88 lines
1.9 KiB
Go
88 lines
1.9 KiB
Go
// Copyright 2012 Julien Schmidt. All rights reserved.
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// http://www.julienschmidt.com
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
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package mysql
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import (
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"database/sql"
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"database/sql/driver"
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"net"
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"time"
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)
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type mysqlDriver struct{}
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// Open new Connection.
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// See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how
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// the DSN string is formated
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func (d *mysqlDriver) Open(dsn string) (driver.Conn, error) {
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var err error
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// New mysqlConn
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mc := &mysqlConn{
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cfg: parseDSN(dsn),
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maxPacketAllowed: maxPacketSize,
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maxWriteSize: maxPacketSize - 1,
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}
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// Connect to Server
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if _, ok := mc.cfg.params["timeout"]; ok { // with timeout
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var timeout time.Duration
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timeout, err = time.ParseDuration(mc.cfg.params["timeout"])
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if err == nil {
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mc.netConn, err = net.DialTimeout(mc.cfg.net, mc.cfg.addr, timeout)
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}
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} else { // no timeout
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mc.netConn, err = net.Dial(mc.cfg.net, mc.cfg.addr)
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}
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if err != nil {
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return nil, err
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}
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mc.buf = newBuffer(mc.netConn)
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// Reading Handshake Initialization Packet
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err = mc.readInitPacket()
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if err != nil {
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return nil, err
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}
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// Send Client Authentication Packet
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err = mc.writeAuthPacket()
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if err != nil {
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return nil, err
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}
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// Read Result Packet
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err = mc.readResultOK()
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if err != nil {
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return nil, err
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}
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// Get max allowed packet size
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maxap, err := mc.getSystemVar("max_allowed_packet")
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if err != nil {
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return nil, err
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}
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mc.maxPacketAllowed = stringToInt(maxap) - 1
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if mc.maxPacketAllowed < maxPacketSize {
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mc.maxWriteSize = mc.maxPacketAllowed
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}
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// Handle DSN Params
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err = mc.handleParams()
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if err != nil {
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return nil, err
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}
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return mc, err
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}
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func init() {
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sql.Register("mysql", &mysqlDriver{})
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}
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