My question is not deeply technical but more of a system architectural one.
I'm designing an API backend in Go Lang. I'd like to have several clients, like a web server, cell phones etc.. I imagine that all these clients should have a secret API key so to validate that they can use the API. At the same time the web frontend is going to have a lot of users with different restrictions. I'd like for these users to be able to log in with their facebook or Google account. That should require OAuth authentication as I understand. My question is now where should I add the OAuth. Only in the frontend and then save the user in session or also between the frontend and the backend. I'm highly confused about how I should set up this communication and authentication.
I'm building the web server in PHP and I'd like the web frontend to be really light weight and more or less only function as en empty shell/view for the Go API. I've build systems in plain PHP/MySQL before but I'd like to make a shift to Go based APIs.
How would a URI look like to the API from the web server frontend for let's say a show profile page? I imagine something like a GET call to "http.//backend.com:3000/[api-key]/[api-secret][oauth-token?]/profile. Then some middleware to authenticate the web client and another piece of middleware to authenticate the user. Would that be "the right" approach?
I hope you guys can point me in the right direction.
Thanks in advance.
If you look at your facebook or google developer docs, you will find examples on how to integrate with their oauth login systems.
OAuth, or at least the last step of it, really must be done on the back end as you have to assume your front end is a bad guy hitting your system.
For go oauth, take a look at: https://github.com/golang/oauth2
You will likely have a http.HandlerFunc("/oauth/google",yourGoogleFunc) and http.HandlerFunc("/oauth/facebook",yourFBFunc) type thing, then you register that URL on your dev account with those companies.
while testing, it's easiest to use localhost:8080 (or whatever) as the callback url so it works on any machine as long as you are using a local browser.