open-consul/agent/grpc-middleware/recovery.go

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package middleware
import (
recovery "github.com/grpc-ecosystem/go-grpc-middleware/recovery"
"github.com/hashicorp/go-hclog"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// PanicHandlerMiddlewareOpts returns the []recovery.Option containing
// recovery handler function.
func PanicHandlerMiddlewareOpts(logger Logger) []recovery.Option {
return []recovery.Option{
recovery.WithRecoveryHandler(NewPanicHandler(logger)),
}
}
// NewPanicHandler returns a recovery.RecoveryHandlerFunc closure function
// to handle panic in GRPC server's handlers.
func NewPanicHandler(logger Logger) recovery.RecoveryHandlerFunc {
return func(p interface{}) (err error) {
// Log the panic and the stack trace of the Goroutine that caused the panic.
stacktrace := hclog.Stacktrace()
logger.Error("panic serving grpc request",
"panic", p,
"stack", stacktrace,
)
return status.Errorf(codes.Internal, "grpc: panic serving request")
}
}
type Logger interface {
Error(string, ...interface{})
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Warn(string, ...interface{})
}