Thanks for responding Aris,
I have implemented what you suggested and am still getting the same problem
(note I am using MyFaces 1.0.7). Have I implemented it below the way you
have it? I put an actionListener on my commandLink and use an ActionEvent
method to capture the line of the dataTable that they selected. I then call
writeFileToBrowser and at the end specify
FacesContext.getCurrentInstance().responseComplete().
Do you see where I may have something wrong?
<h:commandLink
actionListener="#{DocumentCtl.downloadPDF}"
immediate="true">
<h:outputText value="view" styleClass="copy"/>
</h:commandLink>
public void downloadPDF(ActionEvent event) {
Document doc = (Document) UIHelper.getReqMapObj("document");
String file = Sysctl.getRecord().getLowresfolder() + doc.getGuid() +
".pdf";
writeFileToBrowser(file, doc.getName() + ".pdf",
doc.getUploadtype());
}
private void writeFileToBrowser(String fileSource, String downloadName,
String contentType) {
if (!FacesContext.getCurrentInstance().getResponseComplete()
&& FileControl.exists(fileSource)) {
HttpServletResponse response = (HttpServletResponse)
FacesContext.getCurrentInstance()
.getExternalContext().getResponse();
response.setContentType(contentType);
response.setHeader("Content-Disposition",
"attachment;filename=\"" + downloadName
+ "\"");
try {
ServletOutputStream out = response.getOutputStream();
BufferedInputStream bufferedinputstream = new
BufferedInputStream(
new FileInputStream(fileSource));
byte abyte0[] = new byte[4096];
int i;
while ((i = bufferedinputstream.read(abyte0, 0, 4096)) !=
-1)
out.write(abyte0, 0, i);
out.flush();
out.close();
FacesContext.getCurrentInstance().responseComplete();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
-----Original Message-----
From: Aris Bartee [mailto:[EMAIL PROTECTED]
Sent: Saturday, April 23, 2005 9:05 AM
To: MyFaces Discussion
Subject: Re: Download file from browser problem - two clicks
I wrapped my download code in an event method:
foo(ActionEvent event). The immediate attribute for
the uicommand tag should be true.
--- Aaron Bartell <[EMAIL PROTECTED]> wrote:
> Below is the problem I am still having that I am
> wondering if anyone has
> found a solution to. Is there a way to make it so
> the user doesn't have to
> click on the same link twice after a file download
> has occurred? Almost
> seems like something in the JSF lifecycle isn't
> completing correctly. I am
> returning null from action method of the link
> clicked so I stay on the same
> page. Any thoughts?
>
>
>
> Thanks,
>
> Aaron Bartell
>
>
>
>
>
>
>
>
>
>
>
> Here is how I have done it based on things I have
> found on the net. The nice
> thing about streaming it to the browser is that the
> file need not exist in
> your context, it can be anywhere on the file system.
> The only bummer is that
> this seems to create a problem after the user
> downloads. Any button or link
> that they click after I do the .responseComplete()
> it doesn't work the first
> time. But the second time they click the button or
> link it executes the
> appropriate code. I am open to suggestions on any
> errors in my code to fix
> that problem...
>
>
>
>
> private void writeFileToBrowser(String fileSource,
> String downloadName,
> String contentType) {
>
> if
>
(!FacesContext.getCurrentInstance().getResponseComplete()
> &&
> FileControl.exists(fileSource)) {
>
> HttpServletResponse response = (HttpServletResponse)
> FacesContext.getCurrentInstance()
> .getExternalContext().getResponse();
> response.setContentType(contentType);
> response.setHeader("Content-Disposition",
> "attachment;filename=\"" +
> downloadName + "\"");
>
> try {
> ServletOutputStream out =
> response.getOutputStream();
> BufferedInputStream bufferedinputstream = new
> BufferedInputStream(new
> FileInputStream(
> fileSource));
>
> byte abyte0[] = new byte[4096];
> int i;
> while ((i = bufferedinputstream.read(abyte0, 0,
> 4096)) != -1)
> out.write(abyte0, 0, i);
>
> out.flush();
> out.close();
>
>
>
>
>
FacesContext.getCurrentInstance().responseComplete();
> } catch (IOException ex) {
> ex.printStackTrace();
> }
> }
> }
>
>
>
> public static boolean exists(String fileSource) {
> File f = new File(fileSource);
> return f.exists();
> }
>
>
>
> HTH,
> Aaron Bartell
>
>
>
>
>
>
> Patrick B Haggood wrote:
>
>
>
> Anyone have an example of downloading using MyFaces?
> I see on the
> sample you can use outputtext components, but that's
> using the real
> filename (which I keep in a datastore to guard
> against duplicate
> filenames; the system assigns new filename,
> FILE0002, FILE0003, etc
> apon upload)
>
>
>
> Thanks!
>
>
>
>
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