36 lines
809 B
Go
36 lines
809 B
Go
package middleware
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import (
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"context"
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"log"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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)
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// Interceptor 拦截器
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func Interceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
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// 进行认证
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log.Println("interceptor...")
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md, ok := metadata.FromIncomingContext(ctx)
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if !ok {
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return nil, grpc.Errorf(codes.Unauthenticated, "no token ")
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}
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// md 是一个 map[string][]string 类型的
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val, ok := md["token"]
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if !ok {
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if val == nil {
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return nil, grpc.Errorf(codes.Unauthenticated, "token is null")
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}
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}
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if val[0] != "hello" {
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return nil, grpc.Errorf(codes.Unauthenticated, "token invalide: token=%s", val[0])
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}
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// 继续处理请求
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return handler(ctx, req)
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}
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