49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
// Copyright 2017 David Ackroyd. All Rights Reserved.
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// See LICENSE for licensing terms.
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package grpc_recovery
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import (
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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)
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// RecoveryHandlerFunc is a function that recovers from the panic `p` by returning an `error`.
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type RecoveryHandlerFunc func(p interface{}) (err error)
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// UnaryServerInterceptor returns a new unary server interceptor for panic recovery.
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func UnaryServerInterceptor(opts ...Option) grpc.UnaryServerInterceptor {
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o := evaluateOptions(opts)
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return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (_ interface{}, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = recoverFrom(r, o.recoveryHandlerFunc)
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}
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}()
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return handler(ctx, req)
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}
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}
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// StreamServerInterceptor returns a new streaming server interceptor for panic recovery.
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func StreamServerInterceptor(opts ...Option) grpc.StreamServerInterceptor {
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o := evaluateOptions(opts)
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return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) (err error) {
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defer func() {
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if r := recover(); r != nil {
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err = recoverFrom(r, o.recoveryHandlerFunc)
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}
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}()
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return handler(srv, stream)
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}
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}
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func recoverFrom(p interface{}, r RecoveryHandlerFunc) error {
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if r == nil {
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return grpc.Errorf(codes.Internal, "%s", p)
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}
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return r(p)
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}
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