package com.fenghuo.struts.download;

import java.net.URLEncoder;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DownloadAction;

import com.fenghuo.music.util.FileUtils;

public class DownLoad extends DownloadAction {

@Override
protected StreamInfo getStreamInfo(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//獲取資源文件的名稱
String resname = request.getParameter("resname");

//利用struts下載資源
return new DownloadAction.ResourceStreamInfo("audio/x-mpeg", this
.getServlet().getServletContext(), "/resource/music/" + resname);
}

@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//向?yàn)g覽器發(fā)送消息頭，使文件以附件的方式打開，并找到資源名對應(yīng)的文件名稱發(fā)送給瀏覽器
String resname = request.getParameter("resname");

FileUtils fu = new FileUtils(this.getServlet().getServletContext());
Map<String,String> musmap = fu.getMusmap();
String name = musmap.get(resname);

//同時對文件名進(jìn)行編碼。在FireFox下還是有亂碼，不明白原因，望指教。
response.setHeader("content-disposition", "attachment;filename="
+ URLEncoder.encode(name, "UTF-8"));
return super.execute(mapping, form, request, response);
}
}