--- a/net/http/server.lua	Fri Nov 01 22:30:35 2019 +0100
+++ b/net/http/server.lua	Fri Nov 01 22:31:15 2019 +0100
@@ -13,6 +13,7 @@
 local tostring = tostring;
 local cache = require "util.cache";
 local codes = require "net.http.codes";
+local promise = require "util.promise";
 local errors = require "util.error";
 local blocksize = 2^16;
 
@@ -191,6 +192,13 @@
 		body = result;
 	elseif errors.is_err(result) then
 		body = events.fire_event("http-error", { request = request, response = response, code = result.code, error = result });
+	elseif promise.is_promise(result) then
+		result:next(function (ret)
+			handle_result(request, response, ret);
+		end, function (err)
+			handle_result(request, response, err);
+		end);
+		return true;
 	elseif result_type == "table" then
 		for k, v in pairs(result) do
 			if k ~= "headers" then