net.http: Add formdecode to decode an urlencoded form

net/http.lua

@@ -38,6 +38,7 @@ local function _formencodepart(s)
 		end
 	end));
 end
+
 function formencode(form)
 	local result = {};
 	for _, field in ipairs(form) do
@@ -46,6 +47,18 @@ function formencode(form)
 	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)
 	if not request.parser then
 		local function success_cb(r)