/** * Tencent is pleased to support the open source community by making MSEC available. * * Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved. * * Licensed under the GNU General Public 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 * * https://opensource.org/licenses/GPL-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 beans.service; import beans.request.MonitorRequest; import ngse.org.JsonRPCHandler; import ngse.org.JsonRPCResponseBase; import javax.servlet.ServletOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.PrintWriter; /** * Created by Administrator on 2016/2/24. */ public class DownloadMonitorChart extends JsonRPCHandler { public JsonRPCResponseBase exec(MonitorRequest request) { String filename = MonitorBySvcOrIP.getChartDirector()+ File.separator+request.getChart_to_download(); try { File file = new File(filename); FileInputStream in = new FileInputStream(file); // set the MIME type. getHttpResponse().setContentType("image/png"); getHttpResponse().setHeader("Content_Length", String.format("%d", file.length())); getHttpResponse().setHeader("Content-Disposition", "inline; filename=\"chart.png\""); ServletOutputStream out = getHttpResponse().getOutputStream(); byte[] buf = new byte[10240]; while (true) { int len = in.read(buf); if (len <= 0) { break; } out.write(buf, 0, len); } out.close(); in.close(); //下载完就清理掉吧 file.delete(); } catch (Exception e) { e.printStackTrace(); return null; } return null; } }