Screen grabber12/26/2023 The VNC Viewer application will keep alive when you disconnect the RDP session and continue to render Flash. To get around this install VNC Server and VNC Viewer, connect to a remote desktop session on your server and then open VNC Viewer to the local machine and run the application in the VNC Viewer window. Events not Firing – Waiting for the page load to complete is not always accurate, we’ve got around this by waiting a maximum amount of time for a page to load and then just skipping to the next entry if no page load event fires.įlash requires a “screen” to render, if there’s no active session, such as disconnected remote desktop session, Flash will appear as white boxes in your screenshots. To get around this is not too difficult and is explained later.Ĥ. Flash – Typically flash will appear as a white box when the screenshot render happens if it’s “wmode” is not set to “transparent” so we actively change this when the page loads.įlash does not render unless there’s an active window running, which is annoying especially it you run this on a remote desktop session (if you close the RDP window flash will not render on the screenshot grabber). Using XULRunner and a modified version of Selenium’s promptService.js we managed to overcome this problem.ģ. Prompts – alert boxes, confirm boxes all sorts of modal dialogs can stop the automated process in its tracks and require a user to push a button. Browser vulnerabilities – we didn’t want to use an Internet Explorer based solution so we opted for a Mozilla based solution using XULRunner.Ģ. Issues we had to Overcome to create an Automated Screen Grabberġ. So to give something back to the community we’re offering up some code we use in-house for a new project we are working on and we believe it may be the only XUL based automated screen grabber available at the moment. There are plenty of screenshot widgets for Firefox which is a great place to start. ![]() We’d rather not use Internet Explorer as the automated system might come across a website that exploits vulnerabilities in IE, so we wanted to use Firefox/Mozilla or a Chrome based solution. Most of the examples that do exist are Internet Explorer based solutions. We have a requirement to do some screen grabbing and whilst there’s plenty of solutions for manual screen grabs there’s not much in the way of availability for automated screen grabs, as in, you feed an application a list of websites you want to get screenshots of and walk away from the computer. This post is over 12 years old - it might be slightly outdated and consigned to the history books.
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