RE: Connect your Bot to the World - XML, JSON, Web Services, HTML Scraping, Twitter, Facebook, Telegram, Email

Not sure I understand.
What is the file, and what do you want the bot to do with it?

In general you can add a link to a bot's message to link a file.
You can upload the file to any file hosting service such as Drop Box to get a link for it. The bot's also have there own file repository you can create a link in if you wish. But basically you need to upload the file somewhere and return the link to it in the bot's message.

i.e.
bot: Here is a link https://www.dropbox.com/EERGRTRTHTH.zip

or,
bot: Here is a <a href="https://www.dropbox.com/EERGRTRTHTH.zip">file</a>