1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ahat; 18 19 import com.android.ahat.heapdump.AhatInstance; 20 import com.android.ahat.heapdump.AhatSnapshot; 21 import com.sun.net.httpserver.HttpExchange; 22 import com.sun.net.httpserver.HttpHandler; 23 import java.awt.image.BufferedImage; 24 import java.io.IOException; 25 import java.io.OutputStream; 26 import java.io.PrintStream; 27 import javax.imageio.ImageIO; 28 29 class BitmapHandler implements HttpHandler { 30 private AhatSnapshot mSnapshot; 31 32 public BitmapHandler(AhatSnapshot snapshot) { 33 mSnapshot = snapshot; 34 } 35 36 @Override 37 public void handle(HttpExchange exchange) throws IOException { 38 try { 39 Query query = new Query(exchange.getRequestURI()); 40 long id = query.getLong("id", 0); 41 BufferedImage bitmap = null; 42 AhatInstance inst = mSnapshot.findInstance(id); 43 if (inst != null) { 44 bitmap = inst.asBitmap(); 45 } 46 47 if (bitmap != null) { 48 exchange.getResponseHeaders().add("Content-Type", "image/png"); 49 exchange.sendResponseHeaders(200, 0); 50 OutputStream os = exchange.getResponseBody(); 51 ImageIO.write(bitmap, "png", os); 52 os.close(); 53 } else { 54 exchange.getResponseHeaders().add("Content-Type", "text/html"); 55 exchange.sendResponseHeaders(404, 0); 56 PrintStream ps = new PrintStream(exchange.getResponseBody()); 57 HtmlDoc doc = new HtmlDoc(ps, DocString.text("ahat"), DocString.uri("style.css")); 58 doc.big(DocString.text("No bitmap found for the given request.")); 59 doc.close(); 60 } 61 } catch (RuntimeException e) { 62 // Print runtime exceptions to standard error for debugging purposes, 63 // because otherwise they are swallowed and not reported. 64 System.err.println("Exception when handling " + exchange.getRequestURI() + ": "); 65 e.printStackTrace(); 66 throw e; 67 } 68 } 69 } 70
