You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: connector.go
    path of file: ./repos/sliver/vendor/github.com/go-sql-driver/mysql
    
    the code of the file until where you have to start completion: // Go MySQL Driver - A MySQL-Driver for Go's database/sql package
//
// Copyright 2018 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

import (
	"context"
	"database/sql/driver"
	"net"
)

type connector struct {
	cfg *Config // immutable private copy.
}

// Connect implements driver.Connector interface.
// Connec
    
func (c *connector) Connect(ctx context.Context) (driver.Conn, error) {
	var err error

	// New mysqlConn
	mc := &mysqlConn{
		maxAllowedPacket: maxPacketSize,
		maxWriteSize:     maxPacketSize - 1,
		closech:          make(chan struct{}),
		cfg:              c.cfg,
	}
	mc.parseTime = mc.cfg.ParseTime

	// Connect to Server
	dialsLock.RLock()
	dial, ok := dials[mc.cfg.Net]
	dialsLock.RUnlock()
	if ok {
		dctx := ctx
		if mc.cfg.Timeout > 0 {
			var cancel context.CancelFunc
			dctx, cancel = context.WithTimeout(ctx, c.cfg.Timeout)
			defer cancel()
		}
		mc.netConn, err = dial(dctx, mc.cfg.Addr)
	} else {
		nd := net.Dialer{Timeout: mc.cfg.Timeout}
		mc.netConn, err = nd.DialContext(ctx, 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)
	mc.startWatcher()
	if err := mc.watchCancel(ctx); err != nil {
		mc.cleanup()
		return nil, err
	}
	defer mc.finish()

	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
}