On Wednesday, October 20, 2010 5:49:12 AM UTC+2, mike b wrote:
>
> I have read all the other posts about downloading Excel files and how
> to do it w/ an IFRAME, with RequestBuilder, and Window.open().
> However, none of them actually work. Luckily, I have a working
> servlet which executes and returns successfully with javascript.
> However, we'd like to do it all in GWT. The error message from IE is
> below. The Window.open() DOES work with FF, but not with IE.
> Unfortunately, we must deploy to IE, no options there.
>
> Situation:
> GWT 2.0.4 mvp4g 1.2.0
> Need to download a file to open in Excel. At this point, its actually
> a text file, but the MIME type is setup for Excel.
>
> The servlet has been tested w/ straight java script using
> "document.body.appendChild(iframe);". This works like a champ in IE
> and FF.
>
> However, when I do "Window.open(url, "_self",null);" in GWT, IE can't
> download the file. It throws an error saying...
>
> "
> Internet Exploroer cannot download MyFile from localhost
>
> IE was not able to open this Internet site. The requests site is
> either unavailable or cannot be found. Please try again later.
> "
>
> In GWT, I have also tried just using a Frame, adding it to a Panel,
> and then calling myFrame.setUrl("myUrl");
>
> This also successfully gets to the servlet, but fails w/ the above
> error message while trying to "open" the file.
>
> It seems as if GWT is telling the browser to cancel the download when
> it pops up.
>
> Any suggestions? Any guesses?
>
> Thanks,
> mikeb
Hi, I am following the steps described by Jim Douglas. I want to read Zip
file at server side and allow client to download at button click event.
*SERVER SIDE Code*:
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException,
IOException {
super.doGet(request, response);
// load settings
dbSettings();
String filename = request.getParameter("filename");
if (filename == null) {
response.sendError(SC_BAD_REQUEST, "Missing file Name");
return;
}
// Load zip file with filename from Backup Directory
File zipFile = new File(fileBackupPath + File.separator + filename
+ ".zip");
File file = new File(zipFile.toString());
long length = file.length();
FileInputStream fis = new FileInputStream(file);
response.addHeader("Content-Disposition","attachment; filename=\""
+ filename + "\"");
response.setContentType("application/zip");
if (length > 0 && length <= Integer.MAX_VALUE);
response.setContentLength((int)length);
ServletOutputStream out = response.getOutputStream();
response.setBufferSize(32768);
int bufSize = response.getBufferSize();
byte[] buffer = new byte[bufSize];
BufferedInputStream bis = new BufferedInputStream(fis,bufSize);
int bytes;
while ((bytes = bis.read(buffer, 0, bufSize)) >= 0)
out.write(buffer, 0, bytes);
bis.close();
fis.close();
out.flush();
out.close();
*CLIENT SIDE:*
String url = GWT.getModuleBaseURL() + "FileUploadDownloadServlet?filename="
+ filename;
Window.open(url, "_blank", "status=0,toolbar=0,menubar=0,location=0");
*I get this ERROR: *
HTTP Status 500 - Cannot change buffer size after data has been written
Please guide and help me out. Thanks in anticipation
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