2fbb4095b2
Missed one case of Unmarshal in the previous commit for V0 files (0f4e4969b7) In V1, unmarshalling was being attempted before the checksum was verified, so this commit moves those calls to the end of the V1 ReadOne function. Change-Id: Ic0b49f0bbc91fb61fb28af6003060994d0af22ed
128 lines
3.0 KiB
Go
128 lines
3.0 KiB
Go
// Copyright (C) 2020 Storj Labs, Inc.
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// See LICENSE for copying information.
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package ordersfile
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import (
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"encoding/binary"
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"errors"
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"io"
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"os"
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"storj.io/common/pb"
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)
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// fileV0 is a version 0 orders file.
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type fileV0 struct {
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f *os.File
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}
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// OpenWritableV0 opens for writing the unsent or archived orders file at a given path.
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func OpenWritableV0(path string) (Writable, error) {
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// create file if not exists or append
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f, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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return nil, Error.Wrap(err)
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}
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return &fileV0{
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f: f,
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}, nil
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}
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// OpenReadableV0 opens for reading the unsent or archived orders file at a given path.
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func OpenReadableV0(path string) (Readable, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, Error.Wrap(err)
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}
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return &fileV0{
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f: f,
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}, nil
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}
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// Append writes limit and order to the file as
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// [limitSize][limitBytes][orderSize][orderBytes].
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func (of *fileV0) Append(info *Info) error {
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toWrite := []byte{}
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limitSerialized, err := pb.Marshal(info.Limit)
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if err != nil {
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return Error.Wrap(err)
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}
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orderSerialized, err := pb.Marshal(info.Order)
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if err != nil {
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return Error.Wrap(err)
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}
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limitSizeBytes := [4]byte{}
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binary.LittleEndian.PutUint32(limitSizeBytes[:], uint32(len(limitSerialized)))
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orderSizeBytes := [4]byte{}
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binary.LittleEndian.PutUint32(orderSizeBytes[:], uint32(len(orderSerialized)))
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toWrite = append(toWrite, limitSizeBytes[:]...)
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toWrite = append(toWrite, limitSerialized...)
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toWrite = append(toWrite, orderSizeBytes[:]...)
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toWrite = append(toWrite, orderSerialized...)
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if _, err = of.f.Write(toWrite); err != nil {
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return Error.New("Couldn't write serialized order and limit: %w", err)
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}
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return nil
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}
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// ReadOne reads one entry from the file.
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func (of *fileV0) ReadOne() (info *Info, err error) {
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defer func() {
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if errors.Is(err, io.ErrUnexpectedEOF) {
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err = ErrEntryCorrupt.Wrap(err)
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}
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}()
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sizeBytes := [4]byte{}
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_, err = io.ReadFull(of.f, sizeBytes[:])
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if err != nil {
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return nil, Error.Wrap(err)
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}
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limitSize := binary.LittleEndian.Uint32(sizeBytes[:])
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limitSerialized := make([]byte, limitSize)
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_, err = io.ReadFull(of.f, limitSerialized)
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if err != nil {
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return nil, Error.Wrap(err)
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}
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limit := &pb.OrderLimit{}
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err = pb.Unmarshal(limitSerialized, limit)
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if err != nil {
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// if there is an error unmarshalling, the file must be corrupt
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return nil, ErrEntryCorrupt.Wrap(err)
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}
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_, err = io.ReadFull(of.f, sizeBytes[:])
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if err != nil {
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return nil, Error.Wrap(err)
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}
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orderSize := binary.LittleEndian.Uint32(sizeBytes[:])
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orderSerialized := make([]byte, orderSize)
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_, err = io.ReadFull(of.f, orderSerialized)
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if err != nil {
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return nil, Error.Wrap(err)
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}
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order := &pb.Order{}
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err = pb.Unmarshal(orderSerialized, order)
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if err != nil {
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// if there is an error unmarshalling, the file must be corrupt
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return nil, ErrEntryCorrupt.Wrap(err)
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}
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return &Info{
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Limit: limit,
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Order: order,
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}, nil
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}
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// Close closes the file.
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func (of *fileV0) Close() error {
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return of.f.Close()
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}
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