71 lines
2.4 KiB
PHP
71 lines
2.4 KiB
PHP
<?php
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namespace WP_Ultimo\Dependencies\Amp\Dns;
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use WP_Ultimo\Dependencies\Amp\Failure;
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use WP_Ultimo\Dependencies\Amp\Promise;
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use WP_Ultimo\Dependencies\Amp\Success;
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use function WP_Ultimo\Dependencies\Amp\call;
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class HostLoader
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{
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private $path;
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public function __construct(string $path = null)
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{
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$this->path = $path ?? $this->getDefaultPath();
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}
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private function getDefaultPath() : string
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{
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return \stripos(\PHP_OS, "win") === 0 ? 'C:\\Windows\\system32\\drivers\\etc\\hosts' : '/etc/hosts';
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}
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protected function readFile(string $path) : Promise
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{
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\set_error_handler(function (int $errno, string $message) use($path) {
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throw new ConfigException("Could not read configuration file '{$path}' ({$errno}) {$message}");
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});
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try {
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// Blocking file access, but this file should be local and usually loaded only once.
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$fileContent = \file_get_contents($path);
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} catch (ConfigException $exception) {
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return new Failure($exception);
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} finally {
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\restore_error_handler();
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}
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return new Success($fileContent);
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}
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public function loadHosts() : Promise
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{
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return call(function () {
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try {
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$contents = (yield $this->readFile($this->path));
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} catch (ConfigException $exception) {
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return [];
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}
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$data = [];
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$lines = \array_filter(\array_map("trim", \explode("\n", $contents)));
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foreach ($lines as $line) {
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if ($line[0] === "#") {
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// Skip comments
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continue;
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}
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$parts = \preg_split('/\\s+/', $line);
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if (!($ip = @\inet_pton($parts[0]))) {
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continue;
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} elseif (isset($ip[4])) {
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$key = Record::AAAA;
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} else {
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$key = Record::A;
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}
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for ($i = 1, $l = \count($parts); $i < $l; $i++) {
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try {
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$normalizedName = normalizeName($parts[$i]);
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$data[$key][$normalizedName] = $parts[0];
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} catch (InvalidNameException $e) {
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// ignore invalid entries
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}
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}
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}
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return $data;
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});
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}
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}
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