[#3289] - Http API should have parameters to specify margin

I am a Asp.Net programmer. I have migrated to Jasper reports from Crystal reports due to a great functionality of jasper. I have though successfully integrated jasper report to my system using a HTTP API. So, in my case, i am opening my reports in an Asp.Net based application using HTTP API. So, now i want to specify report margin using this HTTP API. I have some clients, who use preprinted stationary. So, for me page margins would be varied client by client. So, i cant put it static.