一段Server Push的调试

最新推荐文章于 2024-09-10 22:05:34 发布

原创最新推荐文章于 2024-09-10 22:05:34 发布 · 1.4k 阅读

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#server #exception #byte #file #service #string

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本文介绍了ServerPush技术的具体实现方法，通过Java代码示例展示了如何利用Servlet进行多媒体内容推送，包括图片和HTML脚本的实时更新。

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现在能搜索到的99年最早的在国内介绍Server Push的文章就是自己那篇"Server Push具体实现",今天调试竟然花了很长时间

才正常工作。放在这里做记录吧：

package test;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

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

public class Test extends HttpServlet{
public void service(HttpServletRequest request,HttpServletResponse response)
  throws IOException
{
  ServletOutputStream out = response.getOutputStream();
  String strBoundary = "myRandomString";
  response.setContentType("multipart/x-mixed-replace;boundary=" + strBoundary);

  out.print("--"+strBoundary+"/r/n");
  out.print("Content-type: image/jpeg/r/n/r/n");
  File f = new File("d:/96.jpg");
  byte[] buf = new byte[(int)f.length()];
  FileInputStream in = new FileInputStream(f);
  in.read(buf);
  in.close();
  out.write(buf);
  out.flush();

   try{
    Thread.sleep(2000);
   }catch(Exception e){}
  for(int i = 0; i < 10; i++){
   out.print("--"+strBoundary+"/r/n");
   out.print("Content-type: text/html/r/n/r/n");
   out.print("<script>alert(1)</script>/r/n/r/n");
   out.flush();
   try{
    Thread.sleep(1000);
   }catch(Exception e){}
  }
  out.print("--"+strBoundary+"--/r/n");
}
}