Ultra-som de Gabriel

Uma das últimas dele. Ansioso demais pra que ele venha logo ao mundo!

Agora, o bico é da mamãe! kkkkkkkkk

Mail on PHP

Many people have posted about this before, but exactly because is a basic matter, is good to post my opinion on this subject.

About 4 years ago, I had to create a PHP code to send e-mail, but may lack of know how made me forget to make the mail function to work out. Besides, not everytime you can make such fixes on your server. This lead me to create the mail using sockets and sending commands to the smtp server of my preference.

In that time, hotmail, yahoo and gmail allowed the use of the smtp commands by telnet without worries. They hadn’t implemented at all the security protocols, like ssl or tls. That’s a good thing they had implemented security, of course. But,… and programming? What’s the difference now?

You cant say that the old code will still work out fine. It really can’t! if you try the correct commands on the telnet, all you’ll get is the client disconnection on the 3rd command sent to server. Fortunately, PEAR have a implementation of the SMTP protocol and have everything there to be used.

To install the package on your development machine, just type on the console (as a root if you are on linux)

1. pear install Net_SMTP
2. pear install Mail

Then its just to use some code like the one below:

require_once 'Mail.php';

class MyMail{
	private $to;
	private $from;
	private $subject = "Testando envio autenticado pelo Google";
	private $body = "Teste efetuado com sucesso!";
	private $host = "ssl://smtp.gmail.com";
	private $port = 25;
	private $username;
	private $password;
	public function getTo(){
		return $this->to;
	}
	public function setTo($t){
		$this->to = $t;
	}
	public function getFrom(){
		return $this->from;
	}
	public function setFrom($f){
		$this->from = $f;
	}
	public function getSubject(){
		return $this->subject;
	}
	public function setSubject($s){
		$this->subject = $s;
	}
	public function getBody(){
		return $this->body;
	}
	public function setBody($b){
		$this->body = $b;
	}
	public function getHost(){
		return $this->host;
	}
	public function setHost($h){
		$this->host = $h;
	}
	public function getPort(){
		return $this->port;
	}
	public function setPort($p){
		$this->port = $p;
	}
	public function getUsername(){
		return $this->username;
	}
	public function setUsername($un){
		$this->username = $un;
	}
	public function getPassword(){
		return $this->password;
	}
	public function setPassword($p){
		$this->password = $p;
	}
	public function send(){
		$headers = array ('From' => $this->getFrom(),
                            'To' => $this->getTo(),
                            'Subject' => $this->getSubject());

		$smtp = Mail::factory("smtp", array ('host' => $this->getHost(),
                                          'port' => $this->getPort(), // SMTPS(para mais detalhes ver /etc/services
                                          'auth' => true,
                                          'debug' => true, // Debug ligado
                                          'username' => $this->getUsername(),
                                          'password' => $this->getPassword())
		);
		$rc = $smtp->send($this->;to, $headers, $this->body);
		if(PEAR::isError($rc)){
			echo("<h1>Error " . $rc->getMessage(). "</h1>");
		} else {
			echo("Email enviado com sucesso!!");
		}
	}
}

It’s a preliminary class, so, many enhancements can be made to make the class better, but it just works as expected. Example to use? see below:

        if(isset($_POST)){
            require_once 'MyMail.class.php';
            $ms = new MyMail();
            $ms->setFrom('me@gmail.com');
            $ms->setTo('noone@gmail.com');
            $ms->setHost('smtp.google.com');
            $ms->setPort('25');
            $ms->setUsername('me@gmail.com');
            $ms->setPassword('p@ssw0rd');
            $ms->setBody('Test Message using PHP');
            $ms->setSubject('Test');
            $ms->send();
	}

This will produce the following stream to be sent to the server:

DEBUG: Recv: 220 mx.google.com ESMTP 23sm733843qyk.3
DEBUG: Send: EHLO localhost

DEBUG: Recv: 250-mx.google.com at your service, [189.70.93.58]
DEBUG: Recv: 250-SIZE 35651584
DEBUG: Recv: 250-8BITMIME
DEBUG: Recv: 250-STARTTLS
DEBUG: Recv: 250-ENHANCEDSTATUSCODES
DEBUG: Recv: 250 PIPELINING
DEBUG: Send: STARTTLS

DEBUG: Recv: 220 2.0.0 Ready to start TLS
DEBUG: Send: EHLO localhost

DEBUG: Recv: 250-mx.google.com at your service, [189.70.93.58]
DEBUG: Recv: 250-SIZE 35651584
DEBUG: Recv: 250-8BITMIME
DEBUG: Recv: 250-AUTH LOGIN PLAIN
DEBUG: Recv: 250-ENHANCEDSTATUSCODES
DEBUG: Recv: 250 PIPELINING
DEBUG: Send: AUTH LOGIN

DEBUG: Recv: 334 VXNlcm5hbWU6
DEBUG: Send: ZmFiaW8uY2VzYXIubWVkZWlyb3NAZ21haWwuY29t

DEBUG: Recv: 334 UGFzc3dvcmQ6
DEBUG: Send: ZG1hdGRtYXQwMQ==

DEBUG: Recv: 235 2.7.0 Accepted
DEBUG: Send: MAIL FROM:<sender-mail@gmail.com>

DEBUG: Recv: 250 2.1.0 OK 23sm733843qyk.3
DEBUG: Send: RCPT TO:<receiver-email@gmail.com>

DEBUG: Recv: 250 2.1.5 OK 23sm733843qyk.3
DEBUG: Send: DATA

DEBUG: Recv: 354  Go ahead 23sm733843qyk.3
DEBUG: Send: From: sender-email@gmail.com
To: receiver-email@gmail.com
Subject: Teste de e-mail

Teste de E-mail via Sockets
.

DEBUG: Recv: 250 2.0.0 OK 1256749304 23sm733843qyk.3
DEBUG: Send: QUIT

DEBUG: Recv: 221 2.0.0 closing connection 23sm733843qyk.3

First (?) Announcement of Windows 7 Failure

Today on twitter, @lauromoura has tweet a report about a Windows 7 failure. See the link:

http://seclists.org/fulldisclosure/2009/Sep/0039.html

Worth to see, what Steve Ballmer said on Vista’s release and the press opinions: here.

Fact: no Windows (and no Operating System) will be totally secure. It’s all just a matter of time.

Microsoft Training Kits

Well, It’s just one more tip. Microsoft has been releasing some Training Kits for the technologies that are running on market today. I’ve found some of them and the links are below:

• SharePoint 2007 Training Kit

http://www.microsoft.com/downloads/details.aspx?FamilyID=673dc932-626a-4e59-9dca-16d685600a51&displaylang=en

• Windows 7 Training Kit for Developers

http://www.microsoft.com/downloads/details.aspx?familyid=1C333F06-FADB-4D93-9C80-402621C600E7&displaylang=en

• Visual Studio 2008 Training Kit

http://www.microsoft.com/DOWNLOADS/details.aspx?familyid=8BDAA836-0BBA-4393-94DB-6C3C4A0C98A1&displaylang=en

• Visual Studio 2010 and .NET Framework 4 Training Kit

http://www.microsoft.com/downloads/details.aspx?familyid=752CB725-969B-4732-A383-ED5740F02E93&displaylang=en

• SQL Server 2008 Training Kit

http://www.microsoft.com/downloadS/details.aspx?familyid=E9C68E1B-1E0E-4299-B498-6AB3CA72A6D7&displaylang=en

• ASP.NET MVC Training Kit

http://www.microsoft.com/downloads/details.aspx?FamilyID=1E0BE0B2-910A-4676-9F3A-41E4D9C0FC08&displaylang=en

• .NET 3.5 Enhancements Training Kit

http://www.microsoft.com/downloads/details.aspx?FamilyID=355c80e9-fde0-4812-98b5-8a03f5874e96&displaylang=en

Some day I’ll have time to study some of them.

Enjoy!

Searching columns by type

Today I went to review the SQL Server 2008 enhancements on XML support. To test the queries on AdventureWorks, the first thing I needed to know was: “Where are the XML data columns?”

I don’t actually have the graphic on the database model to search for and wasn’t on the mood to create the database diagram to search visually for the XML columns.

Then, I’ve got the idea of searching on the catalog for that. It should be simple to do (and it was!) but worth the post, as many people may have the need to use the same thing, not only on AdventureWorks, but on large (I mean many tables) databases:

Here is the script:

SELECT t.name, c.name, ty.name
  FROM sys.tables t INNER JOIN sys.columns c  ON
          (t.object_id = c.object_id)
      INNER JOIN sys.systypes ty ON
          (c.system_type_id = ty.xtype)
WHERE ty.name = ‘xml’

With this script, you can create a procedure that returns the table name and the column name that uses a type that’s passed by a parameter. Or even create a PowerShell function to achieve this. Let’s see the latter:

param([string] $typeName, [string] $server, [string] $database)
$sqlConnection = New-Object System.Data.SqlClient.SqlConnection "server=$server;database=$database;Integrated Security=sspi"
$sqlConnection.Open()
$sqlCommand = $sqlConnection.CreateCommand()
$sqlCommand.CommandText = "SELECT t.name [Table], c.name [Column]
                                                  FROM sys.tables t INNER JOIN sys.columns c
                                                          ON (t.object_id = c.object_id) 
                                                                           INNER JOIN sys.systypes ty 
                                                          ON (c.system_type_id = ty.xtype)
                                               WHERE ty.name = ‘$typename ‘"
$sqlReader = $sqlCommand.ExecuteReader()
$dataTable = New-Object System.Data.DataTable
$dataTable.Load($sqlReader);
$sqlConnection.Close()
Write-Output $dataTable

Interesting, huh?

MCTS: SQL Server 2005

Bem, um pouquinho tarde, mas enfim, passei nesse sábado na prova 70-431: Microsoft SQL Server 2005 – Implementation and Maintenance, inaugurando a minha intenção de me especializar em banco de dados.

A prova é composta de duas partes, uma com 35 questões objetivas, e outra com 12 questões de simulação. A parte objetiva é bem tradicional, e pelo menos as questões que foram selecionadas na minha prova foram bem distribuídas nos assuntos. Houveram questões de XML, de desenvolvimento com CLR, backup/restore, … acho que só não caiu de Service Broker. Na parte prática, tive sorte e das 12 questões, 4 foram sobre backup/restore (para configurar um backup de acordo com algumas características pedidas).

Agora é estudar pra atualizar pra MCTS: SQL Server 2008!

Windows 7 RC is released

Yeah testers, the new Windows has just been released for testing. It’s avaliable here.

Microsoft recommends that you don’t upgrade from beta to RC, but reinstall from scratch.

Enjoy it! Test it!

Backup no SQL Server 2008

Este vai ser um post sobre um tema introdutório para administradores de banco de dados. Uma tarefa comum que deve ser realizada de tempos em tempos e pela sua importância, é importante que ocorra com frequência, para que se tenha segurança com relação a algum desastre que possa acontecer… ninguém sabe quando um erro pode ocorrer, ou quando os dados podem ficar corrompidos, por esse ou aquele motivo.

Dentro do SQL Server 2008, os backups podem ser feitos de algumas formas:

• Full
  • Faz o backup de todo o banco de dados. Isso inclui não somente o arquivo de dados mas também o log de transações, e com isso representam todo o banco de dados num determinado momento do tempo.
  • Sintaxe: BACKUP DATABASE <NOME_DO_DATABASE> TO DISK =<CAMINHO_PRO_ARQUIVO_DE_BACKUP>;
  • Ex.: BACKUP DATABASE teste TO DISK = N’C:\Backups\teste.bak’;
• Differential
  • Não confundir com backup incremental. Este backup diz respeito as diferenças ocorridas no banco de dados após o último full backup. Um backup incremental armazenaria as diferenças entre o momento atual e o último backup (que não necessariamente seria full);
  • De acordo com o que foi exposto acima, não é possível então, fazer um backup diferencial sem antes ter feito um backup full;
  • Por manipularem somente as diferenças entre um backup full e o estado atual, tendem a ser sempre backups mais rápidos de serem executados, e menores no espaço em disco ocupado;
  • Sintaxe: BACKUP DATABASE <NOME_DO_DATABASE> TO DISK <CAMINHO_PRO_ARQUIVO_DE_BACKUP> WITH DIFFERENTIAL;
  • Ex.: BACKUP DATABASE teste TO DISK = N’C:\Backups\teste.bak’ WITH DIFFERENTIAL;
• Log Full
  • Realiza o backup total do log de transações;
  • Sintaxe: BACKUP LOG <NOME_DO_DATABASE> TO DISK <CAMINHO_PRO_ARQUIVO_DE_BACKUP>;
  • Ex.: BACKUP LOG teste TO DISK = N’C:\Backups\teste.trn’ WITH DIFFERENTIAL;
• Log Differential
  • Realiza o backup diferencial do log de transações;
  • Sintaxe: BACKUP LOG <NOME_DO_DATABASE> TO DISK <CAMINHO_PRO_ARQUIVO_DE_BACKUP> WITH DIFFERENTIAL;
  • Ex.: BACKUP LOG teste TO DISK = N’C:\Backups\teste.trn’ WITH DIFFERENTIAL;

Apesar de usarmos as extensões bak e trn, não há obrigatoriedade dessas extensões, sendo somente uma boa prática as que foram usadas nos exemplos.

No SQL Server 2008 foi introduzida uma novidade que é a compressão de backup. Por default este é um recurso que está desativado. Para poder usar como um recurso padrão para todos os backups, primeiro é preciso reconfigurar a base de dados, com:

sp_configure ‘backup compression default’, 1;
go

reconfigure;

Com isso, habilitamos no servidor a compressão de backup por default, o que significa que todo banco de dados terá backups comprimidos. Foi então adicionada a query de backup a opção do with COMPRESSION ou NO_COMPRESSION, para que se possa escolher na query se se deseja um backup comprimido ou não.

Além destas formas, também é possível usar a simples estratégia de Attach/Detach que é extremamente conveniente, quando se pode deixar o banco off-line por algum tempo.

[1] White Paper sobre compressão de backup no SQL Server 2008
[2] Backing Up and Restoring How-to Topics
[3] Copy-Only Backups
[4] Full Database Backups
[5] Differential Database Backups

Who’s connected to my SQL Server?

There are two easy ways to do this. The SQL Server, have two procedures, sp_who and sp_who2 that solves this problem. Syntax:

sp_who 'loginname'

The sp_who procedure shows information about the actual users, sessions and process in a instance of SQL Server. Can be executed without parameters, and returns info about all users and sessions and processes.

The sp_who2 procedure show the same information that sp_who shows (and works the same way too), but adds the cpu time and disk io consumption on the result.

Another way is use the query below, you can retrieve the same information (in less detail) from the sysprocesses system view.

SELECT DB_NAME(dbid) as [database]
                        [login_time],
                        [open_tran],
                        [nt_username]
                        [hostname],
                        [program_name]
  FROM master..sysProcesses

[1] sp_who documentation

[2] Forum Messages about sp_who and sp_who2 (Portuguese)

Windows Vista Performance Roundtable

With the launch of Windows Vista SP1 giving some significant fixes on performance issues on the operating system, Microsoft tries to take off the slow adjective from the mouth of users who tried Windows Vista.

Personally, SP1 really had improved performance, but much more can be done to take it better.

Below is a round table with Microsoft specialists, that’s very interesting to understand what can be done to take the performance of day-to-day operations better.

Springboard Series Virtual Roundtable: Windows Vista Performance