1 | <?php |
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2 | |||
3 | |||
4 | namespace Pheanstalk\Socket; |
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5 | |||
6 | use Pheanstalk\Contract\SocketInterface; |
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7 | use Pheanstalk\Exception\ConnectionException; |
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8 | use Pheanstalk\Exception\SocketException; |
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9 | |||
10 | /** |
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11 | * A Socket implementation using the Sockets extension |
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12 | */ |
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13 | class SocketSocket implements SocketInterface |
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14 | { |
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15 | /** @var resource */ |
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16 | private $socket; |
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17 | |||
18 | 27 | public function __construct( |
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19 | string $host, |
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20 | int $port, |
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21 | int $connectTimeout |
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22 | ) { |
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23 | 27 | if (!extension_loaded('sockets')) { |
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24 | throw new \Exception('Sockets extension not found'); |
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25 | } |
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26 | |||
27 | 27 | $this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); |
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28 | 27 | if ($this->socket === false) { |
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29 | $this->throwException(); |
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30 | } |
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31 | |||
32 | $timeout = [ |
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33 | 27 | 'sec' => 0, |
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34 | 'usec' => 100 |
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35 | ]; |
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36 | |||
37 | 27 | socket_set_option($this->socket, SOL_TCP, SO_KEEPALIVE, 1); |
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38 | 27 | socket_set_option($this->socket, SOL_SOCKET,SO_SNDTIMEO, $timeout); |
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39 | 27 | socket_set_option($this->socket, SOL_SOCKET,SO_RCVTIMEO, $timeout); |
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40 | |||
41 | 27 | $timeout = microtime(true) + $connectTimeout; |
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42 | 27 | $address = gethostbyname($host); |
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43 | |||
44 | 27 | while (microtime(true) < $timeout) { |
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45 | 27 | socket_clear_error($this->socket); |
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46 | 27 | if (@socket_connect($this->socket, $address, $port)) { |
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47 | 26 | return; |
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48 | }; |
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49 | 1 | $error = socket_last_error($this->socket); |
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50 | 1 | if (!($error === SOCKET_EALREADY || $error === SOCKET_EINPROGRESS)) { |
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51 | 1 | break; |
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52 | } |
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53 | } |
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54 | |||
55 | 1 | throw new ConnectionException($error, socket_strerror($error)); |
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56 | } |
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57 | |||
58 | /** |
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59 | * Writes data to the socket. |
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60 | * |
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61 | * @param string $data |
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62 | * |
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63 | * @return void |
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64 | */ |
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65 | 25 | public function write(string $data): void |
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66 | { |
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67 | 25 | $this->checkClosed(); |
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68 | 25 | while (!empty($data)) { |
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69 | 25 | $written = socket_write($this->socket, $data); |
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70 | 25 | if ($written === false) { |
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71 | $this->throwException(); |
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72 | } |
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73 | 25 | $data = substr($data, $written); |
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74 | } |
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75 | } |
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76 | |||
77 | private function throwException() |
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78 | { |
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79 | $error = socket_last_error($this->socket); |
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80 | throw new SocketException(socket_strerror($error), $error); |
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81 | } |
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82 | |||
83 | 25 | private function checkClosed() |
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84 | { |
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85 | 25 | if (!isset($this->socket)) { |
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86 | throw new SocketException('The connection was closed'); |
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87 | } |
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88 | } |
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89 | |||
90 | /** |
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91 | * Reads up to $length bytes from the socket. |
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92 | * |
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93 | * @return string |
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94 | */ |
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95 | 24 | public function read(int $length): string |
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96 | { |
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97 | 24 | $this->checkClosed(); |
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98 | |||
99 | 24 | $buffer = ''; |
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100 | 24 | while (mb_strlen($buffer, '8BIT') < $length) { |
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101 | 24 | $result = socket_read($this->socket, $length - mb_strlen($buffer, '8BIT')); |
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102 | 24 | if ($result === false) { |
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103 | $this->throwException(); |
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104 | } |
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105 | 24 | $buffer .= $result; |
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106 | } |
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107 | |||
108 | 24 | return $buffer; |
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109 | } |
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110 | |||
111 | 25 | public function getLine(): string |
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112 | { |
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113 | 25 | $this->checkClosed(); |
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114 | |||
115 | 25 | $buffer = ''; |
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116 | // Reading stops at \r or \n. In case it stopped at \r we must continue reading. |
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117 | 25 | while(substr($buffer, -1, 1) !== "\n") { |
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118 | 25 | $result = socket_read($this->socket, 1024, PHP_NORMAL_READ); |
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119 | 25 | if ($result === false) { |
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120 | $this->throwException(); |
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121 | } |
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122 | 25 | $buffer .= $result; |
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123 | } |
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124 | |||
125 | |||
126 | |||
127 | 25 | return rtrim($buffer); |
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128 | } |
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129 | |||
130 | /** |
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131 | * Disconnect the socket; subsequent usage of the socket will fail. |
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132 | */ |
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133 | 1 | public function disconnect(): void |
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134 | { |
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135 | 1 | $this->checkClosed(); |
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136 | 1 | socket_close($this->socket); |
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137 | 1 | unset($this->socket); |
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138 | } |
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139 | } |