nic-chen commented on code in PR #9660:
URL: https://github.com/apache/apisix/pull/9660#discussion_r1254237516


##########
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:
   Maybe we could parse it directly, not convert it to string before parsing ?
   



##########
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)
+    local header_info = parse_dubbo_header(header_str)
+
+    local is_valid_magic_number = header_info.magic_number == "dabb"
+    if not is_valid_magic_number then
+        return true, nil, false
+    end
+
+    local body_data, err = sk:read(header_info.data_length)
+    if not body_data then
+        core.log.warn("failed to read Dubbo request body: ", err)
+        return nil, err, false
+    end
+    ngx.ctx.dubbo_serialization_id = bit.band(header_info.message_flag, 0x1F)
+    if is_req then
+        ngx.ctx.dubbo_req_body_data = body_data
+    else
+        ngx.ctx.dubbo_rsp_body_data = body_data
+    end
+
+
+    return true, nil, false
+end
+
+local function read_req(sk)
+    return read_data(sk, true)
+end
+
+local function read_reply(sk)
+    return read_data(sk, false)
+end
+
+local function handle_reply(session, sk)
+    local ok, err = read_reply(sk)
+    if not ok then
+        return nil, err
+    end
+
+    local ctx = sdk.get_req_ctx(session, 10)
+
+    return ctx
+end
+
+function _M.from_downstream(session, downstream)
+    local read_pipeline = false
+    session.req_id_seq = session.req_id_seq + 1
+    local ctx = sdk.get_req_ctx(session, session.req_id_seq)
+    session._downstream_ctx = ctx
+    while true do
+        local ok, err, pipelined = read_req(downstream)
+        if not ok then
+            if err ~= "timeout" and err ~= "closed" then
+                core.log.error("failed to read request: ", err)
+            end
+
+            if read_pipeline and err == "timeout" then
+                break
+            end
+
+            return DECLINED
+        end
+
+        if not pipelined then
+            break
+        end
+
+        if not read_pipeline then
+            read_pipeline = true
+            -- set minimal read timeout to read pipelined data
+            downstream:settimeouts(0, 0, 1)
+        end
+    end
+
+    if read_pipeline then
+        -- set timeout back
+        downstream:settimeouts(0, 0, 0)
+    end
+
+    return OK, ctx
+end
+
+function _M.connect_upstream(session, ctx)
+    local conf = session.upstream_conf
+    local nodes = conf.nodes
+    if #nodes == 0 then
+        core.log.error("failed to connect: no nodes")
+        return DECLINED
+    end
+
+    local node = nodes[math_random(#nodes)]
+    local sk = sdk.connect_upstream(node, conf)
+    if not sk then
+        return DECLINED
+    end
+    core.log.warn("dubbo_connect_upstream end")

Review Comment:
   ```suggestion
   
       core.log.debug("dubbo_connect_upstream end")
   
   ```



##########
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)
+    local header_info = parse_dubbo_header(header_str)
+
+    local is_valid_magic_number = header_info.magic_number == "dabb"
+    if not is_valid_magic_number then
+        return true, nil, false
+    end
+
+    local body_data, err = sk:read(header_info.data_length)
+    if not body_data then
+        core.log.warn("failed to read Dubbo request body: ", err)
+        return nil, err, false
+    end
+    ngx.ctx.dubbo_serialization_id = bit.band(header_info.message_flag, 0x1F)

Review Comment:
   ```suggestion
   
       ngx.ctx.dubbo_serialization_id = bit.band(header_info.message_flag, 0x1F)
   
   ```



##########
t/xrpc/dubbo.t:
##########
@@ -0,0 +1,125 @@
+#
+# 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.
+#
+use t::APISIX;
+
+my $nginx_binary = $ENV{'TEST_NGINX_BINARY'} || 'nginx';
+my $version = eval { `$nginx_binary -V 2>&1` };
+
+if ($version !~ m/\/apisix-nginx-module/) {
+    plan(skip_all => "apisix-nginx-module not installed");
+} else {
+    plan('no_plan');
+}
+log_level("warn");
+$ENV{TEST_NGINX_DUBBO_PORT} ||= 1985;
+
+add_block_preprocessor(sub {
+    my ($block) = @_;
+
+    if (!$block->extra_yaml_config) {
+        my $extra_yaml_config = <<_EOC_;
+xrpc:
+  protocols:
+    - name: dubbo
+_EOC_
+        $block->set_value("extra_yaml_config", $extra_yaml_config);
+    }
+
+    my $config = $block->config // <<_EOC_;
+    location /t {
+        content_by_lua_block {
+            ngx.req.read_body()
+            local sock = ngx.socket.tcp()
+            sock:settimeout(1000)
+            local ok, err = sock:connect("127.0.0.1", 20880)
+            if not ok then
+                ngx.log(ngx.ERR, "failed to connect: ", err)
+                return ngx.exit(503)
+            end
+
+            local bytes, err = sock:send(ngx.req.get_body_data())
+            if not bytes then
+                ngx.log(ngx.ERR, "send stream request error: ", err)
+                return ngx.exit(503)
+            end
+            while true do
+                local data, err = sock:receiveany(4096)
+                if not data then
+                    sock:close()
+                    break
+                end
+                ngx.print(data)
+            end
+        }
+    }
+_EOC_
+
+    $block->set_value("config", $config);
+
+    if ((!defined $block->error_log) && (!defined $block->no_error_log)) {
+        $block->set_value("no_error_log", "[error]\nRPC is not finished");
+    }
+
+    if (!defined $block->request) {
+        $block->set_value("request", "GET /t");
+    }
+
+    $block;
+});
+
+worker_connections(1024);
+run_tests;
+
+__DATA__
+
+=== TEST 1: init
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin").test
+            local code, body = t('/apisix/admin/stream_routes/1',
+                ngx.HTTP_PUT,
+                {
+                    protocol = {
+                        name = "dubbo"
+                    },
+                    upstream = {
+                        nodes = {
+                            ["127.0.0.1:20880"] = 1
+                        },
+                        type = "roundrobin"
+                    }
+                }
+            )
+            if code >= 300 then
+                ngx.status = code
+            end
+            ngx.say(body)
+        }
+    }
+--- response_body
+passed
+--- log_level: warn
+
+
+=== TEST 2: sanity
+--- request eval
+"GET /t
+\xda\xbb\xc2\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\xef\x05\x32\x2e\x30\x2e\x32\x30\x24\x6f\x72\x67\x2e\x61\x70\x61\x63\x68\x65\x2e\x64\x75\x62\x62\x6f\x2e\x62\x61\x63\x6b\x65\x6e\x64\x2e\x44\x65\x6d\x6f\x53\x65\x72\x76\x69\x63\x65\x05\x31\x2e\x30\x2e\x30\x05\x68\x65\x6c\x6c\x6f\x0f\x4c\x6a\x61\x76\x61\x2f\x75\x74\x69\x6c\x2f\x4d\x61\x70\x3b\x48\x04\x6e\x61\x6d\x65\x08\x7a\x68\x61\x6e\x67\x73\x61\x6e\x5a\x48\x04\x70\x61\x74\x68\x30\x24\x6f\x72\x67\x2e\x61\x70\x61\x63\x68\x65\x2e\x64\x75\x62\x62\x6f\x2e\x62\x61\x63\x6b\x65\x6e\x64\x2e\x44\x65\x6d\x6f\x53\x65\x72\x76\x69\x63\x65\x12\x72\x65\x6d\x6f\x74\x65\x2e\x61\x70\x70\x6c\x69\x63\x61\x74\x69\x6f\x6e\x0b\x73\x70\x2d\x63\x6f\x6e\x73\x75\x6d\x65\x20\x09\x69\x6e\x74\x65\x72\x66\x61\x63\x65\x30\x24\x6f\x72\x67\x2e\x61\x70\x61\x63\x68\x65\x2e\x64\x75\x62\x62\x6f\x2e\x62\x61\x63\x6b\x65\x6e\x64\x2e\x44\x65\x6d\x6f\x53\x65\x72\x76\x69\x63\x65\x07\x76\x65\x72\x73\x69\x6f\x6e\x05\x31\x2e\x30\x2e\x30\x07\x74\x69\x6d\x65\x6f\x75\x74\x04\
 x31\x30\x30\x30\x5a"

Review Comment:
   Better to give a human readable comment for the request and response.
   



##########
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)
+    local header_info = parse_dubbo_header(header_str)
+
+    local is_valid_magic_number = header_info.magic_number == "dabb"
+    if not is_valid_magic_number then
+        return true, nil, false
+    end
+
+    local body_data, err = sk:read(header_info.data_length)
+    if not body_data then
+        core.log.warn("failed to read Dubbo request body: ", err)
+        return nil, err, false
+    end
+    ngx.ctx.dubbo_serialization_id = bit.band(header_info.message_flag, 0x1F)
+    if is_req then
+        ngx.ctx.dubbo_req_body_data = body_data
+    else
+        ngx.ctx.dubbo_rsp_body_data = body_data
+    end
+
+
+    return true, nil, false
+end
+
+local function read_req(sk)
+    return read_data(sk, true)
+end
+
+local function read_reply(sk)
+    return read_data(sk, false)
+end
+
+local function handle_reply(session, sk)
+    local ok, err = read_reply(sk)
+    if not ok then
+        return nil, err
+    end
+
+    local ctx = sdk.get_req_ctx(session, 10)
+
+    return ctx
+end
+
+function _M.from_downstream(session, downstream)
+    local read_pipeline = false
+    session.req_id_seq = session.req_id_seq + 1
+    local ctx = sdk.get_req_ctx(session, session.req_id_seq)
+    session._downstream_ctx = ctx
+    while true do
+        local ok, err, pipelined = read_req(downstream)
+        if not ok then
+            if err ~= "timeout" and err ~= "closed" then
+                core.log.error("failed to read request: ", err)
+            end
+
+            if read_pipeline and err == "timeout" then
+                break
+            end
+
+            return DECLINED
+        end
+
+        if not pipelined then
+            break
+        end
+
+        if not read_pipeline then
+            read_pipeline = true
+            -- set minimal read timeout to read pipelined data
+            downstream:settimeouts(0, 0, 1)
+        end
+    end
+
+    if read_pipeline then
+        -- set timeout back
+        downstream:settimeouts(0, 0, 0)
+    end
+
+    return OK, ctx
+end
+
+function _M.connect_upstream(session, ctx)
+    local conf = session.upstream_conf
+    local nodes = conf.nodes
+    if #nodes == 0 then
+        core.log.error("failed to connect: no nodes")
+        return DECLINED
+    end
+
+    local node = nodes[math_random(#nodes)]
+    local sk = sdk.connect_upstream(node, conf)
+    if not sk then
+        return DECLINED
+    end
+    core.log.warn("dubbo_connect_upstream end")
+    return OK, sk
+end
+
+function _M.disconnect_upstream(session, upstream)
+    sdk.disconnect_upstream(upstream, session.upstream_conf)
+end
+
+function _M.to_upstream(session, ctx, downstream, upstream)
+    local ok, err = upstream:move(downstream)
+    if not ok then
+        core.log.error("failed to send to upstream: ", err)
+        return DECLINED
+    end
+
+    return OK
+end
+
+function _M.from_upstream(session, downstream, upstream)
+    local ctx = handle_reply(session, upstream)
+
+    local ok, err = downstream:move(upstream)
+    if not ok then
+        core.log.error("failed to handle upstream: ", err)
+        return DECLINED
+    end
+
+    return DONE, ctx
+end
+
+function _M.log(session, ctx)
+    local metrics = sdk.get_metrics(session, protocol_name)
+    if metrics then
+        session.cmd_labels[2] = ctx.cmd

Review Comment:
   where is the `ctx.cmd` from?



##########
t/xrpc/dubbo.t:
##########
@@ -0,0 +1,125 @@
+#
+# 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.
+#
+use t::APISIX;
+
+my $nginx_binary = $ENV{'TEST_NGINX_BINARY'} || 'nginx';
+my $version = eval { `$nginx_binary -V 2>&1` };
+
+if ($version !~ m/\/apisix-nginx-module/) {
+    plan(skip_all => "apisix-nginx-module not installed");
+} else {
+    plan('no_plan');
+}
+log_level("warn");
+$ENV{TEST_NGINX_DUBBO_PORT} ||= 1985;
+
+add_block_preprocessor(sub {
+    my ($block) = @_;
+
+    if (!$block->extra_yaml_config) {
+        my $extra_yaml_config = <<_EOC_;
+xrpc:
+  protocols:
+    - name: dubbo
+_EOC_
+        $block->set_value("extra_yaml_config", $extra_yaml_config);
+    }
+
+    my $config = $block->config // <<_EOC_;
+    location /t {
+        content_by_lua_block {
+            ngx.req.read_body()
+            local sock = ngx.socket.tcp()
+            sock:settimeout(1000)
+            local ok, err = sock:connect("127.0.0.1", 20880)
+            if not ok then
+                ngx.log(ngx.ERR, "failed to connect: ", err)
+                return ngx.exit(503)
+            end
+
+            local bytes, err = sock:send(ngx.req.get_body_data())
+            if not bytes then
+                ngx.log(ngx.ERR, "send stream request error: ", err)
+                return ngx.exit(503)
+            end
+            while true do
+                local data, err = sock:receiveany(4096)
+                if not data then
+                    sock:close()
+                    break
+                end
+                ngx.print(data)
+            end
+        }
+    }
+_EOC_
+
+    $block->set_value("config", $config);
+
+    if ((!defined $block->error_log) && (!defined $block->no_error_log)) {
+        $block->set_value("no_error_log", "[error]\nRPC is not finished");
+    }
+
+    if (!defined $block->request) {
+        $block->set_value("request", "GET /t");
+    }
+
+    $block;
+});
+
+worker_connections(1024);
+run_tests;
+
+__DATA__
+
+=== TEST 1: init
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin").test
+            local code, body = t('/apisix/admin/stream_routes/1',
+                ngx.HTTP_PUT,
+                {
+                    protocol = {
+                        name = "dubbo"
+                    },
+                    upstream = {
+                        nodes = {
+                            ["127.0.0.1:20880"] = 1
+                        },
+                        type = "roundrobin"
+                    }
+                }
+            )
+            if code >= 300 then
+                ngx.status = code
+            end
+            ngx.say(body)
+        }
+    }
+--- response_body
+passed
+--- log_level: warn
+
+
+=== TEST 2: sanity
+--- request eval
+"GET /t
+\xda\xbb\xc2\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\xef\x05\x32\x2e\x30\x2e\x32\x30\x24\x6f\x72\x67\x2e\x61\x70\x61\x63\x68\x65\x2e\x64\x75\x62\x62\x6f\x2e\x62\x61\x63\x6b\x65\x6e\x64\x2e\x44\x65\x6d\x6f\x53\x65\x72\x76\x69\x63\x65\x05\x31\x2e\x30\x2e\x30\x05\x68\x65\x6c\x6c\x6f\x0f\x4c\x6a\x61\x76\x61\x2f\x75\x74\x69\x6c\x2f\x4d\x61\x70\x3b\x48\x04\x6e\x61\x6d\x65\x08\x7a\x68\x61\x6e\x67\x73\x61\x6e\x5a\x48\x04\x70\x61\x74\x68\x30\x24\x6f\x72\x67\x2e\x61\x70\x61\x63\x68\x65\x2e\x64\x75\x62\x62\x6f\x2e\x62\x61\x63\x6b\x65\x6e\x64\x2e\x44\x65\x6d\x6f\x53\x65\x72\x76\x69\x63\x65\x12\x72\x65\x6d\x6f\x74\x65\x2e\x61\x70\x70\x6c\x69\x63\x61\x74\x69\x6f\x6e\x0b\x73\x70\x2d\x63\x6f\x6e\x73\x75\x6d\x65\x20\x09\x69\x6e\x74\x65\x72\x66\x61\x63\x65\x30\x24\x6f\x72\x67\x2e\x61\x70\x61\x63\x68\x65\x2e\x64\x75\x62\x62\x6f\x2e\x62\x61\x63\x6b\x65\x6e\x64\x2e\x44\x65\x6d\x6f\x53\x65\x72\x76\x69\x63\x65\x07\x76\x65\x72\x73\x69\x6f\x6e\x05\x31\x2e\x30\x2e\x30\x07\x74\x69\x6d\x65\x6f\x75\x74\x04\
 x31\x30\x30\x30\x5a"
+--- response_body eval
+"\xda\xbb\x02\x14\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x43\x09\x44\x80\x46\x20\x64\x75\x62\x62\x6f\x0e\x64\x75\x62\x62\x6f\x20\x73\x75\x63\x63\x65\x73\x73\x0a\x73\x74\x61\x74\x75\x73\x03\x32\x30\x30\x5a\x48\x05\x64\x75\x62\x62\x6f\x05\x32\x2e\x30\x2e\x32\x5a"
+--- stream_conf_enable

Review Comment:
   Need more test cases. For example, whether it is an event, whether it is 2 
way, different Status responses, etc.
   



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