steve-jansen/json-proxy — pull request #15 by ehtb (2014-07-21 09:38:08+00:00)
Title: Proxy headers now also take a function

Use it like this:

```
'Authorization': function(req) {
accessToken = (req.user && req.user.access_token) ? req.user.access_token : 'api_token'
return 'Bearer '.concat(accessToken)
}
```