Locator::querySeeds() - Code Metrics - Inspection of "deal with some random connection errors" - Bit-Wasp/bitcoin-p2p-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 4d00a0...e4a998 )

by thomas

created 2017-07-15 20:31 UTC

Locator::querySeeds() A

↳ Parent: Locator

Complexity

Conditions	2
Paths	2

Size

Total Lines	22
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	4.048

Importance

Changes

Metric	Value
dl	0
loc	22
ccs	2
cts	10
cp	0.2
rs	9.2
c	0
b	0
f	0
cc	2
eloc	12
nc	2
nop	1
crap	4.048

<?php

namespace BitWasp\Bitcoin\Networking\Peer;

use BitWasp\Bitcoin\Networking\DnsSeeds\DnsSeedList;
use BitWasp\Bitcoin\Networking\Ip\Ipv4;
use BitWasp\Bitcoin\Networking\Settings\NetworkSettings;
use BitWasp\Bitcoin\Networking\Services;
use BitWasp\Bitcoin\Networking\Structure\NetworkAddress;
use BitWasp\Bitcoin\Networking\Structure\NetworkAddressInterface;
use React\Dns\Resolver\Resolver;
use React\Promise\Deferred;

class Locator
{

    /**
     * @var Resolver
     */
    private $dns;

    /**
     * @var DnsSeedList
     */
    private $seeds;

    /**
     * @var NetworkAddressInterface[]
     */
    private $knownAddresses = [];

    /**
     * Locator constructor.
     * @param Resolver $dns
     * @param NetworkSettings $settings
     */
    public function __construct(Resolver $dns, NetworkSettings $settings)
    {
        $this->seeds = $settings->getDnsSeedList();
        $this->dns = $dns;
        $this->settings = $settings;
class MyClass { }

$x = new MyClass();
$x->foo = true;
    }

    /**
     * Takes an arbitrary list of dns seed hostnames, and attempts
     * to return a list from each. Request fails if any hosts are
     * offline or cause an error.
     *
     * @param array $seeds
     * @return \React\Promise\Promise|\React\Promise\PromiseInterface
     */
    public function querySeeds(array $seeds)
    {
        $peerList = new Deferred();

        // Connect to $numSeeds peers
        /** @var Peer[] $vNetAddr */
        $vNetAddr = [];
        $c = 0;
        foreach ($seeds as $seed) {
            $this->dns
                ->resolve($seed)
                ->then(function ($ipList) use (&$vNetAddr, $peerList, &$numSeeds, &$c) {
                    $peerList->resolve($ipList);
                }, function ($error) use ($peerList) {
                    $peerList->reject($error);
                })
            ;
        }

        // Compile the list of lists of peers into $this->knownAddresses
        return $peerList->promise();
    }

    /**
     * Given a number of DNS seeds to query, select a random few and
     * return their peers.
     *
     * @param int $numSeeds
     * @return \React\Promise\Promise|\React\Promise\PromiseInterface
     */
    private function getPeerList($numSeeds = 1)
    {
        // Take $numSeeds
        $seedHosts = $this->seeds->getHosts();
        shuffle($seedHosts);
        $seeds = array_slice($seedHosts, 0, min($numSeeds, count($seedHosts)));

        return $this->querySeeds($seeds);
    }

    /**
     * Query $numSeeds DNS seeds, returning the NetworkAddress[] result.
     * Is rejected if any of the seeds fail.
     *
     * @param int $numSeeds
     * @return \React\Promise\Promise|\React\Promise\PromiseInterface
     */
    public function queryDnsSeeds($numSeeds = 1)
    {
        $deferred = new Deferred();
        $this
            ->getPeerList($numSeeds)
            ->then(
                function (array $vPeerVAddrs) use ($deferred) {
                    shuffle($vPeerVAddrs);

                    /** @var NetworkAddressInterface[] $addresses */
                    $addresses = [];
                    foreach ($vPeerVAddrs as $ip) {
                        $addresses[] = new NetworkAddress(
                            Services::NETWORK,
                            new Ipv4($ip),
                            $this->settings->getDefaultP2PPort()
                        );
                    }

                    $this->knownAddresses = array_merge(
                        $this->knownAddresses,
                        $addresses
                    );

                    $deferred->resolve($this);
                },
                function ($error) use ($deferred) {
                    $deferred->reject($error);
                }
            )
        ;

        return $deferred->promise();
    }

    /**
     * @return NetworkAddressInterface[]
     */
    public function getKnownAddresses()
    {
        return $this->knownAddresses;
    }

    /**
     * Pop an address from the discovered peers
     *
     * @return NetworkAddressInterface
     * @throws \Exception
     */
    public function popAddress()
    {
        if (count($this->knownAddresses) < 1) {
            throw new \Exception('No peers');
        }

        return array_pop($this->knownAddresses);
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Networking\Peer;
4
5		use BitWasp\Bitcoin\Networking\DnsSeeds\DnsSeedList;
6		use BitWasp\Bitcoin\Networking\Ip\Ipv4;
7		use BitWasp\Bitcoin\Networking\Settings\NetworkSettings;
8		use BitWasp\Bitcoin\Networking\Services;
9		use BitWasp\Bitcoin\Networking\Structure\NetworkAddress;
10		use BitWasp\Bitcoin\Networking\Structure\NetworkAddressInterface;
11		use React\Dns\Resolver\Resolver;
12		use React\Promise\Deferred;
13
14		class Locator
15		{
16
17		/**
18		* @var Resolver
19		*/
20		private $dns;
21
22		/**
23		* @var DnsSeedList
24		*/
25		private $seeds;
26
27		/**
28		* @var NetworkAddressInterface[]
29		*/
30		private $knownAddresses = [];
31
32		/**
33		* Locator constructor.
34		* @param Resolver $dns
35		* @param NetworkSettings $settings
36	9	*/
37		public function __construct(Resolver $dns, NetworkSettings $settings)
38	9	{
39	9	$this->seeds = $settings->getDnsSeedList();
40	9	$this->dns = $dns;
41		$this->settings = $settings;
		0 ignored issues – show Bug introduced 2017-07-15 17:57 UTC by Report Bug Copy Issue Report The property `settings` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
42		}
43
44		/**
45		* Takes an arbitrary list of dns seed hostnames, and attempts
46		* to return a list from each. Request fails if any hosts are
47		* offline or cause an error.
48		*
49		* @param array $seeds
50		* @return \React\Promise\Promise\|\React\Promise\PromiseInterface
51		*/
52		public function querySeeds(array $seeds)
53		{
54		$peerList = new Deferred();
55
56		// Connect to $numSeeds peers
57		/** @var Peer[] $vNetAddr */
58		$vNetAddr = [];
59		$c = 0;
60		foreach ($seeds as $seed) {
61		$this->dns
62		->resolve($seed)
63		->then(function ($ipList) use (&$vNetAddr, $peerList, &$numSeeds, &$c) {
64		$peerList->resolve($ipList);
65		}, function ($error) use ($peerList) {
66		$peerList->reject($error);
67		})
68		;
69	6	}
70
71	6	// Compile the list of lists of peers into $this->knownAddresses
72		return $peerList->promise();
73		}
74	6
75	6	/**
76	6	* Given a number of DNS seeds to query, select a random few and
77		* return their peers.
78		*
79		* @param int $numSeeds
80	6	* @return \React\Promise\Promise\|\React\Promise\PromiseInterface
81	6	*/
82	6	private function getPeerList($numSeeds = 1)
83	6	{
84	6	// Take $numSeeds
85		$seedHosts = $this->seeds->getHosts();
86	5	shuffle($seedHosts);
87	5	$seeds = array_slice($seedHosts, 0, min($numSeeds, count($seedHosts)));
88	5
89	3	return $this->querySeeds($seeds);
90		}
91	1
92	6	/**
93		* Query $numSeeds DNS seeds, returning the NetworkAddress[] result.
94	4	* Is rejected if any of the seeds fail.
95		*
96		* @param int $numSeeds
97	6	* @return \React\Promise\Promise\|\React\Promise\PromiseInterface
98		*/
99		public function queryDnsSeeds($numSeeds = 1)
100		{
101		$deferred = new Deferred();
102		$this
103		->getPeerList($numSeeds)
104		->then(
105		function (array $vPeerVAddrs) use ($deferred) {
106	6	shuffle($vPeerVAddrs);
107
108	6	/** @var NetworkAddressInterface[] $addresses */
109	4	$addresses = [];
110	6	foreach ($vPeerVAddrs as $ip) {
111	6	$addresses[] = new NetworkAddress(
112		Services::NETWORK,
113	5	new Ipv4($ip),
114		$this->settings->getDefaultP2PPort()
115		);
116	5	}
117	5
118	5	$this->knownAddresses = array_merge(
119	5	$this->knownAddresses,
120	5	$addresses
121	2	);
122	3
123	3	$deferred->resolve($this);
124		},
125	5	function ($error) use ($deferred) {
126	5	$deferred->reject($error);
127		}
128	3	)
129		;
130	5
131	6	return $deferred->promise();
132	3	}
133	1
134	3	/**
135	4	* @return NetworkAddressInterface[]
136		*/
137		public function getKnownAddresses()
138	6	{
139		return $this->knownAddresses;
140		}
141
142		/**
143		* Pop an address from the discovered peers
144	2	*
145		* @return NetworkAddressInterface
146	2	* @throws \Exception
147		*/
148		public function popAddress()
149		{
150		if (count($this->knownAddresses) < 1) {
151		throw new \Exception('No peers');
152		}
153
154		return array_pop($this->knownAddresses);
155	6	}
156		}
157

Bit-Wasp / bitcoin-p2p-php

Push — master ( 4d00a0...e4a998 )

Locator::querySeeds() A

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