I am getting problems when trying to send a file to a web server in HTTP POST request. The POST content could be large, so it is read in several parts from a previously generated file.
I supose that I haven't understood at all GetNextDataPart() and ReleaseData() methods inherited from MHTTPDataSupplier. I have modified HTTP client example in order to send a file when calling PostL method, but program crashed.
Has anybody done a HTTP POST request with a file? Could you help me?

Thank you.