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skynet-webportal/docker/nginx/conf.d/include/sia-auth

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rewrite_by_lua_block {
local b64 = require("ngx.base64")
-- open apipassword file for reading (b flag is required for some reason)
-- (file /etc/.sia/apipassword has to be mounted from the host system)
local apipassword_file = io.open("/data/sia/apipassword", "rb")
-- read apipassword file contents and trim newline (important)
local apipassword = apipassword_file:read("*all"):gsub("%s+", "")
-- make sure to close file after reading the password
apipassword_file.close()
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-- encode the user:password authorization string
-- (in our case user is empty so it is just :password)
local content = b64.encode_base64url(":" .. apipassword)
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-- set authorization header with proper base64 encoded string
ngx.req.set_header("Authorization", "Basic " .. content)
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}