ca4fb20c00
* 1st draft to serve static files faster * Allow serving 5 images in a page the 6th image cannot be served as the esp does not open more than 5 connections at the same time * win the prize * Update comments
49 lines
1.4 KiB
Lua
49 lines
1.4 KiB
Lua
-- httpserver-buffer
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-- Part of nodemcu-httpserver, provides a buffer that behaves like a connection object
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-- that can handle multiple consecutive send() calls, and buffers small payloads up to 1400 bytes.
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-- This is primarily user to collect the send requests done by the head script.
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-- The owner is responsible to call getBuffer and send its result
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-- Author: Gregor Hartmann
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local Buffer = {}
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-- parameter is the nodemcu-firmware connection
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function Buffer:new()
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local newInstance = {}
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newInstance.size = 0
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newInstance.data = {}
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-- Returns true if there was any data to be sent.
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function newInstance:getBuffer()
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local buffer = table.concat(self.data, "")
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self.data = {}
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self.size = 0
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return buffer
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end
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function newInstance:getpeer()
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return "no peer"
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end
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function newInstance:send(payload)
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local flushThreshold = 1400
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if (not payload) then print("nop payload") end
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local newSize = self.size + payload:len()
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if newSize >= flushThreshold then
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print("Buffer is full. Cutting off "..newSize-flushThreshold.." chars")
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--STEP1: cut out piece from payload to complete threshold bytes in table
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local pieceSize = flushThreshold - self.size
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if pieceSize then
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payload = payload:sub(1, pieceSize)
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end
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end
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table.insert(self.data, payload)
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self.size = self.size + #payload
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end
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return newInstance
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end
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return Buffer
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