Craig Jorgensen created WICKET-5826:
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Summary: Add setContentType to DownloadLink
Key: WICKET-5826
URL: https://issues.apache.org/jira/browse/WICKET-5826
Project: Wicket
Issue Type: Improvement
Components: wicket
Affects Versions: 6.18.0
Reporter: Craig Jorgensen
Priority: Minor
I am generating an excel file when the DownloadLink is clicked on. Everything
worked fine when I was running locally for development (meaning Excel would
automatically start and my excel file would be loaded) but when I used our
webdev server, the file would get appended with an ".htm" and the browser would
try to display the excel file which resulted in garbage on the screen.
I eventually discovered that the contentType for the FileResourceStream in the
DownloadLink::onClick() method was set to null and there is no way (that I know
of to change it). I modified the DownloadLink slightly to allow this change.
If there is a better way to handle this, I would like to know it. Otherwise, I
would suggest adding my changes to the code.
Basically, I added a private member variable.
private String contentType = null;
to the DownloadLink class with a getter and a setter and modified the onClick()
method to allow me to set the FileResourceStream ContentType.
@Override
public void onClick()
{
final File file = getModelObject();
if (file == null)
{
throw new IllegalStateException(getClass().getName() +
" failed to retrieve a File object from model");
}
String fileName = fileNameModel != null ?
fileNameModel.getObject() : null;
if (Strings.isEmpty(fileName))
{
fileName = file.getName();
}
fileName = UrlEncoder.QUERY_INSTANCE.encode(fileName,
getRequest().getCharset());
IResourceStream resourceStream = new FileResourceStream(new
org.apache.wicket.util.file.File(file)) {
@Override
public String getContentType() {
return contentType;
}
};
getRequestCycle().scheduleRequestHandlerAfterCurrent(
new ResourceStreamRequestHandler(resourceStream)
{
@Override
public void respond(IRequestCycle requestCycle)
{
super.respond(requestCycle);
if (deleteAfter)
{
Files.remove(file);
}
}
}.setFileName(fileName)
.setContentDisposition(ContentDisposition.ATTACHMENT)
.setCacheDuration(cacheDuration));
}
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