JSF PDF not downloadable while returned from Servlet [duplicate] - pdf

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Internet Explorer 9 does not use file name for inline attachments
(1 answer)
Closed 3 years ago.
I have a form that once completed opens a new tab and calls my bean method annonceReturn().
This method sends back a pdf file. The problem is that as I open a new tab with _blank, the URL ends with .xhtml. Even the filename is displayed as being in my exemple "list.xhtml" (the last part of the URL). The problem is that I can't download this file because it's not considerated as a pdf file.
This is my xhtml file :
<h:form id="form">
<p:commandButton id="envoiRetour" onclick="this.form.target = '_blank';"
actionListener="#{returnCtrl.announceReturn()}"
value="Open PDF in new tab"
ajax="false" />
</h:form>
This is the returnCtrl.annonceReturn() method :
public void announceReturn() throws MalformedURLException, FileNotFoundException, DocumentException, BadElementException, IOException, InterruptedException {
String referenceAnnouncement = "C:/Users/path_to_my_pdf_file.pdf";
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
HttpServletResponse response = (HttpServletResponse) externalContext.getResponse();
BufferedInputStream input = null;
BufferedOutputStream output = null;
try {
input = new BufferedInputStream(new FileInputStream(referenceAnnouncement), 10240);
response.reset();
response.setHeader("Content-type", "application/pdf");
response.setContentLength((int)new File(referenceAnnouncement).length());
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
response.setHeader("Content-disposition", "inline; filename=" + "file.pdf");
response.setHeader("pragma", "public");
output = new BufferedOutputStream(response.getOutputStream(), 10240);
byte[] buffer = new byte[10240];
int length;
while ((length = input.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
output.flush();
} finally {
output.close();
input.close();
}
}
How can I do to open this PDF in a new tab and be able to download it ?
When I try to download it, it says there is a network error (and it tries to save it as xhtml file).
EDIT : this is the question that helped me : How to open a PDF file in a new tab
EDIT 2 : the problem is not that the PDF doesn't show. The problem is that it shows in the new tab but when I try to download it, the explorer wants to save it as an XHTML file.
EDIT 3 : as mentionned here -> Open PDF in new tab, saving file gives wrong file name
it seems the filename is ignored if the disposition is not "attachment"... So I think I need to think about another way to do it.
Thanks for your time.

Answer 1

Try 'attachment' instead of 'inline' to force the browser saving the file (instead of trying to open with the associated plugin - if installed)
response.setHeader("Content-disposition", "attachment; filename=" + "file.pdf");
Hope it helps.
Beppe

Answer 2

Here is my code, hope it helps.
FacesContext fc = FacesContext.getCurrentInstance();
ExternalContext ec = fc.getExternalContext();
File temp = File("./path/abc.pdf");
temp.deleteOnExit();
ec.responseReset();
ec.setResponseContentType("application/pdf");
ec.setResponseContentLength((int)temp.length());
ec.setResponseHeader("Content-Disposition", "attachment; filename=\"" + temp.getName() + "\""); //inline;
OutputStream output = ec.getResponseOutputStream();
Files.copy(temp.toPath(), output);
fc.responseComplete();

Answer 3

I have tested in my project, here is the solution:
1 - Create button
<h:commandButton
onclick="this.form.target='_blank'"
id="cmdOpenPDF"
action="#{bean.openPDF(bean.code)}"
value="New PDF">
</h:commandButton>
2 - The bean has a function with a redirect link to PDF. This sample the pdf in the root folder.
public void openPDF(String code) throws Exception {
String filePdfName ="";
try {
//Make sure that this file in root
File pdf = new File("sample.pdf");
filePdfName = pdf.getName();
} catch (Exception ex) {
ex.printStackTrace();
}
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
ec.redirect(ec.getRequestContextPath() + "/" + filePdfName);
}