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package connector |
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import ( |
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"crypto/tls" |
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"crypto/x509" |
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"database/sql" |
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"fmt" |
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"strings" |
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"github.com/cdleo/go-commons/logger" |
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"github.com/cdleo/go-commons/sqlcommons" |
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pgx "github.com/jackc/pgx/v4" |
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stdlib "github.com/jackc/pgx/v4/stdlib" |
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) |
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type pgSqlConn struct { |
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host string |
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port int |
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user string |
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password string |
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database string |
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sslMode string |
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TLSConfig *tls.Config |
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} |
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const postgresProxyName = "pgx-proxy" |
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func NewPostgreSqlConnector(host string, port int, user string, password string, database string) sqlcommons.SQLConnector { |
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return &pgSqlConn{ |
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host: host, |
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port: port, |
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user: user, |
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password: password, |
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database: database, |
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sslMode: "disable", |
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} |
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} |
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func (s *pgSqlConn) WithTLS(sslMode string, allowInsecure bool, serverName string, serverCertificate string, clientCertificate string, clientKey string) error { |
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config := &tls.Config{ |
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InsecureSkipVerify: allowInsecure, |
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ServerName: serverName, |
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} |
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if serverCertificate != "" { |
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caCertPool := x509.NewCertPool() |
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ok := caCertPool.AppendCertsFromPEM([]byte(serverCertificate)) |
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if !ok { |
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return fmt.Errorf("unable to append Certs from PEM") |
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} |
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config.RootCAs = caCertPool |
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} |
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if clientCertificate != "" && clientKey != "" { |
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keypair, err := tls.X509KeyPair([]byte(clientCertificate), []byte(clientKey)) |
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if err != nil { |
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return fmt.Errorf("unable to create keypair of client [%v]", err) |
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} |
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config.Certificates = []tls.Certificate{keypair} |
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} |
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s.TLSConfig = config |
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s.sslMode = sslMode |
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return nil |
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} |
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func (s *pgSqlConn) Open(logger logger.Logger, translator sqlcommons.SQLAdapter) (*sql.DB, error) { |
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registerProxy(postgresProxyName, logger, translator, stdlib.GetDefaultDriver()) |
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psqlConn := fmt.Sprintf("host=%v port=%v user=%v password=%v dbname=%v sslmode=%v", s.host, s.port, s.user, s.password, s.database, s.sslMode) |
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config, err := pgx.ParseConfig(psqlConn) |
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if err != nil { |
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return nil, err |
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} |
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config.TLSConfig = s.TLSConfig |
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dbURI := stdlib.RegisterConnConfig(config) |
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dbPool, err := sql.Open(postgresProxyName, dbURI) |
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if err != nil { |
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return nil, fmt.Errorf("sql.Open: %w", err) |
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} |
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return dbPool, nil |
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} |
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func (s *pgSqlConn) GetNextSequenceQuery(sequenceName string) string { |
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return fmt.Sprintf("SELECT nextval('%s')", strings.ToLower(sequenceName)) |
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} |
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cdleo /
go-sqldb
