How to return an InputStream as a file in Spring Boot?

Question

I have an InputStream to a file obtained from a server through SSH using JSch. I want to return it as a file in my Spring Boot application.

Try using ResponseEntity as I read on many forums but it doesn't work

Answer 1

You could use the HttpServletResponse like this:

 public static void sendFileInResponse (HttpServletResponse response, InputStream inputStream) throws IOException {
    response.setContentType("your_content_type");
    response.setHeader("Content-Disposition", "inline;filename=your_file_name");
    OutputStream outputStream = response.getOutputStream();
    byte[] buff = new byte[2048];
    int length = 0;
    while ((length = inputStream.read(buff)) > 0) {
        outputStream.write(buff, 0, length);
        outputStream.flush();
    }
    outputStream.close();
    inputStream.close();
    response.setHeader("Cache-Control", "private");
    response.setDateHeader("Expires", 0);
}