AbstractCsv::sendHeaders() - Code Metrics - Inspection of "bug fixes #250 and #251" - thephpleague/csv - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( c2ce6a...013468 )

by ignace nyamagana

created 2017-08-30 10:08 UTC

AbstractCsv::sendHeaders() B

↳ Parent: AbstractCsv

Complexity

Conditions	4
Paths	5

Size

Total Lines	25
Code Lines	16

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	17
CRAP Score	4

Importance

Changes

Metric	Value
cc	4
eloc	16
nc	5
nop	1
dl	0
loc	25
ccs	17
cts	17
cp	1
crap	4
rs	8.5806
c	0
b	0
f	0

<?php
/**
* This file is part of the League.csv library
*
* @license http://opensource.org/licenses/MIT
* @link https://github.com/thephpleague/csv/
* @version 9.0.1
* @package League.csv
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);

namespace League\Csv;

use Generator;
use SplFileObject;
use function League\Csv\bom_match;

/**
 * An abstract class to enable CSV document loading.
 *
 * @package League.csv
 * @since   4.0.0
 * @author  Ignace Nyamagana Butera <[email protected]>
 */
abstract class AbstractCsv implements ByteSequence
{
    /**
     * The stream filter mode (read or write)
     *
     * @var int
     */
    protected $stream_filter_mode;


    /**
     * collection of stream filters
     *
     * @var bool[]
     */
    protected $stream_filters = [];

    /**
     * The CSV document BOM sequence
     *
     * @var string|null
     */
    protected $input_bom = null;

    /**
     * The Output file BOM character
     *
     * @var string
     */
    protected $output_bom = '';

    /**
     * the field delimiter (one character only)
     *
     * @var string
     */
    protected $delimiter = ',';

    /**
     * the field enclosure character (one character only)
     *
     * @var string
     */
    protected $enclosure = '"';

    /**
     * the field escape character (one character only)
     *
     * @var string
     */
    protected $escape = '\\';

    /**
     * The CSV document
     *
     * @var SplFileObject|Stream
     */
    protected $document;

    /**
     * New instance
     *
     * @param SplFileObject|Stream $document The CSV Object instance
     */
    protected function __construct($document)
    {
        $this->document = $document;
        list($this->delimiter, $this->enclosure, $this->escape) = $this->document->getCsvControl();
    }

    /**
     * @inheritdoc
     */
    public function __destruct()
    {
        unset($this->document);
    }

    /**
     * @inheritdoc
     */
    public function __clone()
    {
        throw new Exception(sprintf('An object of class %s cannot be cloned', get_class($this)));
    }

    /**
     * Return a new instance from a SplFileObject
     *
     * @param SplFileObject $file
     *
     * @return static
     */
    public static function createFromFileObject(SplFileObject $file): self
    {
        return new static($file);
    }

    /**
     * Return a new instance from a PHP resource stream
     *
     * @param resource $stream
     *
     * @return static
     */
    public static function createFromStream($stream): self
    {
        return new static(new Stream($stream));
    }

    /**
     * Return a new instance from a string
     *
     * @param string $content the CSV document as a string
     *
     * @return static
     */
    public static function createFromString(string $content): self
    {
        return new static(Stream::createFromString($content));
    }

    /**
     * Return a new instance from a file path
     *
     * @param string        $path      file path
     * @param string        $open_mode the file open mode flag
     * @param resource|null $context   the resource context
     *
     * @return static
     */
    public static function createFromPath(string $path, string $open_mode = 'r+', $context = null): self
    {
        return new static(Stream::createFromPath($path, $open_mode, $context));
    }

    /**
     * Returns the current field delimiter
     *
     * @return string
     */
    public function getDelimiter(): string
    {
        return $this->delimiter;
    }

    /**
     * Returns the current field enclosure
     *
     * @return string
     */
    public function getEnclosure(): string
    {
        return $this->enclosure;
    }

    /**
     * Returns the current field escape character
     *
     * @return string
     */
    public function getEscape(): string
    {
        return $this->escape;
    }

    /**
     * Returns the BOM sequence in use on Output methods
     *
     * @return string
     */
    public function getOutputBOM(): string
    {
        return $this->output_bom;
    }

    /**
     * Returns the BOM sequence of the given CSV
     *
     * @return string
     */
    public function getInputBOM(): string
    {
        if (null !== $this->input_bom) {
            return $this->input_bom;
        }

        $this->document->setFlags(SplFileObject::READ_CSV);
        $this->document->setCsvControl($this->delimiter, $this->enclosure, $this->escape);
        $this->document->rewind();
        $this->input_bom = bom_match(implode(',', (array) $this->document->current()));

        return $this->input_bom;
    }

    /**
     * Returns the stream filter mode
     *
     * @return int
     */
    public function getStreamFilterMode(): int
    {
        return $this->stream_filter_mode;
    }

    /**
     * Tells whether the stream filter capabilities can be used
     *
     * @return bool
     */
    public function supportsStreamFilter(): bool
    {
        return $this->document instanceof Stream;
    }

    /**
     * Tell whether the specify stream filter is attach to the current stream
     *
     * @param string $filtername
     *
     * @return bool
     */
    public function hasStreamFilter(string $filtername): bool
    {
        return $this->stream_filters[$filtername] ?? false;
    }

    /**
     * Retrieves the CSV content
     *
     * @return string
     */
    public function __toString(): string
    {
        $raw = '';
        foreach ($this->chunk(8192) as $chunk) {
            $raw .= $chunk;
        }

        return $raw;
    }

    /**
     * Retuns the CSV document as a Generator of string chunk
     *
     * @param int $length number of bytes read
     *
     * @return Generator
     */
    public function chunk(int $length): Generator
    {
        if ($length < 1) {
            throw new Exception(sprintf('%s() expects the length to be a positive integer %d given', __METHOD__, $length));
        }

        $input_bom = $this->getInputBOM();
        $this->document->rewind();
        $this->document->fseek(strlen($input_bom));
        foreach (str_split($this->output_bom.$this->document->fread($length), $length) as $chunk) {
            yield $chunk;
        }

        while ($this->document->valid()) {
            yield $this->document->fread($length);
        }
    }

    /**
     * Outputs all data on the CSV file
     *
     * @param string $filename CSV downloaded name if present adds extra headers
     *
     * @return int Returns the number of characters read from the handle
     *             and passed through to the output.
     */
    public function output(string $filename = null): int
    {
        if (null !== $filename) {
            $this->sendHeaders($filename);
        }
        $input_bom = $this->getInputBOM();
        $this->document->rewind();
        $this->document->fseek(strlen($input_bom));
        echo $this->output_bom;

        return strlen($this->output_bom) + $this->document->fpassthru();
    }

    /**
     * Send the CSV headers
     *
     * Adapted from Symfony\Component\HttpFoundation\ResponseHeaderBag::makeDisposition
     *
     * @param string|null $filename CSV disposition name
     *
     * @throws Exception if the submitted header is invalid according to RFC 6266
     *
     * @see https://tools.ietf.org/html/rfc6266#section-4.3
     */
    protected function sendHeaders(string $filename)
    {
        if (strlen($filename) != strcspn($filename, '\\/')) {
            throw new Exception('The filename cannot contain the "/" and "\\" characters.');
        }

        $flag = FILTER_FLAG_STRIP_LOW;
        if (strlen($filename) !== mb_strlen($filename)) {
            $flag |= FILTER_FLAG_STRIP_HIGH;
        }

        $filenameFallback = filter_var($filename, FILTER_SANITIZE_STRING, $flag);
        $filenameFallback = str_replace('%', '', $filenameFallback);

        $disposition = sprintf('attachment; filename="%s"', str_replace('"', '\\"', $filenameFallback));
        if ($filename !== $filenameFallback) {
            $disposition .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
        }
        $disposition .= '; modification-date="'.date('r').'"';

        header('Content-Type: text/csv');
        header('Content-Transfer-Encoding: binary');
        header('Content-Description: File Transfer');
        header('Content-Disposition: '.$disposition);
    }

    /**
     * Sets the field delimiter
     *
     * @param string $delimiter
     *
     * @throws Exception If the Csv control character is not one character only.
     *
     * @return static
     */
    public function setDelimiter(string $delimiter): self
    {
        if ($delimiter === $this->delimiter) {
            return $this;
        }

        if (1 === strlen($delimiter)) {
            $this->delimiter = $delimiter;
            $this->resetProperties();

            return $this;
        }

        throw new Exception(sprintf('%s() expects delimiter to be a single character %s given', __METHOD__, $delimiter));
    }

    /**
     * Reset dynamic object properties to improve performance
     */
    protected function resetProperties()
    {
    }

    /**
     * Sets the field enclosure
     *
     * @param string $enclosure
     *
     * @throws Exception If the Csv control character is not one character only.
     *
     * @return static
     */
    public function setEnclosure(string $enclosure): self
    {
        if ($enclosure === $this->enclosure) {
            return $this;
        }

        if (1 === strlen($enclosure)) {
            $this->enclosure = $enclosure;
            $this->resetProperties();

            return $this;
        }

        throw new Exception(sprintf('%s() expects enclosure to be a single character %s given', __METHOD__, $enclosure));
    }

    /**
     * Sets the field escape character
     *
     * @param string $escape
     *
     * @throws Exception If the Csv control character is not one character only.
     *
     * @return static
     */
    public function setEscape(string $escape): self
    {
        if ($escape === $this->escape) {
            return $this;
        }

        if (1 === strlen($escape)) {
            $this->escape = $escape;
            $this->resetProperties();

            return $this;
        }

        throw new Exception(sprintf('%s() expects escape to be a single character %s given', __METHOD__, $escape));
    }

    /**
     * Sets the BOM sequence to prepend the CSV on output
     *
     * @param string $str The BOM sequence
     *
     * @return static
     */
    public function setOutputBOM(string $str): self
    {
        $this->output_bom = $str;

        return $this;
    }

    /**
     * append a stream filter
     *
     * @param string $filtername a string or an object that implements the '__toString' method
     * @param mixed  $params     additional parameters for the filter
     *
     * @throws Exception If the stream filter API can not be used
     *
     * @return static
     */
    public function addStreamFilter(string $filtername, $params = null): self
    {
        if (!$this->document instanceof Stream) {
            throw new Exception('The stream filter API can not be used');
        }

        $this->document->appendFilter($filtername, $this->stream_filter_mode, $params);
        $this->stream_filters[$filtername] = true;
        $this->resetProperties();
        $this->input_bom = null;

        return $this;
    }
}


1		<?php
2		/**
3		* This file is part of the League.csv library
4		*
5		* @license http://opensource.org/licenses/MIT
6		* @link https://github.com/thephpleague/csv/
7		* @version 9.0.1
8		* @package League.csv
9		*
10		* For the full copyright and license information, please view the LICENSE
11		* file that was distributed with this source code.
12		*/
13		declare(strict_types=1);
14
15		namespace League\Csv;
16
17		use Generator;
18		use SplFileObject;
19		use function League\Csv\bom_match;
20
21		/**
22		* An abstract class to enable CSV document loading.
23		*
24		* @package League.csv
25		* @since 4.0.0
26		* @author Ignace Nyamagana Butera <[email protected]>
27		*/
28		abstract class AbstractCsv implements ByteSequence
29		{
30		/**
31		* The stream filter mode (read or write)
32		*
33		* @var int
34		*/
35		protected $stream_filter_mode;
36
37
38		/**
39		* collection of stream filters
40		*
41		* @var bool[]
42		*/
43		protected $stream_filters = [];
44
45		/**
46		* The CSV document BOM sequence
47		*
48		* @var string\|null
49		*/
50		protected $input_bom = null;
51
52		/**
53		* The Output file BOM character
54		*
55		* @var string
56		*/
57		protected $output_bom = '';
58
59		/**
60		* the field delimiter (one character only)
61		*
62		* @var string
63		*/
64		protected $delimiter = ',';
65
66		/**
67		* the field enclosure character (one character only)
68		*
69		* @var string
70		*/
71		protected $enclosure = '"';
72
73		/**
74		* the field escape character (one character only)
75		*
76		* @var string
77		*/
78		protected $escape = '\\';
79
80		/**
81		* The CSV document
82		*
83		* @var SplFileObject\|Stream
84		*/
85		protected $document;
86
87		/**
88		* New instance
89		*
90		* @param SplFileObject\|Stream $document The CSV Object instance
91		*/
92	22	protected function __construct($document)
93		{
94	22	$this->document = $document;
95	22	list($this->delimiter, $this->enclosure, $this->escape) = $this->document->getCsvControl();
96	22	}
97
98		/**
99		* @inheritdoc
100		*/
101	24	public function __destruct()
102		{
103	24	unset($this->document);
104	24	}
105
106		/**
107		* @inheritdoc
108		*/
109	2	public function __clone()
110		{
111	2	throw new Exception(sprintf('An object of class %s cannot be cloned', get_class($this)));
112		}
113
114		/**
115		* Return a new instance from a SplFileObject
116		*
117		* @param SplFileObject $file
118		*
119		* @return static
120		*/
121	24	public static function createFromFileObject(SplFileObject $file): self
122		{
123	24	return new static($file);
124		}
125
126		/**
127		* Return a new instance from a PHP resource stream
128		*
129		* @param resource $stream
130		*
131		* @return static
132		*/
133	4	public static function createFromStream($stream): self
134		{
135	4	return new static(new Stream($stream));
136		}
137
138		/**
139		* Return a new instance from a string
140		*
141		* @param string $content the CSV document as a string
142		*
143		* @return static
144		*/
145	4	public static function createFromString(string $content): self
146		{
147	4	return new static(Stream::createFromString($content));
148		}
149
150		/**
151		* Return a new instance from a file path
152		*
153		* @param string $path file path
154		* @param string $open_mode the file open mode flag
155		* @param resource\|null $context the resource context
156		*
157		* @return static
158		*/
159	4	public static function createFromPath(string $path, string $open_mode = 'r+', $context = null): self
160		{
161	4	return new static(Stream::createFromPath($path, $open_mode, $context));
162		}
163
164		/**
165		* Returns the current field delimiter
166		*
167		* @return string
168		*/
169	10	public function getDelimiter(): string
170		{
171	10	return $this->delimiter;
172		}
173
174		/**
175		* Returns the current field enclosure
176		*
177		* @return string
178		*/
179	2	public function getEnclosure(): string
180		{
181	2	return $this->enclosure;
182		}
183
184		/**
185		* Returns the current field escape character
186		*
187		* @return string
188		*/
189	2	public function getEscape(): string
190		{
191	2	return $this->escape;
192		}
193
194		/**
195		* Returns the BOM sequence in use on Output methods
196		*
197		* @return string
198		*/
199	2	public function getOutputBOM(): string
200		{
201	2	return $this->output_bom;
202		}
203
204		/**
205		* Returns the BOM sequence of the given CSV
206		*
207		* @return string
208		*/
209	16	public function getInputBOM(): string
210		{
211	16	if (null !== $this->input_bom) {
212	2	return $this->input_bom;
213		}
214
215	16	$this->document->setFlags(SplFileObject::READ_CSV);
216	16	$this->document->setCsvControl($this->delimiter, $this->enclosure, $this->escape);
217	16	$this->document->rewind();
218	16	$this->input_bom = bom_match(implode(',', (array) $this->document->current()));
219
220	16	return $this->input_bom;
221		}
222
223		/**
224		* Returns the stream filter mode
225		*
226		* @return int
227		*/
228	2	public function getStreamFilterMode(): int
229		{
230	2	return $this->stream_filter_mode;
231		}
232
233		/**
234		* Tells whether the stream filter capabilities can be used
235		*
236		* @return bool
237		*/
238	4	public function supportsStreamFilter(): bool
239		{
240	4	return $this->document instanceof Stream;
241		}
242
243		/**
244		* Tell whether the specify stream filter is attach to the current stream
245		*
246		* @param string $filtername
247		*
248		* @return bool
249		*/
250	2	public function hasStreamFilter(string $filtername): bool
251		{
252	2	return $this->stream_filters[$filtername] ?? false;
253		}
254
255		/**
256		* Retrieves the CSV content
257		*
258		* @return string
259		*/
260	12	public function __toString(): string
261		{
262	12	$raw = '';
263	12	foreach ($this->chunk(8192) as $chunk) {
264	12	$raw .= $chunk;
265		}
266
267	12	return $raw;
268		}
269
270		/**
271		* Retuns the CSV document as a Generator of string chunk
272		*
273		* @param int $length number of bytes read
274		*
275		* @return Generator
276		*/
277	10	public function chunk(int $length): Generator
278		{
279	10	if ($length < 1) {
280	2	throw new Exception(sprintf('%s() expects the length to be a positive integer %d given', __METHOD__, $length));
281		}
282
283	8	$input_bom = $this->getInputBOM();
284	8	$this->document->rewind();
285	8	$this->document->fseek(strlen($input_bom));
286	8	foreach (str_split($this->output_bom.$this->document->fread($length), $length) as $chunk) {
287	8	yield $chunk;
288		}
289
290	8	while ($this->document->valid()) {
291	6	yield $this->document->fread($length);
292		}
293	8	}
294
295		/**
296		* Outputs all data on the CSV file
297		*
298		* @param string $filename CSV downloaded name if present adds extra headers
299		*
300		* @return int Returns the number of characters read from the handle
301		* and passed through to the output.
302		*/
303	6	public function output(string $filename = null): int
304		{
305	6	if (null !== $filename) {
306	6	$this->sendHeaders($filename);
307		}
308	4	$input_bom = $this->getInputBOM();
309	4	$this->document->rewind();
310	4	$this->document->fseek(strlen($input_bom));
311	4	echo $this->output_bom;
312
313	4	return strlen($this->output_bom) + $this->document->fpassthru();
314		}
315
316		/**
317		* Send the CSV headers
318		*
319		* Adapted from Symfony\Component\HttpFoundation\ResponseHeaderBag::makeDisposition
320		*
321		* @param string\|null $filename CSV disposition name
322		*
323		* @throws Exception if the submitted header is invalid according to RFC 6266
324		*
325		* @see https://tools.ietf.org/html/rfc6266#section-4.3
326		*/
327	6	protected function sendHeaders(string $filename)
328		{
329	6	if (strlen($filename) != strcspn($filename, '\\/')) {
330	2	throw new Exception('The filename cannot contain the "/" and "\\" characters.');
331		}
332
333	4	$flag = FILTER_FLAG_STRIP_LOW;
334	4	if (strlen($filename) !== mb_strlen($filename)) {
335	2	$flag \|= FILTER_FLAG_STRIP_HIGH;
336		}
337
338	4	$filenameFallback = filter_var($filename, FILTER_SANITIZE_STRING, $flag);
339	4	$filenameFallback = str_replace('%', '', $filenameFallback);
340
341	4	$disposition = sprintf('attachment; filename="%s"', str_replace('"', '\\"', $filenameFallback));
342	4	if ($filename !== $filenameFallback) {
343	2	$disposition .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
344		}
345	4	$disposition .= '; modification-date="'.date('r').'"';
346
347	4	header('Content-Type: text/csv');
348	4	header('Content-Transfer-Encoding: binary');
349	4	header('Content-Description: File Transfer');
350	4	header('Content-Disposition: '.$disposition);
351	4	}
352
353		/**
354		* Sets the field delimiter
355		*
356		* @param string $delimiter
357		*
358		* @throws Exception If the Csv control character is not one character only.
359		*
360		* @return static
361		*/
362	12	public function setDelimiter(string $delimiter): self
363		{
364	12	if ($delimiter === $this->delimiter) {
365	6	return $this;
366		}
367
368	10	if (1 === strlen($delimiter)) {
369	10	$this->delimiter = $delimiter;
370	10	$this->resetProperties();
371
372	10	return $this;
373		}
374
375	2	throw new Exception(sprintf('%s() expects delimiter to be a single character %s given', __METHOD__, $delimiter));
376		}
377
378		/**
379		* Reset dynamic object properties to improve performance
380		*/
381	4	protected function resetProperties()
382		{
383	4	}
384
385		/**
386		* Sets the field enclosure
387		*
388		* @param string $enclosure
389		*
390		* @throws Exception If the Csv control character is not one character only.
391		*
392		* @return static
393		*/
394	2	public function setEnclosure(string $enclosure): self
395		{
396	2	if ($enclosure === $this->enclosure) {
397	2	return $this;
398		}
399
400	2	if (1 === strlen($enclosure)) {
401	2	$this->enclosure = $enclosure;
402	2	$this->resetProperties();
403
404	2	return $this;
405		}
406
407	2	throw new Exception(sprintf('%s() expects enclosure to be a single character %s given', __METHOD__, $enclosure));
408		}
409
410		/**
411		* Sets the field escape character
412		*
413		* @param string $escape
414		*
415		* @throws Exception If the Csv control character is not one character only.
416		*
417		* @return static
418		*/
419	2	public function setEscape(string $escape): self
420		{
421	2	if ($escape === $this->escape) {
422	2	return $this;
423		}
424
425	2	if (1 === strlen($escape)) {
426	2	$this->escape = $escape;
427	2	$this->resetProperties();
428
429	2	return $this;
430		}
431
432	2	throw new Exception(sprintf('%s() expects escape to be a single character %s given', __METHOD__, $escape));
433		}
434
435		/**
436		* Sets the BOM sequence to prepend the CSV on output
437		*
438		* @param string $str The BOM sequence
439		*
440		* @return static
441		*/
442	6	public function setOutputBOM(string $str): self
443		{
444	6	$this->output_bom = $str;
445
446	6	return $this;
447		}
448
449		/**
450		* append a stream filter
451		*
452		* @param string $filtername a string or an object that implements the '__toString' method
453		* @param mixed $params additional parameters for the filter
454		*
455		* @throws Exception If the stream filter API can not be used
456		*
457		* @return static
458		*/
459	10	public function addStreamFilter(string $filtername, $params = null): self
460		{
461	10	if (!$this->document instanceof Stream) {
462	2	throw new Exception('The stream filter API can not be used');
463		}
464
465	8	$this->document->appendFilter($filtername, $this->stream_filter_mode, $params);
466	6	$this->stream_filters[$filtername] = true;
467	6	$this->resetProperties();
468	6	$this->input_bom = null;
469
470	6	return $this;
471		}
472		}
473

thephpleague / csv

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AbstractCsv::sendHeaders() B

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