Apigee Pre-Flight Options Requests-open source projects flightjs/flight

I create api proxies and check the box that says “Enable Direct Browser Access for Your API — Allow direct requests from a browser via CORS.” but my OPTIONS requests are still failing with :

{
    "fault": {
        "faultstring": "Received 405 Response without Allow Header",
        "detail": {
            "errorcode": "protocol.http.Response405WithoutAllowHeader"
        }
    }
}

From what I understand about CORS Pre-Flight Options requests, the client first sends the OPTIONS request to the server as a safeguard for “safe” CORS. This request should return a response with the list of request types that are available.

My Question: How do I make it so that Apigee responds correctly to OPTIONS requests and does not pass the OPTIONS request to my api behind the proxy?. If it helps I have AngularJS javascript apps trying to communicate with my Apigee endpoint.

Javascript errors:

OPTIONS http://api.example.com No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://client.example.com' is therefore not allowed access.

XMLHttpRequest cannot load http://api.example.com. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://client.example.com' is therefore not allowed access. 

Default “Add CORS” xml

    Add CORS
    
    
    
        
            *
            origin, x-requested-with, accept
            3628800
            GET, PUT, POST, DELETE
        
    
    true
    

Default Proxy Endpoints xml

    
    
    
        
        
    
    
        /v1/cnc
        default
        secure
    
    
        default
    
    
        
        
    

Default Target Endpoint xml

    
    
    
        
        
            
                Add-CORS
            
        
    
    
        http://api.example.com/v1/assets.json