OAuth Consumer Request(2-legged OAuth)

gistfile1.scala

import java.net.URI
import org.apache.http._
import org.apache.http.client._
import org.apache.http.impl.client._
import org.apache.http.entity.InputStreamEntity
import org.apache.http.client.methods._
import scala.util.parsing.json.JSON._
import java.io.StringBufferInputStream
import org.apache.commons.codec.binary.Base64.encodeBase64
import javax.crypto
import scala.collection.immutable.TreeMap
import scala.collection.mutable.ListBuffer

def sign(method: String, url: String,consumer_key:String,consumer_secret:String,xoauth_requestor_id:String) = {
    val oauth_params = Map(
      "oauth_consumer_key" -> consumer_key,
      "oauth_nonce" -> System.nanoTime.toString,
      "oauth_signature_method" -> "HMAC-SHA1",
      "oauth_timestamp" -> (System.currentTimeMillis / 1000).toString,
      "oauth_version"->"1.0",
      "xoauth_requestor_id" -> xoauth_requestor_id
    )    
    val encoded_ordered_params = (
      new TreeMap[String, String] ++  oauth_params
    ) map { case (k, v) => k + "=" + v } mkString "&"
    
    val message = (method :: java.net.URLEncoder.encode(url,"UTF-8") :: java.net.URLEncoder.encode(encoded_ordered_params,"UTF-8") :: Nil).mkString("&")

    val SHA1 = "HmacSHA1";
    val key_str = consumer_secret + "&"
    val key = new crypto.spec.SecretKeySpec(key_str.getBytes("UTF-8"), SHA1)
    val sig = {
      val mac = crypto.Mac.getInstance(SHA1)
      mac.init(key)
      new String(encodeBase64(mac.doFinal(message.getBytes("UTF-8"))))
    }
    oauth_params + ("oauth_signature" -> sig)
}

val CONSUMER_KEY="????????????????????"
val CONSUMER_SECRET="?????????????????"
val GAME_ID = "??????????????"
val url = "http://???????????????????"
val uri = new URI(url)

val oauth_params = sign("POST", url, CONSUMER_KEY,CONSUMER_SECRET,GAME_ID)

val lis = new ListBuffer[String]
oauth_params.foreach((t) => lis + (t._1 + "=\"" + t._2 + "\""))
val auth = """OAuth realm="",""" + lis.mkString(",")

val httppost = new HttpPost(uri)
val httpclient = new DefaultHttpClient();

val json = "???????????????????????"

val reqEntity = new InputStreamEntity(
                    new StringBufferInputStream(json), json.length);
reqEntity.setContentType("application/json")
httppost.addHeader("Authorization",auth)
httppost.setEntity(reqEntity)
val response = httpclient.execute(httppost)