php + js 实现webRtc 1对1聊天
本文使用 GatewayWorker 实现信令
使用WebSocket 与 GatewayWorker 创建信令通讯
废话少说，直接上代码吧
配置好相应代码后请根据本文下面的使用方法进行使用，具体根据你业务进行修改
2. 修改GatewayWorker 配置
修改成 websocket 协议
3. 修改 onConnect中的代码
//创建WebSocket连接后返回 事件event = bindUser给前端，前端通过client_id 绑定uid
$data['data'] = [
'client_id' => $client_id
];
$data['event'] = 'bindUser';
Gateway::sendToClient($client_id, json_encode($data));
4. 修改 onMessage
$request = json_decode($data,true);
$data = $request['data'];
$return_data = [
'status' => 200,
'msg' => '成功',
'data' => $data,
'event' => $request['cmd'], //怎么传过来怎么返回， 前端事件通过事件创建通讯
'from_uid' => $request['from_uid'], //发送人uid
'to_uid' => $request['to_uid'] //接收人uid
];
switch ($request['cmd']) {
case 'bindUser': //绑定uid
Gateway::bindUid($client_id, $request['from_uid']);
$return_data['event'] = 'bindUserCallback';
$return_data['msg'] = '绑定uid成功';
$receive_uid = $request['from_uid'];
break;
default:
$receive_uid = $request['to_uid'];
break;
}
//发送人
Gateway::sendToUid($receive_uid, json_encode($return_data));
到此为止 php 代码就写完了
5. 前端代码 首先我们先了解一下webRtc 连接的原理 大概就是这样
下面是前端代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div{
width: 200px;
height: 200px;
border: 1px solid red;
}
video{
width: 100%;
height: 100%;
}
.call{
line-height: 100px;
width: 100px;
height: 100px;
border: 1px solid red;
display: none;
}
</style>
</head>
<body>
<div><video id="localVideo" autoplay></video></div>
<div><video id="remoteVideo" autoplay class="hidden"></video></div>
<button onclick="call()">呼叫</button>
<div class="call">
<button onclick="received()">接听</button>
<button onclick="refuse()">拒绝</button>
</div>
<script src="./jquery-3.6.0.min.js"></script>
<script>
var ws_url = '';
var localVideo = document.getElementById('localVideo');
var remoteVideo = document.getElementById('remoteVideo');
var from_uid = getUrlParam('from_uid'); //自己的uid
var to_uid = getUrlParam('to_uid'); // 好友的uid
var ws = new WebSocket(ws_url);
ws.onopen = function(){
console.log('创建WebSocket成功');
};
ws.onmessage = function(e){
var data = JSON.parse(e.data);
console.log(data)
// eval(package.event+'(' + JSON.stringify(package.data) + ')')
switch(data.event){
case 'bindUser':
send('bindUser', {});
break;
case 'bindUserCallback':
console.log('uid绑定成功！')
break;
case 'videoChat':
let type = data.data.type;
if(data.status != 200){
alert(data.msg);
}
!to_uid ? to_uid = data.to_uid : '';
data = data.data
//收到呼叫
if(type == 'call'){
called();
}else if(type == 'received'){
webRtc.createOffer(function(data){
console.log('呼叫方创建offer');
send('videoChat',{data: data,type: 'offer'})
})
}else if(type == 'candidate'){
console.log('保存candidate');
webRtc.addIceCandidate(data.data)
}else if(type == 'offer'){
console.log('被呼叫方收到offer，创建answer');
webRtc.createAnswer(data.data,function(data){
send('videoChat',{data: data,type: 'answer'})
});
}else if(type == 'answer'){
console.log('呼叫方保存answer');
webRtc.addAnswer(data.data);
}
break;
}
}
function send(cmd,data){
ws.send(JSON.stringify({
cmd: cmd,
data: data,
from_uid: from_uid,
to_uid: to_uid
}))
}
//呼叫
function call(){
media.call()
if(!to_uid){
alert('接收人不能为空！');
return;
}
send('videoChat',{type: 'call'});
}
function called(){
console.log('收到呼叫')
$('.call').show();
}
function received(){
media.called();
console.log('接听')
}
function refuse(){
send('call',{type: 'refuse'});
to_uid ? to_uid = 0 : '';
console.log('拒绝')
}
let media = {
candidate: {},
offer: {},
//呼叫方
call(){
let that = this;
that.authorize(function(){
webRtc.createRtc(function(data){
console.log('呼叫方创建连接成功')
},function(data){
send('videoChat',{data: data,type: 'candidate'});
});
})
},
//被呼叫 - 接听
called(){
let that = this;
that.authorize(function(){
webRtc.createRtc(function(data){
console.log('被呼叫创建连接成功')
send('videoChat',{type: 'received'});
},function(data){
send('videoChat',{data: data, type: 'candidate'} );
});
})
},
authorize(c){
navigator.mediaDevices.getUserMedia({
audio: true,
video: true
}).then(function (stream) {
localVideo.srcObject = stream;
webRtc.stream = stream;
c();
localVideo.addEventListener('loadedmetadata', function () {
console.log('加载视频流');
});
}).catch(function (e) {
alert(e);
});
}
}
let webRtc = {
stream: {},
pc: {},
createRtc(c,candidataCallback){
let that = this;
var configuration = {
iceServers: [{
urls: 'stun:stun.xten.com'
}]
};
let pc = new RTCPeerConnection(configuration);
c(pc);
pc.onicecandidate = function (event) {
if (event.candidate) {
candidataCallback(event.candidate)
}
};
try{
pc.addStream(that.stream);
}catch(e){
var tracks = that.stream.getTracks();
for(var i=0;i<tracks.length;i++){
pc.addTrack(tracks[i], that.stream);
}
}
pc.onaddstream = function (e) {
console.log('回调视频流');
remoteVideo.srcObject = e.stream;
};
this.pc = pc
},
//保存Candidate
addIceCandidate(data){
this.pc.addIceCandidate(new RTCIceCandidate(data), function(){}, function(e){alert(e);});
},
//创建offer
createOffer(c){
let pc = this.pc
pc.createOffer({
offerToReceiveAudio: 1,
offerToReceiveVideo: 1
}).then(function (desc) {
pc.setLocalDescription(desc).then(
function () {
c(pc.localDescription);
}
).catch(function (e) {
alert(e);
});
}).catch(function (e) {
alert(e);
});
},
//根据offer 创建 answer
createAnswer(data,c){
let pc = this.pc
let answer = 0;
pc.setRemoteDescription(new RTCSessionDescription(data), function(){
if (answer == 0) {
pc.createAnswer(function (desc) {
pc.setLocalDescription(desc, function () {
c(pc.localDescription);
}, function(e){
alert(e);
});
}
,function(e){
alert(e);
});
answer = 1;
}
}, function(e){
alert(e);
});
},
addAnswer(data){
this.pc.setRemoteDescription(new RTCSessionDescription(data),function(){}, function(e){
alert(e);
});
}
}
function getUrlParam(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if (r != null) return unescape(r[2]);
return null;
}
</script>
</body>
</html>
设置WebSocket 连接地址 GatewayWorker 默认端口是8282
winwods 双击下面文件运行 ，liunx 进入下面这个目录 执行 php start.php start -d 以守护进程方式运行
注意！注意！注意！
同个电脑不同的浏览器不能同时打开摄像头
所以这里建议放到服务器上，并设置wss连接，否则不能使用
修改liunx 配置文件，添加下面代码
location /wss/ {
proxy_pass http://127.0.0.1:8282;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
}
然后WebSocket 的地址为服务器域名就行
使用方法：
1. 发送方 https://域名/index.html?from_uid=1&to_uid=2
2. 接收方 https://域名/index.html?from_uid=2
3. 发送方点击呼叫，接收方会出现接口拒绝按钮，点击接听既可创建通信
