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42 lines
1.3 KiB
42 lines
1.3 KiB
// Copyright © 2023 OpenIM. All rights reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package mw
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import (
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"context"
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"google.golang.org/grpc"
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)
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func InterceptChain(intercepts ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor {
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l := len(intercepts)
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return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
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chain := func(currentInter grpc.UnaryServerInterceptor, currentHandler grpc.UnaryHandler) grpc.UnaryHandler {
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return func(currentCtx context.Context, currentReq interface{}) (interface{}, error) {
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return currentInter(
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currentCtx,
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currentReq,
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info,
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currentHandler)
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}
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}
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chainHandler := handler
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for i := l - 1; i >= 0; i-- {
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chainHandler = chain(intercepts[i], chainHandler)
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}
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return chainHandler(ctx, req)
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}
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}
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