So you’ve followed Oracle’s lead and started implementing REST services in Oracle Service Bus. But you very quickly run into a problem, how do I get my webpages to access these services via Ajax when they are hosted on different domains (or ports). This is generally forbidden in most browsers (as it violates the ‘same origin policy’, ie: you can only access resources in the same domain as you). The most common recommendation to resolve this issue is to enable CORS (Cross Origin Resource Sharing). Basically you just set a header in the response from the remote service that lists the domains that are allowed to request from this resource. If the web page is in that list the browser will allow the resource to be accessed.
Getting this to work in OSB is actually pretty easy and will mean that your OSB services don’t have to be on the same domain as your web pages. Read on to find out how.