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64 lines
1.7 KiB
64 lines
1.7 KiB
-- Prosody IM
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-- Copyright (C) 2013 Florian Zeitz
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local format, char = string.format, string.char;
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local pairs, ipairs, tonumber = pairs, ipairs, tonumber;
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local t_insert, t_concat = table.insert, table.concat;
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local function urlencode(s)
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return s and (s:gsub("[^a-zA-Z0-9.~_-]", function (c) return format("%%%02x", c:byte()); end));
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end
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local function urldecode(s)
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return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end));
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end
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local function _formencodepart(s)
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return s and (s:gsub("%W", function (c)
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if c ~= " " then
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return format("%%%02x", c:byte());
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else
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return "+";
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end
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end));
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end
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local function formencode(form)
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local result = {};
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if form[1] then -- Array of ordered { name, value }
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for _, field in ipairs(form) do
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t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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end
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else -- Unordered map of name -> value
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for name, value in pairs(form) do
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t_insert(result, _formencodepart(name).."=".._formencodepart(value));
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end
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end
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return t_concat(result, "&");
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end
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local function formdecode(s)
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if not s:match("=") then return urldecode(s); end
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local r = {};
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for k, v in s:gmatch("([^=&]*)=([^&]*)") do
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k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
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k, v = urldecode(k), urldecode(v);
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t_insert(r, { name = k, value = v });
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r[k] = v;
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end
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return r;
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end
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local function contains_token(field, token)
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field = ","..field:gsub("[ \t]", ""):lower()..",";
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return field:find(","..token:lower()..",", 1, true) ~= nil;
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end
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return {
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urlencode = urlencode, urldecode = urldecode;
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formencode = formencode, formdecode = formdecode;
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contains_token = contains_token;
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};
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