34 lines
1.3 KiB
Lua
34 lines
1.3 KiB
Lua
-- httpserver-static.lua
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-- Part of nodemcu-httpserver, handles sending static files to client.
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-- Author: Marcos Kirsch
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return function (connection, req, args)
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dofile("httpserver-header.lc")(connection, 200, args.ext, args.gzipped)
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--print("Begin sending:", args.file)
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-- Send file in little chunks
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local continue = true
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local size = file.list()[args.file]
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local bytesSent = 0
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local chunkSize = 1024 -- @TODO: can chunkSize be larger?
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while continue do
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collectgarbage()
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-- NodeMCU file API lets you open 1 file at a time.
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-- So we need to open, seek, close each time in order
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-- to support multiple simultaneous clients.
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file.open(args.file)
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file.seek("set", bytesSent)
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local chunk = file.read(chunkSize)
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file.close()
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connection:send(chunk)
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bytesSent = bytesSent + #chunk
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chunk = nil
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--print("Sent: " .. bytesSent .. " of " .. size)
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-- nodemcu-firmware disallows queueing send operations,
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-- so we must call coroutine.yield() after every connection:send()
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-- The onSent() will resume us. But only yield if we aren't done yet!
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if bytesSent == size then continue = false else coroutine.yield() end
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end
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--print("Finished sending: ", args.file)
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end
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