github.com/google/fleetspeak@v0.1.15-0.20240426164851-4f31f62c1aea/fleetspeak/src/server/mysql/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 mysql
    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  	return d.runInTx(ctx, false, func(tx *sql.Tx) error {
    33  		_, err := tx.ExecContext(ctx, "REPLACE INTO files (service, name, modified_time_nanos, data) VALUES(?, ?, ?, ?)",
    34  			service, name, db.Now().UnixNano(), b)
    35  		return err
    36  	})
    37  }
    38  
    39  func (d *Datastore) StatFile(ctx context.Context, service, name string) (time.Time, error) {
    40  	var ts int64
    41  
    42  	err := d.runInTx(ctx, true, func(tx *sql.Tx) error {
    43  		row := tx.QueryRowContext(ctx, "SELECT modified_time_nanos FROM files WHERE service = ? AND name = ?", service, name)
    44  		return row.Scan(&ts)
    45  	})
    46  
    47  	return time.Unix(0, ts).UTC(), err
    48  }
    49  
    50  func (d *Datastore) ReadFile(ctx context.Context, service, name string) (data db.ReadSeekerCloser, modtime time.Time, err error) {
    51  	var b []byte
    52  	var ts int64
    53  
    54  	err = d.runInTx(ctx, true, func(tx *sql.Tx) error {
    55  		row := tx.QueryRowContext(ctx, "SELECT modified_time_nanos, data FROM files WHERE service = ? AND name = ?", service, name)
    56  		if err := row.Scan(&ts, &b); err != nil {
    57  			b = nil
    58  			return err
    59  		}
    60  		return nil
    61  	})
    62  
    63  	if err != nil {
    64  		return nil, time.Time{}, err
    65  	}
    66  	if b == nil {
    67  		b = []byte{}
    68  	}
    69  	return db.NOOPCloser{ReadSeeker: bytes.NewReader(b)}, time.Unix(0, ts).UTC(), nil
    70  }