1 /* 2 Copyright The containerd Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package ttrpc 18 19 import "errors" 20 21 type serverConfig struct { 22 handshaker Handshaker 23 interceptor UnaryServerInterceptor 24 } 25 26 // ServerOpt for configuring a ttrpc server 27 type ServerOpt func(*serverConfig) error 28 29 // WithServerHandshaker can be passed to NewServer to ensure that the 30 // handshaker is called before every connection attempt. 31 // 32 // Only one handshaker is allowed per server. 33 func WithServerHandshaker(handshaker Handshaker) ServerOpt { 34 return func(c *serverConfig) error { 35 if c.handshaker != nil { 36 return errors.New("only one handshaker allowed per server") 37 } 38 c.handshaker = handshaker 39 return nil 40 } 41 } 42 43 // WithUnaryServerInterceptor sets the provided interceptor on the server 44 func WithUnaryServerInterceptor(i UnaryServerInterceptor) ServerOpt { 45 return func(c *serverConfig) error { 46 if c.interceptor != nil { 47 return errors.New("only one interceptor allowed per server") 48 } 49 c.interceptor = i 50 return nil 51 } 52 } 53