Send download link after Bitcoin payment

I'm starting an online business. My website is hosted on OVH. I would like to send a download link after a bitcoin payment.

• Are there specific stuffs I should be aware of?
• Is this difficult to develop? (I have a bit of experience with JS, JAVA HTML/CSS)
• Is it safe to store the file directly on my FTP?
• Do external websites already provide this kind of services?
• What could be the best language to use with the blockchain api?

Just to be more specific:

The scheme of the whole think would be:

• user: I'm interested in your product
• server: Please pay for it with your bitcoins
• user: ok I'll do that I'll go on your dedicated page
• server: Ok we received your payment you just received a link for you to download our file.
• user: thanks it works!

Your help is appreciated.

• You should be aware of all the security issues around Bitcoin, if you're receiving funds to your own bitcoin wallet you need to keep that secure and if you're using a service you need to make sure you don't rely on it too heavily or keep too many funds in it's hands

• It is difficult to develop on your own as you should really have an offline wallet for the BTC. If you just create a php script loaded with 100 Bitcoin addresses you can get by with a small store and no Bitcoin-specific code.

• Is it safe to store the file directly on FTP? Yes… also if it's not protected the link could be shared.

• http://coinbase.com are probably the leading provider of this service

• blockchain.info provides official API libraries for Python, Java, .NET (C#), Tuby, PHP and Node - so whichever of those you know best.