github.com/google/fleetspeak@v0.1.15-0.20240426164851-4f31f62c1aea/fleetspeak/src/server/sqlite/filestore.go (about)

     1  // Copyright 2017 Google Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     https://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package sqlite
    16  
    17  import (
    18  	"bytes"
    19  	"context"
    20  	"database/sql"
    21  	"io"
    22  	"time"
    23  
    24  	"github.com/google/fleetspeak/fleetspeak/src/server/db"
    25  )
    26  
    27  func (d *Datastore) StoreFile(ctx context.Context, service, name string, data io.Reader) error {
    28  	b, err := io.ReadAll(data)
    29  	if err != nil {
    30  		return err
    31  	}
    32  	d.l.Lock()
    33  	defer d.l.Unlock()
    34  	return d.runInTx(func(tx *sql.Tx) error {
    35  		_, err := tx.ExecContext(ctx, "INSERT OR REPLACE INTO files (service, name, modified_time_nanos, data) VALUES(?, ?, ?, ?)",
    36  			service, name, db.Now().UnixNano(), b)
    37  		return err
    38  	})
    39  }
    40  
    41  func (d *Datastore) StatFile(ctx context.Context, service, name string) (time.Time, error) {
    42  	d.l.Lock()
    43  	defer d.l.Unlock()
    44  
    45  	var ts int64
    46  
    47  	err := d.runInTx(func(tx *sql.Tx) error {
    48  		row := tx.QueryRowContext(ctx, "SELECT modified_time_nanos FROM files WHERE service = ? AND name = ?", service, name)
    49  		return row.Scan(&ts)
    50  	})
    51  
    52  	return time.Unix(0, ts).UTC(), err
    53  }
    54  
    55  func (d *Datastore) ReadFile(ctx context.Context, service, name string) (data db.ReadSeekerCloser, modtime time.Time, err error) {
    56  	d.l.Lock()
    57  	defer d.l.Unlock()
    58  
    59  	var b []byte
    60  	var ts int64
    61  
    62  	err = d.runInTx(func(tx *sql.Tx) error {
    63  		row := tx.QueryRowContext(ctx, "SELECT modified_time_nanos, data FROM files WHERE service = ? AND name = ?", service, name)
    64  		if err := row.Scan(&ts, &b); err != nil {
    65  			b = nil
    66  			return err
    67  		}
    68  		return nil
    69  	})
    70  
    71  	if err != nil {
    72  		return nil, time.Time{}, err
    73  	}
    74  	if b == nil {
    75  		b = []byte{}
    76  	}
    77  	return db.NOOPCloser{ReadSeeker: bytes.NewReader(b)}, time.Unix(0, ts).UTC(), nil
    78  }