I try to send http request with $http (angular) with this code:
$http({
method: 'GET',
url: 'http://192.168.0.17:9000',
header: {'Access-Control-Allow-Origin': "*"},
}).then(getEventsSuccess, getEventsError);
But this doesn't work and I have in the web console this error:
XMLHttpRequest cannot load http://192.168.0.17:9000/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access.
Do you have a solution ?
You see this error due to a security mechanism implemented in your browser, called Same Origin Policy.
Basically, it is caused since your webpage tries to access a resource which resides on a server that is on a different Host, Port or Scheme (HTTP / HTTPS / file etc) than the webpage itself.
In order to solve this issue, you can do one of the following:
Serve your Webpage from the server that you are trying to access. If your webpage URL will be http://192.168.0.17:9000/X.html, your request should be successful and the error will disappear.
Add a special header to the response sent from your server, called Access-Control-Allow-Origin.
Read more here:
https://en.wikipedia.org/wiki/Same-origin_policy
https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
Related
I want to get api_kye and I use moqui framework in backend , use axios in react js project :
axios.get(SERVER_URL + '/rest/api_key', {
headers: {
Authorization: "Basic " + btoa(username + ":" + password) ,
'Content-Type' : 'application/x-www-form-urlencoded' ,
},
}).then(response => {})
then , when requested the below error happened :
Access to XMLHttpRequest at '...' from origin '...' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header has a value '...' that is not equal to the supplied origin.
This is not a reactJS error, this is a problem with your backend code, you need to look at the Moqui docs to see how you can allow the origin you are calling from to access your API
Enable CORS in the server side
Let's head back to our server's app.js file.
app.get('/cors', (req, res) => {
res.set('Access-Control-Allow-Origin', '*');
res.send({ "msg": "This has CORS enabled 🎈" })
});
Also check the redirect URL in server side
Refer this link
when ever you send an HTTP request to an API the server response should include your domain in response header otherwise chrome will raise this error: "Access to XMLhttprequest has blocked for origin ...."
so first of all make sure that your domain is included in server code.
if it's included already then the reason could be that server can't process your response correctly. maybe it crashed so the response is corrupted and chrome can't find your domain in response header and it raises that error
So i have a solution for this but you may or may not be able to build it.
CORS is a security feature, you should be receiving requests thru your backend and not the browser directly in general...
IF the data is not sensitive and you want to open an endpoint to the world without getting CORS errors you can do one of two things
Set the CORS headers from the server side. You'll need to understand HTTP requests and headers. you set these from the server. enabling cross origin with * will work.
Build a proxy. I've done this in AWS API gateway, I'll link another post. works good. basically AWS will act as your back end and take the response with CORS blocked. you will then proxy the request and strip the CORS header. When you call the api you will actually call AWS which calls the API, then AWS will pass the response back to you with CORS enabled.
Angular No 'Access-Control-Allow-Origin'
just follow these steps and it will work.
Im new in Angular 2 framework and I try tu understand Http object.
Im following the tutorial here:
http://www.joshmorony.com/using-http-to-fetch-remote-data-from-a-server-in-ionic-2/
Its perfect to retrieve JSON file from a server that provide this kind of data but I want to retrieve the HTML content into a variable. I would like to have all the html file and parse it to get some informations.
When I modify the URL in the example by a website like this:
this.http.request('https://www.google.ca/' ).map(res => res.text()).subscribe(data => {
this.webPage = data.toString();
console.log("data:" + data );
});
I got this error:
EXCEPTION: Response with status: 0 for URL: null
Do I use the good API?
What im doing wrong?
Thanks,
Pat
This is a CORS problem.
The full error is:
XMLHttpRequest cannot load https://www.google.ca/.
No 'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'https://run.plnkr.co' is therefore not allowed access.
EXCEPTION: Response with status: 0 for URL: null
You cannot request 'https://www.google.ca/' because: 1) when you make a http request in your app, the origin is already defined as your host, could be 'localhost' or your site's host. 2) 'www.google.ca' is another origin, and it has no 'Access-Control-Allow-Origin' set, or you site's host is not in their 'Access-Control-Allow-Origin' list.
If you want the html of 'www.google.ca', you need a proxy server, and the steps are: 1) in your ng2 app, you send a request to proxy server and ask it to do ... 2) you proxy server request 'www.google.ca' and send the html to your ng2 app.
When the proxy server request 'www.google.ca', the origin is defined as 'www.google.ca'. So the proxy server can get the html.
I am builiding hybrid app with angularjs and i am trying to call the service from external source. but when i make a call to url i am getting error
XMLHttpRequest cannot load https:XXXX/xxx.json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access.
here is my code
app.controller('overview', function($scope, $http) {
$http({
method : "GET",
url : "https://ysaf.XXXX.yourcxxxxx/resource.json"
}).then(function appSucces(response) {
$scope.resources = response.data;
}, function appError(response) {
$scope.resources = response.statusText;
});
});
if i call the local .json file i am not getting any error but, only when i call the external api, i am getting this error.
is there anything i am doing wrong in this code?
Access-Control-Allow-Origin is set on the response from server, this is not on client request to allow clients from different origins to have access to the response.
In this case, https://ysaf.XXXX.yourcxxxxx/resource.json does not allow your origin to have access to the response. Therefore you cannot read it.
Add the neccessary headers such as Access-Control-Allow-Origin: *.
The issue which you are facing is CORS issue. CORS - Cross Origin Resource Sharing.
CORS issue will occur on following cases
1) If we are abc.com and accessing xyz.com (different domain)
2) If we are in http://localhost:8080/myapplication and accessing http://localhost:9080/anotherapplication (different ports)
You should download this extension for your development :
https://chrome.google.com/webstore/detail/allow-control-allow-origi/nlfbmbojpeacfghkpbjhddihlkkiljbi
It will solve all Access-Control-Allow-Originproblems :)
Don't forget to disable it when you stop dev, it could be a problem for web navigation.
I am trying to create a search application in angularjs.However, i am getting the below error . Can someone please help.
AddrBook.html:1 XMLHttpRequest cannot load http://121.242.159.36:6006/AddressBookWS/rest/addressBookService/getCompany/%20%20%20%20%20%20%20%20%20%20JB. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.
Thanks
Srikala
(1)
No 'Access-Control-Allow-Origin' header is present on the requested resource.
You are making a cross domain request and this header must be present on the server's response.
The header should be ...
Access-Control-Allow-Origin: *
To allow any domain to make a request to the server.
This is your problem! If you have control over the server then add the response header. If not then make the request at your backend to circumvent the X-domain policy and then make the data available to your angular app.
...
(2)
Origin 'null' is therefore not allowed access -- This is because you are not setting the Origin header in your HTTP request
You can set default headers for all http requests in your app config.
Although (2) will not fix the issue just an FYI.
Following Restangular's documentation and includes an example of this:
// GET to http://www.google.com/ You set the URL in this case
Restangular.allUrl('googlers', 'http://www.google.com/').getList();
I am trying to do the same for angel.co
$scope.trial = Restangular.allUrl('googlers', 'https://api.angel.co/1/users/267770').getList();
And keep getting error
XMLHttpRequest cannot load https://api.angel.co/1/users/267770. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8000' is therefore not allowed access.
Any solutions?
The server (api.angel.co) is not responding with Access-Control headers which results in this error.
When sending XHR requests to domains different from the origin domain web browsers are checking if the service allows this. In your case api.angel.co would need to include the header Access-Control-Allow-Origin: * as part of the response (which it does not).
Assuming you cannot change api.angel.co, an alternative would be to build a server-side proxy (e.g. in node.js) which allows Cross-Origin Resource Sharing.
Check out this great article about Cross-Origin Resource Sharing (CORS).