Exporting report as file to other report

Exporting report as file to other report

Hello Folks,

I have a requirement to download report from Creator using api. But there is no api to download report. Data api have report view functionality but I can not sort data and if some one changes are order in report my functionality will fail. 

My requirement. 

Existing report A 

Export report A as file to report B 

Download file from report B. But I am not able to find a solution for this. :(