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tools/http-status-codes.lua @ 10571:cfeb0077c9e9
net.server_epoll: Avoid concatenating buffer with single item
Saves creating a string that'll be identical to buffer[1] anyways, as
well as a C function call. Depending on Lua version and length of the
string, this could be reusing an interned string, but a longer one would
probably be duplicated for no reason.
Having exactly one item in the buffer seems like it would be fairly
common, but I have not done an extensive study. If opportunistic writes
are enabled then it will be even more likely.
This special case could be optimized like this in table.concat but it
does not look like it is.
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 28 Dec 2019 06:18:58 +0100 |
parent | 9166:cce55767004a |
child | 12271:f31bb79f51d7 |
rev | line source |
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9166
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tools: Add a tool to generate net.http.codes from IANA registry
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1 -- Generate net/http/codes.lua from IANA HTTP status code registry |
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2 |
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3 local xml = require "util.xml"; |
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4 local registry = xml.parse(io.read("*a")); |
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5 |
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6 io.write([[ |
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7 |
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8 local response_codes = { |
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9 -- Source: http://www.iana.org/assignments/http-status-codes |
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10 ]]); |
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11 |
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12 for record in registry:get_child("registry"):childtags("record") do |
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13 -- Extract values |
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14 local value = record:get_child_text("value"); |
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15 local description = record:get_child_text("description"); |
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16 local ref = record:get_child_text("xref"); |
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17 local code = tonumber(value); |
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18 |
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19 -- Space between major groups |
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20 if code and code % 100 == 0 then |
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21 io.write("\n"); |
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22 end |
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23 |
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24 -- Reserved and Unassigned entries should be not be included |
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25 if description == "Reserved" or description == "Unassigned" or description == "(Unused)" then |
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26 code = nil; |
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27 end |
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28 |
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29 -- Non-empty references become comments |
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30 if ref and ref:find("%S") then |
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31 ref = " -- " .. ref; |
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32 else |
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33 ref = ""; |
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34 end |
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35 |
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36 io.write((code and "\t[%d] = %q;%s\n" or "\t-- [%s] = %q;%s\n"):format(code or value, description, ref)); |
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37 end |
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38 |
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39 io.write([[}; |
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40 |
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41 for k,v in pairs(response_codes) do response_codes[k] = k.." "..v; end |
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42 return setmetatable(response_codes, { __index = function(_, k) return k.." Unassigned"; end }) |
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43 ]]); |