How to check allowed characters after image upload while tweet from mobile API App?

iamkarthikavi · 2016-02-26T05:51:09.096Z

I’m working on mobile API and I’m facing issue to validate charater while uploading an image from media.
Can anyone please let me know how to validate charaters?
Any lead / reference is also fine.

ePirat · 2016-02-26T07:10:22.838Z

What exactly do you mean by “validate characters”?