content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * 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.
   */
  
  package com.android.ahat;
  
  import com.android.tools.perflib.heap.Instance;
  import com.sun.net.httpserver.HttpExchange;
  import com.sun.net.httpserver.HttpHandler;
  import java.awt.image.BufferedImage;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.PrintStream;
  import javax.imageio.ImageIO;
  
  class BitmapHandler implements HttpHandler {
    private AhatSnapshot mSnapshot;
  
    public BitmapHandler(AhatSnapshot snapshot) {
      mSnapshot = snapshot;
    }
  
    @Override
    public void handle(HttpExchange exchange) throws IOException {
      try {
        Query query = new Query(exchange.getRequestURI());
        long id = query.getLong("id", 0);
        BufferedImage bitmap = null;
        Instance inst = mSnapshot.findInstance(id);
        if (inst != null) {
          bitmap = InstanceUtils.asBitmap(inst);
        }
  
        if (bitmap != null) {
          exchange.getResponseHeaders().add("Content-Type", "image/png");
          exchange.sendResponseHeaders(200, 0);
          OutputStream os = exchange.getResponseBody();
          ImageIO.write(bitmap, "png", os);
          os.close();
        } else {
          exchange.getResponseHeaders().add("Content-Type", "text/html");
          exchange.sendResponseHeaders(404, 0);
          PrintStream ps = new PrintStream(exchange.getResponseBody());
          HtmlDoc doc = new HtmlDoc(ps, DocString.text("ahat"), DocString.uri("style.css"));
          doc.big(DocString.text("No bitmap found for the given request."));
          doc.close();
        }
      } catch (RuntimeException e) {
        // Print runtime exceptions to standard error for debugging purposes,
        // because otherwise they are swallowed and not reported.
        System.err.println("Exception when handling " + exchange.getRequestURI() + ": ");
        e.printStackTrace();
        throw e;
      }
    }
  }
  