function _M.setDynamicRoute()

in scripts/lua/policies/backendRouting.lua [72:100]

• 27 lines of code
• 6 McCabe index (conditional complexity)

function _M.setDynamicRoute(obj)
  local whitelist = obj.whitelist
  for k in pairs(whitelist) do
    whitelist[k] = whitelist[k]:lower()
  end
  local header = obj.header ~= nil and obj.header or 'X-Cf-Forwarded-Url'
  local dynamicBackend = ngx.req.get_headers()[header]
  if dynamicBackend ~= nil and dynamicBackend ~= '' then
    local u = url.parse(dynamicBackend)
    if u.scheme == nil or u.scheme == '' then
      u = url.parse(utils.concatStrings({'http://', dynamicBackend}))
    end
    if utils.tableContains(whitelist, u.host) then
      ngx.req.set_uri(_M.getUriPath(u.path))
      
      
      local split = {string.match(dynamicBackend, '([^?]*)?(.*)')}
      local qs = split[2]
      if qs ~= nil then
        ngx.req.set_uri_args(qs)
      end
      setUpstream(u)
    else
      request.err(403, 'Dynamic backend host not part of whitelist.')
    end
  else
    logger.info('Header for dynamic routing not found. Defaulting to backendUrl.')
  end
end