Using ethernet deserialize json

hai , need to get json from my server using http throug ethernet

https://www.arduino.cc/en/Tutorial/LibraryExamples/WebClient

 // Make a HTTP request:
    client.println("GET /");
    client.println("Host: 54.202.0.170");
    client.println("Connection: close");
    client.println();

if i use this i can only able to read the json. can't deserialize it.

any sugestion for geting data through ethernet like http.get()

have a look at https://arduinojson.org

You forgot to put the protocol version in the GET header:
client.println("GET / HTTP/1.1");

Don't forget to read the headers before trying to parse the JSON document in the HTML body.