feed: use caching okhttp client

http-api/src/main/java/net/runelite/http/api/feed/FeedClient.java

@@ -28,8 +28,10 @@ import com.google.gson.JsonParseException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import javax.inject.Inject;
 import net.runelite.http.api.RuneLiteAPI;
 import okhttp3.HttpUrl;
+import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
 import org.slf4j.Logger;
@@ -39,6 +41,14 @@ public class FeedClient
 {
 	private static final Logger logger = LoggerFactory.getLogger(FeedClient.class);
 
+	private final OkHttpClient client;
+
+	@Inject
+	public FeedClient(OkHttpClient client)
+	{
+		this.client = client;
+	}
+
 	public FeedResult lookupFeed() throws IOException
 	{
 		HttpUrl url = RuneLiteAPI.getApiBase().newBuilder()
@@ -51,7 +61,7 @@ public class FeedClient
 			.url(url)
 			.build();
 
-		try (Response response = RuneLiteAPI.CLIENT.newCall(request).execute())
+		try (Response response = client.newCall(request).execute())
 		{
 			if (!response.isSuccessful())
 			{

runelite-client/src/main/java/net/runelite/client/plugins/feed/FeedPlugin.java

@@ -64,10 +64,12 @@ public class FeedPlugin extends Plugin
 	@Inject
 	private ScheduledExecutorService executorService;
 
+	@Inject
+	private FeedClient feedClient;
+
 	private FeedPanel feedPanel;
 	private NavigationButton navButton;
 
-	private FeedClient feedClient = new FeedClient();
 	private Supplier<FeedResult> feedSupplier = Suppliers.memoizeWithExpiration(() ->
 	{
 		try