使用swoole进行消息推送通知，配合vb.net进行客户端开发一样爽[开发篇]

　　在以前的项目中，就曾听说过swoole的大名，想用来进行消息推送，但是当时只是有了初步的了解，并不敢大胆的运用到线上产品。所谓 识不足则多虑，威不足则多怒、所以就是怕，只能跟领导说了运用极光的推送功能，而且还说出了一定的理由，领导自然也只有相信了，那就用极光推送吧！

　　最近闲来无事，又重新温习了一下swoole的消息通知功能，虽然在项目开发当时，也曾实现过简单的操作的，但是这次温习更加深了学习，配合vb.net进行开发，感觉还是棒棒哒，下面是一套实现过程，如有需要参考，请拿去，不谢！

　　首先，我的开发平台是windows，虽然本人也装有virtual box虚拟机，但是那玩意儿太耗内存cpu了，开起来搞实在不想搞。所以，就用了cygwin进行配置开发环境搭建，这里我就不说具体安装步骤了，给个链接吧，一步步按着操作就行了。 查看php在window下安装swoole扩展的方法 请点击。 ps: 如果你win系统里已经安装了一套wamp环境，在cygwin中使用php或其他和win有相同名称命令时，请记得使用全路径 如：/bin/php index.php , /bin/find / -name "init*"

　　第二步、编写php服务端程序,命名 test_tcp_server.php , 代码如下：

<?php
    $serv = new swoole_server("127.0.0.1", 9501);
    $serv->set(array(
        'worker_num' => 2,       //工作进程数量
        // 'daemonize' => true, //是否作为守护进程,玩玩就不要开启这东西了，不然你都不知道跑到哪里去了
    ));
    $serv->on('connect', 'my_onConnect');
    $serv->on('receive', 'my_onReceive');
    $serv->on('close', 'my_onClose');
    echo "swoole_server is running on 127.0.0.1 9501 \n";
    $serv->start();

    //receive msg respond
    function my_onReceive ($serv, $fd, $from_id, $data) {
        // var_dump($serv);
        $data = trim($data);
        // 发送给谁, 如:@id msg...  , 最好的当然是使用redis或者数据库存入号码并生成一个映射了，不过玩玩就不要认真了
        if(substr($data, 0, 1) == '@'){
            $splitStart = strpos($data, ' ');
            $toUserId = substr($data, 1, $splitStart - 1);
            echo 'Send to:' . $toUserId . ';';
            $content = substr($data, $splitStart + 1);
            if(is_numeric($toUserId)){
                $serv->send($toUserId, "From Client[$fd@$from_id]:" . $content);
            }elseif(strtolower($toUserId) == 'all'){
                broadcast($serv, $fd, $content);
            }else{
                $serv->send($fd, 'Swoole: Unkown to user ' . strtolower($toUserId) . ' infomation.');
            }
        }else{
            echo "From Client[$fd@$from_id],received data: " . $data . PHP_EOL;
            $serv->send($fd, 'Swoole: '.$data);
        }
        // $serv->close($fd);
    }
    //connect action
    function my_onConnect ($serv, $fd){
        echo "Client:Connect. id:{$fd}\n";
    }
    //close action
    function my_onClose ($serv, $fd) {
        echo "Client: Close. id:{$fd}\n";
    }
    //broadcast except me, 只会广播from_id相同的用户,再研究了
    function broadcast(swoole_server $serv, $fd = 0, $data = "hello")
    {
        $start_fd = 0;
        $sendNum = 0;
        echo "broadcast to ";
        $from = "From Client[$fd]:";
        while(true)
        {
            $conn_list = $serv->connection_list($start_fd, 10);
            if($conn_list === false)
            {
                break;
            }
            var_dump($conn_list);
            $start_fd = end($conn_list);
            foreach($conn_list as $conn)
            {
                if($conn === $fd) continue;
                $ret1 = $serv->send($conn, $from . $data);
                $sendNum ++;
            }
        }
        echo $sendNum . ' numbers.';
    }

　　记得把它跑起来哦

/bin/php test_tcp_server.php

　　第三步，你可以编写一个客户端程序，也可以不用编写，因为其他工具也完全可以连接进行的呢！如果要定，可以参考swoole官网的tcp_client代码，如下：

<?php
    $client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);
    //设置事件回调函数
    $client->on("connect", function($cli) {
        $cli->send("hello world\n");
    });
    $client->on("receive", function($cli, $data){
        echo "Received: ".$data."\n";
    });
    $client->on("error", function($cli){
        echo "Connect failed\n";
    });
    $client->on("close", function($cli){
        echo "Connection close\n";
    });
    //发起网络连接
    $client->connect('127.0.0.1', 9501, 0.5);

　　正常的话，运行这个脚本，你就可以收到消息了如：  'From Client[1@0],received data: hello,world'

　　第四步、你肯定不满足于使用php语言去连接服务器端，你当然不应该满足！你还可以使用windows的cmd命令行嘛，如下：

telnet 127.0.0.1 9501

然后，你会发现，怎么只输入了一个字符就发送了。原因是什么win的telnet协议之类的，使用send命令，就可以了。操作为：按键 ctrl + ] ，进入telnet 命令行模式，输入send aaaddd

ok,多开几个客户端，看起来会话就可以了呢（要查看返回的内容，直接按Enter键即可，切换回来使用ctrl + ]），来看看服务端都什么样子吧：

都是有响应的吧，ok了，现在再试试一个功能, send @10 hello,10, you ok ? ，则另一个客户端就收到消息了

ok,到此为止，基本上测试完成了。但是使用cmd毕竟看起来不爽，于是想到用vb.net去实现一个客户端。代码就简要的贴出来，看看吧。

　　第五步，使用vb.net实现客户端访问：

Imports System
Imports System.Net
Imports System.Net.Sockets
Imports System.Text

Public Class SynchronousSocketClient
    Protected Shared port As Integer = 9501
    Protected Shared host As String = "localhost"

    Private Shared sender As Socket
    Public Shared bytes(1024) As Byte
    ' A way to the connect to the server
    Public Shared Sub Main()
        If (IsNothing(sender)) OrElse Not sender.Connected Then
            If Not IsNothing(Form1.TextBox1.Text) Then
                host = Form1.TextBox1.Text
            End If
            If (Form1.TextBox2.Text) Then
                port = Form1.TextBox2.Text
            End If
            sender = ConnectSocket(host, port)
        End If

    End Sub
    ' send something to server
    Public Shared Sub send()
        If (IsNothing(sender)) OrElse Not sender.Connected Then
            If Not IsNothing(Form1.TextBox1.Text) Then
                host = Form1.TextBox1.Text
            End If
            If (Form1.TextBox2.Text) Then
                port = Form1.TextBox2.Text
            End If
            sender = ConnectSocket(host, port)
        End If
        ' Encode the data string into a byte array.
        Dim msg As Byte() = Encoding.ASCII.GetBytes(Form1.myContent.Text)

        ' Send the data through the socket.
        Dim bytesSent As Integer = sender.Send(msg)

        ' Receive the response from the remote device.
        Dim bytesRec As Integer = sender.Receive(bytes)
        Console.WriteLine("ServerReturn = {0}", Encoding.ASCII.GetString(bytes, 0, bytesRec))
        Form1.infoText.Text &= "ServerReturn = " & Encoding.ASCII.GetString(bytes, 0, bytesRec) & vbNewLine
    End Sub
    ' connect initialize
    Private Shared Function ConnectSocket(ByVal host As String, ByVal port As Integer) As Socket '创建连接 
        Dim s As Socket = Nothing
        Dim hostEntry As IPHostEntry = Nothing

        'address = System.Net.IPAddress.Parse(host)
        Dim ipHostInfo As IPHostEntry = Dns.Resolve(host)
        Dim address As IPAddress = ipHostInfo.AddressList(0)
        Dim endPoint As New IPEndPoint(address, port)
        Dim tempSocket As New Socket(endPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
        tempSocket.Connect(endPoint)

        If tempSocket.Connected Then
            s = tempSocket
            Console.WriteLine("Socket connected to {0}", tempSocket.RemoteEndPoint.ToString())
            Form1.infoText.Text &= "Socket connected to " & tempSocket.RemoteEndPoint.ToString()
        End If
        Return s
    End Function
    ' close socket
    Public Shared Sub closeSocket()
        If (sender.Connected) Then
            Form1.infoText.Text &= "Socket closed : " & sender.RemoteEndPoint.ToString() & vbNewLine
            sender.Shutdown(SocketShutdown.Both)
            sender.Close()
        End If
    End Sub


End Class 'SynchronousSocketClient

如上是访问连接服务器的代码，触发代码则是在另一个页面进行的，界面如下：

运行后效果如下：

触发事件的代码就比较简单了，还是贴一下吧：

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'Console.WriteLine("console ", Rnd)             ' 无法读取最后一行console其实
        SynchronousSocketClient.Main()
        'AsynchronousClient.Main()                      ' 异步功能并未实现呢
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        infoText.Text = ""
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        SynchronousSocketClient.send()
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        SynchronousSocketClient.closeSocket()
    End Sub
End Class

　　到此，打完，收工。由于异步的调试没有成功，就此打住吧，以后有兴趣再去搞了！