| -- |
| -- 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 require = require |
| local core = require("apisix.core") |
| local pairs = pairs |
| local str_format = string.format |
| local bit = require("bit") |
| local rshift = bit.rshift |
| local band = bit.band |
| local char = string.char |
| local tostring = tostring |
| local ngx = ngx |
| local type = type |
| local plugin_name = "http-dubbo" |
| |
| |
| local schema = { |
| type = "object", |
| properties = { |
| service_name = { |
| type = "string", |
| minLength = 1, |
| }, |
| service_version = { |
| type = "string", |
| pattern = [[^\d+\.\d+\.\d+]], |
| default ="0.0.0" |
| }, |
| method = { |
| type = "string", |
| minLength = 1, |
| }, |
| params_type_desc = { |
| type = "string", |
| default = "" |
| }, |
| serialization_header_key = { |
| type = "string" |
| }, |
| serialized = { |
| type = "boolean", |
| default = false |
| }, |
| connect_timeout={ |
| type = "number", |
| default = 6000 |
| }, |
| read_timeout={ |
| type = "number", |
| default = 6000 |
| }, |
| send_timeout={ |
| type = "number", |
| default = 6000 |
| } |
| }, |
| required = { "service_name", "method" }, |
| } |
| |
| local _M = { |
| version = 0.1, |
| priority = 504, |
| name = plugin_name, |
| schema = schema, |
| } |
| |
| function _M.check_schema(conf) |
| return core.schema.check(schema, conf) |
| end |
| |
| |
| local function str_int32(int) |
| return char(band(rshift(int, 24), 0xff), |
| band(rshift(int, 16), 0xff), |
| band(rshift(int, 8), 0xff), |
| band(int, 0xff)) |
| end |
| |
| |
| local function parse_dubbo_header(header) |
| for i = 1, 16 do |
| local currentByte = header:byte(i) |
| if not currentByte then |
| return nil |
| end |
| end |
| |
| local magic_number = str_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 byte13Val = header:byte(13) * 256 * 256 * 256 |
| local byte14Val = header:byte(14) * 256 * 256 |
| local data_length = byte13Val + byte14Val + 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 string_to_json_string(str) |
| local result = "\"" |
| for i = 1, #str do |
| local byte = core.string.sub(str, i, i) |
| if byte == "\\" then |
| result = result .. "\\\\" |
| elseif byte == "\n" then |
| result = result .. "\\n" |
| elseif byte == "\t" then |
| result = result .. "\\t" |
| elseif byte == "\r" then |
| result = result .. "\\r" |
| elseif byte == "\b" then |
| result = result .. "\\b" |
| elseif byte == "\f" then |
| result = result .. "\\f" |
| elseif byte == "\"" then |
| result = result .. "\\\"" |
| else |
| result = result .. byte |
| end |
| end |
| return result .. "\"" |
| end |
| |
| |
| local function get_dubbo_request(conf, ctx) |
| -- use dubbo and fastjson |
| local first_byte4 = "\xda\xbb\xc6\x00" |
| |
| local requestId = "\x00\x00\x00\x00\x00\x00\x00\x01" |
| local version = "\"2.0.2\"\n" |
| local service = "\"" .. conf.service_name .. "\"" .. "\n" |
| |
| local service_version = "\"" .. conf.service_version .. "\"" .. "\n" |
| local method_name = "\"" .. conf.method .. "\"" .. "\n" |
| |
| local params_desc = "\"" .. conf.params_type_desc .. "\"" .. "\n" |
| local params = "" |
| local serialized = conf.serialized |
| if conf.serialization_header_key then |
| local serialization_header = core.request.header(ctx, conf.serialization_header_key) |
| serialized = serialization_header == "true" |
| end |
| if serialized then |
| params = core.request.get_body() |
| if params then |
| local end_of_params = core.string.sub(params, -1) |
| if end_of_params ~= "\n" then |
| params = params .. "\n" |
| end |
| end |
| else |
| local body_data = core.request.get_body() |
| if body_data then |
| local lua_object = core.json.decode(body_data); |
| for _, v in pairs(lua_object) do |
| local pt = type(v) |
| if pt == "nil" then |
| params = params .. "null" .. "\n" |
| elseif pt == "string" then |
| params = params .. string_to_json_string(v) .. "\n" |
| elseif pt == "number" then |
| params = params .. tostring(v) .. "\n" |
| else |
| params = params .. core.json.encode(v) .. "\n" |
| end |
| end |
| end |
| |
| end |
| local attachments = "{}\n" |
| if params == nil then |
| params = "" |
| end |
| local payload = #version + #service + #service_version |
| + #method_name + #params_desc + #params + #attachments |
| return { |
| first_byte4, |
| requestId, |
| str_int32(payload), |
| version, |
| service, |
| service_version, |
| method_name, |
| params_desc, |
| params, |
| attachments |
| } |
| end |
| |
| |
| function _M.before_proxy(conf, ctx) |
| local sock = ngx.socket.tcp() |
| |
| sock:settimeouts(conf.connect_timeout, conf.send_timeout, conf.read_timeout) |
| local ok, err = sock:connect(ctx.picked_server.host, ctx.picked_server.port) |
| if not ok then |
| sock:close() |
| core.log.error("failed to connect to upstream ", err) |
| return 502 |
| end |
| local request = get_dubbo_request(conf, ctx) |
| local bytes, _ = sock:send(request) |
| if bytes > 0 then |
| local header, _ = sock:receiveany(16); |
| if header then |
| local header_info = parse_dubbo_header(header) |
| if header_info and header_info.status == 20 then |
| local readline = sock:receiveuntil("\n") |
| local body_status, _, _ = readline() |
| if body_status then |
| local response_status = core.string.sub(body_status, 1, 1) |
| if response_status == "2" or response_status == "5" then |
| sock:close() |
| return 200 |
| elseif response_status == "1" or response_status == "4" then |
| local body, _, _ = readline() |
| sock:close() |
| return 200, body |
| end |
| end |
| end |
| end |
| end |
| sock:close() |
| return 500 |
| |
| end |
| |
| return _M |