content: package act.handler.builtin;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * #L%
   */
  
  import act.app.ActionContext;
  import act.handler.ExpressHandler;
  import act.handler.builtin.controller.FastRequestHandler;
  import act.util.ByteBuffers;
  import org.osgl.http.H;
  import org.osgl.util.S;
  
  import java.nio.ByteBuffer;
  
  public class Echo extends FastRequestHandler implements ExpressHandler {
  
      private ByteBuffer buffer;
      private String toString;
      private String contentType;
  
      public Echo(String msg) {
          this(msg, H.Format.TXT.contentType());
      }
  
      public Echo(String msg, String contentType) {
          this.buffer = ByteBuffers.wrap(msg);
          this.contentType = S.blank(contentType) ? H.Format.TXT.contentType() : contentType;
          this.toString = "echo: " + msg;
      }
  
      @Override
      public void handle(ActionContext context) {
          H.Response resp = context.resp();
          resp.contentType(contentType);
          resp.writeContent(buffer.duplicate());
      }
  
      @Override
      public String toString() {
          return toString;
      }
  
  }
  