TCP/UDP Socket调试工具
PHP在WIN下操作socket最好用命令行运行程序,一般可以用于大文件的上传
要建立一个简单的服务,如果不考虑性能方面的问题,比如并发100 左右的服务,可以简单的用 Socket + Pcntl(linux)。来实现
1.php加入环境变量,开启socket扩展
server端
- <?php
- //确保在连接客户端时不会超时
- set_time_limit(0);
- $ip = '127.0.0.1';
- $port = 1935;
- /*
- +-------------------------------
- * @socket通信整个过程
- +-------------------------------
- * @socket_create
- * @socket_bind
- * @socket_listen
- * @socket_accept
- * @socket_read
- * @socket_write
- * @socket_close
- +--------------------------------
- */
- /*---------------- 以下操作都是手册上的 -------------------*/
- if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) {
- echo "socket_create() 失败的原因是:" . socket_strerror($sock) . "\n";
- }
- if (($ret = socket_bind($sock, $ip, $port)) < 0) {
- echo "socket_bind() 失败的原因是:" . socket_strerror($ret) . "\n";
- }
- if (($ret = socket_listen($sock, 4)) < 0) {
- echo "socket_listen() 失败的原因是:" . socket_strerror($ret) . "\n";
- }
- $count = 0;
- do {
- if (($msgsock = socket_accept($sock)) < 0) {
- echo "socket_accept() failed: reason: " . socket_strerror($msgsock) . "\n";
- break;
- } else {
- //发到客户端
- $msg = "测试成功!\n";
- socket_write($msgsock, $msg, strlen($msg));
- echo "测试成功了啊\n";
- $buf = socket_read($msgsock, 8192);
- $talkback = "收到的信息:$buf\n";
- echo $talkback;
- if (++$count >= 5) {
- break;
- }
- }
- //echo $buf;
- socket_close($msgsock);
- } while (true);
- socket_close($sock);
- ?>
没有反映,对现在服务端的程序已经开始运行,端口已经开始监听了。
运行netstat -ano | find "1935"可以查看端口情况,我的是1935端口
端口已经处于LISTENING状态了。接下来我们只要运行客户端程序即可连接上。上代码
- <?php
- error_reporting(E_ALL);
- set_time_limit(0);
- echo "<h2>TCP/IP Connection</h2>\n";
- $port = 1935;
- $ip = "127.0.0.1";
- /*
- +-------------------------------
- * @socket连接整个过程
- +-------------------------------
- * @socket_create
- * @socket_connect
- * @socket_write
- * @socket_read
- * @socket_close
- +--------------------------------
- */
- $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
- if ($socket < 0) {
- echo "socket_create() failed: reason: " . socket_strerror($socket) . "\n";
- } else {
- echo "OK.\n";
- }
- echo "试图连接 '$ip' 端口 '$port'...\n";
- $result = socket_connect($socket, $ip, $port);
- if ($result < 0) {
- echo "socket_connect() failed.\nReason: ($result) " . socket_strerror($result) . "\n";
- } else {
- echo "连接OK\n";
- }
- $in = "Ho\r\n";
- $in .= "first blood\r\n";
- $out = '';
- if (!socket_write($socket, $in, strlen($in))) {
- echo "socket_write() failed: reason: " . socket_strerror($socket) . "\n";
- } else {
- echo "发送到服务器信息成功!\n";
- echo "发送的内容为:<font color='red'>$in</font> <br>";
- }
- while ($out = socket_read($socket, 8192)) {
- echo "接收服务器回传信息成功!\n";
- echo "接受的内容为:", $out;
- }
- echo "关闭SOCKET...\n";
- socket_close($socket);
- echo "关闭OK\n";
- ?>
SERVER端常驻后台实现:
用了比较笨的方法,因为怕PHP常驻后台不靠谱,用crontab保证即使出了错断掉也可以重启(悲剧的是crontab最小颗粒是1分钟),然后用shell保证不会重复启动(重复启动会绑定不了端口报错)
check.sh文件 保证脚本不会重复启动
- start()
- {
- c=`ps w -C php|grep $1|wc -l`
- if [ $c -lt 1 ]
- then
- /usr/local/bin/php $1&
- fi
- }
- BASE_PATH=$(dirname `which $0`)
- cd $BASE_PATH
- start server.php