fix compile errors

src/main/java/sensor2graph/Sensor.java

@@ -5,15 +5,10 @@ import sensor2graph.georev.*;
 import org.neo4j.driver.*;
 import org.neo4j.driver.Record;
 
-import okhttp3.MediaType;
+import okhttp3.*;
 
 import com.google.gson.*;
 
-import java.net.*;
-import java.net.http.*;
-import java.net.http.HttpRequest.BodyPublishers;
-import java.net.http.HttpResponse.BodyHandlers;
-import java.time.Duration;
 import java.util.*;
 import java.util.function.*;
 import java.util.logging.*;
@@ -74,7 +69,7 @@ class Sensor {
 
 		Request request = new Request.Builder()
 			.url(Main.pid_registry_uri + target_uri)
-			.method(RequestBody.create(MediaType.parse("application/json", body.toString())))
+			.method(method, RequestBody.create(MediaType.parse("application/json"), body.toString()))
 			.header("Accept", "application/json")
 			.header("Content-Type", "application/json")
 			.header("Authorization", "Handle clientCert=\"true\"")
@@ -84,14 +79,13 @@ class Sensor {
 			System.out.println(response.body().string() + response.code());
 			Main.glogger.fine("status: " + response.code());
 			Main.glogger.fine("resp: " + response.body().string());
-		}
-
 
-		if (response.code() / 100 != 2) {
-			throw new Exception("request to pid registry failed with status code " + response.statusCode() + ", reponse: " + response.body());
+			if (response.code() / 100 != 2) {
+				throw new Exception("request to pid registry failed with status code " + response.code() + ", reponse: " + response.body().string());
+			}
+	
+			return response.body().string();
 		}
-
-		return response.body();
 	}
 
 	private void add_attribute(JsonArray body, String registered_type, String parsed_data) {