mirror of
https://github.com/siderolabs/discovery-service.git
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619546696a
Fixes #5 Batch watch responses in a single batch so that client can quickly know that initial snapshot got delivered. Bump go.mod deps. Implement more limits. Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Package proto contains wrappers to inject vtprotobuf marshaling.
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package proto
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import (
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"fmt"
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"google.golang.org/grpc/encoding"
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"google.golang.org/grpc/encoding/proto"
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protov2 "google.golang.org/protobuf/proto" //nolint:gci
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)
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// Codec provides protobuf encoding.Codec.
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type Codec struct{}
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// Marshal implements encoding.Codec.
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func (Codec) Marshal(v interface{}) ([]byte, error) {
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// our types implement Message (with or without vtproto additions depending on build configuration)
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if m, ok := v.(Message); ok {
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return Marshal(m)
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}
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// no types implement protobuf API v1 only, so don't check for it
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return nil, fmt.Errorf("failed to marshal %T", v)
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}
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// Unmarshal implements encoding.Codec.
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func (Codec) Unmarshal(data []byte, v interface{}) error {
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// our types implement Message (with or without vtproto additions depending on build configuration)
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if m, ok := v.(Message); ok {
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return Unmarshal(data, m)
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}
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// no types implement protobuf API v1 only, so don't check for it
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return fmt.Errorf("failed to unmarshal %T", v)
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}
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// Name implements encoding.Codec.
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func (Codec) Name() string {
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return proto.Name // overrides google.golang.org/grpc/encoding/proto codec
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}
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// Message is the main interface for protobuf API v2 messages.
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type Message = protov2.Message
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// vtprotoMessage is the interface for vtproto additions.
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//
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// We use only a subset of that interface but include additional methods
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// to prevent accidental successful type assertion for unrelated types.
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type vtprotoMessage interface {
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MarshalVT() ([]byte, error)
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MarshalToVT([]byte) (int, error)
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MarshalToSizedBufferVT([]byte) (int, error)
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UnmarshalVT([]byte) error
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}
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// Marshal returns the wire-format encoding of m.
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func Marshal(m Message) ([]byte, error) {
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if vm, ok := m.(vtprotoMessage); ok {
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return vm.MarshalVT()
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}
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return protov2.Marshal(m)
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}
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// Unmarshal parses the wire-format message in b and places the result in m.
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// The provided message must be mutable (e.g., a non-nil pointer to a message).
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func Unmarshal(b []byte, m Message) error {
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if vm, ok := m.(vtprotoMessage); ok {
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return vm.UnmarshalVT(b)
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}
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return protov2.Unmarshal(b, m)
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}
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func init() {
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encoding.RegisterCodec(Codec{})
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}
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