113 lines
3.8 KiB
Lua
113 lines
3.8 KiB
Lua
local _M = {}
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-- constant tier ids
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local tier_id_anonymous = 0
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local tier_id_free = 1
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-- fallback - remember to keep those updated
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local anon_limits = {
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["tierID"] = tier_id_anonymous,
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["tierName"] = "anonymous",
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["upload"] = 655360,
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["download"] = 655360,
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["maxUploadSize"] = 1073741824,
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["registry"] = 250
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}
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-- handle request exit when access to portal should be restricted to authenticated users only
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function _M.exit_access_unauthorized(message)
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ngx.status = ngx.HTTP_UNAUTHORIZED
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ngx.header["content-type"] = "text/plain"
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ngx.say(message or "Portal operator restricted access to authenticated users only")
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return ngx.exit(ngx.status)
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end
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-- handle request exit when access to portal should be restricted to subscription users only
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function _M.exit_access_forbidden(message)
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ngx.status = ngx.HTTP_FORBIDDEN
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ngx.header["content-type"] = "text/plain"
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ngx.say(message or "Portal operator restricted access to users with active subscription only")
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return ngx.exit(ngx.status)
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end
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function _M.accounts_enabled()
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return os.getenv("PORTAL_MODULES"):match("a") ~= nil
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end
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function _M.get_account_limits()
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local cjson = require('cjson')
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if ngx.var.skynet_jwt == "" then
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return anon_limits
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end
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if ngx.var.account_limits == "" then
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local httpc = require("resty.http").new()
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-- 10.10.10.70 points to accounts service (alias not available when using resty-http)
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local res, err = httpc:request_uri("http://10.10.10.70:3000/user/limits?unit=byte", {
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headers = { ["Cookie"] = "skynet-jwt=" .. ngx.var.skynet_jwt }
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})
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-- fail gracefully in case /user/limits failed
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if err or (res and res.status ~= ngx.HTTP_OK) then
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ngx.log(ngx.ERR, "Failed accounts service request /user/limits?unit=byte: ", err or ("[HTTP " .. res.status .. "] " .. res.body))
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ngx.var.account_limits = cjson.encode(anon_limits)
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elseif res and res.status == ngx.HTTP_OK then
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ngx.var.account_limits = res.body
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end
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end
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return cjson.decode(ngx.var.account_limits)
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end
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-- detect whether current user is authenticated
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function _M.is_authenticated()
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if not _M.accounts_enabled() then return false end
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local limits = _M.get_account_limits()
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return limits.tierID > tier_id_anonymous
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end
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-- detect whether current user has active subscription
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function _M.has_subscription()
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local limits = _M.get_account_limits()
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return limits.tierID > tier_id_free
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end
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function _M.is_auth_required()
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-- authentication is required if mode is set to "authenticated"
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-- or "subscription" (require active subscription to a premium plan)
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return os.getenv("ACCOUNTS_LIMIT_ACCESS") == "authenticated" or _M.is_subscription_required()
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end
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function _M.is_subscription_required()
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return os.getenv("ACCOUNTS_LIMIT_ACCESS") == "subscription"
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end
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function is_access_always_allowed()
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-- options requests do not attach cookies - should always be available
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-- requests should not be limited based on accounts if accounts are not enabled
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return ngx.req.get_method() == "OPTIONS" or not _M.accounts_enabled()
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end
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-- check whether access is restricted if portal requires authorization
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function _M.is_access_unauthorized()
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if is_access_always_allowed() then return false end
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-- check if authentication is required and request is not authenticated
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return _M.is_auth_required() and not _M.is_authenticated()
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end
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-- check whether user is authenticated but does not have access to given resources
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function _M.is_access_forbidden()
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if is_access_always_allowed() then return false end
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-- check if active subscription is required and request is from user without it
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return _M.is_subscription_required() and not _M.has_subscription()
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end
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return _M
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