HttpClientTrait::checkConnection() - Code Metrics - maikgreubel/phpgenerics - Measure and Improve Code Quality continuously with Scrutinizer

HttpClientTrait::checkConnection() A
last analyzed 2018-11-11 05:34 UTC

↳ Parent: HttpClientTrait

Complexity

Conditions	3
Paths	3

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	7
CRAP Score	3

Importance

Changes

Metric	Value
dl	0
loc	13
ccs	7
cts	7
cp	1
rs	9.8333
c	0
b	0
f	0
cc	3
nc	3
nop	1
crap	3

<?php
/**
 * This file is part of the PHP Generics package.
 *
 * @package Generics
 */
namespace Generics\Client;

use Generics\Streams\InputOutputStream;
use Generics\Streams\InputStream;
use Generics\Streams\MemoryStream;
use Generics\Socket\Endpoint;
use Generics\Socket\SocketException;

/**
 * This trait provides common http(s) client functionality
 *
 * @author Maik Greubel <[email protected]>
 */
trait HttpClientTrait
{
    use HttpHeadersTrait;

    /**
     * The query string
     *
     * @var string
     */
    private $queryString;

    /**
     * The payload
     *
     * @var MemoryStream
     */
    private $payload;

    /**
     * The HTTP protocol version
     *
     * @var string
     */
    private $protocol;

    /**
     * Path to file on server (excluding endpoint address)
     *
     * @var string
     */
    private $path;

    /**
     * When the connection times out (in seconds)
     *
     * @var int
     */
    private $timeout;

    /**
     * Load headers from remote and return it
     *
     * @return array
     */
    public function retrieveHeaders(): array
    {
        $this->setHeader('Connection', 'close');
        $this->setHeader('Accept', '');
        $this->setHeader('Accept-Language', '');
        $this->setHeader('User-Agent', '');
        
        $savedProto = $this->protocol;
        $this->protocol = 'HTTP/1.0';
        $this->request('HEAD');
        $this->protocol = $savedProto;
        
        return $this->getHeaders();
    }

    /**
     *
     * {@inheritdoc}
     * @see \Generics\Streams\HttpStream::appendPayload()
     */
    public function appendPayload(InputStream $payload)
    {
        while ($payload->ready()) {
            $this->payload->write($payload->read(1024));
        }
    }

    /**
     *
     * {@inheritdoc}
     * @see \Generics\Streams\HttpStream::getPayload()
     */
    public function getPayload(): InputOutputStream
    {
        return $this->payload;
    }

    /**
     * Set connection timeout in seconds
     *
     * @param int $timeout
     */
    public function setTimeout($timeout)
    {
        $timeout = intval($timeout);
        if ($timeout < 1 || $timeout > 60) {
            $timeout = 5;
        }
        $this->timeout = $timeout;
    }

    /**
     *
     * {@inheritdoc}
     * @see \Generics\Resettable::reset()
     */
    public function reset()
    {
        if (null == $this->payload) {
            $this->payload = new MemoryStream();
        }
        $this->payload->reset();
    }

    /**
     * Prepare the request buffer
     *
     * @param string $requestType
     * @return \Generics\Streams\MemoryStream
     * @throws \Generics\Streams\StreamException
     */
    private function prepareRequest($requestType): MemoryStream
    {
        $ms = new MemoryStream();
        
        // First send the request type
        $ms->interpolate("{rqtype} {path}{query} {proto}\r\n", array(
            'rqtype' => $requestType,
            'path' => $this->path,
            'proto' => $this->protocol,
            'query' => (strlen($this->queryString) ? '?' . $this->queryString : '')
        ));
        
        // Add the host part
        $ms->interpolate("Host: {host}\r\n", array(
            'host' => $this->getEndpoint()
                ->getAddress()
        ));
        
        $this->adjustHeaders($requestType);
        
        // Add all existing headers
        foreach ($this->getHeaders() as $headerName => $headerValue) {
            if (isset($headerValue) && strlen($headerValue) > 0) {
                $ms->interpolate("{headerName}: {headerValue}\r\n", array(
                    'headerName' => $headerName,
                    'headerValue' => $headerValue
                ));
            }
        }
        
        $ms->write("\r\n");
        
        return $ms;
    }

    /**
     * Set the query string
     *
     * @param string $queryString
     */
    public function setQueryString(string $queryString)
    {
        $this->queryString = $queryString;
    }

    /**
     * Retrieve and parse the response
     *
     * @param string $requestType
     * @throws \Generics\Client\HttpException
     * @throws \Generics\Socket\SocketException
     * @throws \Generics\Streams\StreamException
     */
    private function retrieveAndParseResponse($requestType)
    {
        $this->payload = new MemoryStream();
        $this->headers = array();
        
        $delimiterFound = false;
        
        $tmp = "";
        $numBytes = 1;
        $start = time();
        while (true) {
            if (! $this->checkConnection($start)) {
                continue;
            }
            
            $c = $this->read($numBytes);
            
            if ($c == null) {
                break;
            }
            
            $start = time(); // we have readen something => adjust timeout start point
            $tmp .= $c;
            
            if (! $delimiterFound) {
                $this->handleHeader($delimiterFound, $numBytes, $tmp);
            }
            
            if ($delimiterFound) {
                if ($requestType == 'HEAD') {
                    // Header readen, in type HEAD it is now time to leave
                    break;
                }
                
                // delimiter already found, append to payload
                $this->payload->write($tmp);
                $tmp = "";
                
                if ($this->checkContentLengthExceeded()) {
                    break;
                }
            }
        }
        
        $size = $this->payload->count();
        if ($size == 0) {
            return;
        }
        // Set pointer to start
        $this->payload->reset();
        
        $mayCompressed = $this->payload->read($size);
        switch ($this->getContentEncoding()) {
            case 'gzip':
                $uncompressed = gzdecode(strstr($mayCompressed, "\x1f\x8b"));
                $this->payload->flush();
                $this->payload->write($uncompressed);
                break;
            
            case 'deflate':
                $uncompressed = gzuncompress($mayCompressed);
                $this->payload->flush();
                $this->payload->write($uncompressed);
                break;
            
            default:
                // nothing
                break;
        }
        $this->payload->reset();
    }

    /**
     * Append the payload buffer to the request buffer
     *
     * @param MemoryStream $ms
     * @return MemoryStream
     * @throws \Generics\Streams\StreamException
     * @throws \Generics\ResetException
     */
    private function appendPayloadToRequest(MemoryStream $ms): MemoryStream
    {
        $this->payload->reset();
        
        while ($this->payload->ready()) {
            $ms->write($this->payload->read(1024));
        }
        
        $ms->reset();
        
        return $ms;
    }

    /**
     * Handle a header line
     *
     * All parameters by reference, which means the the values can be
     * modified during execution of this method.
     *
     * @param boolean $delimiterFound
     *            Whether the delimiter for end of header section was found
     * @param int $numBytes
     *            The number of bytes to read from remote
     * @param string $tmp
     *            The current readen line
     */
    private function handleHeader(&$delimiterFound, &$numBytes, &$tmp)
    {
        if ($tmp == "\r\n") {
            $numBytes = $this->adjustNumbytes($numBytes);
            $delimiterFound = true;
            $tmp = "";
            return;
        }
        
        if (substr($tmp, - 2, 2) == "\r\n") {
            $this->addParsedHeader($tmp);
            $tmp = "";
        }
    }

    /**
     * Perform the request
     *
     * @param string $requestType
     */
    private function requestImpl(string $requestType)
    {
        if ($requestType == 'HEAD') {
            $this->setTimeout(1); // Don't wait too long on simple head
        }
        
        $ms = $this->prepareRequest($requestType);
        
        $ms = $this->appendPayloadToRequest($ms);
        
        if (! $this->isConnected()) {
            $this->connect();
        }
        
        while ($ms->ready()) {
            $this->write($ms->read(1024));
        }
        
        $this->retrieveAndParseResponse($requestType);
        
        if ($this->getHeader('Connection') == 'close') {
            $this->disconnect();
        }
    }

    /**
     * Check the connection availability
     *
     * @param int $start
     *            Timestamp when read request attempt starts
     * @throws HttpException
     * @return bool
     */
    private function checkConnection($start): bool
    {
        if (! $this->ready()) {
            if (time() - $start > $this->timeout) {
                $this->disconnect();
                throw new HttpException("Connection timed out!");
            }
            
            return false;
        }
        
        return true;
    }

    /**
     * Check whether the readen bytes amount has reached the
     * content length amount
     *
     * @return bool
     */
    private function checkContentLengthExceeded(): bool
    {
        if (isset($this->headers['Content-Length'])) {
            if ($this->payload->count() >= $this->headers['Content-Length']) {
                return true;
            }
        }
        return false;
    }

    /**
     * Set the used protocol
     *
     * @param string $protocol
     */
    private function setProtocol(string $protocol)
    {
        $this->protocol = $protocol;
    }

    /**
     * Set the path on remote server
     *
     * @param string $path
     */
    private function setPath(string $path)
    {
        $this->path = $path;
    }

    /**
     *
     * {@inheritdoc}
     * @see \Generics\Streams\HttpStream::request()
     */
    abstract public function request(string $requestType);

    /**
     * Get the socket endpoint
     *
     * @return \Generics\Socket\Endpoint
     */
    abstract public function getEndpoint(): Endpoint;

    /**
     *
     * {@inheritdoc}
     * @see \Generics\Streams\InputStream::read()
     */
    abstract public function read($length = 1, $offset = null): string;

    /**
     * Whether the client is connected
     *
     * @return bool
     */
    abstract public function isConnected(): bool;
    
    /**
     * Connect to remote endpoint
     *
     * @throws SocketException
     */
    abstract public function connect();
    
    /**
     * Disconnects the socket
     *
     * @throws SocketException
     */
    abstract public function disconnect();
    
    /**
     *
     * {@inheritdoc}
     * @see \Generics\Streams\OutputStream::write()
     */
    abstract public function write($buffer);
    
    /**
     *
     * {@inheritdoc}
     * @see \Generics\Streams\Stream::ready()
     */
    abstract public function ready(): bool;
}


1		<?php
2		/**
3		* This file is part of the PHP Generics package.
4		*
5		* @package Generics
6		*/
7		namespace Generics\Client;
8
9		use Generics\Streams\InputOutputStream;
10		use Generics\Streams\InputStream;
11		use Generics\Streams\MemoryStream;
12		use Generics\Socket\Endpoint;
13		use Generics\Socket\SocketException;
14
15		/**
16		* This trait provides common http(s) client functionality
17		*
18		* @author Maik Greubel <[email protected]>
19		*/
20		trait HttpClientTrait
21		{
22		use HttpHeadersTrait;
23
24		/**
25		* The query string
26		*
27		* @var string
28		*/
29		private $queryString;
30
31		/**
32		* The payload
33		*
34		* @var MemoryStream
35		*/
36		private $payload;
37
38		/**
39		* The HTTP protocol version
40		*
41		* @var string
42		*/
43		private $protocol;
44
45		/**
46		* Path to file on server (excluding endpoint address)
47		*
48		* @var string
49		*/
50		private $path;
51
52		/**
53		* When the connection times out (in seconds)
54		*
55		* @var int
56		*/
57		private $timeout;
58
59		/**
60		* Load headers from remote and return it
61		*
62		* @return array
63		*/
64	2	public function retrieveHeaders(): array
65		{
66	2	$this->setHeader('Connection', 'close');
67	2	$this->setHeader('Accept', '');
68	2	$this->setHeader('Accept-Language', '');
69	2	$this->setHeader('User-Agent', '');
70
71	2	$savedProto = $this->protocol;
72	2	$this->protocol = 'HTTP/1.0';
73	2	$this->request('HEAD');
74	2	$this->protocol = $savedProto;
75
76	2	return $this->getHeaders();
77		}
78
79		/**
80		*
81		* {@inheritdoc}
82		* @see \Generics\Streams\HttpStream::appendPayload()
83		*/
84	2	public function appendPayload(InputStream $payload)
85		{
86	2	while ($payload->ready()) {
87	2	$this->payload->write($payload->read(1024));
88		}
89	2	}
90
91		/**
92		*
93		* {@inheritdoc}
94		* @see \Generics\Streams\HttpStream::getPayload()
95		*/
96	8	public function getPayload(): InputOutputStream
97		{
98	8	return $this->payload;
99		}
100
101		/**
102		* Set connection timeout in seconds
103		*
104		* @param int $timeout
105		*/
106	25	public function setTimeout($timeout)
107		{
108	25	$timeout = intval($timeout);
109	25	if ($timeout < 1 \|\| $timeout > 60) {
110	2	$timeout = 5;
111		}
112	25	$this->timeout = $timeout;
113	25	}
114
115		/**
116		*
117		* {@inheritdoc}
118		* @see \Generics\Resettable::reset()
119		*/
120	25	public function reset()
121		{
122	25	if (null == $this->payload) {
123	25	$this->payload = new MemoryStream();
124		}
125	25	$this->payload->reset();
126	25	}
127
128		/**
129		* Prepare the request buffer
130		*
131		* @param string $requestType
132		* @return \Generics\Streams\MemoryStream
133		* @throws \Generics\Streams\StreamException
134		*/
135	22	private function prepareRequest($requestType): MemoryStream
136		{
137	22	$ms = new MemoryStream();
138
139		// First send the request type
140	22	$ms->interpolate("{rqtype} {path}{query} {proto}\r\n", array(
141	22	'rqtype' => $requestType,
142	22	'path' => $this->path,
143	22	'proto' => $this->protocol,
144	22	'query' => (strlen($this->queryString) ? '?' . $this->queryString : '')
145		));
146
147		// Add the host part
148	22	$ms->interpolate("Host: {host}\r\n", array(
149	22	'host' => $this->getEndpoint()
150	22	->getAddress()
151		));
152
153	22	$this->adjustHeaders($requestType);
154
155		// Add all existing headers
156	22	foreach ($this->getHeaders() as $headerName => $headerValue) {
157	22	if (isset($headerValue) && strlen($headerValue) > 0) {
158	22	$ms->interpolate("{headerName}: {headerValue}\r\n", array(
159	22	'headerName' => $headerName,
160	22	'headerValue' => $headerValue
161		));
162		}
163		}
164
165	22	$ms->write("\r\n");
166
167	22	return $ms;
168		}
169
170		/**
171		* Set the query string
172		*
173		* @param string $queryString
174		*/
175	25	public function setQueryString(string $queryString)
176		{
177	25	$this->queryString = $queryString;
178	25	}
179
180		/**
181		* Retrieve and parse the response
182		*
183		* @param string $requestType
184		* @throws \Generics\Client\HttpException
185		* @throws \Generics\Socket\SocketException
186		* @throws \Generics\Streams\StreamException
187		*/
188	20	private function retrieveAndParseResponse($requestType)
189		{
190	20	$this->payload = new MemoryStream();
191	20	$this->headers = array();
192
193	20	$delimiterFound = false;
194
195	20	$tmp = "";
196	20	$numBytes = 1;
197	20	$start = time();
198	20	while (true) {
199	20	if (! $this->checkConnection($start)) {
200	20	continue;
201		}
202
203	18	$c = $this->read($numBytes);
204
205	18	if ($c == null) {
206		break;
207		}
208
209	18	$start = time(); // we have readen something => adjust timeout start point
210	18	$tmp .= $c;
211
212	18	if (! $delimiterFound) {
213	18	$this->handleHeader($delimiterFound, $numBytes, $tmp);
214		}
215
216	18	if ($delimiterFound) {
217	18	if ($requestType == 'HEAD') {
218		// Header readen, in type HEAD it is now time to leave
219	4	break;
220		}
221
222		// delimiter already found, append to payload
223	14	$this->payload->write($tmp);
224	14	$tmp = "";
225
226	14	if ($this->checkContentLengthExceeded()) {
227	14	break;
228		}
229		}
230		}
231
232	18	$size = $this->payload->count();
233	18	if ($size == 0) {
234	4	return;
235		}
236		// Set pointer to start
237	14	$this->payload->reset();
238
239	14	$mayCompressed = $this->payload->read($size);
240	14	switch ($this->getContentEncoding()) {
241	14	case 'gzip':
242	2	$uncompressed = gzdecode(strstr($mayCompressed, "\x1f\x8b"));
243	2	$this->payload->flush();
244	2	$this->payload->write($uncompressed);
245	2	break;
246
247	12	case 'deflate':
248	2	$uncompressed = gzuncompress($mayCompressed);
249	2	$this->payload->flush();
250	2	$this->payload->write($uncompressed);
251	2	break;
252
253		default:
254		// nothing
255	10	break;
256		}
257	14	$this->payload->reset();
258	14	}
259
260		/**
261		* Append the payload buffer to the request buffer
262		*
263		* @param MemoryStream $ms
264		* @return MemoryStream
265		* @throws \Generics\Streams\StreamException
266		* @throws \Generics\ResetException
267		*/
268	22	private function appendPayloadToRequest(MemoryStream $ms): MemoryStream
269		{
270	22	$this->payload->reset();
271
272	22	while ($this->payload->ready()) {
273	22	$ms->write($this->payload->read(1024));
274		}
275
276	22	$ms->reset();
277
278	22	return $ms;
279		}
280
281		/**
282		* Handle a header line
283		*
284		* All parameters by reference, which means the the values can be
285		* modified during execution of this method.
286		*
287		* @param boolean $delimiterFound
288		* Whether the delimiter for end of header section was found
289		* @param int $numBytes
290		* The number of bytes to read from remote
291		* @param string $tmp
292		* The current readen line
293		*/
294	18	private function handleHeader(&$delimiterFound, &$numBytes, &$tmp)
295		{
296	18	if ($tmp == "\r\n") {
297	18	$numBytes = $this->adjustNumbytes($numBytes);
298	18	$delimiterFound = true;
299	18	$tmp = "";
300	18	return;
301		}
302
303	18	if (substr($tmp, - 2, 2) == "\r\n") {
304	18	$this->addParsedHeader($tmp);
305	18	$tmp = "";
306		}
307	18	}
308
309		/**
310		* Perform the request
311		*
312		* @param string $requestType
313		*/
314	22	private function requestImpl(string $requestType)
315		{
316	22	if ($requestType == 'HEAD') {
317	4	$this->setTimeout(1); // Don't wait too long on simple head
318		}
319
320	22	$ms = $this->prepareRequest($requestType);
321
322	22	$ms = $this->appendPayloadToRequest($ms);
323
324	22	if (! $this->isConnected()) {
325	20	$this->connect();
326		}
327
328	21	while ($ms->ready()) {
329	21	$this->write($ms->read(1024));
330		}
331
332	20	$this->retrieveAndParseResponse($requestType);
333
334	18	if ($this->getHeader('Connection') == 'close') {
335	6	$this->disconnect();
336		}
337	18	}
338
339		/**
340		* Check the connection availability
341		*
342		* @param int $start
343		* Timestamp when read request attempt starts
344		* @throws HttpException
345		* @return bool
346		*/
347	20	private function checkConnection($start): bool
348		{
349	20	if (! $this->ready()) {
350	20	if (time() - $start > $this->timeout) {
351	2	$this->disconnect();
352	2	throw new HttpException("Connection timed out!");
353		}
354
355	20	return false;
356		}
357
358	18	return true;
359		}
360
361		/**
362		* Check whether the readen bytes amount has reached the
363		* content length amount
364		*
365		* @return bool
366		*/
367	14	private function checkContentLengthExceeded(): bool
368		{
369	14	if (isset($this->headers['Content-Length'])) {
370	14	if ($this->payload->count() >= $this->headers['Content-Length']) {
371	14	return true;
372		}
373		}
374	14	return false;
375		}
376
377		/**
378		* Set the used protocol
379		*
380		* @param string $protocol
381		*/
382	25	private function setProtocol(string $protocol)
383		{
384	25	$this->protocol = $protocol;
385	25	}
386
387		/**
388		* Set the path on remote server
389		*
390		* @param string $path
391		*/
392	25	private function setPath(string $path)
393		{
394	25	$this->path = $path;
395	25	}
396
397		/**
398		*
399		* {@inheritdoc}
400		* @see \Generics\Streams\HttpStream::request()
401		*/
402		abstract public function request(string $requestType);
403
404		/**
405		* Get the socket endpoint
406		*
407		* @return \Generics\Socket\Endpoint
408		*/
409		abstract public function getEndpoint(): Endpoint;
410
411		/**
412		*
413		* {@inheritdoc}
414		* @see \Generics\Streams\InputStream::read()
415		*/
416		abstract public function read($length = 1, $offset = null): string;
417
418		/**
419		* Whether the client is connected
420		*
421		* @return bool
422		*/
423		abstract public function isConnected(): bool;
424
425		/**
426		* Connect to remote endpoint
427		*
428		* @throws SocketException
429		*/
430		abstract public function connect();
431
432		/**
433		* Disconnects the socket
434		*
435		* @throws SocketException
436		*/
437		abstract public function disconnect();
438
439		/**
440		*
441		* {@inheritdoc}
442		* @see \Generics\Streams\OutputStream::write()
443		*/
444		abstract public function write($buffer);
445
446		/**
447		*
448		* {@inheritdoc}
449		* @see \Generics\Streams\Stream::ready()
450		*/
451		abstract public function ready(): bool;
452		}
453

maikgreubel / phpgenerics

HttpClientTrait::checkConnection() A last analyzed 2018-11-11 05:34 UTC

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HttpClientTrait::checkConnection() A
last analyzed 2018-11-11 05:34 UTC