POST requests with a
multipart/form-data -type content have modifiable parameters and use a specific interface.
Each part is described by a name attribute and a value. It also features an optional specific content type, charset and transfer encoding. For more information, see RFC1867: http://www.ietf.org/rfc/rfc1867.txt. Each field may be replaced by a variable. The value may be a string or a file input.
The Filename field describes the file name within the part. The part content data is described by the Source File field. The file may be identified using a set path or one related to the project. The files are automatically copied to all the Load Generators when the test is started.