remove references to String http responses.

rpc/src/main/java/software/sava/rpc/json/http/client/JsonHttpClient.java

@@ -8,6 +8,7 @@
 import java.net.http.HttpResponse;
 import java.time.Duration;
 import java.util.concurrent.CompletableFuture;
+import java.util.function.BiFunction;
 import java.util.function.Function;
 import java.util.function.Predicate;
 
@@ -49,6 +50,10 @@ protected static <R> Function<HttpResponse<byte[]>, R> applyResponse(final Funct
     return new JsonResponseController<>(adapter);
   }
 
+  protected static <R> Function<HttpResponse<byte[]>, R> applyResponse(final BiFunction<byte[], JsonIterator, R> adapter) {
+    return new KeepJsonResponseController<>(adapter);
+  }
+
   protected <R> Function<HttpResponse<byte[]>, R> wrapParser(final Function<HttpResponse<byte[]>, R> parser) {
     return applyResponse == null ? parser : response -> applyResponse.test(response) ? parser.apply(response) : null;
   }

rpc/src/main/java/software/sava/rpc/json/http/client/JsonResponseController.java

@@ -17,10 +17,6 @@ static void logBody(final HttpResponse<byte[]> httpResponse, final RuntimeExcept
     logBody(httpResponse, new String(httpResponse.body()), ex);
   }
 
-  static void logStringBody(final HttpResponse<String> httpResponse, final RuntimeException ex) {
-    logBody(httpResponse, httpResponse.body(), ex);
-  }
-
   static void logBody(final HttpResponse<?> httpResponse, final String body, final RuntimeException ex) {
     log.log(ERROR,
         String.format("Failed to parse [httpCode:%d], [body=%s]", httpResponse.statusCode(), body),
@@ -32,13 +28,6 @@ static RuntimeException throwUncheckedIOException(final HttpResponse<?> httpResp
         "HTTP request failed with [httpCode:%d], [body=%s]", httpResponse.statusCode(), body)));
   }
 
-  public static void checkStringResponseCode(final HttpResponse<String> httpResponse) {
-    final int responseCode = httpResponse.statusCode();
-    if (responseCode < 200 || responseCode >= 300) {
-      throw throwUncheckedIOException(httpResponse, httpResponse.body());
-    }
-  }
-
   public static void checkResponseCode(final HttpResponse<byte[]> httpResponse) {
     final int responseCode = httpResponse.statusCode();
     if (responseCode < 200 || responseCode >= 300) {