Download file problems

Question

Hi all,
I write a jsp page for downloading file (any file type) with "Open" and "Save" button. Save all OK, but some file I can Open
Here my jsp code :
BufferedOutputStream output = null;
try {
response.setContentType("application/octet-stream");
response.setHeader("Location", fileName);
response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
int length = (int) file.length();
if (length > 0) {
response.setContentLength(length);
output = new BufferedOutputStream(response.getOutputStream(), 1024 /* buffer size */);
response.setBufferSize(1024);
//when we start download, we cannot redirect or raise exceptions
FileUtil.popFile(file, output);
output.flush();
} catch (FileNotFoundException e) {
log.error("Can't find the such log file on server " + fileName);
} catch (IOException e) {
log.error("Error while trying to send backup file from server (" + fileName + ").", e);
} finally {
if (output != null) {
try {
output.close();
} catch (IOException e) { }
public static void popFile(File srcFile, OutputStream output) throws IOException {
BufferedInputStream input = null;
byte[] block = new byte[1024];
try {
input = new BufferedInputStream(new FileInputStream(srcFile), 1024);
while (true) {
int length = input.read(block);
if (length == -1) break;// end of file
output.write(block, 0, length);
} finally {
if (input != null) {
try {
input.close();
} catch (IOException ex) {
// just ignore
* How can I limit file size when uploading. I use Struts framework

Answer 1

Hi all,
I write a jsp page for downloading file (any file type) with "Open" and "Save" button. Save all OK, but some file I can Open
Here my jsp code :
BufferedOutputStream output = null;
try {
response.setContentType("application/octet-stream");
response.setHeader("Location", fileName);
response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
int length = (int) file.length();
if (length > 0) {
response.setContentLength(length);
output = new BufferedOutputStream(response.getOutputStream(), 1024 /* buffer size */);
response.setBufferSize(1024);
//when we start download, we cannot redirect or raise exceptions
FileUtil.popFile(file, output);
output.flush();
} catch (FileNotFoundException e) {
log.error("Can't find the such log file on server " + fileName);
} catch (IOException e) {
log.error("Error while trying to send backup file from server (" + fileName + ").", e);
} finally {
if (output != null) {
try {
output.close();
} catch (IOException e) { }
public static void popFile(File srcFile, OutputStream output) throws IOException {
BufferedInputStream input = null;
byte[] block = new byte[1024];
try {
input = new BufferedInputStream(new FileInputStream(srcFile), 1024);
while (true) {
int length = input.read(block);
if (length == -1) break;// end of file
output.write(block, 0, length);
} finally {
if (input != null) {
try {
input.close();
} catch (IOException ex) {
// just ignore
* How can I limit file size when uploading. I use Struts framework