Desde JavaScript utilicé:

xhr.setRequestHeader("Authorization", make_base_auth(username,password));

Sin embargo, la solicitud HTTP no tiene unAuthorization encabezamiento:

OPTIONS /restService/index?_=1362589672203 HTTP/1.1
Host: myappinheroku.herokuapp.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:19.0) Gecko/20100101 Firefox/19.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: es-MX,es-ES;q=0.8,es-AR;q=0.7,es;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Origin: http://127.0.0.1:8081
Access-Control-Request-Method: GET
Access-Control-Request-Headers: authorization,content-type
Connection: keep-alive

Parece que la autenticación está siendo ignorada por completo. ¿Qué está mal? ¿Cómo habilitamos la autenticación para CORS?

Esta es la respuesta del servidor de la solicitud anterior:

HTTP/1.1 401 Full authentication is required to access this resource
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: origin, authorization, accept, content-type, x-requested-    with
Access-Control-Allow-Methods: GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS
Access-Control-Allow-Origin: *
Access-Control-Max-Age: 3600
Server: Jetty(7.x.y-SNAPSHOT)
Set-Cookie: JSESSIONID=6smxjnlqelmc1lg98ain16wv7;Path=/
WWW-Authenticate: Basic realm="Ralph's Bait and Tackle"
Transfer-Encoding: chunked
Connection: keep-alive