Want custom title / image / description in facebook share link from a flash app

Question

Possible Duplicate:
How does Facebook Sharer select Images?

I am making a flash app that demonstrates potensial traffic injuries when driving at different speeds. I want the user to be able to share this information on facebook. However this demands that i can customize the text that will appear on facebook in some manner.

I am making an url that is opened in a blank window (from the flash app itself). I specify the u and t parameters, putting the generated message as the t parameter. But this seems to always be overridden by the pages title. If i omit the title tag from the html code, the file name is used (also overriding the specified title).

http://www.facebook.com/sharer.php?u=http://espentokerud.com/face/addiste.html&t;=test;

I also tried url-encoding the url, but to no avail.

http://www.facebook.com/sharer.php?u=http%3a%2f%2fespentokerud.com%2fface%2faddiste.html&t;=test;

I also tried using the addthis API, but experience the same shortcomings. The funny thing is that if i post a swf, the title and description can be customized, and it is also possible to specify a screenshot. But if i dont post a swf, this seems to be ignored.

I am aware that I can use meta tags on the html page to specify the thumbnail image, title and description, but some of this content has to be based on calculations inside the flash app.

Answer 1

2016 Update

Use the Sharing Debugger to figure out what your problems are.

Make sure you're following the Facebook Sharing Best Practices.

Make sure you're using the Open Graph Markup correctly.

Original Answer

I agree with what has already been said here, but per documentation on the Facebook developer site, you might want to use the following meta tags.

<meta property="og:title" content="title" />
<meta property="og:description" content="description" />
<meta property="og:image" content="thumbnail_image" />

If you are not able to accomplish your goal with meta tags and you need a URL embedded version, see @Lelis718's answer below.