function _M.process()

in scripts/lua/oauth/facebook.lua [58:74]

• 13 lines of code
• 3 McCabe index (conditional complexity)

function _M.process(dataStore, token)

  local headerName = utils.concatStrings({'http_', 'x-facebook-app-token'}):gsub("-", "_")

  local facebookAppToken = ngx.var[headerName]
  if facebookAppToken == nil then
    request.err(401, 'Facebook requires you provide an app token to validate user tokens. Provide a X-Facebook-App-Token header')
    return nil
  end

  local result = dataStore:getOAuthToken('facebook', utils.concatStrings({token, facebookAppToken}))
  if result ~= ngx.null then
    return cjson.decode(result)
  end

   return exchangeOAuthToken(dataStore, token, facebookAppToken)
end