72 lines
1.3 KiB
Go
72 lines
1.3 KiB
Go
package ports
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import (
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"database/sql"
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"time"
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_ "github.com/jackc/pgx/v4/stdlib"
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)
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const DBSchema = `
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CREATE TABLE IF NOT EXISTS port_attempts(
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id serial PRIMARY KEY,
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date timestamptz,
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remote_ip inet,
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port varchar(5)
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);`
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type PostgresStore struct {
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db *sql.DB
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}
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func NewPostgresStore(dsn string) (*PostgresStore, error) {
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db, err := sql.Open("pgx", dsn)
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if err != nil {
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return nil, err
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}
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s := &PostgresStore{db: db}
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return s, nil
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}
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func (s *PostgresStore) InitDB() error {
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_, err := s.db.Exec(DBSchema)
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return err
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}
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func (s *PostgresStore) Add(attempt *ConnectionAttempt) error {
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stmt := `INSERT INTO port_attempts(date, remote_ip, port)
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VALUES ($1, $2, $3)`
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tx, err := s.db.Begin()
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if err != nil {
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return err
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}
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defer tx.Rollback() // nolint: errcheck
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_, err = tx.Exec(stmt, time.Now(), attempt.From, attempt.Port)
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if err != nil {
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return err
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}
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return tx.Commit()
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}
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func (s *PostgresStore) List() ([]*ConnectionAttempt, error) {
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stmt := `SELECT remote_ip, port FROM port_attempts`
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rows, err := s.db.Query(stmt)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var attempts []*ConnectionAttempt
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for rows.Next() {
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var a ConnectionAttempt
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if err := rows.Scan(&a.From, &a.Port); err != nil {
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return nil, err
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}
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attempts = append(attempts, &a)
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}
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return attempts, nil
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}
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