There are a few experimental features in Runwar that are available for your servers.
CommandBox uses a custom resource manager in Undertow to resolve "real" paths (relative) in the servlet context with the path on the file system (absolute). This includes log concerning where the root of the WAR is, where the CF engine web root is, and any web aliases. If you enable a --debug or --trace server start, it is possible to get additional low-level information in the logs about every single file path that is resolved through the servlet context's resource manager. This logging is disabled by default since it is quite verbose.
Or in the server.json as:
By default, the web server in CommandBox will follow the case sensitivity of the underlying file system. So, when on Windows /FiLe.TxT will still load an actual file called /file.txt. But on Linux, the case in the browser would need to match that of the file system. CommandBox allows you to force case sensitivity to be ON or OFF for a server, overriding the server's file system.
Note, this controls all access of static file, such as images, js, css, txt, etc as well as the initial lookup of .cfm files. It will also affect all internal usage of ServletContext.getRealPath( "/myPath.txt" ). It will NOT affect CFML file operations such as <CFFile>, <CFDirectory>, fileRead(), directoryList(), etc. It will also not affect core CF engine functionality such as creating CFCs or cfincluding CFM templates. Any code directly accessing the file system will use the file systems case sensitivity. And creating CFC instance is never case sensitive in CFML.
To force CommandBox's web server to be case sensitive, even on operating systems like Windows, use the following setting. There is a nominal performance benifit in doing this and can allow a Windows CommandBox server to mimic a Linux server for testing.
To force CommandBox's web server to be case insensitive, even on operating systems like Linux, use the following setting. There is a nominal performance overhead in doing this and can allow a Linux CommandBox server to mimic a Windows IIS server. In this mode, CommandBox will use an internal cache of file system lookups to improve performance. If there are two files of the same name using different case, then you will get whatever file is found first.
You can activate a cache for all file path resolution in the resource manager by activating this setting. This is only for production and will eliminate repeated file system hits by your CF engine, such as checking for an Application.cfc file on every request, or testing where the servlet context root is. This will NOT affect any of the CFML fileRead() sort of commands or any code in the CF engine that bypasses the ServletContext and directly hits the file system. The default is false.
Standard Adobe ColdFusion installations have a similar cache of "real" paths from the servlet context that is tied to a setting in the administrator called "Cache Webserver paths" but that setting is not available and does not work on CommandBox servers for some reason..