JavaScript Cross-Origin Request Blocked error when calling remote service

Remoting SDK
1

Hi,
I have problem when calling remote service from my local web app (tested on apache http://localhost:88/ro/index.html and directly opened in browser)
I get error in browsers developer tools console
firefox:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://xx.xx.xx.xx:9000/json?1489010484704. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

chrome:
XMLHttpRequest cannot load http://xx.xx.xx.xx:9000/json?1489011528395. No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘http://localhost:88’ is therefore not allowed access.

This is service calling javacript code:

function getServerDateTime(){
var Channel = new RemObjects.SDK.HTTPClientChannel(“http://x.x.x.x:9000/json”);
var Message = new RemObjects.SDK.JSONMessage();
var Svc = new MyService(Channel, Message);
Svc.GetServerDateTime(function(result) {
alert("res " + result);
},
function(msg) {
alert("err " + msg.getErrorMessage())
}
);
}

In firefox I got answer from remote service:
{“version”:“1.1”,“id”:"{CB7B0941-0F97-4FA8-BE8B-7E44DDA4F1D1}",“result”:{“Result”:“2017-03-08T23:08:03.785”}}
And chrome doesn’t get response from service

2

Hello

Did you enable CORS support on the server side? It is disabled by default.

3

Thank you Anton! This has solved my problem with CORS.
I have another problem with my service test. When html file is loaded it throws error in dev tools console:
TypeError: __namespace.SimpleLoginService is not a constructor[Learn More] MySvc_intf.js:266:38

error line in generated MySvc_intf.js
__namespace.LoginService.prototype = new __namespace.SimpleLoginService();

I see that there are SimpleLoginService references and definitions in:

DataAbstract.js

case 2: //userID, password
svc = new RemObjects.DataAbstract.Server.SimpleLoginService(this.fLoginService);

and in DataAbstract4_intf.js

// Service: SimpleLoginService
__namespace.SimpleLoginService = function SimpleLoginService(__channel, __message, __service_name) {
RemObjects.SDK.ROService.call(this, __channel, __message, __service_name);
this.fServiceName = this.fServiceName || __service_name || “SimpleLoginService”;
};

__namespace.SimpleLoginService.prototype = new __namespace.BaseLoginService();

this is my js includes
< script type=“text/javascript” src=“RemObjectsSDK.js”>< /script>
< script type=“text/javascript” src=“DataAbstract.js”>< /script>
< script type=“text/javascript” src=“DataAbstract4_intf.js”>< /script>
< script type=“text/javascript” src=“MySvc_intf.js”>< /script>

4

Hello

Seems there is an issue with the JS codegen.

You need to fix your Intf.js file. Your services there are defined like

__namespace.DataService.prototype = new __namespace.DataAbstractService();

You need to change their definitions by explicitly defining the prototype namespace:

__namespace.DataService.prototype = new RemObjects.DataAbstract.Server.DataAbstractService();

This should resolve the issue.

Sorry for inconvenience

5

Thanks, logged as bugs://77380

6

bugs://77380 got closed with status notfixable.

7

Logged as bugs://i65101.

8

bugs://i65101 was closed as fixed.