update.lua

#!/usr/bin/lua
print"Content-type: text/html"
local arg={}
local qs=os.getenv"QUERY_STRING" or ""
for p in qs:gmatch"[^&]*" do                   -- seems to get all of the html arguments passed in
    local k,v=p:match"([^=]*)=(.*)"
    if k then
        arg[k]=v
    else
        table.insert(arg,p)
    end
end
local f=io.open("/var/www/jacob1/log.log","a") -- log request types, ip adresses, and mod versions of all requests
f:write(("%s\t%s\t%s\t%s\t%s\n"):format(arg.Action or "None",arg.Architecture or "None",arg.InstructionSet or "None",os.getenv"REMOTE_ADDR" or "None",os.getenv"HTTP_X_J1Mod_VERSION" or "None"))",os.getenv"HTTP_X_Auth_User" or "None"))
f:close()
if arg.Action=="CheckVersion" then             -- return the changelog, or the default 0 0 0 one if there is no changelog by that name
    local f=io.open(("Changelog_%s_%s.txt"):format(arg.Architecture or "Unknown",arg.InstructionSet or "Unknown")) or io.open"Changelog_Default.txt"
    local d=f:read"*a"
    print(("Content-Length: %d\n"):format(#d))
    io.write(d)
elseif arg.Action=="Download" then             -- return the update
    local d=io.open(("Update_%s_%s"):format(arg.Architecture or "Unknown",arg.InstructionSet or "Unknown")):read"*a"
    print(("Content-Length: %d\n"):format(#d))
    io.write(d)
else
    io.write"\nHello?"                     -- if no args, probably someone just clicked the link from a browser
end



sample changelog:
4 20 3
tIncrease the speed of the save browser and fix ancient missing thumbnail bug
gCompatibility with tpt++ powder.pref's (won't delete it's settings)
tFix ANIM pause bugs and some editing bugs
gAdd in many tpt++ element fixes
tFix differences in what can destroy elements between this and tpt
gHold ctrl when selecting a stamp to not reorder the list
tVersion 20.3: Fix crash glitch caused by my tpt++ STKM eaten by CONV fix


this says build 4, version 20.3. Then each line uses tpt's color format, that is what the g's and t's are. They should probably be deleted. This is titled Changelog_Windows32_SSE2.txt. You also need a Changelog_Default.txt that just says "0 0 0"