Simple sample with simple api to request a report

Hello,

i running Jasper Server and i can see the report by using the admin interface.

Now i want request reports from outside of that area, i have tried this api:

and it works fine but is too simple i can´t change the conection database and other things, i have seen other apis but many of them fail to work.

Please any one can tell me a simple api that i don´t need to change too much things on the server and can run the reports and export to: pdf, xls,docx,

also i need to change the connection string for use other mysql source and refresh the server when i change something in the report the server don´t see that changes,

i need api that does that.

Thanks a lot for your help

Bruno