Workerman\Connection\TcpConnection::baseRead PHP Метод

    public function baseRead($socket, $check_eof = true)
    {
        $buffer = fread($socket, self::READ_BUFFER_SIZE);
        // Check connection closed.
        if ($buffer === '' || $buffer === false) {
            if ($check_eof && (feof($socket) || !is_resource($socket) || $buffer === false)) {
                $this->destroy();
                return;
            }
        } else {
            $this->_recvBuffer .= $buffer;
        }
        // If the application layer protocol has been set up.
        if ($this->protocol) {
            $parser = $this->protocol;
            while ($this->_recvBuffer !== '' && !$this->_isPaused) {
                // The current packet length is known.
                if ($this->_currentPackageLength) {
                    // Data is not enough for a package.
                    if ($this->_currentPackageLength > strlen($this->_recvBuffer)) {
                        break;
                    }
                } else {
                    // Get current package length.
                    $this->_currentPackageLength = $parser::input($this->_recvBuffer, $this);
                    // The packet length is unknown.
                    if ($this->_currentPackageLength === 0) {
                        break;
                    } elseif ($this->_currentPackageLength > 0 && $this->_currentPackageLength <= self::$maxPackageSize) {
                        // Data is not enough for a package.
                        if ($this->_currentPackageLength > strlen($this->_recvBuffer)) {
                            break;
                        }
                    } else {
                        echo 'error package. package_length=' . var_export($this->_currentPackageLength, true);
                        $this->destroy();
                        return;
                    }
                }
                // The data is enough for a packet.
                self::$statistics['total_request']++;
                // The current packet length is equal to the length of the buffer.
                if (strlen($this->_recvBuffer) === $this->_currentPackageLength) {
                    $one_request_buffer = $this->_recvBuffer;
                    $this->_recvBuffer = '';
                } else {
                    // Get a full package from the buffer.
                    $one_request_buffer = substr($this->_recvBuffer, 0, $this->_currentPackageLength);
                    // Remove the current package from the receive buffer.
                    $this->_recvBuffer = substr($this->_recvBuffer, $this->_currentPackageLength);
                }
                // Reset the current packet length to 0.
                $this->_currentPackageLength = 0;
                if (!$this->onMessage) {
                    continue;
                }
                try {
                    // Decode request buffer before Emitting onMessage callback.
                    call_user_func($this->onMessage, $this, $parser::decode($one_request_buffer, $this));
                } catch (\Exception $e) {
                    Worker::log($e);
                    exit(250);
                } catch (\Error $e) {
                    Worker::log($e);
                    exit(250);
                }
            }
            return;
        }
        if ($this->_recvBuffer === '' || $this->_isPaused) {
            return;
        }
        // Applications protocol is not set.
        self::$statistics['total_request']++;
        if (!$this->onMessage) {
            $this->_recvBuffer = '';
            return;
        }
        try {
            call_user_func($this->onMessage, $this, $this->_recvBuffer);
        } catch (\Exception $e) {
            Worker::log($e);
            exit(250);
        } catch (\Error $e) {
            Worker::log($e);
            exit(250);
        }
        // Clean receive buffer.
        $this->_recvBuffer = '';
    }