I was on the right track. I eventually found the final puzzle piece here: http://stackoverflow.com/questions/24277953/how-to-define-cors-in-websphere-application-server-liberty-profile-v8-5
I installed Proxy Servlet on WAS and got it working. I found documentation for ProxyServlet here: ftp://public.dhe.ibm.com/software/integration/support/supportpacs/individual/ie01.pdf
There is more about the problem of cross-origin sharing here: http://evolpin.wordpress.com/2012/10/12/the-cors/. I think that the problem #1 and the solution #1 describe my situation succinctly.
I am calling an HTTPInput message flow deployed on a WMB Linux server from an HTML/Javascript page on a website running on a different server. For arguments sake, let's just say the different server i ...