原理改天总结一下吧，直接上源码：
下载库：http://pan.baidu.com/s/1qX2u45A
然后导入到项目。
添加依赖库：
Your .app must be linked against the following frameworks/dylibs libicucore.dylib CFNetwork.framework Security.framework Foundation.framework
修改库里边所在PCH文件的地址引用：Prefix Header-> SRWebSocket/SocketRocket-Prefix.pch
客户端：
//
// ViewController.m
// WebsocketDemo
//
// Created by skyzizhu on 16/1/5.
// Copyright (c) 2016年 skyzizhu. All rights reserved.
//
#import "ViewController.h"
#import "SRWebSocket.h"
#define WindowWidth [UIScreen mainScreen].bounds.size.width
#define WindowHeight [UIScreen mainScreen].bounds.size.height
@interface ViewController ()<SRWebSocketDelegate>
@property (nonatomic,strong) SRWebSocket *webSocket;
@property (nonatomic,strong) NSString *socketConnectURL;
@end
@implementation ViewController
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
_webSocket.delegate = nil;
[_webSocket close];
_webSocket = nil;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor orangeColor];
UITextField *input = [[UITextField alloc]initWithFrame:CGRectMake(20, 100, WindowWidth - 40, 70)];
input.tag = 6440;
input.placeholder = @"请输入链接地址或者发送内容";
input.borderStyle = UITextBorderStyleLine;
[self.view addSubview:input];
UIButton *send = [[UIButton alloc]initWithFrame:CGRectMake(50, 200, WindowWidth - 100, 50)];
send.backgroundColor = [UIColor grayColor];
[send setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[send setTitle:@"连接/发送" forState:UIControlStateNormal];
[self.view addSubview:send];
[send addTarget:self action:@selector(connectOrSendAction:) forControlEvents:UIControlEventTouchUpInside];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)connectOrSendAction:(UIButton *)obj
{
UITextField *currentInput = (UITextField *)[self.view viewWithTag:6440];
if(currentInput.text.length <= 0 || (_webSocket != nil && [_webSocket readyState] == SR_CONNECTING)) return;
if([_webSocket readyState] != SR_OPEN){
//@"ws://192.168.1.8:8000/"
self.socketConnectURL = currentInput.text;
[self connectServer];
}else{
[_webSocket send:currentInput.text];
}
}
- (void)connectServer;
{
if(_webSocket.delegate != nil){
_webSocket.delegate = nil;
}
if([_webSocket readyState] < SR_CLOSING){
[_webSocket close];
}
_webSocket = [[SRWebSocket alloc] initWithURLRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.socketConnectURL]]];
_webSocket.delegate = self;
self.title = @"Opening Connection...";
[_webSocket open];
}
#pragma websocket delegate
- (void)webSocketDidOpen:(SRWebSocket *)webSocket;
{
//连接成功之后调用
NSLog(@"Websocket Connected");
}
- (void)webSocket:(SRWebSocket *)webSocket didFailWithError:(NSError *)error;
{
//连接出现错误时候调用的代理
NSLog(@":( Websocket Failed With Error %@", error);
_webSocket = nil;
}
- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message
{
//成功接受消息之后的代理
NSLog(@"Received \"%@\"", message);
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"收到消息" message:message delegate:nil cancelButtonTitle:nil otherButtonTitles:@"Enter", nil];
[alert show];
}
- (void)webSocket:(SRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean;
{
//webSocket已经关闭之后执行的代理
NSLog(@"WebSocket closed");
self.title = @"Connection Closed! (see logs)";
_webSocket = nil;
}
- (void)webSocket:(SRWebSocket *)webSocket didReceivePong:(NSData *)pongPayload;
{
NSLog(@"收到服务器返回异常的代理方法");
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
服务器端：websocket.class.php 连接类
<?php
/*
创建类websocket($config);
$config结构:
$config=array(
'address'=>'192.168.0.200',//绑定地址
'port'=>'8000',//绑定端口
'event'=>'WSevent',//回调函数的函数名
'log'=>true,//命令行显示记录
);
回调函数返回数据格式
function WSevent($type,$event)
$type字符串 事件类型有以下三种
in 客户端进入
out 客户端断开
msg 客户端消息到达
均为小写
$event 数组
$event['k']内置用户列表的userid;
$event['sign']客户标示
$event['msg']收到的消息 $type='msg'时才有该信息
方法:
run()运行
search(标示)遍历取得该标示的id
close(标示)断开连接
write(标示,信息)推送信息
idwrite(id,信息)推送信息
属性:
$users 客户列表
结构:
$users=array(
[用户id]=>array('socket'=>[标示],'hand'=[是否握手-布尔值]),
[用户id]=>arr.....
)
*/
class websocket{
public $log;
public $event;
public $signets;
public $users;
public $master;
public function __construct($config){
if (substr(php_sapi_name(), 0, 3) !== 'cli') {
die("请通过命令行模式运行!");
}
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
$this->event = $config['event'];
$this->log = $config['log'];
$this->master=$this->WebSocket($config['address'], $config['port']);
$this->sockets=array('s'=>$this->master);
}
function WebSocket($address,$port){
$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);
socket_bind($server, $address, $port);
socket_listen($server);
$this->log('开始监听: '.$address.' : '.$port);
return $server;
}
function run(){
while(true){
$changes=$this->sockets;
@socket_select($changes,$write=NULL,$except=NULL,NULL);
foreach($changes as $sign){
if($sign==$this->master){
$client=socket_accept($this->master);
$this->sockets[]=$client;
$user = array(
'socket'=>$client,
'hand'=>false,
);
$this->users[] = $user;
$k=$this->search($client);
$eventreturn = array('k'=>$k,'sign'=>$sign);
$this->eventoutput('in',$eventreturn);
}else{
$len=socket_recv($sign,$buffer,2048,0);
$k=$this->search($sign);
$user=$this->users[$k];
if($len<7){
$this->close($sign);
$eventreturn = array('k'=>$k,'sign'=>$sign);
$this->eventoutput('out',$eventreturn);
continue;
}
if(!$this->users[$k]['hand']){//没有握手进行握手
$this->handshake($k,$buffer);
}else{
$buffer = $this->uncode($buffer);
$eventreturn = array('k'=>$k,'sign'=>$sign,'msg'=>$buffer);
$this->eventoutput('msg',$eventreturn);
}
}
}
}
}
function search($sign){//通过标示遍历获取id
foreach ($this->users as $k=>$v){
if($sign==$v['socket'])
return $k;
}
return false;
}
function close($sign){//通过标示断开连接
$k=array_search($sign, $this->sockets);
socket_close($sign);
unset($this->sockets[$k]);
unset($this->users[$k]);
}
function handshake($k,$buffer){
$buf = substr($buffer,strpos($buffer,'Sec-WebSocket-Key:')+18);
$key = trim(substr($buf,0,strpos($buf,"\r\n")));
$new_key = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true));
$new_message = "HTTP/1.1 101 Switching Protocols\r\n";
$new_message .= "Upgrade: websocket\r\n";
$new_message .= "Sec-WebSocket-Version: 13\r\n";
$new_message .= "Connection: Upgrade\r\n";
$new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";
socket_write($this->users[$k]['socket'],$new_message,strlen($new_message));
$this->users[$k]['hand']=true;
return true;
}
function uncode($str){
$mask = array();
$data = '';
$msg = unpack('H*',$str);
$head = substr($msg[1],0,2);
if (hexdec($head{1}) === 8) {
$data = false;
}else if (hexdec($head{1}) === 1){
$mask[] = hexdec(substr($msg[1],4,2));
$mask[] = hexdec(substr($msg[1],6,2));
$mask[] = hexdec(substr($msg[1],8,2));
$mask[] = hexdec(substr($msg[1],10,2));
$s = 12;
$e = strlen($msg[1])-2;
$n = 0;
for ($i=$s; $i<= $e; $i+= 2) {
$data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2)));
$n++;
}
}
return $data;
}
function code($msg){
$msg = preg_replace(array('/\r$/','/\n$/','/\r\n$/',), '', $msg);
$frame = array();
$frame[0] = '81';
$len = strlen($msg);
$frame[1] = $len<16?'0'.dechex($len):dechex($len);
$frame[2] = $this->ord_hex($msg);
$data = implode('',$frame);
return pack("H*", $data);
}
function ord_hex($data) {
$msg = '';
$l = strlen($data);
for ($i= 0; $i<$l; $i++) {
$msg .= dechex(ord($data{$i}));
}
return $msg;
}
function idwrite($id,$t){//通过id推送信息
if(!$this->users[$id]['socket']){return false;}//没有这个标示
$t=$this->code($t);
return socket_write($this->users[$id]['socket'],$t,strlen($t));
}
function write($k,$t){//通过标示推送信息
$t=$this->code($t);
return socket_write($k,$t,strlen($t));
}
function eventoutput($type,$event){//事件回调
call_user_func($this->event,$type,$event);
}
function log($t){//控制台输出
if($this->log){
$t=$t."\r\n";
fwrite(STDOUT, iconv('utf-8','gbk//IGNORE',$t));
}
}
}
<?
include 'websocket.class.php';
$config=array(
'address'=>'192.168.1.8',
'port'=>'8000',
'event'=>'WSevent',//回调函数的函数名
'log'=>true,
);
$websocket = new websocket($config);
$websocket->run();
function WSevent($type,$event){
global $websocket;
if('in'==$type){
$websocket->log('客户进入id:'.$event['k']);
}elseif('out'==$type){
$websocket->log('客户退出id:'.$event['k']);
}elseif('msg'==$type){
$websocket->log($event['k'].'消息:'.$event['msg']);
roboot($event['sign'],$event['msg']);
}
}
function roboot($sign,$t){
global $websocket;
switch ($t)
{
case 'hello':
$show='hello,for websocket';
break;
case 'name':
$show='my name is server';
break;
case 'time':
$show='current time:'.date('Y-m-d H:i:s');
break;
case 'bye':
$show='bye bye ';
$websocket->write($sign,'server say:'.$show);
$websocket->close($sign);
return;
break;
case 'no':
$array = array('oh no','yes or no','this is your message no no no!');
$show = $array[rand(0,2)];
break;
default:
$show='how do you do？.';
}
$websocket->write($sign,'server alert message:'.$show);
}
?>
运行：$ php -q server.php
原文原库：http://www.oschina.net/code/snippet_1029305_22256