Operator ReadFile API

[Pascal Gillet]

Hi All,
I try to read the stderr/stdout files from the Mesos sandbox with the READ_FILE 
call in the Operator HTTP API.

I get a well-formatted json response as follows:

{
   'type': 'READ_FILE',
   'read_file': {
      'data': 'SDFtyfytgh4TR67RFY8',
      'size': 19
   }
} 

But I'm just getting a sequence of letters and numbers that has nothing to do 
with the file contents. 

Is the returned data encoded or compressed?

Thanks,
Pascal GILLET