Serving colour/non-colour pictures based on phone capabilities

[favian]

Hi. I need a script that can detect if a mobile phone is able to read colour (jpg, gif)/black and white (wbmp) graphics so i can serve pictures based on whether the phone can read those file types.

Is there anyone who knows how this can be done? Thanks.

[Tumpelo]

Hello!

From phones UAProf file you can check what the phone support.

-Tum-

[pokorny]

You can try to read the environment variable HTTP_ACCEPT.
In this Variable the browser should list all suported MIME Types.
i.e:
HTTP_ACCEPT 'image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*'

[favian]

Thanks. I am able to read the HTTP_ACCEPT header. However I notice that some monochrome phones also accept .gif format. Do you know how I can differentiate a monochrome phone browser from a colour one from the HTTP_ACCEPT header information?

[pokorny]

No I don't think so.
But you might check the HTTP_USER_AGENT variable and check it against a list of capabilities.
On comprehensive list is the WURFL.xml
You will find it at www.wurfl.com