ElasticSearchPlatform::cleanHost() - Code Metrics - Inspection of "Parse elastic error response" - nextcloud/fulltextsearch_elasticsearch - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#154)

by Daniel

created 2021-06-21 16:25 UTC

ElasticSearchPlatform::cleanHost() A

↳ Parent: ElasticSearchPlatform

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	3
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	1

<?php
declare(strict_types=1);


/**
 * FullTextSearch_Elasticsearch - Use Elasticsearch to index the content of your nextcloud
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Maxence Lange <[email protected]>
 * @copyright 2018
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


namespace OCA\FullTextSearch_Elasticsearch\Platform;


use daita\MySmallPhpTools\Traits\TArrayTools;
use daita\MySmallPhpTools\Traits\TPathTools;
use Elasticsearch\Client;
use Elasticsearch\ClientBuilder;
use Elasticsearch\Common\Exceptions\BadRequest400Exception;
use Exception;
use InvalidArgumentException;
use OCA\FullTextSearch_Elasticsearch\Exceptions\AccessIsEmptyException;
use OCA\FullTextSearch_Elasticsearch\Exceptions\ConfigurationException;
use OCA\FullTextSearch_Elasticsearch\Service\ConfigService;
use OCA\FullTextSearch_Elasticsearch\Service\IndexService;
use OCA\FullTextSearch_Elasticsearch\Service\MiscService;
use OCA\FullTextSearch_Elasticsearch\Service\SearchService;
use OCP\FullTextSearch\IFullTextSearchPlatform;
use OCP\FullTextSearch\Model\IDocumentAccess;
use OCP\FullTextSearch\Model\IIndex;
use OCP\FullTextSearch\Model\IIndexDocument;
use OCP\FullTextSearch\Model\IRunner;
use OCP\FullTextSearch\Model\ISearchResult;


/**
 * Class ElasticSearchPlatform
 *
 * @package OCA\FullTextSearch_Elasticsearch\Platform
 */
class ElasticSearchPlatform implements IFullTextSearchPlatform {


	use TPathTools;

	use TArrayTools;


	/** @var ConfigService */
	private $configService;

	/** @var IndexService */
	private $indexService;

	/** @var SearchService */
	private $searchService;

	/** @var MiscService */
	private $miscService;

	/** @var Client */
	private $client;

	/** @var IRunner */
	private $runner;


	/**
	 * ElasticSearchPlatform constructor.
	 *
	 * @param ConfigService $configService
	 * @param IndexService $indexService
	 * @param SearchService $searchService
	 * @param MiscService $miscService
	 */
	public function __construct(
		ConfigService $configService, IndexService $indexService, SearchService $searchService,
		MiscService $miscService
	) {
		$this->configService = $configService;
		$this->indexService = $indexService;
		$this->searchService = $searchService;
		$this->miscService = $miscService;
	}


	/**
	 * return a unique Id of the platform.
	 */
	public function getId(): string {
		return 'elastic_search';
	}


	/**
	 * return a unique Id of the platform.
	 */
	public function getName(): string {
		return 'Elasticsearch';
	}


	/**
	 * @return array
	 * @throws ConfigurationException
	 */
	public function getConfiguration(): array {
		$result = $this->configService->getConfig();

		$sanitizedHosts = [];
		$hosts = $this->configService->getElasticHost();
		foreach ($hosts as $host) {
			$parsedHost = parse_url($host);
			$safeHost = $parsedHost['scheme'] . '://';
			if (array_key_exists('user', $parsedHost)) {
				$safeHost .= $parsedHost['user'] . ':' . '********' . '@';
			}
			$safeHost .= $parsedHost['host'];
			$safeHost .= ':' . $parsedHost['port'];

			$sanitizedHosts[] = $safeHost;
		}

		$result['elastic_host'] = $sanitizedHosts;

		return $result;
	}


	/**
	 * @param IRunner $runner
	 */
	public function setRunner(IRunner $runner) {
		$this->runner = $runner;
	}


	/**
	 * Called when loading the platform.
	 *
	 * Loading some container and connect to ElasticSearch.
	 *
	 * @throws ConfigurationException
	 * @throws Exception
	 */
	public function loadPlatform() {
		try {
			$this->connectToElastic($this->configService->getElasticHost());
		} catch (ConfigurationException $e) {
			throw $e;
		}
	}


	/**
	 * not used yet.
	 *
	 * @return bool
	 */
	public function testPlatform(): bool {
		return $this->client->ping();
	}


	/**
	 * called before any index
	 *
	 * We create a general index.
	 *
	 * @throws ConfigurationException
	 * @throws BadRequest400Exception
	 */
	public function initializeIndex() {
		$this->indexService->initializeIndex($this->client);
	}


	/**
	 * resetIndex();
	 *
	 * Called when admin wants to remove an index specific to a $provider.
	 * $provider can be null, meaning a reset of the whole index.
	 *
	 * @param string $providerId
	 *
	 * @throws ConfigurationException
	 */
	public function resetIndex(string $providerId) {
		if ($providerId === 'all') {
			$this->indexService->resetIndexAll($this->client);
		} else {
			$this->indexService->resetIndex($this->client, $providerId);
		}
	}


	/**
	 * @param IIndexDocument $document
	 *
	 * @return IIndex
	 */
	public function indexDocument(IIndexDocument $document): IIndex {

		$document->initHash();

		try {
			$result = $this->indexService->indexDocument($this->client, $document);
			$index = $this->indexService->parseIndexResult($document->getIndex(), $result);

			$this->updateNewIndexResult(
				$document->getIndex(), json_encode($result), 'ok',
				IRunner::RESULT_TYPE_SUCCESS
			);

			return $index;
		} catch (Exception $e) {
			$this->updateNewIndexResult(
				$document->getIndex(), '', 'issue while indexing, testing with empty content',
				IRunner::RESULT_TYPE_WARNING
			);

			$this->manageIndexErrorException($document, $e);
		}

		try {
			$result = $this->indexDocumentError($document, $e);
			$index = $this->indexService->parseIndexResult($document->getIndex(), $result);

			$this->updateNewIndexResult(
				$document->getIndex(), json_encode($result), 'ok',
				IRunner::RESULT_TYPE_WARNING
			);

			return $index;
		} catch (Exception $e) {
			$this->updateNewIndexResult(
				$document->getIndex(), '', 'fail',
				IRunner::RESULT_TYPE_FAIL
			);
			$this->manageIndexErrorException($document, $e);
		}

		return $document->getIndex();
	}


	/**
	 * @param IIndexDocument $document
	 * @param Exception $e
	 *
	 * @return array
	 * @throws AccessIsEmptyException
	 * @throws ConfigurationException
	 * @throws Exception
	 */
	private function indexDocumentError(IIndexDocument $document, Exception $e): array {

		$this->updateRunnerAction('indexDocumentWithoutContent', true);

		$document->setContent('');
//		$index = $document->getIndex();
//		$index->unsetStatus(Index::INDEX_CONTENT);

		return $this->indexService->indexDocument($this->client, $document);
	}


	/**
	 * @param IIndexDocument $document
	 * @param Exception $e
	 */
	private function manageIndexErrorException(IIndexDocument $document, Exception $e) {

		$message = $this->parseIndexErrorException($e);
		$document->getIndex()
				 ->addError($message, get_class($e), IIndex::ERROR_SEV_3);
		$this->updateNewIndexError(
			$document->getIndex(), $message, get_class($e), IIndex::ERROR_SEV_3
		);
	}


	/**
	 * @param Exception $e
	 *
	 * @return string
	 */
	private function parseIndexErrorException(Exception $e): string {
		$arr = json_decode($e->getMessage(), true);
		if (!is_array($arr) || !isset($arr['error'])) {
			return $e->getMessage();
		}

		try {
			return $this->parseCausedBy($arr['error']);
		} catch (InvalidArgumentException $e) {
			// unable to parse caused_by -> fallback to root_cause
		}

		$cause = $this->getArray('error.root_cause', $arr);
		if (!empty($cause) && $this->get('reason', $cause[0]) !== '') {
			return $this->get('reason', $cause[0]);
		}

		return $e->getMessage();
	}

	/**
	 * @throws InvalidArgumentException
	 */
	private function parseCausedBy(array $error): string {
		if (isset($error['caused_by'])) {
			return $this->parseCausedBy($error['caused_by']);
		}

		if (isset($error['reason'])) {
			return $error['reason'];
		}

		throw new InvalidArgumentException('Unable to parse given response structure');
	}

	/**
	 * {@inheritdoc}
	 * @throws ConfigurationException
	 */
	public function deleteIndexes(array $indexes) {
		try {
			$this->indexService->deleteIndexes($this->client, $indexes);
		} catch (ConfigurationException $e) {
			throw $e;
		}
	}


	/**
	 * {@inheritdoc}
	 * @throws Exception
	 */
	public function searchRequest(ISearchResult $result, IDocumentAccess $access) {
		$this->searchService->searchRequest($this->client, $result, $access);
	}


	/**
	 * @param string $providerId
	 * @param string $documentId
	 *
	 * @return IIndexDocument
	 * @throws ConfigurationException
	 */
	public function getDocument(string $providerId, string $documentId): IIndexDocument {
		return $this->searchService->getDocument($this->client, $providerId, $documentId);
	}


	private function cleanHost($host) {
		return $this->withoutEndSlash($host, false, false);
	}

	/**
	 * @param array $hosts
	 *
	 * @throws Exception
	 */
	private function connectToElastic(array $hosts) {

		try {
			$hosts = array_map([$this, 'cleanHost'], $hosts);
			$this->client = ClientBuilder::create()
										 ->setHosts($hosts)
										 ->setRetries(3)
										 ->build();

//		}
//		catch (CouldNotConnectToHost $e) {
//			$this 'CouldNotConnectToHost';
//			$previous = $e->getPrevious();
//			if ($previous instanceof MaxRetriesException) {
//				echo "Max retries!";
//			}
		} catch (Exception $e) {
			throw $e;
//			echo ' ElasticSearchPlatform::load() Exception --- ' . $e->getMessage() . "\n";
		}
	}


	/**
	 * @param string $action
	 * @param bool $force
	 *
	 * @throws Exception
	 */
	private function updateRunnerAction(string $action, bool $force = false) {
		if ($this->runner === null) {
			return;
		}

		$this->runner->updateAction($action, $force);
	}


	/**
	 * @param IIndex $index
	 * @param string $message
	 * @param string $exception
	 * @param int $sev
	 */
	private function updateNewIndexError(IIndex $index, string $message, string $exception, int $sev
	) {
		if ($this->runner === null) {
			return;
		}

		$this->runner->newIndexError($index, $message, $exception, $sev);
	}


	/**
	 * @param IIndex $index
	 * @param string $message
	 * @param string $status
	 * @param int $type
	 */
	private function updateNewIndexResult(IIndex $index, string $message, string $status, int $type
	) {
		if ($this->runner === null) {
			return;
		}

		$this->runner->newIndexResult($index, $message, $status, $type);
	}


}


1			<?php
2			declare(strict_types=1);
3
4
5			/**
6			* FullTextSearch_Elasticsearch - Use Elasticsearch to index the content of your nextcloud
7			*
8			* This file is licensed under the Affero General Public License version 3 or
9			* later. See the COPYING file.
10			*
11			* @author Maxence Lange <[email protected]>
12			* @copyright 2018
13			* @license GNU AGPL version 3 or any later version
14			*
15			* This program is free software: you can redistribute it and/or modify
16			* it under the terms of the GNU Affero General Public License as
17			* published by the Free Software Foundation, either version 3 of the
18			* License, or (at your option) any later version.
19			*
20			* This program is distributed in the hope that it will be useful,
21			* but WITHOUT ANY WARRANTY; without even the implied warranty of
22			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23			* GNU Affero General Public License for more details.
24			*
25			* You should have received a copy of the GNU Affero General Public License
26			* along with this program. If not, see <http://www.gnu.org/licenses/>.
27			*
28			*/
29
30
31			namespace OCA\FullTextSearch_Elasticsearch\Platform;
32
33
34			use daita\MySmallPhpTools\Traits\TArrayTools;
35			use daita\MySmallPhpTools\Traits\TPathTools;
36			use Elasticsearch\Client;
37			use Elasticsearch\ClientBuilder;
38			use Elasticsearch\Common\Exceptions\BadRequest400Exception;
39			use Exception;
40			use InvalidArgumentException;
41			use OCA\FullTextSearch_Elasticsearch\Exceptions\AccessIsEmptyException;
42			use OCA\FullTextSearch_Elasticsearch\Exceptions\ConfigurationException;
43			use OCA\FullTextSearch_Elasticsearch\Service\ConfigService;
44			use OCA\FullTextSearch_Elasticsearch\Service\IndexService;
45			use OCA\FullTextSearch_Elasticsearch\Service\MiscService;
46			use OCA\FullTextSearch_Elasticsearch\Service\SearchService;
47			use OCP\FullTextSearch\IFullTextSearchPlatform;
48			use OCP\FullTextSearch\Model\IDocumentAccess;
49			use OCP\FullTextSearch\Model\IIndex;
50			use OCP\FullTextSearch\Model\IIndexDocument;
51			use OCP\FullTextSearch\Model\IRunner;
52			use OCP\FullTextSearch\Model\ISearchResult;
53
54
55			/**
56			* Class ElasticSearchPlatform
57			*
58			* @package OCA\FullTextSearch_Elasticsearch\Platform
59			*/
60			class ElasticSearchPlatform implements IFullTextSearchPlatform {
61
62
63			use TPathTools;
			0 ignored issues – show Deprecated Code introduced 2020-12-11 01:25 UTC by Report Bug Copy Issue Report The trait `daita\MySmallPhpTools\Traits\TPathTools` has been deprecated with message: - 19 This class, trait or interface has been deprecated. The supplier of the file has supplied an explanatory message. The explanatory message should give you some clue as to whether and when the type will be removed from the class and what other constant to use instead. Loading history...
64			use TArrayTools;
65
66
67			/** @var ConfigService */
68			private $configService;
69
70			/** @var IndexService */
71			private $indexService;
72
73			/** @var SearchService */
74			private $searchService;
75
76			/** @var MiscService */
77			private $miscService;
78
79			/** @var Client */
80			private $client;
81
82			/** @var IRunner */
83			private $runner;
84
85
86			/**
87			* ElasticSearchPlatform constructor.
88			*
89			* @param ConfigService $configService
90			* @param IndexService $indexService
91			* @param SearchService $searchService
92			* @param MiscService $miscService
93			*/
94			public function __construct(
95			ConfigService $configService, IndexService $indexService, SearchService $searchService,
96			MiscService $miscService
97			) {
98			$this->configService = $configService;
99			$this->indexService = $indexService;
100			$this->searchService = $searchService;
101			$this->miscService = $miscService;
102			}
103
104
105			/**
106			* return a unique Id of the platform.
107			*/
108			public function getId(): string {
109			return 'elastic_search';
110			}
111
112
113			/**
114			* return a unique Id of the platform.
115			*/
116			public function getName(): string {
117			return 'Elasticsearch';
118			}
119
120
121			/**
122			* @return array
123			* @throws ConfigurationException
124			*/
125			public function getConfiguration(): array {
126			$result = $this->configService->getConfig();
127
128			$sanitizedHosts = [];
129			$hosts = $this->configService->getElasticHost();
130			foreach ($hosts as $host) {
131			$parsedHost = parse_url($host);
132			$safeHost = $parsedHost['scheme'] . '://';
133			if (array_key_exists('user', $parsedHost)) {
134			$safeHost .= $parsedHost['user'] . ':' . '********' . '@';
135			}
136			$safeHost .= $parsedHost['host'];
137			$safeHost .= ':' . $parsedHost['port'];
138
139			$sanitizedHosts[] = $safeHost;
140			}
141
142			$result['elastic_host'] = $sanitizedHosts;
143
144			return $result;
145			}
146
147
148			/**
149			* @param IRunner $runner
150			*/
151			public function setRunner(IRunner $runner) {
152			$this->runner = $runner;
153			}
154
155
156			/**
157			* Called when loading the platform.
158			*
159			* Loading some container and connect to ElasticSearch.
160			*
161			* @throws ConfigurationException
162			* @throws Exception
163			*/
164			public function loadPlatform() {
165			try {
166			$this->connectToElastic($this->configService->getElasticHost());
167			} catch (ConfigurationException $e) {
168			throw $e;
169			}
170			}
171
172
173			/**
174			* not used yet.
175			*
176			* @return bool
177			*/
178			public function testPlatform(): bool {
179			return $this->client->ping();
180			}
181
182
183			/**
184			* called before any index
185			*
186			* We create a general index.
187			*
188			* @throws ConfigurationException
189			* @throws BadRequest400Exception
190			*/
191			public function initializeIndex() {
192			$this->indexService->initializeIndex($this->client);
193			}
194
195
196			/**
197			* resetIndex();
198			*
199			* Called when admin wants to remove an index specific to a $provider.
200			* $provider can be null, meaning a reset of the whole index.
201			*
202			* @param string $providerId
203			*
204			* @throws ConfigurationException
205			*/
206			public function resetIndex(string $providerId) {
207			if ($providerId === 'all') {
208			$this->indexService->resetIndexAll($this->client);
209			} else {
210			$this->indexService->resetIndex($this->client, $providerId);
211			}
212			}
213
214
215			/**
216			* @param IIndexDocument $document
217			*
218			* @return IIndex
219			*/
220			public function indexDocument(IIndexDocument $document): IIndex {
221
222			$document->initHash();
223
224			try {
225			$result = $this->indexService->indexDocument($this->client, $document);
226			$index = $this->indexService->parseIndexResult($document->getIndex(), $result);
227
228			$this->updateNewIndexResult(
229			$document->getIndex(), json_encode($result), 'ok',
230			IRunner::RESULT_TYPE_SUCCESS
231			);
232
233			return $index;
234			} catch (Exception $e) {
235			$this->updateNewIndexResult(
236			$document->getIndex(), '', 'issue while indexing, testing with empty content',
237			IRunner::RESULT_TYPE_WARNING
238			);
239
240			$this->manageIndexErrorException($document, $e);
241			}
242
243			try {
244			$result = $this->indexDocumentError($document, $e);
245			$index = $this->indexService->parseIndexResult($document->getIndex(), $result);
246
247			$this->updateNewIndexResult(
248			$document->getIndex(), json_encode($result), 'ok',
249			IRunner::RESULT_TYPE_WARNING
250			);
251
252			return $index;
253			} catch (Exception $e) {
254			$this->updateNewIndexResult(
255			$document->getIndex(), '', 'fail',
256			IRunner::RESULT_TYPE_FAIL
257			);
258			$this->manageIndexErrorException($document, $e);
259			}
260
261			return $document->getIndex();
262			}
263
264
265			/**
266			* @param IIndexDocument $document
267			* @param Exception $e
268			*
269			* @return array
270			* @throws AccessIsEmptyException
271			* @throws ConfigurationException
272			* @throws Exception
273			*/
274			private function indexDocumentError(IIndexDocument $document, Exception $e): array {
275
276			$this->updateRunnerAction('indexDocumentWithoutContent', true);
277
278			$document->setContent('');
279			// $index = $document->getIndex();
280			// $index->unsetStatus(Index::INDEX_CONTENT);
281
282			return $this->indexService->indexDocument($this->client, $document);
283			}
284
285
286			/**
287			* @param IIndexDocument $document
288			* @param Exception $e
289			*/
290			private function manageIndexErrorException(IIndexDocument $document, Exception $e) {
291
292			$message = $this->parseIndexErrorException($e);
293			$document->getIndex()
294			->addError($message, get_class($e), IIndex::ERROR_SEV_3);
295			$this->updateNewIndexError(
296			$document->getIndex(), $message, get_class($e), IIndex::ERROR_SEV_3
297			);
298			}
299
300
301			/**
302			* @param Exception $e
303			*
304			* @return string
305			*/
306			private function parseIndexErrorException(Exception $e): string {
307			$arr = json_decode($e->getMessage(), true);
308			if (!is_array($arr) \|\| !isset($arr['error'])) {
309			return $e->getMessage();
310			}
311
312			try {
313			return $this->parseCausedBy($arr['error']);
314			} catch (InvalidArgumentException $e) {
315			// unable to parse caused_by -> fallback to root_cause
316			}
317
318			$cause = $this->getArray('error.root_cause', $arr);
319			if (!empty($cause) && $this->get('reason', $cause[0]) !== '') {
320			return $this->get('reason', $cause[0]);
321			}
322
323			return $e->getMessage();
324			}
325
326			/**
327			* @throws InvalidArgumentException
328			*/
329			private function parseCausedBy(array $error): string {
330			if (isset($error['caused_by'])) {
331			return $this->parseCausedBy($error['caused_by']);
332			}
333
334			if (isset($error['reason'])) {
335			return $error['reason'];
336			}
337
338			throw new InvalidArgumentException('Unable to parse given response structure');
339			}
340
341			/**
342			* {@inheritdoc}
343			* @throws ConfigurationException
344			*/
345			public function deleteIndexes(array $indexes) {
346			try {
347			$this->indexService->deleteIndexes($this->client, $indexes);
348			} catch (ConfigurationException $e) {
349			throw $e;
350			}
351			}
352
353
354			/**
355			* {@inheritdoc}
356			* @throws Exception
357			*/
358			public function searchRequest(ISearchResult $result, IDocumentAccess $access) {
359			$this->searchService->searchRequest($this->client, $result, $access);
360			}
361
362
363			/**
364			* @param string $providerId
365			* @param string $documentId
366			*
367			* @return IIndexDocument
368			* @throws ConfigurationException
369			*/
370			public function getDocument(string $providerId, string $documentId): IIndexDocument {
371			return $this->searchService->getDocument($this->client, $providerId, $documentId);
372			}
373
374
375			private function cleanHost($host) {
376			return $this->withoutEndSlash($host, false, false);
377			}
378
379			/**
380			* @param array $hosts
381			*
382			* @throws Exception
383			*/
384			private function connectToElastic(array $hosts) {
385
386			try {
387			$hosts = array_map([$this, 'cleanHost'], $hosts);
388			$this->client = ClientBuilder::create()
389			->setHosts($hosts)
390			->setRetries(3)
391			->build();
392
393			// }
394			// catch (CouldNotConnectToHost $e) {
395			// $this 'CouldNotConnectToHost';
396			// $previous = $e->getPrevious();
397			// if ($previous instanceof MaxRetriesException) {
398			// echo "Max retries!";
399			// }
400			} catch (Exception $e) {
401			throw $e;
402			// echo ' ElasticSearchPlatform::load() Exception --- ' . $e->getMessage() . "\n";
403			}
404			}
405
406
407			/**
408			* @param string $action
409			* @param bool $force
410			*
411			* @throws Exception
412			*/
413			private function updateRunnerAction(string $action, bool $force = false) {
414			if ($this->runner === null) {
415			return;
416			}
417
418			$this->runner->updateAction($action, $force);
419			}
420
421
422			/**
423			* @param IIndex $index
424			* @param string $message
425			* @param string $exception
426			* @param int $sev
427			*/
428			private function updateNewIndexError(IIndex $index, string $message, string $exception, int $sev
429			) {
430			if ($this->runner === null) {
431			return;
432			}
433
434			$this->runner->newIndexError($index, $message, $exception, $sev);
435			}
436
437
438			/**
439			* @param IIndex $index
440			* @param string $message
441			* @param string $status
442			* @param int $type
443			*/
444			private function updateNewIndexResult(IIndex $index, string $message, string $status, int $type
445			) {
446			if ($this->runner === null) {
447			return;
448			}
449
450			$this->runner->newIndexResult($index, $message, $status, $type);
451			}
452
453
454			}
455

nextcloud / fulltextsearch_elasticsearch

Pull Request — master (#154)

ElasticSearchPlatform::cleanHost() A

Complexity

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Duplication

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