Client::transmit() - Code Metrics - Inspection of "Use HTTP factory and introduce stream handler" - sandrokeil/arangodb-php-client - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#7)

by Sandro

created 2019-06-16 12:40 UTC

Client::transmit() B

↳ Parent: Client

Complexity

Conditions	10
Paths	7

Size

Total Lines	37
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	23
CRAP Score	10.0071

Importance

Changes

Metric	Value
eloc	24
dl	0
loc	37
ccs	23
cts	24
cp	0.9583
rs	7.6666
c	0
b	0
f	0
cc	10
nc	7
nop	2
crap	10.0071

How to fix Complexity

<?php
/**
 * Sandro Keil (https://sandro-keil.de)
 *
 * @link      http://github.com/sandrokeil/arangodb-php-client for the canonical source repository
 * @copyright Copyright (c) 2018-2019 Sandro Keil
 * @license   http://github.com/sandrokeil/arangodb-php-client/blob/master/LICENSE.md New BSD License
 */

declare(strict_types=1);

namespace ArangoDb;

use ArangoDb\Exception\ConnectionException;
use ArangoDb\Exception\NetworkException;
use ArangoDb\Exception\RequestFailedException;
use ArangoDb\Exception\TimeoutException;
use Fig\Http\Message\StatusCodeInterface;
use Psr\Http\Client\ClientInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseFactoryInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamFactoryInterface;

final class Client implements ClientInterface
{
    /**
     * Chunk size in bytes
     */
    private const CHUNK_SIZE = 8192;

    /**
     * End of line mark used in HTTP
     */
    private const EOL = "\r\n";

    /**
     * Connection handle
     *
     * @var resource
     */
    private $handle;

    /**
     * @var bool
     */
    private $useKeepAlive;

    /**
     * @var ClientOptions
     */
    private $options;

    /**
     * @var string
     */
    private $baseUrl = '';

    /**
     * Default headers for all requests
     *
     * @var string
     */
    private $headerLines = '';

    /**
     * @var string
     */
    private $database = '';

    /**
     * @var ResponseFactoryInterface
     */
    private $responseFactory;

    /**
     * @var StreamFactoryInterface
     */
    private $streamFactory;

    /**
     * @param array|ClientOptions $options
     * @param ResponseFactoryInterface $responseFactory
     * @param StreamFactoryInterface $streamFactory
     */
    public function __construct(
        $options,
        ResponseFactoryInterface $responseFactory,
        StreamFactoryInterface $streamFactory
    ) {
        $this->options = $options instanceof ClientOptions ? $options : new ClientOptions($options);
        $this->useKeepAlive = ($this->options[ClientOptions::OPTION_CONNECTION] === 'Keep-Alive');
        $this->responseFactory = $responseFactory;
        $this->streamFactory = $streamFactory;
        $this->updateCommonHttpHeaders();
    }

    /**
     * Delegate / shorthand method
     *
     * @param RequestInterface $request
     * @return ResponseInterface
     * @throws \Psr\Http\Client\ClientExceptionInterface
     */
    public function __invoke(RequestInterface $request): ResponseInterface
    {
        return $this->sendRequest($request);
    }

    public function sendRequest(RequestInterface $request): ResponseInterface
    {
        try {
            $stream = $request->getBody();
            $body = $stream->getContents();
            $method = $request->getMethod();

            $customHeaders = $request->getHeaders();
            unset($customHeaders['Connection'], $customHeaders['Content-Length']);

            if (! isset($customHeaders['Content-Type'])) {
                $customHeaders['Content-Type'] = ['application/json'];
            }

            $customHeader = '';
            foreach ($customHeaders as $headerKey => $headerValues) {
                foreach ($headerValues as $headerValue) {
                    $customHeader .= $headerKey . ': ' . $headerValue . self::EOL;
                }
            }
        } catch (\Throwable $e) {
            throw RequestFailedException::ofRequest($request, $e);
        }

        $customHeader .= 'Content-Length: ' . $stream->getSize() . self::EOL;

        $url = $this->baseUrl . $request->getUri();

        try {
            $this->open($request);

            $result = $this->transmit(
                $method . ' ' . $url . ' HTTP/1.1' .
                $this->headerLines .
                $customHeader . self::EOL .
                $body,
                $method
            );
            // TODO https://docs.arangodb.com/3.4/Manual/Architecture/DeploymentModes/ActiveFailover/Architecture.html
            $status = stream_get_meta_data($this->handle);

            if (true === $status['timed_out']) {
                throw TimeoutException::ofRequest($request);
            }
            if (! $this->useKeepAlive) {
                $this->close();
            }

            [$httpCode, $headers, $body] = HttpHelper::parseMessage($result);
        } catch (\Throwable $e) {
            throw NetworkException::with($request, $e);
        }
        $response = $this->responseFactory->createResponse($httpCode);

        foreach ($headers as $headerName => $header) {
            $response = $response->withAddedHeader($headerName, $header);
        }

        return $response->withBody($this->streamFactory->createStream($body));
    }

    /**
     * Sends request to server and reads response.
     *
     * @param string $request
     * @param string $method
     * @return string
     */
    private function transmit(string $request, string $method): string
    {
        fwrite($this->handle, $request);
        fflush($this->handle);

        $contentLength = 0;
        $bodyLength = 0;
        $readTotal = 0;
        $matches = [];
        $message = '';

        do {
            $read = fread($this->handle, self::CHUNK_SIZE);
            if (false === $read || $read === '') {
                break;
            }
            $readLength = strlen($read);
            $readTotal += $readLength;
            $message .= $read;

            if ($contentLength === 0
                && $method !== 'HEAD'
                && 1 === preg_match('/content-length: (\d+)/i', $message, $matches)
            ) {
                $contentLength = (int)$matches[1];
            }

            if ($bodyLength === 0) {
                $bodyStart = strpos($message, "\r\n\r\n");

                if (false !== $bodyStart) {
                    $bodyLength = $bodyStart + $contentLength + 4;
                }
            }
        } while ($readTotal < $bodyLength && ! feof($this->handle));

        return $message;
    }

    /**
     * Update common HTTP headers for all HTTP requests
     */
    private function updateCommonHttpHeaders(): void
    {
        $this->headerLines = self::EOL;

        $endpoint = $this->options[ClientOptions::OPTION_ENDPOINT];
        if (1 !== preg_match('/^unix:\/\/.+/', $endpoint)) {
            $this->headerLines .= 'Host: '
                . preg_replace('/^(tcp|ssl):\/\/(.+?):(\d+)\/?$/', '\\2', $endpoint)
                . self::EOL;
        }
        // add basic auth header
        if (isset(
            $this->options[ClientOptions::OPTION_AUTH_TYPE],
            $this->options[ClientOptions::OPTION_AUTH_USER]
        )) {
            $this->headerLines .= sprintf(
                'Authorization: %s %s%s',
                $this->options[ClientOptions::OPTION_AUTH_TYPE],
                base64_encode(
                    $this->options[ClientOptions::OPTION_AUTH_USER] . ':' .
                    $this->options[ClientOptions::OPTION_AUTH_PASSWD]
                ),
                self::EOL
            );
        }

        if (isset($this->options[ClientOptions::OPTION_CONNECTION])) {
            $this->headerLines .= 'Connection: ' . $this->options[ClientOptions::OPTION_CONNECTION] . self::EOL;
        }

        $this->database = $this->options[ClientOptions::OPTION_DATABASE];
        $this->baseUrl = '/_db/' . urlencode($this->database);
    }

    /**
     * Opens connection depending on options.
     *
     * @param RequestInterface $request
     */
    private function open(RequestInterface $request): void
    {
        if ($this->useKeepAlive && $this->handle !== null && is_resource($this->handle)) {
            if (! feof($this->handle)) {
                return;
            }

            $this->close();

            if (false === $this->options[ClientOptions::OPTION_RECONNECT]) {
                throw ConnectionException::forRequest(
                    $request,
                    'Server has closed the connection already.',
                    StatusCodeInterface::STATUS_REQUEST_TIMEOUT
                );
            }
        }

        $endpoint = $this->options[ClientOptions::OPTION_ENDPOINT];
        $context = stream_context_create();

        if (1 === preg_match('/^ssl:\/\/.+/', $endpoint)) {
            stream_context_set_option(
                $context,
                [
                    'ssl' => [
                        'verify_peer' => $this->options[ClientOptions::OPTION_VERIFY_CERT],
                        'verify_peer_name' => $this->options[ClientOptions::OPTION_VERIFY_CERT_NAME],
                        'allow_self_signed' => $this->options[ClientOptions::OPTION_ALLOW_SELF_SIGNED],
                        'ciphers' => $this->options[ClientOptions::OPTION_CIPHERS],
                    ],
                ]
            );
        }

        $handle = stream_socket_client(
            $endpoint,
            $errNo,
            $message,
            $this->options[ClientOptions::OPTION_TIMEOUT],
            STREAM_CLIENT_CONNECT,
            $context
        );

        if (false === $handle) {
            throw ConnectionException::forRequest(
                $request,
                sprintf('Cannot connect to endpoint "%s". Message: %s', $endpoint, $message),
                $errNo
            );
        }
        $this->handle = $handle;
        stream_set_timeout($this->handle, $this->options[ClientOptions::OPTION_TIMEOUT]);
    }

    /**
     * Closes connection
     */
    private function close(): void
    {
        fclose($this->handle);
        unset($this->handle);
    }
}


1		<?php
2		/**
3		* Sandro Keil (https://sandro-keil.de)
4		*
5		* @link http://github.com/sandrokeil/arangodb-php-client for the canonical source repository
6		* @copyright Copyright (c) 2018-2019 Sandro Keil
7		* @license http://github.com/sandrokeil/arangodb-php-client/blob/master/LICENSE.md New BSD License
8		*/
9
10		declare(strict_types=1);
11
12		namespace ArangoDb;
13
14		use ArangoDb\Exception\ConnectionException;
15		use ArangoDb\Exception\NetworkException;
16		use ArangoDb\Exception\RequestFailedException;
17		use ArangoDb\Exception\TimeoutException;
18		use Fig\Http\Message\StatusCodeInterface;
19		use Psr\Http\Client\ClientInterface;
20		use Psr\Http\Message\RequestInterface;
21		use Psr\Http\Message\ResponseFactoryInterface;
22		use Psr\Http\Message\ResponseInterface;
23		use Psr\Http\Message\StreamFactoryInterface;
24
25		final class Client implements ClientInterface
26		{
27		/**
28		* Chunk size in bytes
29		*/
30		private const CHUNK_SIZE = 8192;
31
32		/**
33		* End of line mark used in HTTP
34		*/
35		private const EOL = "\r\n";
36
37		/**
38		* Connection handle
39		*
40		* @var resource
41		*/
42		private $handle;
43
44		/**
45		* @var bool
46		*/
47		private $useKeepAlive;
48
49		/**
50		* @var ClientOptions
51		*/
52		private $options;
53
54		/**
55		* @var string
56		*/
57		private $baseUrl = '';
58
59		/**
60		* Default headers for all requests
61		*
62		* @var string
63		*/
64		private $headerLines = '';
65
66		/**
67		* @var string
68		*/
69		private $database = '';
70
71		/**
72		* @var ResponseFactoryInterface
73		*/
74		private $responseFactory;
75
76		/**
77		* @var StreamFactoryInterface
78		*/
79		private $streamFactory;
80
81		/**
82		* @param array\|ClientOptions $options
83		* @param ResponseFactoryInterface $responseFactory
84		* @param StreamFactoryInterface $streamFactory
85		*/
86	44	public function __construct(
87		$options,
88		ResponseFactoryInterface $responseFactory,
89		StreamFactoryInterface $streamFactory
90		) {
91	44	$this->options = $options instanceof ClientOptions ? $options : new ClientOptions($options);
92	44	$this->useKeepAlive = ($this->options[ClientOptions::OPTION_CONNECTION] === 'Keep-Alive');
93	44	$this->responseFactory = $responseFactory;
94	44	$this->streamFactory = $streamFactory;
95	44	$this->updateCommonHttpHeaders();
96	44	}
97
98		/**
99		* Delegate / shorthand method
100		*
101		* @param RequestInterface $request
102		* @return ResponseInterface
103		* @throws \Psr\Http\Client\ClientExceptionInterface
104		*/
105		public function __invoke(RequestInterface $request): ResponseInterface
106		{
107		return $this->sendRequest($request);
108		}
109
110	42	public function sendRequest(RequestInterface $request): ResponseInterface
111		{
112		try {
113	42	$stream = $request->getBody();
114	42	$body = $stream->getContents();
115	42	$method = $request->getMethod();
116
117	42	$customHeaders = $request->getHeaders();
118	42	unset($customHeaders['Connection'], $customHeaders['Content-Length']);
119
120	42	if (! isset($customHeaders['Content-Type'])) {
121	7	$customHeaders['Content-Type'] = ['application/json'];
122		}
123
124	42	$customHeader = '';
125	42	foreach ($customHeaders as $headerKey => $headerValues) {
126	42	foreach ($headerValues as $headerValue) {
127	42	$customHeader .= $headerKey . ': ' . $headerValue . self::EOL;
128		}
129		}
130		} catch (\Throwable $e) {
131		throw RequestFailedException::ofRequest($request, $e);
132		}
133
134	42	$customHeader .= 'Content-Length: ' . $stream->getSize() . self::EOL;
135
136	42	$url = $this->baseUrl . $request->getUri();
137
138		try {
139	42	$this->open($request);
140
141	42	$result = $this->transmit(
142	42	$method . ' ' . $url . ' HTTP/1.1' .
143	42	$this->headerLines .
144	42	$customHeader . self::EOL .
145	42	$body,
146		$method
147		);
148		// TODO https://docs.arangodb.com/3.4/Manual/Architecture/DeploymentModes/ActiveFailover/Architecture.html
149	42	$status = stream_get_meta_data($this->handle);
150
151	42	if (true === $status['timed_out']) {
152		throw TimeoutException::ofRequest($request);
153		}
154	42	if (! $this->useKeepAlive) {
155		$this->close();
156		}
157
158	42	[$httpCode, $headers, $body] = HttpHelper::parseMessage($result);
159		} catch (\Throwable $e) {
160		throw NetworkException::with($request, $e);
161		}
162	42	$response = $this->responseFactory->createResponse($httpCode);
163
164	42	foreach ($headers as $headerName => $header) {
165	42	$response = $response->withAddedHeader($headerName, $header);
166		}
167
168	42	return $response->withBody($this->streamFactory->createStream($body));
169		}
170
171		/**
172		* Sends request to server and reads response.
173		*
174		* @param string $request
175		* @param string $method
176		* @return string
177		*/
178	42	private function transmit(string $request, string $method): string
179		{
180	42	fwrite($this->handle, $request);
181	42	fflush($this->handle);
182
183	42	$contentLength = 0;
184	42	$bodyLength = 0;
185	42	$readTotal = 0;
186	42	$matches = [];
187	42	$message = '';
188
189		do {
190	42	$read = fread($this->handle, self::CHUNK_SIZE);
191	42	if (false === $read \|\| $read === '') {
192		break;
193		}
194	42	$readLength = strlen($read);
195	42	$readTotal += $readLength;
196	42	$message .= $read;
197
198	42	if ($contentLength === 0
199	42	&& $method !== 'HEAD'
200	42	&& 1 === preg_match('/content-length: (\d+)/i', $message, $matches)
201		) {
202	42	$contentLength = (int)$matches[1];
203		}
204
205	42	if ($bodyLength === 0) {
206	42	$bodyStart = strpos($message, "\r\n\r\n");
207
208	42	if (false !== $bodyStart) {
209	42	$bodyLength = $bodyStart + $contentLength + 4;
210		}
211		}
212	42	} while ($readTotal < $bodyLength && ! feof($this->handle));
213
214	42	return $message;
215		}
216
217		/**
218		* Update common HTTP headers for all HTTP requests
219		*/
220	44	private function updateCommonHttpHeaders(): void
221		{
222	44	$this->headerLines = self::EOL;
223
224	44	$endpoint = $this->options[ClientOptions::OPTION_ENDPOINT];
225	44	if (1 !== preg_match('/^unix:\/\/.+/', $endpoint)) {
226	44	$this->headerLines .= 'Host: '
227	44	. preg_replace('/^(tcp\|ssl):\/\/(.+?):(\d+)\/?$/', '\\2', $endpoint)
228	44	. self::EOL;
229		}
230		// add basic auth header
231		if (isset(
232	44	$this->options[ClientOptions::OPTION_AUTH_TYPE],
233	44	$this->options[ClientOptions::OPTION_AUTH_USER]
234		)) {
235		$this->headerLines .= sprintf(
236		'Authorization: %s %s%s',
237		$this->options[ClientOptions::OPTION_AUTH_TYPE],
238		base64_encode(
239		$this->options[ClientOptions::OPTION_AUTH_USER] . ':' .
240		$this->options[ClientOptions::OPTION_AUTH_PASSWD]
241		),
242		self::EOL
243		);
244		}
245
246	44	if (isset($this->options[ClientOptions::OPTION_CONNECTION])) {
247	44	$this->headerLines .= 'Connection: ' . $this->options[ClientOptions::OPTION_CONNECTION] . self::EOL;
248		}
249
250	44	$this->database = $this->options[ClientOptions::OPTION_DATABASE];
251	44	$this->baseUrl = '/_db/' . urlencode($this->database);
252	44	}
253
254		/**
255		* Opens connection depending on options.
256		*
257		* @param RequestInterface $request
258		*/
259	42	private function open(RequestInterface $request): void
260		{
261	42	if ($this->useKeepAlive && $this->handle !== null && is_resource($this->handle)) {
262	18	if (! feof($this->handle)) {
263	18	return;
264		}
265
266		$this->close();
267
268		if (false === $this->options[ClientOptions::OPTION_RECONNECT]) {
269		throw ConnectionException::forRequest(
270		$request,
271		'Server has closed the connection already.',
272		StatusCodeInterface::STATUS_REQUEST_TIMEOUT
273		);
274		}
275		}
276
277	42	$endpoint = $this->options[ClientOptions::OPTION_ENDPOINT];
278	42	$context = stream_context_create();
279
280	42	if (1 === preg_match('/^ssl:\/\/.+/', $endpoint)) {
281		stream_context_set_option(
282		$context,
283		[
284		'ssl' => [
285		'verify_peer' => $this->options[ClientOptions::OPTION_VERIFY_CERT],
286		'verify_peer_name' => $this->options[ClientOptions::OPTION_VERIFY_CERT_NAME],
287		'allow_self_signed' => $this->options[ClientOptions::OPTION_ALLOW_SELF_SIGNED],
288		'ciphers' => $this->options[ClientOptions::OPTION_CIPHERS],
289		],
290		]
291		);
292		}
293
294	42	$handle = stream_socket_client(
295	42	$endpoint,
296		$errNo,
297		$message,
298	42	$this->options[ClientOptions::OPTION_TIMEOUT],
299	42	STREAM_CLIENT_CONNECT,
300		$context
301		);
302
303	42	if (false === $handle) {
304		throw ConnectionException::forRequest(
305		$request,
306		sprintf('Cannot connect to endpoint "%s". Message: %s', $endpoint, $message),
307		$errNo
308		);
309		}
310	42	$this->handle = $handle;
311	42	stream_set_timeout($this->handle, $this->options[ClientOptions::OPTION_TIMEOUT]);
312	42	}
313
314		/**
315		* Closes connection
316		*/
317		private function close(): void
318		{
319		fclose($this->handle);
320		unset($this->handle);
321		}
322		}
323

sandrokeil / arangodb-php-client

Pull Request — master (#7)

Client::transmit() B

Complexity

Size

Duplication

Code Coverage

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

Filter issues like