Aleksei Sokol
094112af97
Changes: - forbid to overwrite secrets of other users - add some logs of success - add validation on code (length 50) - use same limiter for POST requests
65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
package db
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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)
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var ErrNotFound = errors.New("secret not found")
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var ErrForbidden = errors.New("code owned by another user")
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type SecretsRepository struct {
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db *sql.DB
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}
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func NewSecretsRepository(db *sql.DB) *SecretsRepository {
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return &SecretsRepository{db: db}
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}
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func (r *SecretsRepository) Get(ctx context.Context, code string) (string, error) {
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var value string
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err := r.db.QueryRowContext(ctx, "SELECT value FROM secrets WHERE code = ?", code).Scan(&value)
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if errors.Is(err, sql.ErrNoRows) {
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return "", ErrNotFound
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}
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if err != nil {
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return "", fmt.Errorf("could not get secret: %w", err)
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}
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return value, nil
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}
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// Set stores value under code, owned by user. If code already exists and is
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// owned by a different user, it returns ErrForbidden and leaves the stored
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// value untouched.
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func (r *SecretsRepository) Set(ctx context.Context, code, value, user string) error {
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tx, err := r.db.BeginTx(ctx, nil)
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if err != nil {
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return fmt.Errorf("could not begin transaction: %w", err)
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}
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defer func() { _ = tx.Rollback() }()
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var owner string
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err = tx.QueryRowContext(ctx, "SELECT user FROM secrets WHERE code = ?", code).Scan(&owner)
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if err != nil && !errors.Is(err, sql.ErrNoRows) {
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return fmt.Errorf("could not check secret owner: %w", err)
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}
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if !errors.Is(err, sql.ErrNoRows) && owner != user {
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return ErrForbidden
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}
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if _, err := tx.ExecContext(ctx, `
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INSERT INTO secrets (code, value, user, created_at, updated_at)
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VALUES (?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
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ON CONFLICT(code) DO UPDATE SET value = excluded.value, updated_at = CURRENT_TIMESTAMP
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`, code, value, user); err != nil {
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return fmt.Errorf("could not set secret: %w", err)
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}
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if err := tx.Commit(); err != nil {
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return fmt.Errorf("could not commit transaction: %w", err)
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}
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return nil
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}
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