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/*
* This file is part of LibEuFin.
* Copyright (C) 2024 Taler Systems S.A.
*
* LibEuFin is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3, or
* (at your option) any later version.
*
* LibEuFin is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
* Public License for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with LibEuFin; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>
*/
package tech.libeufin.common.db
import tech.libeufin.common.*
import org.postgresql.ds.PGSimpleDataSource
import org.postgresql.jdbc.PgConnection
import org.postgresql.util.PSQLState
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import io.ktor.http.parseQueryString
import java.net.URI
import java.nio.file.Path
import java.sql.PreparedStatement
import java.sql.ResultSet
import java.sql.SQLException
import kotlin.io.path.Path
fun currentUser(): String = System.getProperty("user.name")
/**
* This function converts postgresql:// URIs to JDBC URIs.
*
* URIs that are already jdbc: URIs are passed through.
*
* This avoids the user having to create complex JDBC URIs for postgres connections.
* They are especially complex when using unix domain sockets, as they're not really
* supported natively by JDBC.
*/
fun jdbcFromPg(pgConn: String): String {
// Pass through jdbc URIs.
if (pgConn.startsWith("jdbc:")) {
return pgConn
}
if (!pgConn.startsWith("postgresql://") && !pgConn.startsWith("postgres://")) {
throw Exception("Not a Postgres connection string: $pgConn")
}
var maybeUnixSocket = false
val uri = URI(pgConn)
val params = parseQueryString(uri.query ?: "", decode = false)
val host = uri.host ?: params["host"] ?: System.getenv("PGHOST")
if (host == null || host.startsWith('/')) {
val port = (if (uri.port == -1) null else uri.port.toString()) ?: params["port"] ?: System.getenv("PGPORT") ?: "5432"
val user = params["user"] ?: currentUser()
val unixPath = (host ?:"/var/run/postgresql") + "/.s.PGSQL.$port"
return "jdbc:postgresql://localhost${uri.path}?user=$user&socketFactory=org.newsclub.net.unix." +
"AFUNIXSocketFactory\$FactoryArg&socketFactoryArg=$unixPath"
}
if (pgConn.startsWith("postgres://")) {
// The JDBC driver doesn't like postgres://, only postgresql://.
// For consistency with other components, we normalize the postgres:// URI
// into one that the JDBC driver likes.
return "jdbc:postgresql://" + pgConn.removePrefix("postgres://")
}
logger.info("connecting to database via JDBC string '$pgConn'")
return "jdbc:$pgConn"
}
data class DatabaseConfig(
val dbConnStr: String,
val sqlDir: Path
)
fun pgDataSource(dbConfig: String): PGSimpleDataSource {
val jdbcConnStr = jdbcFromPg(dbConfig)
logger.debug("connecting to database via JDBC string '$jdbcConnStr'")
val pgSource = PGSimpleDataSource()
pgSource.setUrl(jdbcConnStr)
pgSource.prepareThreshold = 1
return pgSource
}
fun PGSimpleDataSource.pgConnection(schema: String? = null): PgConnection {
val conn = connection.unwrap(PgConnection::class.java)
if (schema != null) conn.execSQLUpdate("SET search_path TO $schema")
return conn
}
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