|
1
|
|
|
<?php |
|
2
|
|
|
namespace RemotelyLiving\PHPDNS\Resolvers; |
|
3
|
|
|
|
|
4
|
|
|
use Psr\Log\LoggerAwareInterface; |
|
5
|
|
|
use Psr\Log\LoggerInterface; |
|
6
|
|
|
use RemotelyLiving\PHPDNS\Entities\DNSRecord; |
|
7
|
|
|
use RemotelyLiving\PHPDNS\Entities\DNSRecordCollection; |
|
8
|
|
|
use RemotelyLiving\PHPDNS\Entities\DNSRecordType; |
|
9
|
|
|
use RemotelyLiving\PHPDNS\Entities\Hostname; |
|
10
|
|
|
use RemotelyLiving\PHPDNS\Observability\Interfaces\Observable; |
|
11
|
|
|
use RemotelyLiving\PHPDNS\Resolvers\Exceptions\QueryFailure; |
|
12
|
|
|
use RemotelyLiving\PHPDNS\Resolvers\Interfaces; |
|
13
|
|
|
use RemotelyLiving\PHPDNS\Resolvers\Interfaces\Resolver; |
|
14
|
|
|
use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
|
15
|
|
|
|
|
16
|
|
|
class Chain extends ResolverAbstract implements Interfaces\Chain |
|
17
|
|
|
{ |
|
18
|
|
|
const STRATEGY_FIRST_TO_FIND = 0; |
|
19
|
|
|
const STRATEGY_ALL_RESULTS = 1; |
|
20
|
|
|
const STRATEGY_CONSENSUS = 2; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* @var \RemotelyLiving\PHPDNS\Resolvers\Interfaces\Resolver[] |
|
24
|
|
|
*/ |
|
25
|
|
|
private $resolvers; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* @var int |
|
29
|
|
|
*/ |
|
30
|
|
|
private $callThroughStrategy = self::STRATEGY_FIRST_TO_FIND; |
|
31
|
|
|
|
|
32
|
|
|
public function __construct(array $resolvers = []) |
|
33
|
|
|
{ |
|
34
|
|
|
foreach ($resolvers as $resolver) { |
|
35
|
|
|
$this->pushResolver($resolver); |
|
36
|
|
|
} |
|
37
|
|
|
} |
|
38
|
|
|
|
|
39
|
|
|
public function pushResolver(Resolver...$resolvers): void |
|
40
|
|
|
{ |
|
41
|
|
|
foreach ($resolvers as $resolver) { |
|
42
|
|
|
$this->resolvers[] = $resolver; |
|
43
|
|
|
} |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
|
|
public function withAllResults(): Interfaces\Chain |
|
47
|
|
|
{ |
|
48
|
|
|
$all = new self($this->resolvers); |
|
49
|
|
|
$all->callThroughStrategy = self::STRATEGY_ALL_RESULTS; |
|
50
|
|
|
|
|
51
|
|
|
return $all; |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
|
|
public function withFirstResults(): Interfaces\Chain |
|
55
|
|
|
{ |
|
56
|
|
|
$first = new self($this->resolvers); |
|
57
|
|
|
$first->callThroughStrategy = self::STRATEGY_FIRST_TO_FIND; |
|
58
|
|
|
|
|
59
|
|
|
return $first; |
|
60
|
|
|
} |
|
61
|
|
|
|
|
62
|
|
|
public function withConsensusResults(): Interfaces\Chain |
|
63
|
|
|
{ |
|
64
|
|
|
$consensus = new self($this->resolvers); |
|
65
|
|
|
$consensus->callThroughStrategy = self::STRATEGY_CONSENSUS; |
|
66
|
|
|
|
|
67
|
|
|
return $consensus; |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
public function randomly(): Interfaces\Chain |
|
71
|
|
|
{ |
|
72
|
|
|
$randomized = clone $this; |
|
73
|
|
|
shuffle($randomized->resolvers); |
|
74
|
|
|
|
|
75
|
|
|
return $randomized; |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
public function addSubscriber(EventSubscriberInterface $subscriber): void |
|
79
|
|
|
{ |
|
80
|
|
|
foreach ($this->resolvers as $resolver) { |
|
81
|
|
|
if ($resolver instanceof Observable) { |
|
82
|
|
|
$resolver->addSubscriber($subscriber); |
|
83
|
|
|
} |
|
84
|
|
|
} |
|
85
|
|
|
} |
|
86
|
|
|
|
|
87
|
|
|
public function addListener(string $eventName, callable $listener, int $priority = 0): void |
|
88
|
|
|
{ |
|
89
|
|
|
foreach ($this->resolvers as $resolver) { |
|
90
|
|
|
if ($resolver instanceof Observable) { |
|
91
|
|
|
$resolver->addListener($eventName, $listener, $priority); |
|
92
|
|
|
} |
|
93
|
|
|
} |
|
94
|
|
|
} |
|
95
|
|
|
|
|
96
|
|
|
public function setLogger(LoggerInterface $logger): void |
|
97
|
|
|
{ |
|
98
|
|
|
foreach ($this->resolvers as $resolver) { |
|
99
|
|
|
if ($resolver instanceof LoggerAwareInterface) { |
|
100
|
|
|
$resolver->setLogger($logger); |
|
101
|
|
|
} |
|
102
|
|
|
} |
|
103
|
|
|
} |
|
104
|
|
|
|
|
105
|
|
|
public function hasRecord(DNSRecord $record): bool |
|
106
|
|
|
{ |
|
107
|
|
|
foreach ($this->resolvers as $resolver) { |
|
108
|
|
|
if ($resolver->hasRecord($record)) { |
|
109
|
|
|
return true; |
|
110
|
|
|
} |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
|
|
return false; |
|
114
|
|
|
} |
|
115
|
|
|
|
|
116
|
|
|
protected function doQuery(Hostname $hostname, DNSRecordType $recordType): DNSRecordCollection |
|
117
|
|
|
{ |
|
118
|
|
|
$merged = []; |
|
119
|
|
|
|
|
120
|
|
|
foreach ($this->resolvers as $resolver) { |
|
121
|
|
|
try { |
|
122
|
|
|
$records = $resolver->getRecords($hostname, $recordType); |
|
123
|
|
|
} catch (QueryFailure $e) { |
|
124
|
|
|
continue; |
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
if ($this->callThroughStrategy === self::STRATEGY_FIRST_TO_FIND && !$records->isEmpty()) { |
|
128
|
|
|
return $records; |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
/** @var DNSRecord $record */ |
|
132
|
|
|
foreach ($records as $record) { |
|
133
|
|
|
$merged[] = $record; |
|
134
|
|
|
} |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
$collection = new DNSRecordCollection(...$merged); |
|
138
|
|
|
|
|
139
|
|
|
return ($this->callThroughStrategy === self::STRATEGY_CONSENSUS) |
|
140
|
|
|
? $collection->withUniqueValuesExcluded() |
|
141
|
|
|
: $collection->withUniqueValues(); |
|
142
|
|
|
} |
|
143
|
|
|
} |
|
144
|
|
|
|
remotelyliving /
php-dns
