Question

我正在使用itext创建可编辑的pdf并下载它。使用mvn appengine:run在本地运行时，pdf下载时本地没有任何问题。部署到Google App Engine后，当我尝试下载其抛出

时

Internal Server 500 Error

Whitelabel Error Page

This application has no explicit mapping /error, so you are seeing this as a fallback.

Sat Nov 11 17:41:57 UTC 2017
There was an unexpected error (type=Internal Server Error, status=500).
/base/data/home/Downloads/file.pdf (No such file or directory)"

以下是供下载的代码，

 String home = System.getProperty("user.home");
 File file = new File(home+"/Downloads/"+fileName);
 // creating pdf code
 response.setContentType("application/pdf");
 response.setHeader("Content-disposition", "attachment;filename="+fileName);

 FileInputStream fis = null;
 DataOutputStream os = null;

 try
 {
   response.setHeader("Content-Length", String.valueOf(file.length()));
   fis = new FileInputStream(file);
   os = new DataOutputStream(response.getOutputStream());
   byte[] buffer = new byte[1024];
   int len = 0;
  while((len = fis.read(buffer)) >= 0)
   {
    os.write(buffer,0,len);
   }
 }
 catch(Exception e)
 {
  e.printStackTrace();
 }
 finally
 {
  fis.close();
  os.flush();
  os.close();
 }

谢谢！

本地下载托管在Google App引擎中的pdf文件

0 个答案: