Read cookies in an Apex @RestResource

Question

I'm trying to read some cookies set by previous requests in an Apex REST handler. I can see the cookie is sent to the page by my browser (using the Cookie HTTP header), but if within the Apex code I enumerate the headers I see many of those, but no Cookie.

Is that at all possible?

Answer 1

This is more reference information than a good answer to your question, but this is how some code I work on uses a cookie...

The code that sets the cookie is in a HTTP callback and so has a PageReference available:

PageReference pr = ApexPages.currentPage();
pr.setCookies(new Cookie[] {
        new Cookie(
                SESSION_KEY_NAME,           // name
                sessionId,                  // value
                null,                       // path
                -1,                         // max age (session cookie)
                true                        // https only
                )
        });

and then later @RestResource classes access the cookie like this:

RestRequest req = RestContext.request;
String sessionId = req.headers.get(Session.SESSION_KEY_NAME);

(The cookie name gets prefixed with "apex__" by the time it gets to the browser but this is hidden internally.)

PS

Accessing the cookie via the header is only possible because my (AngularJs) client puts it there:

var cvEepSid = $cookies['apex__Cv-Eep-Sid'];
$http.defaults.headers.common = {'Cv-Eep-Sid': cvEepSid};

I'd forgotten about this...