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MrRene
MrRene

Reputation: 194

How to open a generated file on Vaadin Flow?

On my app I want to open a generated PDF with PdfBox on a new tab, I have seen a couple of documentations but they are for old version of Vaadin or won't work in my case. I don't want to save it on the server or attach the file to any link or button, I want to write a method to automatically open it on a new tab.

PdfBox gives an option to save the file on an OutputStream, is there any way to open that OutputStream file on a new tab? Or at least download it without attaching it to an Anchor widget like Flow Viritin does?

Upvotes: 0

Views: 757

Answers (1)

kscherrer
kscherrer

Reputation: 5766

The problem lies in the fact that because you don't want to save the file on the server, you cannot then have a direct url of said file to link to. You also cannot pass the pdf file as parameter to another View.

The solution is to store the pdf in the VaadinSession (as byte[] is probably easiest), and when the user then opens another tab by clicking a certain anchor/routerlink, that view will read the pdf from the VaadinSession and add the it to the view. (How to display pdf with Vaadin 14). Please remember to remove the pdf again from the VaadinSession :)

Upvotes: 2

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