how does downloadhelper work?
Sean Neilan
I am wondering how Video DownloadHelper works:
https://addons.mozilla.org/en-US/firefox/addon/3006
How does it know that an mp3 is playing in the browser? How does it know
that I'm loading a youtube video? How does it know if a flash app (or maybe
even an html 5 app) is playing an mp3?
It would be most appreciated if someone could point me in the right
direction. What should I be looking up?
Thank you for your time.
-Sean
Sébastien Lorquet
access the DOM in a tab and parse it to find <object> <video> nodes, then
use a plugin to download the real files accessed by these objects.
This is what I did before: display/get the page source, search for "wma",
"asx" or "mms://" and go from here.
other example, given a youtube URL I kown there is a way to access the real
file. Then you just need a regex to detect a youtube url, filter out the
video id, and run the "protocol" to download the real video file :)
there should be lots of templates, one (or more?) for each supported site.
Regards
Seb
> _______________________________________________
> dev-extensions mailing list
> dev-ext...@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-extensions
>
Sean Neilan
I was looking up something about the memory cache though. I
typed about:cache?device=memory into the url and found every single mp3 I
listened to. I could click on one of the urls & view all the data for it &
know it was an mp3 by the content-type.
I suppose if one can make an extension that automates firefox & uses the
memory cache, one can go and download lots of youtube videos or something
like that.
hujian...@gmail.com
But I think it is not just based on filter the page's html source. Because I found some sites, mp3/swf file is loaded dynamically. And there is no link referring to the file on source code.
在 2010年1月11日星期一UTC+8上午6时23分55秒，Sébastien Lorquet写道：
