How to find image file extension from byte array?

[Robert Jack]

Hi, I stored image as byte array into the database succesfully.

After that i want to show that image in my page. So i can get the byte array from the database.

Is possible to find the (image)file extension from that byte array.(png, jpeg, gif etc...)

please help me.

Thanks in advance.

[Wouter Oet]

Not sure if that is possible but why don't just just also store the mime-type in the database?

[Maneesh Godbole]

Indeed. In one scenario I had done exactly that.
I had a custom object with file name, mime type and byte[] data as variables.

[Rob Spoor]

For most image formats it should be possible to read the type from the first few bytes, but I still would store the image mime type or extension in the database instead.