Re: Determining MIME types

FROM : Matthew Delves
DATE : Sat Jan 19 07:36:02 2008

On 19/01/2008, at 12:35 PM, j o a r wrote:

>
> On Jan 18, 2008, at 5:28 PM, Jim Puls wrote:
>

>> If you (simply) extract the extension from the end of a filename, 
>> you can get its UTI and then turn that in to a MIME type.

>
>
> I was just about to suggest the same resource. I only have a couple 
> of things to add:
>
> * Keep in mind that the mappings provided by that API is incomplete, 
> even for popular / common file types.
>


Still, something is better than nothing.

> * IIRC (and this is clearly not my area of expertise) if you're 
> downloading something over HTTP (and probably other protocols too) 
> the server can provide a MIME type that differs from the one you 
> would expect from just looking at the file name suffix. There might 
> not even be a file name suffix, but the server can still provide a 
> MIME type.


NSURLResponse provides a method for retrieving the MIME type, though 
what I would prefer is something which can be calculated from the 
filename.

I have managed to get the UTI from the file extension, though unsure 
about how to get the MIME type from the UTI.

Thanks,
Matthew Delves