certspotter/monitor/statefile.go

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// Copyright (C) 2023 Opsmate, Inc.
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License, v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
// This software is distributed WITHOUT A WARRANTY OF ANY KIND.
// See the Mozilla Public License for details.
package monitor
import (
"encoding/json"
"fmt"
"os"
"software.sslmate.com/src/certspotter/ct"
"software.sslmate.com/src/certspotter/merkletree"
"time"
)
type stateFile struct {
DownloadPosition *merkletree.CollapsedTree `json:"download_position"`
VerifiedPosition *merkletree.CollapsedTree `json:"verified_position"`
VerifiedSTH *ct.SignedTreeHead `json:"verified_sth"`
LastSuccess time.Time `json:"last_success"`
}
func loadStateFile(filePath string) (*stateFile, error) {
fileBytes, err := os.ReadFile(filePath)
if err != nil {
return nil, err
}
file := new(stateFile)
if err := json.Unmarshal(fileBytes, file); err != nil {
return nil, fmt.Errorf("error parsing %s: %w", filePath, err)
}
return file, nil
}
func (file *stateFile) store(filePath string) error {
fileBytes, err := json.Marshal(file)
if err != nil {
return err
}
fileBytes = append(fileBytes, '\n')
return writeFile(filePath, fileBytes, 0666)
}