36 lines
1.6 KiB
PHP
36 lines
1.6 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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class BlockingFallbackResolver implements Resolver
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{
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public function resolve(string $name, int $typeRestriction = null) : Promise
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{
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if (!\in_array($typeRestriction, [Record::A, null], \true)) {
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return new Failure(new DnsException("Query for '{$name}' failed, because loading the system's DNS configuration failed and querying records other than A records isn't supported in blocking fallback mode."));
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}
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return $this->query($name, Record::A);
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}
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public function query(string $name, int $type) : Promise
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{
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if ($type !== Record::A) {
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return new Failure(new DnsException("Query for '{$name}' failed, because loading the system's DNS configuration failed and querying records other than A records isn't supported in blocking fallback mode."));
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}
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$result = \gethostbynamel($name);
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if ($result === \false) {
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return new Failure(new DnsException("Query for '{$name}' failed, because loading the system's DNS configuration failed and blocking fallback via gethostbynamel() failed, too."));
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}
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if ($result === []) {
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return new Failure(new NoRecordException("No records returned for '{$name}' using blocking fallback mode."));
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}
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$records = [];
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foreach ($result as $record) {
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$records[] = new Record($record, Record::A, null);
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}
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return new Success($records);
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}
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}
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