How to dowload folders from a Documents Library using code?

Question

Here's the thing: I need to add a button in the page that users can use to download a whole library to their computers.. BUT they must not be able to edit these folders! So I cannot make the button open the documents in a Explorer Window because they may erase or cut any file or folder by mistake, so I just need to add a button in the page which allows the users to download a copy of these folders in their computers, any idea how? (any javascript or html solution?)

Answer 1

For sharepoint on premise,

You can implement "Download as Zip" Custom Action into your ribbon. You can refer to this link as a sample http://adicodes.com/download-files-as-zip-file-in-sharepoint