Vaadin 7 how to download large files

Labels bug. Milestone 7. Copy link. Ansku self-assigned this Oct 26, Ensure Upload is properly reset after an upload is interrupted vaadi… ….

Ansku mentioned this issue Dec 19, Ensure Upload is properly reset after an upload is interrupted OlliTietavainenVaadin added a commit that referenced this issue Dec 20, Ensure Upload is properly reset after an upload is interrupted …. OlliTietavainenVaadin added this to the 7. OlliTietavainenVaadin closed this Jan 2, So, to repeat the subject line, how do we go about replicating this in Vaadin7?

Thanks very much in advance, ts. It is crucial to notice that clicking a Link or a PopupWindowOpener is a client-side operation. If you get the content of the dynamic PDF from the same UI state, you can not have the link or opener enabled, as then clicking it would not get the current UI content.

Instead, you have to create the resource object before the link or opener are clicked. This usually requires a two-step operation, or having the print operation available in another view. Imitating the approach, I can now create a two-button setup e. How about if you give the FileDownloader a StreamResource and generate the actual contents on-demand. So, during initialization I just give it a non-existent file and when the user clicks the button, the overriden handleConnectorRequest method first calls another method which creates a file and sets the fileDownloader resource to the newly created file.

Call to super then handles the actual download. This works fine if you have a button to which you can extend the downloader. However my problem is even worse. Each of these is an action, with its own run method that is each action does not have it's own button.

I can't figure out how to download the file once the action is run, since I can't extend anything. Does anyone have an idea? This is a major problem for me I know this is an issue for MenuItem cannot extend them for downloads, browser window opening. I suspect it won't work for Tree-based context menus based on Actions. Seems like there needs to be an entirely standard Vaadin mechanism to do this. Dynamic data downloads are extremely common. Fortunately, while the old StreamResource way is deprecated, it at least continues to work as well as under Vaadin 6.

You are right, I wrote that incorrectly. Using a StreamResource isn't deprecated, but the way of using it previously to trigger a download is. If you are using FileDownloader. If you attach your own click listener and create the StreamResource and then call something like:.

That is deprecated, but it still works. In Vaadin 6, this was getWindow. I guess it still suffers from potential popup blocker issues.

But this does not work for MenuItem or Table Action handlers because while you can click on them to trigger work, they are not subclasses of AbstractComponent, so we're still using the deprecated mechanism for those needs.

I am very dissappointed that there is no way to download generated on fly file. Who owns this outage? Building intelligent escalation chains for modern SRE. Podcast Who is building clouds for the independent developer? Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Linked 0. Related 4. Hot Network Questions.

Question feed. Th is c omponent has a common listener called AdvancedDownloaderListener. And, the chan ged file can be downloaded. The comp lete code with sample code is given below The vaadin framework is build up on GWT libraries.. But my favourate framework is wffweb. File; import java. FileInputStream; import java. FileNotFoundException; import java. IOException; import java. InputStream; import java. Logger; import com.