问题描述
我在JSP中有一个页面,其中列出了一些用户可以下载的文件。
Thoses文件不在本地服务器上,它们位于远程文件服务器上。
I have a page in JSP that list some file that could be downloaded by a user.Thoses files are not on the local server, they are on a remote file server.
当用户单击下载文件时,Web服务器通过TCP连接到文件服务器。 Web服务器下载文件并为客户端创建HTTP响应。
When the user click to download a file, the webserver connect via TCP to the file server. The web server download the file and create a HTTP response for the client.
这是我的代码:
<%@page language="java"%>
<%@page import="sun.misc.Request"%>
<%@page import="listing.ClientTCPStockage"%>
<%@page import="java.net.InetAddress"%>
<%
out.clearBuffer();
String nomFichier = request.getParameter("fichier");
String adresseStockage = request.getParameter("adresseStockage");
ClientTCPStockage clientStockage = new ClientTCPStockage(InetAddress.getByName(adresseStockage), 2004);
byte donneeFichier[] = clientStockage.getDonneesFichier(nomFichier);
response.setHeader("Content-Disposition", "attachment;filename=\"" + nomFichier + "\"");
response.setHeader("Content-Type", "application/octet-stream;");
response.setHeader("Accept-Ranges", "bytes");
response.setHeader("Content-Length", String.valueOf(donneeFichier.length));
for(int i = 0; i < donneeFichier.length; i++){
out.write(donneeFichier[i]);
}
%>
对于基于文本的文件,如.csv或正常的.txt
但它不适用于其他类型,如.mp3或.jpeg ..文件最终损坏。
This is working perfectly fine for text-based file, like .csv or normal .txtbut It doesnt work for other type like .mp3 or .jpeg.. the files end up corrupt.
我认为我的编码有问题,但我可以' t找到哪里..
I think there is a problem with my encoding but I can't find where..
这是HTTP头响应:
HTTP/1.x 200 OK
Server: Apache-Coyote/1.1
Content-Disposition: attachment;filename="test.mp3"
Accept-Ranges: bytes
Content-Type: application/octet-stream;
Content-Length: 5387668
Date: Sun, 20 Dec 2009 18:52:18 GMT
谢谢。
推荐答案
如果强制使用jsp(而不是servlet),可以看一下
If forced to use jsp (and not a servlet), you may take a look at this how-to
它使用 ServletOutputStream
,它更适合二进制内容,而不是一个 JspWriter
。
It uses the ServletOutputStream
, which is more appropriate for binary content, rather than a JspWriter
.
另请注意修剪空白的设置。
Also note the settings for trimming the whitespaces.
这篇关于JSP下载 - 应用程序/八位字节流的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!