49 lines
1.2 KiB
Lua
49 lines
1.2 KiB
Lua
function webfingerCallback(cfg)
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local args, err = ngx.req.get_uri_args()
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if err == "truncated" then
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return false, 'uri args too long'
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end
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local resource = args['resource']
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if resource ~= nil then
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-- TODO this is O(n) but we can make it O(1) by doing a funny and making
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-- cfg.accounts be transformed into keys in a table
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--
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-- this would require us to do some setup() callback as well as
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-- the request() callback
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for _, account in ipairs(cfg.accounts) do
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if resource == account then
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return true
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end
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end
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end
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return false
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end
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return {
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name='WebfingerAllowlist',
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author='luna@l4.pm',
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title='Webfinger Allowlist',
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description=[[
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Prevent unecessary DB load by discarding requests to users that we know
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won't exist.
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Useful for small instances.
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]],
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apiVersion=1,
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callbacks = {
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['/.well-known/webfinger'] = webfingerCallback
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},
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config={
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['accounts'] = {
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type='table',
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value={
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type='string',
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description='ap id'
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},
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description = 'list of account ids (in email@domain form) to pass through to AP'
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}
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},
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}
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