RETROFIT & AUTH COOKIE

Question

I need to know how to add an authorization cookie header in retrofit. I have seen advice like using request intercepter etc. Below is what I am trying, but is this correct? First of all I already needed a RequestAdatper to get the session id the first time around. This can only be set by the builder of the request adapter. But I needed to make a request just to get the session id in the first place. Do I need two rest adapters one to get the sessionId and another one after I have obtained it. What I really need is a method on adapter to set the cookie after I get it but it does not appear to be such a method. This is getting awkward. How do I set authorization cookie in retrofit? I don't see this in FAQ or tutorials.

RequestInterceptor requestInterceptor = new RequestInterceptor()
{   
   @Override
   public void intercept(RequestFacade request) {
        request.addHeader("Set-Cookie", "sessionId="+sessionIdentifier);
   }
 };

RestAdapter.Builder().setServer(serverURL)..setRequestIntercepter(requestIntercepter).build();  

// but I don't have sessionId when this is first issued ???

Answer 1

Keep a reference to the interceptor and treat it as a singleton like you would be RestAdapter itself.

public class ApiHeaders implements RequestInterceptor {
  private String sessionId;

  public void setSessionId(String sessionId) {
    this.sessionId = sessionId;
  }

  public void clearSessionId() {
    sessionId = null;
  }

  @Override public void intercept(RequestFacade request) {
    if (sessionId != null) {
      request.setHeader(...);
    }
  }
}

Now, simply call setSessionId after your authentication call. All subsequent requests will include the header.

Answer 2

You can get the cookies like this

 public class MyCookieManager extends CookieManager {

    @Override
    public void put(URI uri, Map<String, List<String>> stringListMap) throws IOException {
        super.put(uri, stringListMap);
        if (stringListMap != null && stringListMap.get("Set-Cookie") != null)
            for (String string : stringListMap.get("Set-Cookie")) {
                if (string.contains("JSESSIONID")) {
                    Preference.getInstance().setSessionId(string);
                }
            }
    }
}

Use this to set the CookieHandler

 MyCookieManager myCookieManager = new MyCookieManager();
        CookieHandler.setDefault(myCookieManager);

and then use it like this in your request Interceptor

 String sessionId = preference.getSessionId();
                    if (sessionId != null)
                        requestFacade.addHeader(Cookie, sessionId);