled.
It seems like I need to add a header to my server, but I'm confused as to how and where to add it.
My code is here: https://github.com/Boka44/weather
Any help would be deeply appreciated.
The API endpoint (The one that provides weather information) which you are calling has disabled CORS which means you can never make a client-facing call (i.e. through a browser) because the browser will block the call.
You have 2 options here:
If you can change the API endpoint: you can add a CORS header to allow origins from your client app's domain.
If you cannot change the server code: Create your own API endpoint that calls the original API endpoint and have your client app call your own API. (i.e. You just make a proxy server that directs your calls to the original API endpoint). In this case, you can specify a CORS header on your server to allow calls from your client app domain only.
Dark Sky API docs says that it is not allowing CORS. So you can't get data to your client side code from their server. So create a proxy server in PHP or some other platforms, which will make an api call and produces the JSON formatted response.
I'm trying to fetch the list of official images from docker hub using v2 api. If I try to do curl or use postman, I get the response correctly, but when I try to fetch the list using angularjs service, I get the following error
XMLHttpRequest cannot load https://hub.docker.com/v2/repositories/library/?page=8&page_size=15. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://run.plnkr.co' is therefore not allowed access.
Can someone suggest solution for this. How can I enable cors for this?
CORS could be enabled on the server side, and this is not your case. What you could do is :
1) use a proxy, for instance NGNIX, and make Sure that all request Made to localhost/whatever are redirected to hub.docker.com . This way you can "cheat" Cross-origin block
2) if you need a temporary and dirty solution you could more simply install chrome/safari plugins to bypass CORS security check
There is only one way to bypass CORS is send request through a cors proxy like http://crossorigin.me
It's an opensource project and you can build your own proxy server by download the full source code from here: https://github.com/technoboy10/crossorigin.me
Reason behind the issue :
As per my understanding you are doing an AJAX call to a different domain than your page is on. So, the browser is blocking it for security reasons as it usually allows a request in the same origin.A tutorial about how to achieve that is using CORS.
When you are using curl or postman they are not restricted by this policy. Quoted from Cross-Origin XMLHttpRequest:
Regular web pages can use the XMLHttpRequest object to send and receive data from remote servers, but they're limited by the same origin policy. Extensions aren't so limited. An extension can talk to remote servers outside of its origin, as long as it first requests cross-origin permissions.
I have setup the Ionic development environment using Yeoman generator (https://github.com/diegonetto/generator-ionic). Everything is works well.
The problem is on Sever side request, I am getting the Cross-Origin Request Blocked error.
I add below link in .htaccess file and AngularJS app.js, still getting same error
Header set Access-Control-Allow-Origin "*"
Header set Access-Control-Allow-Headers: Authorization
AngularJS Provider
$httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=utf-8';
$httpProvider.defaults.withCredentials = true;
Error Message I am getting is
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at
http://192.168.1.18/tracker/user/login.
This can be fixed by moving the resource to the same domain or enabling CORS.
Screen of Request & Response Header
Please guide me any configuration need to be changed for enabling CORS. Our server side framework is Zend 1.x
The cross origin is forced by your browser, running the application from any distributed phone should not be blocked with your current settings.
To allow communication between your "served to browser" app to your server use a browser plugin
Allow-Control-Allow-Origin: * Chrome Plugin do the work
I have changed the .htaccess files as below and its worked out, Google Chrome is not accepting the '*', so I specified the exact URL
Header set Access-Control-Allow-Origin "http://localhost:8100"
Header set Access-Control-Allow-Credentials: true
While I don't have experience using Zend with Ionic, I did experience this issue when interfacing with an IIS hosted REST API via Ionic.
For me, I had to add "Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS" server side in addition to what you already have.
After adding the 'allow methods' header, I was able to fully utilize my API.
If this doesn't get it for you, report back and I will dig a bit deeper in my project to see if I've forgotten a client side change that were also required.