A function to detect the act of posting by directly pasting by copy and paste
We want to prohibit anonymous users from doing the following
1. I want to prohibit users from posting images from the clipboard.
2. I want to prohibit anonymous users from downloading images that other users have posted from the clipboard.
I want administrators to have the following functions.
1. A function to detect images posted from the clipboard.
2. The ability to check the contents of images posted from the clipboard in a list, and the ability to delete inappropriate images.