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skynet-webportal/docker/nginx/libs/skynet/account.lua

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