d19f6d4b6d
full diff: https://github.com/containerd/ttrpc/compare/v1.2.2..v1.2.3 Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package ttrpc
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import (
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"context"
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"errors"
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)
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type serverConfig struct {
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handshaker Handshaker
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interceptor UnaryServerInterceptor
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}
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// ServerOpt for configuring a ttrpc server
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type ServerOpt func(*serverConfig) error
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// WithServerHandshaker can be passed to NewServer to ensure that the
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// handshaker is called before every connection attempt.
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//
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// Only one handshaker is allowed per server.
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func WithServerHandshaker(handshaker Handshaker) ServerOpt {
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return func(c *serverConfig) error {
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if c.handshaker != nil {
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return errors.New("only one handshaker allowed per server")
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}
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c.handshaker = handshaker
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return nil
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}
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}
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// WithUnaryServerInterceptor sets the provided interceptor on the server
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func WithUnaryServerInterceptor(i UnaryServerInterceptor) ServerOpt {
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return func(c *serverConfig) error {
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if c.interceptor != nil {
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return errors.New("only one unchained interceptor allowed per server")
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}
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c.interceptor = i
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return nil
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}
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}
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// WithChainUnaryServerInterceptor sets the provided chain of server interceptors
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func WithChainUnaryServerInterceptor(interceptors ...UnaryServerInterceptor) ServerOpt {
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return func(c *serverConfig) error {
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if len(interceptors) == 0 {
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return nil
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}
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if c.interceptor != nil {
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interceptors = append([]UnaryServerInterceptor{c.interceptor}, interceptors...)
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}
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c.interceptor = func(
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ctx context.Context,
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unmarshal Unmarshaler,
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info *UnaryServerInfo,
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method Method) (interface{}, error) {
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return interceptors[0](ctx, unmarshal, info,
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chainUnaryServerInterceptors(info, method, interceptors[1:]))
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}
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return nil
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}
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}
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func chainUnaryServerInterceptors(info *UnaryServerInfo, method Method, interceptors []UnaryServerInterceptor) Method {
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if len(interceptors) == 0 {
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return method
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}
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return func(ctx context.Context, unmarshal func(interface{}) error) (interface{}, error) {
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return interceptors[0](ctx, unmarshal, info,
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chainUnaryServerInterceptors(info, method, interceptors[1:]))
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}
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}
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