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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the PHP Generics package.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package Generics  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Generics\Socket;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This class provides a basic client socket implementation  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Maik Greubel <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class ServerSocket extends Socket  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Create a new server socket  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Endpoint $endpoint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *            The endpoint to use  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws SocketException In case of creation of socket has failed or socket options could not be set.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct(Endpoint $endpoint)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        parent::__construct($endpoint);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (! @socket_set_option($this->handle, SOL_SOCKET, SO_REUSEADDR, 1)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $code = socket_last_error($this->handle);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            throw new SocketException(socket_strerror($code), array(), $code);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Creates a service at the given endpoint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws SocketException in case of it is not possible to serve due to binding or listening error  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function serve(ServiceCallback $callback)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->bind();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->listen();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $runOn = true;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        while ($runOn) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $clientHandle = @socket_accept($this->handle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if (! is_resource($clientHandle)) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                $code = socket_last_error($this->handle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                throw new SocketException(socket_strerror($code), array(), $code);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $address = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $port = 0;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if (! @socket_getpeername($clientHandle, $address, $port)) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                $code = socket_last_error($clientHandle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                throw new SocketException(socket_strerror($code), array(), $code);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $client = new ClientSocket(new Endpoint($address, $port), $clientHandle);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $runOn = boolval($callback->callback($client));  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Bind the server socket to the given endpoint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws SocketException in case of binding has failed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function bind()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
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                        if (! @socket_bind($this->handle, $this->endpoint->getAddress(), $this->endpoint->getPort())) { | 
            
                            
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                            $code = socket_last_error($this->handle);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            throw new SocketException(socket_strerror($code), array(), $code);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Listen to the binded socket endpoint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws SocketException in case of listening is not possible  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function listen()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (! @socket_listen($this->handle, 5)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $code = socket_last_error($this->handle);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            throw new SocketException(socket_strerror($code), array(), $code);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.