Primefaces downloadFile java.io.IOException: Stream Closed after second time

Question

I have issue with primefaces 5.0 component p:fileDownload , I have following bean store DefaultStreamedContent , and I get the value stored to download it simply :

Answer 1

I solved issue finally, I make new class store my data, and action that prepare stream to download from my class object, and when download file I read bytes from my class bytes, like the following:

Class:

public class Attachment implements Serializable {

    private String name;
    private String type;
    private String encoding;
    private byte[] data;

    // ... Setters and getters ...

    public Attachment () {
        this.encoding = "UTF-8";
    }

}

Bean:

public class MailBean implements Serializable {
    // alot of properties
    private Attachment attachment;
    // setters and getters
}

Managed Bean :

public class MailManagedBean implements Serializable {
    private DefaultStreamedContent attachmentToDownload;
    private MailBean mail;
    // @ here setter and getter too .

    public void prepare() {
        InputStream stream = new ByteArrayInputStream(mail.getAttachment.getData());
        attachmentToDownload = new DefaultStreamedContent(stream, mail.getAttachment.getType(), mail.getAttachment.getName(), mail.getAttachment.getEncoding());
    }
}

In XHTML file (I added action) :

<p:commandLink ajax="false" value="Download Attachment" 
    rendered="#{mbMail.mail.attachment != null}" action="#{mbMail.prepare()}">
    <p:fileDownload value="#{mbMail.attachmentToDownload}" />
</p:commandLink>