Hi,
I think I've reduced the problem... Can I have a page containing a zone that
displays the contents of a pdf file?
tml:
<body>
<t:Zone t:id="inline" id="inline">
</t:Zone>
<t:EventLink t:event="showDoc" t:zone="inline">
Show Doc
</t:EventLink>
</body>
Java:
Object onShowDoc() {
// Some Object containing a member describing a path to a PDF document
SomeObject someObject = someDAO.find(1L);
String documentPath = someObject.getDocumentUrl();
Path somePath = Paths.get(documentPath);
// the PDF document
File someFile = somePath.toFile();
return new InlineViewingStreamResponse(someFile);
}
Do I have to use an iframe for displaying a pdf? Does this work with zones?
Does the zone need some other return value?
Once this is clear to me, the rest will fall into place, it seems.
Regards,
Daniel P.
-----Ursprüngliche Nachricht-----
Von: Poggenpohl, Daniel [mailto:daniel.poggenp...@isst.fraunhofer.de]
Gesendet: Donnerstag, 19. Februar 2015 16:11
An: Tapestry users
Betreff: AW: PDF Viewer component
Hi,
I've found out that the "src" value is a web app context relative path (could
have thought of that myself...).
So the embedding of another page shouldn't be a problem.
Also thanks to Lance Java for helping with that, so there are at least two ways
to generate page links to a separate viewer page.
However, I would still like to know what I am doing wrong using a component for
doing the job. Must be something super obvious, I think.
@Thilo Tanner:
I'm a bit confused by your eventlink suggestion. I have probably omitted too
much information, it seems.
My setup is basically this:
A page containing two components
- a box containing information and a few buttons, one of which fires the event
which does some maintenance work and then bubbles up the event to the main
page. The main page changes the current document url page property and updates
the zone containing the document viewer (zone="someZone" and return
someZone.getBody() ).
- the document viewer component: it receives the document url property of the
main page as a parameter and returns the StreamResponse according to the
content of the property.
Is this what you mean by using event links? Or do you mean that I should update
the zone with the StreamResponse directly?
Regards,
Daniel P.
-----Ursprüngliche Nachricht-----
Von: Poggenpohl, Daniel [mailto:daniel.poggenp...@isst.fraunhofer.de]
Gesendet: Donnerstag, 19. Februar 2015 15:28
An: Tapestry users
Betreff: AW: PDF Viewer component
Hello,
well, embedding the component in a page shows not the PDF but the Java object
identity, e.g.
InlineViewingStreamResponse@8173c6
Maybe the error is somewhere else?
My component template is basically only ${showDocument()}.
Re: iframe - If I use an iframe for embedding a document viewer page, how do I
set the "src" parameter? I haven't found a more elegant way than
src="go\back\to\the\folder\containing\the\viewer".
Regards,
Daniel P.
-----Ursprüngliche Nachricht-----
Von: Thilo Tanner [mailto:thilo.tan...@reprisk.com]
Gesendet: Donnerstag, 19. Februar 2015 15:19
An: Tapestry users
Betreff: Re: PDF Viewer component
Hi Daniel,
What exactly is the issue with your code? We use something similar (and content
type "application/pdf"); see below.
I'm sure you will take care of it when the code works, but your implementation
is extremely dangerous :-)
Best,
Thilo
public abstract class AbstractStreamResponse implements StreamResponse {
private String contentType;
private String filename;
public AbstractStreamResponse(String contentType)
{
this.contentType = contentType;
}
public void setFilename(String filename)
{
this.filename = filename;
}
@Override
public String getContentType()
{
return contentType;
}
@Override
public void prepareResponse(Response response)
{
if(!Strings.isNullOrEmpty(filename)) {
try {
String encodedFilename = URLEncoder.encode(filename, "UTF-8");
response.setHeader("Content-Disposition",
String.format("attachment; filename=%s", encodedFilename));
} catch (UnsupportedEncodingException e) {
// skip
}
}
}
}
________________________________________
From: Poggenpohl, Daniel <daniel.poggenp...@isst.fraunhofer.de>
Sent: Thursday, February 19, 2015 15:06
To: Tapestry users
Subject: AW: PDF Viewer component
Hi,
a little bit more information (read: code)...
I know the code is imperfect but this was just a quick and dirty setup to try
inline document viewing.
My Viewer component:
public class Viewer {
@Parameter(required=true)
@Property
String documentUrl;
@Inject
Logger logger;
public StreamResponse showDocument() {
if ("".equals(documentUrl)) {
return null;
}
File pdf = new File(documentUrl);
return new InlineViewingStreamResponse (pdf);
}
My StreamResponse implementation:
public class InlineViewingStreamResponse implements StreamResponse {
File file;
public FileAttachment(File file) throws FileNotFoundException {
if (file != null && file.exists() && file.isFile()) {
this.file = file;
} else {
throw new FileNotFoundException();
}
}
@Override
public String getContentType() {
try {
return Files.probeContentType(file.toPath());
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
@Override
public InputStream getStream() throws IOException {
return new BufferedInputStream(new FileInputStream(file));
}
@Override
public void prepareResponse(Response response) {
response.setHeader("Content-Disposition", "inline; filename=" +
file.getName());
}
Regards,
Daniel P.
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