Swoole从入门到入土(19)——WebSocket服务器[文件传输]

要利用WebSocket进行文件传输，我们需要讨论两种情况，分别是：发送方可以是客户端，和 发送方是服务端。

1、发送方是客户端 

1)服务端接收

$server->on('message', function (Swoole\WebSocket\Server $server, $frame) {
    switch ($frame->opcode)
    {
        case 0x09:
            $pongFrame = new Swoole\WebSocket\Frame;
            $pongFrame->opcode = WEBSOCKET_OPCODE_PONG;
            $server->push($frame->fd, $pongFrame);
            echo "pone\n";
            break;
        case 0x08:
            echo "Close frame received: Code {$frame->code} Reason {$frame->reason}\n";
            break;
        case 0x01:
            echo "Text string\n";
            break;
        case 0x02:
            echo "Binary data\n";
            //服务端在这里接收，$frame->data即是客户端发过来的文件二进制数据
            $server->push($frame->fd,$frame->data,WEBSOCKET_OPCODE_BINARY);
            break;
        default:
            $server->push($frame->