mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-06 09:20:25 +08:00
140 lines
3.6 KiB
Go
140 lines
3.6 KiB
Go
package postgres
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import (
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"context"
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"database/sql"
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"database/sql/driver"
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"mayfly-go/pkg/utils/collx"
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"mayfly-go/pkg/utils/netx"
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"net"
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"strings"
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"time"
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pq "gitee.com/liuzongyang/libpq"
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)
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func init() {
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meta := new(Meta)
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dbi.Register(DbTypePostgres, meta)
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dbi.Register(DbTypeKingbaseEs, meta)
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dbi.Register(DbTypeVastbase, meta)
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gauss := &Meta{
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Param: "dbtype=gauss",
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}
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dbi.Register(DbTypeGauss, gauss)
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}
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const (
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DbTypePostgres dbi.DbType = "postgres"
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DbTypeGauss dbi.DbType = "gauss"
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DbTypeKingbaseEs dbi.DbType = "kingbaseEs"
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DbTypeVastbase dbi.DbType = "vastbase"
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)
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type Meta struct {
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Param string
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}
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func (pm *Meta) GetSqlDb(ctx context.Context, d *dbi.DbInfo) (*sql.DB, error) {
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driverName := "postgres"
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// SSH Conect
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if d.SshTunnelMachineId > 0 {
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// 如果使用了隧道，则使用`postgres:ssh:隧道机器id`注册名
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driverName = fmt.Sprintf("postgres:ssh:%d", d.SshTunnelMachineId)
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if !collx.ArrayContains(sql.Drivers(), driverName) {
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sql.Register(driverName, &PqSqlDialer{sshTunnelMachineId: d.SshTunnelMachineId})
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}
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sql.Drivers()
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}
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db := d.Database
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var dbParam string
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existSchema := false
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// postgres database可以使用db/schema表示，方便连接指定schema, 若不存在schema则使用默认schema
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ss := strings.Split(db, "/")
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if len(ss) > 1 {
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existSchema = true
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dbParam = fmt.Sprintf("dbname=%s search_path=%s", ss[0], ss[len(ss)-1])
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} else {
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dbParam = "dbname=" + db
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}
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dsn := fmt.Sprintf("host=%s port=%d user=%s password=%s %s sslmode=disable connect_timeout=8", d.Host, d.Port, d.Username, d.Password, dbParam)
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// 存在额外指定参数，则拼接该连接参数
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if d.Params != "" {
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// 存在指定的db，则需要将dbInstance配置中的parmas排除掉dbname和search_path
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if db != "" {
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paramArr := strings.Split(d.Params, "&")
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paramArr = collx.ArrayRemoveFunc(paramArr, func(param string) bool {
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if strings.HasPrefix(param, "dbname=") {
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return true
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}
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if existSchema && strings.HasPrefix(param, "search_path") {
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return true
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}
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return false
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})
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d.Params = strings.Join(paramArr, " ")
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}
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dsn = fmt.Sprintf("%s %s", dsn, strings.Join(strings.Split(d.Params, "&"), " "))
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}
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if pm.Param != "" && !strings.Contains(dsn, "dbtype") {
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dsn = fmt.Sprintf("%s %s", dsn, pm.Param)
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}
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return sql.Open(driverName, dsn)
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}
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func (pm *Meta) GetDialect(conn *dbi.DbConn) dbi.Dialect {
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return &PgsqlDialect{dc: conn}
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}
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func (pm *Meta) GetMetadata(conn *dbi.DbConn) dbi.Metadata {
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return &PgsqlMetadata{dc: conn}
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}
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func (pm *Meta) GetDbDataTypes() []*dbi.DbDataType {
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return collx.AsArray(
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Bool, Int2, Int4, Int8, Numeric, Decimal, Smallserial, Serial, Bigserial, Largeserial,
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Money,
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Char, Nchar, Varchar, Text, Json,
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Date, Time, Timestamp,
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Bytea,
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)
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}
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func (pm *Meta) GetCommonTypeConverter() dbi.CommonTypeConverter {
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return &commonTypeConverter{}
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}
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// pgsql dialer
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type PqSqlDialer struct {
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sshTunnelMachineId int
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}
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func (pd *PqSqlDialer) Open(name string) (driver.Conn, error) {
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return pq.DialOpen(pd, name)
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}
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func (pd *PqSqlDialer) Dial(network, address string) (net.Conn, error) {
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// todo context.Background可能存在问题
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sshTunnel, err := dbi.GetSshTunnel(context.Background(), pd.sshTunnelMachineId)
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if err != nil {
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return nil, err
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}
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if sshConn, err := sshTunnel.GetDialConn("tcp", address); err == nil {
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// 将ssh conn包装，否则会返回错误: ssh: tcpChan: deadline not supported
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return &netx.WrapSshConn{Conn: sshConn}, nil
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} else {
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return nil, err
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}
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}
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func (pd *PqSqlDialer) DialTimeout(network, address string, timeout time.Duration) (net.Conn, error) {
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return pd.Dial(network, address)
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}
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