wodWebServer always saves content in the file on local
disk. If Filename property isn't set by your code,
wodWebServer creates temporary file in temporary directory,
uses it as storage space, and then deletes the file when
is destroyed. Filename is set by wodWebServer only if
client's request contains body data. Since most HTTP
requests are to GET resource
from the website, bodies are usually empty.
You can access contents of this file directly by
reading/writing to a file on disk, or you can use Body property
which is wrapper that loads and saves body for you - but
presents it as String variable.