mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-05 09:03:48 +08:00
aa7c34cf86
* fix error log when loading issues caused by a xorm bug * upgrade packages * fix fmt * fix Consistency * fix tests
173 lines
4.4 KiB
Go
173 lines
4.4 KiB
Go
// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
// Package mysql provides a MySQL driver for Go's database/sql package.
|
|
//
|
|
// The driver should be used via the database/sql package:
|
|
//
|
|
// import "database/sql"
|
|
// import _ "github.com/go-sql-driver/mysql"
|
|
//
|
|
// db, err := sql.Open("mysql", "user:password@/dbname")
|
|
//
|
|
// See https://github.com/go-sql-driver/mysql#usage for details
|
|
package mysql
|
|
|
|
import (
|
|
"database/sql"
|
|
"database/sql/driver"
|
|
"net"
|
|
"sync"
|
|
)
|
|
|
|
// watcher interface is used for context support (From Go 1.8)
|
|
type watcher interface {
|
|
startWatcher()
|
|
}
|
|
|
|
// MySQLDriver is exported to make the driver directly accessible.
|
|
// In general the driver is used via the database/sql package.
|
|
type MySQLDriver struct{}
|
|
|
|
// DialFunc is a function which can be used to establish the network connection.
|
|
// Custom dial functions must be registered with RegisterDial
|
|
type DialFunc func(addr string) (net.Conn, error)
|
|
|
|
var (
|
|
dialsLock sync.RWMutex
|
|
dials map[string]DialFunc
|
|
)
|
|
|
|
// RegisterDial registers a custom dial function. It can then be used by the
|
|
// network address mynet(addr), where mynet is the registered new network.
|
|
// addr is passed as a parameter to the dial function.
|
|
func RegisterDial(net string, dial DialFunc) {
|
|
dialsLock.Lock()
|
|
defer dialsLock.Unlock()
|
|
if dials == nil {
|
|
dials = make(map[string]DialFunc)
|
|
}
|
|
dials[net] = dial
|
|
}
|
|
|
|
// Open new Connection.
|
|
// See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how
|
|
// the DSN string is formated
|
|
func (d MySQLDriver) Open(dsn string) (driver.Conn, error) {
|
|
var err error
|
|
|
|
// New mysqlConn
|
|
mc := &mysqlConn{
|
|
maxAllowedPacket: maxPacketSize,
|
|
maxWriteSize: maxPacketSize - 1,
|
|
closech: make(chan struct{}),
|
|
}
|
|
mc.cfg, err = ParseDSN(dsn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
mc.parseTime = mc.cfg.ParseTime
|
|
|
|
// Connect to Server
|
|
dialsLock.RLock()
|
|
dial, ok := dials[mc.cfg.Net]
|
|
dialsLock.RUnlock()
|
|
if ok {
|
|
mc.netConn, err = dial(mc.cfg.Addr)
|
|
} else {
|
|
nd := net.Dialer{Timeout: mc.cfg.Timeout}
|
|
mc.netConn, err = nd.Dial(mc.cfg.Net, mc.cfg.Addr)
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Enable TCP Keepalives on TCP connections
|
|
if tc, ok := mc.netConn.(*net.TCPConn); ok {
|
|
if err := tc.SetKeepAlive(true); err != nil {
|
|
// Don't send COM_QUIT before handshake.
|
|
mc.netConn.Close()
|
|
mc.netConn = nil
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// Call startWatcher for context support (From Go 1.8)
|
|
if s, ok := interface{}(mc).(watcher); ok {
|
|
s.startWatcher()
|
|
}
|
|
|
|
mc.buf = newBuffer(mc.netConn)
|
|
|
|
// Set I/O timeouts
|
|
mc.buf.timeout = mc.cfg.ReadTimeout
|
|
mc.writeTimeout = mc.cfg.WriteTimeout
|
|
|
|
// Reading Handshake Initialization Packet
|
|
authData, plugin, err := mc.readHandshakePacket()
|
|
if err != nil {
|
|
mc.cleanup()
|
|
return nil, err
|
|
}
|
|
if plugin == "" {
|
|
plugin = defaultAuthPlugin
|
|
}
|
|
|
|
// Send Client Authentication Packet
|
|
authResp, err := mc.auth(authData, plugin)
|
|
if err != nil {
|
|
// try the default auth plugin, if using the requested plugin failed
|
|
errLog.Print("could not use requested auth plugin '"+plugin+"': ", err.Error())
|
|
plugin = defaultAuthPlugin
|
|
authResp, err = mc.auth(authData, plugin)
|
|
if err != nil {
|
|
mc.cleanup()
|
|
return nil, err
|
|
}
|
|
}
|
|
if err = mc.writeHandshakeResponsePacket(authResp, plugin); err != nil {
|
|
mc.cleanup()
|
|
return nil, err
|
|
}
|
|
|
|
// Handle response to auth packet, switch methods if possible
|
|
if err = mc.handleAuthResult(authData, plugin); err != nil {
|
|
// Authentication failed and MySQL has already closed the connection
|
|
// (https://dev.mysql.com/doc/internals/en/authentication-fails.html).
|
|
// Do not send COM_QUIT, just cleanup and return the error.
|
|
mc.cleanup()
|
|
return nil, err
|
|
}
|
|
|
|
if mc.cfg.MaxAllowedPacket > 0 {
|
|
mc.maxAllowedPacket = mc.cfg.MaxAllowedPacket
|
|
} else {
|
|
// Get max allowed packet size
|
|
maxap, err := mc.getSystemVar("max_allowed_packet")
|
|
if err != nil {
|
|
mc.Close()
|
|
return nil, err
|
|
}
|
|
mc.maxAllowedPacket = stringToInt(maxap) - 1
|
|
}
|
|
if mc.maxAllowedPacket < maxPacketSize {
|
|
mc.maxWriteSize = mc.maxAllowedPacket
|
|
}
|
|
|
|
// Handle DSN Params
|
|
err = mc.handleParams()
|
|
if err != nil {
|
|
mc.Close()
|
|
return nil, err
|
|
}
|
|
|
|
return mc, nil
|
|
}
|
|
|
|
func init() {
|
|
sql.Register("mysql", &MySQLDriver{})
|
|
}
|