[Feature Request]: add possibility to set arbitrary HTTP headers for the response of web services

[gmitter-ef]

What would you like to happen?

The "Web Service" metadata object only allows to configure the "Content type" header of the HTTP response (however, suffering from https://github.com/apache/hop/issues/5425), but has no other options.

In order to enable to set the filename of the downloaded files, we would need to option to set "Content-Disposition" header, see also https://stackoverflow.com/a/9195376.

Even better would be the possibility to set arbitrary HTTP headers, similarly to how it can be done for the HTTP requests in the "Headers" tab of the "REST client" transform.

Issue Priority

Priority: 3

Issue Component

Component: Hop Server, Component: Metadata