Webrtc服务器搭建一对一(公网/HTTPS)

一、基础资源

• 操作系统：centos 7.3
• 服务器IP：内网（192.168.10.17），外网（124.160.xxx.xxx）
• 域名：webrtc.xxx.com （带https证书）
• 防火墙开放端口：tcp/udp 3478 3480-3500 8080 8089 443
• 内网域名绑定：/etc/hosts  => 192.168.10.17  webrtc.xxx.com （由于本机内部访问外网IP不通）

二、域名证书

• mkdir /cert
• 将域名证书放在/cert目录下，分别命名为cert.pem，key.pem
• 如果是domain.crt，domain.key 可以根据以下命令生成pem证书
• openssl rsa -in server.key -text > key.pem
• openssl x509 -inform PEM -in server.crt > cert.pem

三、依赖包安装

• yum -y install  java-1.8.0-openjdk-devel java-1.8.0-openjdk
• yum -y install openssl-devel libevent libevent-devel
• yum -y install nodejs npm python python-webtest golang php-fpm nginx
• npm -g install grunt-cli

四、环境配置

a. go 工作目录配置

• mkdir -p /root/webrtc/goWorkspace
• vim /etc/profile
• export GOPATH=/root/webrtc/goWorkspace
• 生效  source /etc/profile

b. google app engine

• cd /root/webrtc
• wget https://storage.googleapis.com/appengine-sdks/featured/google_appengine_1.9.50.zip
• unzip google_appengine_1.9.50.zip
• 添加到系统环境中去 /etc/profile
• export PATH=$PATH:/root/webrtc/google_appengine
• 生效 source /etc/profile

c. 信令服务器(Collider Server)

• mkdir -p /root/webrtc/goWorkspace/src
• cd /root/webrtc/
• 下载apprtc源码  git clone https: //github.com/webrtc/apprtc.git
• 将apprtc目录下的collider  collidermain collidertest link 到 go 工作目录中的src中去
• ln -sf /root/webrtc/apprtc/src/collider/collider $GOPATH/src/
• ln -sf /root/webrtc/apprtc/src/collider/collidermain $GOPATH/src/
• ln -sf /root/webrtc/apprtc/src/collider/collidertest $GOPATH/src/

d. STUN\TURN服务器

• cd /root/webrtc
• wget http://coturn.net/turnserver/v4.5.0.7/turnserver-4.5.0.7.tar.gz
• tar xvfz turnserver-4.5.0.7.tar.gz

五、安装和启动相关软件

a.搭建房间服务器(Room Server)

• cd /root/webrtc/apprtc
• npm install
• vim /root/webrtc/apprtc/src/app_engine/constants.py

TURN_BASE_URL = 'https://webrtc.xxx.com';
 TURN_URL_TEMPLATE = '%s/turn.php?username=%s&key=%s';
 CEOD_KEY = 'inesadt'

ICE_SERVER_BASE_URL = 'https://webrtc.xxx.com';
ICE_SERVER_URL_TEMPLATE = '%s/iceconfig.php?key=%s';

ICE_SERVER_API_KEY = os.environ.get('ICE_SERVER_API_KEY')

WSS_INSTANCE_HOST_KEY = 'webrtc.xxx.com:8089'
WSS_INSTANCE_NAME_KEY = 'vm_name'
WSS_INSTANCE_ZONE_KEY = 'zone'
WSS_INSTANCES = [{
  WSS_INSTANCE_HOST_KEY: 'webrtc.xxx.com:8089',
  WSS_INSTANCE_NAME_KEY: 'wsserver-std',
  WSS_INSTANCE_ZONE_KEY: 'us-central1-a'
  }, {
  WSS_INSTANCE_HOST_KEY: 'webrtc.xxx.com:8089',
  WSS_INSTANCE_NAME_KEY: 'wsserver-std-2',
  WSS_INSTANCE_ZONE_KEY: 'us-central1-f'
}]

• cd /root/webrtc/apprtc
• grunt build
• 运行房间服务器（room server)
• nohup dev_appserver.py –host=webrtc.xxx.com /root/webrtc/apprtc/out/app_engine &

b.搭建信令服务器(Collider Server)

• cd /root/webrtc/goWorkspace/src
• go get collidermain （有错误，自己google解决一下）
• go install collidermain
• 启动信令服务器
• nohup /root/webrtc/goWorkspace/bin/collidermain -port=8089 -tls=true -room-server=双引号https://webrtc.xxx.com双引号 &

c.搭建TURN服务器

• cd /root/webrtc/turnserver-4.5.0.7
• ./configure
• make install
• vim /etc/turnserver.conf

listening-device=bond0
 listening-port=3478
 relay-device=bond0
 min-port=3480
 max-port=3500
 Verbose
 fingerprint
 lt-cred-mech
 use-auth-secret
 static-auth-secret=inesadt  #此处要和房间服务器配置时constants.py文件中的CODE_KEY保持一致。
 user=inesadt:0x42ef823e9766b4bd749481cb07b2359f
 user=inesadt:inesadt
 realm=webrtc.xxx.com
 stale-nonce
 cert=/cert/cert.pem
 pkey=/cert/key.pem
 no-loopback-peers
 no-multicast-peers
 mobility
 no-cli

• 上述文件中 0x42ef823e9766b4bd749481cb07b2359f的生成方法：
• turnadmin -k -u inesadt -r webrtc.xxx.com -p inesadt
• -k 表示生成一个long-term credential key
• -u 表示用户名
• -p 表示密码
• -r 表示Realm域
• 最终生成的命令如下：
• /root/webrtc/turnserver-4.5.0.7/bin/turnadmin -k -u inesadt -r north.gov -p inesadt
• 启动turnserver
• nohup /root/webrtc/turnserver-4.5.0.7/bin/turnserver -v /etc/turnserver.conf &

d. nginx代理服务配置

• vim /etc/nginx/conf.d/webrtc.conf

upstream roomserver {
     server 192.168.10.17:8080;
     keepalive 60;
 }

server {
 listen 443 ssl;
 server_name webrtc.xxx.com; 
 ssl_certificate /etc/nginx/ssl/webrtc.xxx.com.crt;
 ssl_certificate_key /etc/nginx/ssl/webrtc.xxx.com.key;
 charset     utf-8;
 root /var/www/html;
 index index.php index.html index.htm;
 access_log  /var/log/nginx/access.log  main;
 location ~ .php$ {
     fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;
     fastcgi_index index.php;
     include fastcgi_params;
 }
 location / {
     proxy_pass http://roomserver$request_uri;
     proxy_set_header Host $host;
 }
}

e. php-fpm服务配置

• vim /etc/php-fpm.d/www.conf

#增加一行
listen = /var/run/php-fpm/php-fpm.sock

f.在/var/www/html/目录下添加turn.php文件和iceconfig.php文件

• vim /var/www/html/turn.php

<?php
 $request_username = $_GET["username"];
 if(empty($request_username)) {
     echo "username == null";
     exit;
 }
 $request_key = $_GET["key"];
 $time_to_live = 600;
 $timestamp = time() + $time_to_live;//失效时间 
 $response_username = $timestamp.":".$_GET["username"];
 $response_key = $request_key;
 if(empty($response_key))
     $response_key = "inesadt"; //constants.py中CEOD_KEY 
 $response_password = getSignature($response_username, $response_key);
 $jsonObj = new Response();
 $jsonObj->username = $response_username;
 $jsonObj->password = $response_password;
 $jsonObj->ttl = 86400;
 //此处需配置自己的服务器
 $jsonObj->uris= array("stun:webrtc.xxx.com:3478","turn:webrtc.xxx.com:3478?transport=udp","turn:webrtc.xxx.com?transport=tcp");
 echo json_encode($jsonObj);

 function getSignature($str, $key) {
     $signature = "";
     if (function_exists('hash_hmac')) {
         $signature = base64_encode(hash_hmac("sha1", $str, $key, true));
     } else {
         $blocksize = 64;
         $hashfunc = 'sha1';
         if (strlen($key) > $blocksize) {
             $key = pack('H', $hashfunc($key));     
         }     
         $key = str_pad($key, $blocksize, chr(0x00));     
         $ipad = str_repeat(chr(0x36), $blocksize);     
         $opad = str_repeat(chr(0x5c), $blocksize);     
         $hmac = pack(     
                 'H', $hashfunc(($key ^ $opad) .pack(
                 'H*', $hashfunc(($key ^ $ipad) . $str)
                 )));
         $signature = base64_encode($hmac);
     }
     return $signature;
 }
 class Response {         
    public $username = "";         
    public $password = "";         
    public $ttl = "";         
    public $uris = array(""); 
 }
?>

• vim /var/www/html/iceconfig.php

<?php
  $request_username = "inesadt"; //配置成自己的turn服务器用户名
  if(empty($request_username)) {
    echo "username == null";
    exit;
  }
  $request_key = "inesadt"; //配置成自己的turn服务器密码
  $time_to_live = 600;
  $timestamp = time() + $time_to_live;//失效时间 
  $response_username = $timestamp.":".$_GET["username"];
  $response_key = $request_key;
  if(empty($response_key))
    $response_key = "inesadt";//constants.py中CEOD_KEY 
  $response_password = getSignature($response_username, $response_key);
  $arrayObj = array();
  $arrayObj[0]['username'] = $response_username;
  $arrayObj[0]['credential'] = $response_password;
  //配置成自己的stun/turn服务器
  $arrayObj[0]['urls'][0] = "stun:webrtc.xxx.com:3478";
  $arrayObj[0]['urls'][1] = "turn:webrtc.xxx.com:3478?transport=tcp";
  $arrayObj[0]['uris'][0] = "stun:webrtc.xxx.com:3478";
  $arrayObj[0]['uris'][1] = "turn:webrtc.xxx.com:3478?transport=tcp";
  $jsonObj = new Response();
  $jsonObj->lifetimeDuration = "300.000s";
  $jsonObj->iceServers = $arrayObj;
  echo json_encode($jsonObj);

  function getSignature($str, $key) {
        $signature = "";
        if (function_exists('hash_hmac')) {
            $signature = base64_encode(hash_hmac("sha1", $str, $key, true));
        } else {
            $blocksize = 64;
            hashfunc = 'sha1';
           if (strlen($key) > $blocksize) {
               $key = pack('H', $hashfunc($key));
           } 
          $key = str_pad($key, $blocksize, chr(0x00));
          $ipad = str_repeat(chr(0x36), $blocksize); 
          $opad = str_repeat(chr(0x5c), $blocksize); 
          $hmac = pack( 
                       'H', $hashfunc(($key ^ $opad) . pack(
                      'H*', $hashfunc(($key ^ $ipad) . $str)
           )));
      $signature = base64_encode($hmac);
      }
      return $signature;
  }
  class Response {
        public $lifetimeDuration = "";
        public $iceServers = array("");
  }
 ?>

• 重启生效
• systemctl restart php-fpm
• systemctl restart nginx

六、两个pc之间测试

第一台访问 https://webrtc.xxx.com 并加入一个房间，然后将房间号（026038717）发给另外一台pc进行访问

第二台pc 浏览器访问https://webrtc.xxx.com/r/026038717

测试成功

本文参考：
  https://blog.csdn.net/gladsnow/article/details/77900578

  https://juejin.im/post/5bec4a3051882551236e7b35