Data is trim in POST method

Working on version 1.4.9

Here is my data

wdata: Nzg0MDYwYzdkYzQ5MzUyNzAyNzE0N2IzNjFlZjQzMmY3MTgwZjcyZTI2ODFjM2VhODIzZWY3ZGRjZjE4ZGRlNjI4ZTYzMTlkMDRiM2YyMTFlYTljNThhMzRjMjYzZmEyOGZkYWFkNWMwMjdmODE2ZDcyM2Y1MzdiYmQyMGJjNGIyNmM5ZmFjMDUwNWIyYTU0OTE5NjhkMzBkM2U1NWE3Yg==
stokenv: demo_token
sstokenv: demo_token

When I make a GET and results ( is OK):
{"stokenv":"demo_token","sstokenv":"demo_token","wdata":"Nzg0MDYwYzdkYzQ5MzUyNzAyNzE0N2IzNjFlZjQzMmY3MTgwZjcyZTI2ODFjM2VhODIzZWY3ZGRjZjE4ZGRlNjI4ZTYzMTlkMDRiM2YyMTFlYTljNThhMzRjMjYzZmEyOGZkYWFkNWMwMjdmODE2ZDcyM2Y1MzdiYmQyMGJjNGIyNmM5ZmFjMDUwNWIyYTU0OTE5NjhkMzBkM2U1NWE3Yg=="}

And I make a POST and results (PROBLEMS here):
{"stokenv":"demo_token","wdata":"Nzg0MDYwYzdkYzQ5MzUyNzAyNzE0N2IzNjFlZjQzMmY3MTgwZjcyZTI2ODFjM2VhODIzZWY3ZGRj\nZjE4ZGRlNjI4ZTYzMTlkMDRiM2YyMTFlYTljNThhMzRjMjYzZmEyOGZkYWFkNWMwMjdmODE2ZDcy\nM2Y1MzdiYmQyMGJjNGIyNmM5ZmFjMDUwNWIyYTU0OTE5Nj","Accept-Encoding:_gzip\r\n\r\nsstokenv":"demo_token"}

Note: wdata is trim, sstokenv and Accept-Encoding are merge to one so PHP code can not detect
sstokenv key in request