查找当前版本和Adobe最新版本的Flash

Question

Recently, we found that Firefox had made a change towards plugins, such that the user will be temporarily blocked from running them if they are not using the latest version. Our site requires Flash to play sound and interact with the user's webcam/microphone, so we need to do whatever we can to ensure they're not getting these warnings.

One way suggested to me is to create a small Flash control, and wait for it to tell Javascript that it's been initialized. If not (and the user is using Firefox) then they are taken to a page prompting them to update. This may work, but I worry about its reliability, and about running it on every page in our site.

Alternatively, I've been researching a way to use Javascript to detect versions, without making a Flash control. I not only need the user's current version of Flash, but also the version Firefox will expect - and I haven't found an autonomous way of doing so. I don't want an admin to have to change a small value each time Adobe releases a new version. Does anyone have any advice how I could find Flash's latest available version, or an alternate way to solve my problem?

Answer 1

我建议您看看SWFOject和Express Install选项，它们应该可以大大简化升级。

Answer 2

I just noticed someone upvoting this question, so I thought that I would provide my eventual solution, which I think reduced the impact of a recent issue where Firefox blocked the most recent edition of Flash, pending Adobe's fix.

Basically, I went with a variation on the second paragraph in my question. It does not direct the user to a new page; instead, it opens a dialog over the current page that explains it's having issues communicating with Flash. (It does not specifically say "Your Flash is out of date" because this can also happen if the browser is hiding flash under a Yes/No user dialog). It also contains a small fake flash object, with the idea being that if the browser wants to display a security warning, accept prompt, etc., it can do it inside that space.

The dialog goes away on its own if said Flash control ends up making its callback to JavaScript. It also installs a variable under sessionStorage so we don't bother checking for it again (Flash takes enough time on some computers that you might see the dialog for a split second).