php实现socket推送技术的示例
发布:smiling 来源: PHP粉丝网 添加日期:2018-11-04 13:33:36 浏览: 评论:0
在socket出现之前已经有ajax定时请求、长轮询等方案,但都不能满足需求,socket就应用而生了。
socket基本函数socket
总结下常用的socket函数
服务端:socket_create 创建socket设置基本参数
socket_bind 绑定ip和端口号
socket_listen 监听
socket_accept 客户端的连接
socket_read 读取客户端的数据
socket_write 给单独客户端发送数据
socket_close 关闭连接
客户端:socket_create 创建socket设置基本参数
socket_connect 连接socket
socket_write 给服务端发送数据
socket_read 读取服务端数据
socket_close 关闭连接
H5websocket不多说了,上链接
OK,开始贴代码~
--------------分割线
服务端代码:
- <?php
- class WS {
- var $master;
- var $sockets = array();
- var $debug = false;//true为调试模式,输出log日志
- var $handshake = array();
- function __construct($address, $port){
- $this->master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() failed");
- socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) or die("socket_option() failed");
- socket_bind($this->master, $address, $port) or die("socket_bind() failed");
- socket_listen($this->master,20) or die("socket_listen() failed");
- $this->sockets[] = $this->master;
- $this->say("Server Started : ".date('Y-m-d H:i:s'));
- $this->say("Listening on : ".$address." port ".$port);
- $this->say("Master socket : ".$this->master."\n");
- while(true){
- $socketArr = $this->sockets;
- $write = NULL;
- $except = NULL;
- socket_select($socketArr, $write, $except, NULL); //自动选择来消息的socket 如果是握手 自动选择主机
- foreach ($socketArr as $socket){
- if ($socket == $this->master){ //主机
- $client = socket_accept($this->master);
- if ($client < 0){
- $this->log("socket_accept() failed");
- continue;
- } else{
- $this->connect($client);
- }
- } else {
- $bytes = @socket_recv($socket,$buffer,2048,0);
- if ($bytes == 0){
- $this->disConnect($socket);
- }
- else{
- $key = array_search($socket, $this->sockets);
- if (emptyempty($this->handshake) || !isset($this->handshake[$key]) || !$this->handshake[$key]){
- $this->doHandShake($socket, $buffer, $key);
- }
- else{
- $buffer = $this->decode($buffer);
- echo $buffer.PHP_EOL;
- $key = array_search($socket, $this->sockets);
- $arr = $this->sockets;
- array_shift($arr);
- foreach ($arr as $s){
- $this->send($s, $buffer);
- }
- }
- }
- }
- }
- }
- }
- function send($client, $msg){
- $msg = $this->frame($msg);
- socket_write($client, $msg, strlen($msg));
- }
- function connect($socket){
- array_push($this->sockets, $socket);
- $this->say("\n" . $socket . " CONNECTED!");
- $this->say(date("Y-n-d H:i:s"));
- }
- function disConnect($socket){
- $index = array_search($socket, $this->sockets);
- socket_close($socket);
- $this->say($socket . " DISCONNECTED!");
- if ($index >= 0){
- echo 'unset index is:'.PHP_EOL;
- unset($this->sockets[$index]);
- }
- }
- function doHandShake($socket, $buffer, $handKey){
- $this->log("\nRequesting handshake...");
- $this->log($buffer);
- list($resource, $host, $origin, $key) = $this->getHeaders($buffer);
- $this->log("Handshaking...");
- $upgrade = "HTTP/1.1 101 Switching Protocol\r\n" .
- "Upgrade: websocket\r\n" .
- "Connection: Upgrade\r\n" .
- "Sec-WebSocket-Accept: " . $this->calcKey($key) . "\r\n\r\n"; //必须以两个回车结尾
- $this->log($upgrade);
- $sent = socket_write($socket, $upgrade, strlen($upgrade));
- $this->handshake[$handKey]=true;
- $this->log("Done handshaking...");
- return true;
- }
- function getHeaders($req){
- $r = $h = $o = $key = null;
- if (preg_match("/GET (.*) HTTP/" ,$req,$match)) { $r = $match[1]; }
- if (preg_match("/Host: (.*)\r\n/" ,$req,$match)) { $h = $match[1]; }
- if (preg_match("/Origin: (.*)\r\n/" ,$req,$match)) { $o = $match[1]; }
- if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/",$req,$match)) { $key = $match[1]; }
- return array($r, $h, $o, $key);
- }
- function calcKey($key){
- //基于websocket version 13
- $accept = base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
- return $accept;
- }
- function decode($buffer) {
- $len = $masks = $data = $decoded = null;
- $len = ord($buffer[1]) & 127;
- if ($len === 126) {
- $masks = substr($buffer, 4, 4);
- $data = substr($buffer, 8);
- }
- else if ($len === 127) {
- $masks = substr($buffer, 10, 4);
- $data = substr($buffer, 14);
- }
- else {
- $masks = substr($buffer, 2, 4);
- $data = substr($buffer, 6);
- }
- for ($index = 0; $index < strlen($data); $index++) {
- $decoded .= $data[$index] ^ $masks[$index % 4];
- }
- return $decoded;
- }
- function frame($s){
- $a = str_split($s, 125);
- if (count($a) == 1){
- return "\x81" . chr(strlen($a[0])) . $a[0];
- }
- $ns = "";
- foreach ($a as $o){
- $ns .= "\x81" . chr(strlen($o)) . $o;
- }
- return $ns;
- }
- function say($msg = ""){
- echo $msg . "\n";
- }
- function log($msg = ""){
- if ($this->debug){
- echo $msg . "\n";
- } //phpfensi.com
- }
- }
- new WS('localhost', 4000);
客户端代码(H5):
- <html>
- <head>
- <title>demo</title>
- <script src="https://cdn.boot<a href="http://www.111cn.net/cssdiv/css.html" class="anchor" target="_blank">css</a>.com/jquery/1.9.1/jquery.min.js"></script>
- </head>
- <body>
- <input type="text" id="content">
- <input type="button" value="send" id="send">
- <script type="text/javascript">
- var ws = new WebSocket("ws://localhost:4000");
- ws.onopen = function(){
- console.log("握手成功");
- }
- ws.onmessage = function(e){
- console.log("message:" + e.data);
- }
- ws.onerror = function(){
- console.log("error");
- }
- $("#send").click(function(){
- content = $("#content").val();
- console.log(content);
- ws.send(content);
- })
- </script>
- </body>
- </html>
然后执行php demo.php 开启socket(从运维那偷学一招,linux下执行nohup php demo.php &可以在后台执行),浏览器打开多个index.html,就能建立通讯了。
代码解析:
1.属性$sockets数组保存每个accept连接(不知道这么描述对不对);
2.属性$handshake数组保存连接是否在连接状态;
Tags: php推送 socket推送
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