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authorKim Alvefur <zash@zash.se>2019-01-06 10:39:33 +0100
committerKim Alvefur <zash@zash.se>2019-01-06 10:39:33 +0100
commit37374ae95e615cc02da0c64a43a7a30b7156fea4 (patch)
tree2b2a2608c757517d0a4a736cb2b5eea207edae15
parentbdfc36fc8caa83c2919c0df1f46b91232af09096 (diff)
downloadprosody-37374ae95e615cc02da0c64a43a7a30b7156fea4.tar.gz
prosody-37374ae95e615cc02da0c64a43a7a30b7156fea4.zip
util.http: Pre-generate urlencoding mappings (optimization)
Function calls are more expensive than table lookups
-rw-r--r--util/http.lua21
1 files changed, 11 insertions, 10 deletions
diff --git a/util/http.lua b/util/http.lua
index cfb89193..1730d4d4 100644
--- a/util/http.lua
+++ b/util/http.lua
@@ -6,24 +6,25 @@
--
local format, char = string.format, string.char;
-local pairs, ipairs, tonumber = pairs, ipairs, tonumber;
+local pairs, ipairs = pairs, ipairs;
local t_insert, t_concat = table.insert, table.concat;
+local url_codes = {};
+for i = 0, 255 do
+ local c = char(i);
+ local u = format("%%%02x", i);
+ url_codes[c] = u;
+ url_codes[u] = c;
+end
local function urlencode(s)
- return s and (s:gsub("[^a-zA-Z0-9.~_-]", function (c) return format("%%%02x", c:byte()); end));
+ return s and (s:gsub("[^a-zA-Z0-9.~_-]", url_codes));
end
local function urldecode(s)
- return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end));
+ return s and (s:gsub("%%%x%x", url_codes));
end
local function _formencodepart(s)
- return s and (s:gsub("%W", function (c)
- if c ~= " " then
- return format("%%%02x", c:byte());
- else
- return "+";
- end
- end));
+ return s and (urlencode(s):gsub("%%20", "+"));
end
local function formencode(form)