[xwiki-devs] insert a link to a dynamic image

Hello, i have a groovy script that generates an xwiki table from an LDAP nodes listing. In the node is a picture (jpeg as a byte[]), and i wonder how i can display this byte[] as a picture. I tried to understand how charting plugin does this job (have template generate a picture that is later queried by browser) but i didn't understand the principle. Can someone explain me how to do this? David Delbecq