JavaScript Use JS to get at blob-ified image listed in Chrome DevTools

[Swamp Thing]

Can JavaScript access a "blob" type image resource that has been loaded as part of a web page, and is then visible in the Networks tab as well as under Application > Frames > Image ... ?

In the scenario I am looking at, the page is open, and the image is visible in the browser to the user. It is also available for previewing in DevTools... but the URL won't work, maybe because the server expires it soon after page load.

So I would like to get the image data in say Base64 format or in Data URI format without needing to request the URL from the server. This I would like to do by pasting code into the console.

 

[pbuk]

Can JavaScript access a "blob" type image resource that has been loaded as part of a web page, and is then visible in the Networks tab as well as under Application > Frames > Image ... ?

No, there is no access to the binary data forming an img from JavaScript (unless that image was originally loaded from a dataUri or Base64 src of course).

If you are intent on violating the copyright owners rights then take a screen grab. Alternatively, FireFox developer tools allows you to download the image from the Response tab in Network rather than just preview it.