How to make input type= file Should accept only pdf and xls

Question

I used

Now I would like to restrict this by accepting only .pdf and .xls files.

When I click the s

Answer 1

Unfortunately, there is no guaranteed way to do it at time of selection.

Some browsers support the accept attribute for input tags. This is a good start, but cannot be relied upon completely.

You can use a cfinput and run a validation to check the file extension at submission, but not the mime-type. This is better, but still not fool-proof. Files on OSX often have no file extensions or users could maliciously mislabel the file types.

ColdFusion's cffile can check the mime-type using the contentType property of the result (cffile.contentType), but that can only be done after the upload. This is your best bet, but is still not 100% safe as mime-types could still be wrong.