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feat(prob): support protocol probing
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Copyright 2023 CloudWeGo Authors | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| package dubbo | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "net" | ||
|
|
||
| "github.com/cloudwego/kitex/pkg/endpoint" | ||
| "github.com/cloudwego/kitex/pkg/remote" | ||
| "github.com/cloudwego/kitex/pkg/remote/trans/detection" | ||
| "github.com/cloudwego/kitex/pkg/remote/trans/netpoll" | ||
| "github.com/cloudwego/kitex/pkg/remote/trans/nphttp2" | ||
| cnetpoll "github.com/cloudwego/netpoll" | ||
|
|
||
| "github.com/kitex-contrib/codec-dubbo/pkg/dubbo_spec" | ||
| ) | ||
|
|
||
| // NewSvrTransHandlerFactory the factory expand the implementation of DetectableServerTransHandler for | ||
| // hessian protocol to support the dubbo protocol probing. | ||
| func NewSvrTransHandlerFactory(opts ...Option) remote.ServerTransHandlerFactory { | ||
| return detection.NewSvrTransHandlerFactory(netpoll.NewSvrTransHandlerFactory(), | ||
| nphttp2.NewSvrTransHandlerFactory(), | ||
| &svrTransHandlerFactory{ | ||
| codec: NewDubboCodec(opts...), | ||
| ServerTransHandlerFactory: netpoll.NewSvrTransHandlerFactory(), | ||
| }) | ||
| } | ||
|
|
||
| type svrTransHandlerFactory struct { | ||
| remote.ServerTransHandlerFactory | ||
| // the codec should be set with dubbo codec to keep consistent | ||
| // with the function ProtocolMatch. | ||
| codec remote.Codec | ||
| } | ||
|
|
||
| func (f *svrTransHandlerFactory) NewTransHandler(opt *remote.ServerOption) (remote.ServerTransHandler, error) { | ||
| sourceCodec := opt.Codec | ||
| opt.Codec = f.codec | ||
| defer func() { | ||
| // just set the handler with dubbo codec and restore the source codec | ||
| opt.Codec = sourceCodec | ||
| }() | ||
|
|
||
| handler, err := f.ServerTransHandlerFactory.NewTransHandler(opt) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &svrTransHandler{ | ||
| ServerTransHandler: handler, | ||
| }, nil | ||
| } | ||
|
|
||
| type svrTransHandler struct { | ||
| remote.ServerTransHandler | ||
| } | ||
|
|
||
| func (svr *svrTransHandler) ProtocolMatch(ctx context.Context, conn net.Conn) (err error) { | ||
| // Check the validity of client preface. | ||
| npReader := conn.(interface{ Reader() cnetpoll.Reader }).Reader() | ||
| // read at most avoid block | ||
| header, err := npReader.Peek(dubbo_spec.HEADER_SIZE) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if header[0] == dubbo_spec.MAGIC_HIGH && header[1] == dubbo_spec.MAGIC_LOW { | ||
| return nil | ||
| } | ||
| return errors.New("error protocol not match hessian") | ||
| } | ||
|
|
||
| func (svr *svrTransHandler) GracefulShutdown(ctx context.Context) error { | ||
| if g, ok := svr.ServerTransHandler.(remote.GracefulShutdown); ok { | ||
| g.GracefulShutdown(ctx) | ||
| } | ||
| return nil | ||
| } | ||
| func (svr *svrTransHandler) SetInvokeHandleFunc(inkHdlFunc endpoint.Endpoint) { | ||
| if s, ok := svr.ServerTransHandler.(remote.InvokeHandleFuncSetter); ok { | ||
| s.SetInvokeHandleFunc(inkHdlFunc) | ||
| } | ||
| } |