Are these IBM XPages requests valid HTTP requests?

My errors are becoming more and more ridiculous every minute. I now have the ultimate problem with my reverse proxy.

An IIS8 reverse proxy should send all requests coming for

(.*)\.nsf(.*)  (.*)\.ibmxspres(.*)  

to the lotus notes http server - which it does, at least for basic requests that every third-grader deems valid.

But now, guess what happens when I open the following "URL" (a) on the Notes HTTP directly and (b) via IIS8 Reverse proxy:

http://www.mydomain.com/xsp/.ibmxspres/.mini/css/2Ojcore.css&2Ojdojo.css&2OldefaultTheme.css&2OldojoTheme.css&@Da&@Ib&@Th&@Ti&2TgxspSF.css&Wdojoroot/dojo/resources/dojo.css&Wdojoroot/dojox/grid/enhanced/resources/claro/EnhancedGrid.css&Wdojoroot/dojox/grid/enhanced/resources/tundra/EnhancedGrid.css&Wdojoroot/dojox/grid/enhanced/resources/EnhancedGrid_rtl.css&Wdojoroot/dojox/grid/resources/tundraGrid.css&Wdojoroot/dojox/grid/resources/claroGrid.css&Wdojoroot/dojox/grid/resources/Grid.css.css  

Is this an URL that every HTTP server should be able to handle?

If yes, why isn't IIS routing them through, although they match the rule? If no, why is IBM using such non-standard HTTP requests, and can I change this behaviour somewhere?

Answer