Force the refresh of an Img

[Sytematic]

I use a Img() object to render an image. Then, using a servlet, I modify the image on the server.

Then I want to reload the image, force a redraw with the new version on the server. How to by-pass the caching from browsers?


I tried this:

myImg.resetSrc();

but to no avail.

NB: The servlet currently does not return the modified image, but an succes message, upon which I want to redownload the image. Should the server 'stream' the image back directly? If so, how to incorporate something like this in the DSRequest/DSResponse flow?

[Isomorphic]

To force a reload (for a servlet that's actually returning image data) add a parameter to the URL that changes every time.

But note that image download is built-in (viewFile/downloadFile APIs on DataSource - also getFileURL() API , recently added).

[Sytematic]

Okay, but the image is not bound to a dataSource. What is then the best approach? My thoughts would be:

1) somehow make sure it IS databound (ie. a field in a .ds.xml file)
2) create a different servlet, that directly streams the image, changing the URL slightly all the time.
3) ... ?

[Sytematic]

I fixed it, thanks for the info

[pepe4ever]

Can you decribe, how you have fixed it??

I would like also to refresh an image after changes on server....

[Sytematic]

I actually removed the Img object and added it again, and I made sure the filename was different. I found that only using a src="img.png?randomnumber123" did not work in all browsers.

So instead i gave the file a random filename each time it was changed.