'''http::POST''' is an extension of the standard '''http::geturl''' commans, providing an
easy way to gather all the POST parameters - including files to be uploaded -  and 
to set them up in a proper multipart data-structure that will be passed to the underlying '''http::geturl'''

No documentation provided yet, but you can download the code here [https://sourceforge.net/projects/irrational-numbers/files/http-post-1.0.zip/download], and read a short introduction at the following wiki page: [Tcl does OCR online]