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110 lines
2.8 KiB
110 lines
2.8 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 = pairs, ipairs;
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local t_insert, t_concat = table.insert, table.concat;
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local url_codes = {};
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for i = 0, 255 do
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local c = char(i);
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local u = format("%%%02x", i);
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url_codes[c] = u;
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url_codes[u] = c;
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url_codes[u:upper()] = c;
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end
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local function urlencode(s)
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return s and (s:gsub("[^a-zA-Z0-9.~_-]", url_codes));
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end
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local function urldecode(s)
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return s and (s:gsub("%%%x%x", url_codes));
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end
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local function _formencodepart(s)
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return s and (urlencode(s):gsub("%%20", "+"));
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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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local function normalize_path(path, is_dir)
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if is_dir then
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if path:sub(-1,-1) ~= "/" then path = path.."/"; end
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else
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if path:sub(-1,-1) == "/" then path = path:sub(1, -2); end
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end
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if path:sub(1,1) ~= "/" then path = "/"..path; end
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return path;
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end
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--- Parse the RFC 7239 Forwarded header into array of key-value pairs.
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local function parse_forwarded(forwarded)
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if type(forwarded) ~= "string" then
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return nil;
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end
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local fwd = {}; -- array
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local cur = {}; -- map, to which we add the next key-value pair
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for key, quoted, value, delim in forwarded:gmatch("(%w+)%s*=%s*(\"?)([^,;\"]+)%2%s*(.?)") do
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-- FIXME quoted quotes like "foo\"bar"
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-- unlikely when only dealing with IP addresses
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if quoted == '"' then
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value = value:gsub("\\(.)", "%1");
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end
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cur[key:lower()] = value;
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if delim == "" or delim == "," then
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t_insert(fwd, cur)
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if delim == "" then
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-- end of the string
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break;
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end
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cur = {};
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elseif delim ~= ";" then
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-- misparsed
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return false;
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end
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end
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return fwd;
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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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normalize_path = normalize_path;
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parse_forwarded = parse_forwarded;
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};
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