-function urlencode(s) return s and (s:gsub("[^a-zA-Z0-9.~_-]", function (c) return format("%%%02x", c:byte()); end)); end
-function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end)); 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));
-end
-
-function formencode(form)
- local result = {};
- if form[1] then -- Array of ordered { name, value }
- for _, field in ipairs(form) do
- t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
- end
- else -- Unordered map of name -> value
- for name, value in pairs(form) do
- t_insert(result, _formencodepart(name).."=".._formencodepart(value));
- end
- end
- return t_concat(result, "&");
-end
-
-function formdecode(s)
- if not s:match("=") then return urldecode(s); end
- local r = {};
- for k, v in s:gmatch("([^=&]*)=([^&]*)") do
- k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
- k, v = urldecode(k), urldecode(v);
- t_insert(r, { name = k, value = v });
- r[k] = v;
- end
- return r;
-end
-
-local function request_reader(request, data, startpos)