Decorator plugin for superagent.js, which lets you take actions on a response before the callback is fired.

agent_interceptor.coffee

# Use superagent's standard plugin architecture:
# superagent.get('/some/url').use(agentInterceptor).end(function(res){...});

agentInterceptor = (res) ->
  Request = superagent.Request
  oldCb = Request.prototype.callback
  Request.prototype.callback = (err, r) ->
    switch r.status
      when 404
        some404Func()
      when 500
        someErrorFunc()
      else
        oldCb.apply @, [err, r]
  
module.exports = agentInterceptor