Hi i have to send a get request to an url
http://onemoredemo.appspot.com/group?authToken=access_token&authMethod=oauth
with request body contains json object
Don't do it.
Read this: http://tech.groups.yahoo.com/group/rest-discuss/message/9962
"Yes. In other words, any HTTP request message is allowed to contain a message body, and thus must parse messages with that in mind. Server semantics for GET, however, are restricted such that a body, if any, has no semantic meaning to the request. The requirements on parsing are separate from the requirements on method semantics.
So, yes, you can send a body with GET, and no, it is never useful to do so.
This is part of the layered design of HTTP/1.1 that will become clear again once the spec is partitioned (work in progress)."
For other interesting discussions on this check this:
https://stackoverflow.com/a/978094/550967
https://stackoverflow.com/a/978173/550967
https://stackoverflow.com/a/978519/550967
The body of a GET request is not read.
Have you tried adding it to the params:
http://onemoredemo.appspot.com/group?authToken=access_token&authMethod=oauth&goupid=some_variable