wxbty commented on code in PR #9660: URL: https://github.com/apache/apisix/pull/9660#discussion_r1258184450
########## apisix/stream/xrpc/protocols/dubbo/init.lua: ########## @@ -0,0 +1,212 @@ +-- +-- Licensed to the Apache Software Foundation (ASF) under one or more +-- contributor license agreements. See the NOTICE file distributed with +-- this work for additional information regarding copyright ownership. +-- The ASF licenses this file to You under the Apache License, Version 2.0 +-- (the "License"); you may not use this file except in compliance with +-- the License. You may obtain a copy of the License at +-- +-- http://www.apache.org/licenses/LICENSE-2.0 +-- +-- Unless required by applicable law or agreed to in writing, software +-- distributed under the License is distributed on an "AS IS" BASIS, +-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +-- See the License for the specific language governing permissions and +-- limitations under the License. +-- +local core = require("apisix.core") +local sdk = require("apisix.stream.xrpc.sdk") +local xrpc_socket = require("resty.apisix.stream.xrpc.socket") +local ffi = require("ffi") +local ffi_str = ffi.string +local math_random = math.random +local OK = ngx.OK +local DECLINED = ngx.DECLINED +local DONE = ngx.DONE +local bit = require("bit") + +-- dubbo protocol spec: https://cn.dubbo.apache.org/zh-cn/overview/reference/protocols/tcp/ +local protocol_name = "dubbo" +local header_len = 16 + +local _M = {} + +function _M.init_downstream(session) + session.req_id_seq = 0 + session.resp_id_seq = 0 + session.cmd_labels = { session.route.id, "" } + return xrpc_socket.downstream.socket() +end + +local function parse_dubbo_header(header) + local magic_number = string.format("%04x", header:byte(1) * 256 + header:byte(2)) + local message_flag = header:byte(3) + local status = header:byte(4) + local request_id = 0 + for i = 5, 12 do + request_id = request_id * 256 + header:byte(i) + end + local data_length = header:byte(13) * 16777216 + header:byte(14) * 65536 + header:byte(15) * 256 + header:byte(16) + + local is_request = bit.band(bit.rshift(message_flag, 7), 0x01) == 1 and 1 or 0 + local is_two_way = bit.band(bit.rshift(message_flag, 6), 0x01) == 1 and 1 or 0 + local is_event = bit.band(bit.rshift(message_flag, 5), 0x01) == 1 and 1 or 0 + + return { + magic_number = magic_number, + message_flag = message_flag, + is_request = is_request, + is_two_way = is_two_way, + is_event = is_event, + status = status, + request_id = request_id, + data_length = data_length + } +end + +local function read_data(sk, is_req) + local header_data, err1 = sk:read(header_len) + if not header_data then + core.log.warn("failed to read Dubbo request header: ", err1) + return + end + + local header_str = ffi_str(header_data, header_len) Review Comment: ok -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
