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@@ -465,12 +465,13 @@ E.g.: `127.0.0.1:80,[::1]:80,x/tmp/sockname` will listen to localhost
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http connections using IPv4, IPv6 and the domain socket `/tmp/sockname`.
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### lua\_background\_script
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-Experimental feature, and subject to change.
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Run a Lua script in the background, independent from any connection.
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The script is started before network access to the server is available.
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It can be used to prepare the document root (e.g., update files, compress
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files, ...), check for external resources, remove old log files, etc.
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+The script can define callbacks to be notified when the server starts
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+or stops. Furthermore, it can be used for log filtering or formatting.
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The Lua state remains open until the server is stopped.
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For a detailed descriotion of available Lua callbacks see section
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@@ -1091,6 +1092,9 @@ A Lua background script may define the following functions:
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`stop()` -- called when the server is stopped
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`log(req, res)` -- called when an access log entry is created
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+The return values of `start` and `stop` are ignored. The `start` callback can be used
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+to create timers.
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+
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The optional function `log` may be used to filter or format access log file entries.
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The `request_info` table is supplied as first argument (content of this table: see above).
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The second argument is the request processing result. It contains the number of bytes
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