NativeReadStream::stream_read() - Code Metrics - Inspection of "move backends into their own namespace and add sup..." - icewind1991/SMB - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 228057...4623d7 )

by Robin

created 2018-03-13 17:12 UTC

NativeReadStream::stream_read() A

↳ Parent: NativeReadStream

Complexity

Conditions	3
Paths	2

Size

Total Lines	21
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	21
rs	9.3142
c	0
b	0
f	0
cc	3
eloc	13
nc	2
nop	1

<?php
/**
 * Copyright (c) 2014 Robin Appelman <[email protected]>
 * This file is licensed under the Licensed under the MIT license:
 * http://opensource.org/licenses/MIT
 */

namespace Icewind\SMB\Native;

/**
 * Stream optimized for read only usage
 */
class NativeReadStream extends NativeStream {
	const CHUNK_SIZE = 1048576; // 1MB chunks
	/**
	 * @var resource
	 */
	private $readBuffer = null;

	private $bufferSize = 0;

	private $pos = 0;

	public function stream_open($path, $mode, $options, &$opened_path) {
		$this->readBuffer = fopen('php://memory', 'r+');

		return parent::stream_open($path, $mode, $options, $opened_path);

	}

	/**
	 * Wrap a stream from libsmbclient-php into a regular php stream
	 *
	 * @param \Icewind\SMB\NativeState $state
	 * @param resource $smbStream
	 * @param string $mode
	 * @param string $url
	 * @return resource
	 */
	public static function wrap($state, $smbStream, $mode, $url) {

		stream_wrapper_register('nativesmb', '\Icewind\SMB\NativeReadStream');
		$context = stream_context_create(array(
			'nativesmb' => array(
				'state'  => $state,
				'handle' => $smbStream,
				'url'    => $url
			)
		));
		$fh = fopen('nativesmb://', $mode, false, $context);
		stream_wrapper_unregister('nativesmb');
		return $fh;
	}

	public function stream_read($count) {
		// php reads 8192 bytes at once
		// however due to network latency etc, it's faster to read in larger chunks
		// and buffer the result
		if (!parent::stream_eof() && $this->bufferSize < $count) {
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
			$remaining = $this->readBuffer;
			$this->readBuffer = fopen('php://memory', 'r+');
			$this->bufferSize = 0;
			stream_copy_to_stream($remaining, $this->readBuffer);
			$this->bufferSize += fwrite($this->readBuffer, parent::stream_read(self::CHUNK_SIZE));
			fseek($this->readBuffer, 0);
		}

		$result = fread($this->readBuffer, $count);
		$this->bufferSize -= $count;

		$read = strlen($result);
		$this->pos += $read;

		return $result;
	}

	public function stream_seek($offset, $whence = SEEK_SET) {
		$result = parent::stream_seek($offset, $whence);
		if ($result) {
			$this->readBuffer = fopen('php://memory', 'r+');
			$this->bufferSize = 0;
			$this->pos = parent::stream_tell();
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
		}
		return $result;
	}

	public function stream_eof() {
		return $this->bufferSize <= 0 && parent::stream_eof();
	}

	public function stream_tell() {
		return $this->pos;
	}

	public function stream_write($data) {
		return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
	}

	public function stream_truncate($size) {
		return false;
	}
}


1		<?php
2		/**
3		* Copyright (c) 2014 Robin Appelman <[email protected]>
4		* This file is licensed under the Licensed under the MIT license:
5		* http://opensource.org/licenses/MIT
6		*/
7
8		namespace Icewind\SMB\Native;
9
10		/**
11		* Stream optimized for read only usage
12		*/
13		class NativeReadStream extends NativeStream {
14		const CHUNK_SIZE = 1048576; // 1MB chunks
15		/**
16		* @var resource
17		*/
18		private $readBuffer = null;
19
20		private $bufferSize = 0;
21
22		private $pos = 0;
23
24		public function stream_open($path, $mode, $options, &$opened_path) {
25		$this->readBuffer = fopen('php://memory', 'r+');
26
27		return parent::stream_open($path, $mode, $options, $opened_path);
28
29		}
30
31		/**
32		* Wrap a stream from libsmbclient-php into a regular php stream
33		*
34		* @param \Icewind\SMB\NativeState $state
35		* @param resource $smbStream
36		* @param string $mode
37		* @param string $url
38		* @return resource
39		*/
40	View Code Duplication	public static function wrap($state, $smbStream, $mode, $url) {
		0 ignored issues – show Duplication introduced 2017-08-16 14:47 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
41		stream_wrapper_register('nativesmb', '\Icewind\SMB\NativeReadStream');
42		$context = stream_context_create(array(
43		'nativesmb' => array(
44		'state' => $state,
45		'handle' => $smbStream,
46		'url' => $url
47		)
48		));
49		$fh = fopen('nativesmb://', $mode, false, $context);
50		stream_wrapper_unregister('nativesmb');
51		return $fh;
52		}
53
54		public function stream_read($count) {
55		// php reads 8192 bytes at once
56		// however due to network latency etc, it's faster to read in larger chunks
57		// and buffer the result
58		if (!parent::stream_eof() && $this->bufferSize < $count) {
		0 ignored issues – show Comprehensibility Bug introduced 2017-08-16 14:47 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`stream_eof()` instead of `stream_read()`). Are you sure this is correct? If so, you might want to change this to `$this->stream_eof()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
59		$remaining = $this->readBuffer;
60		$this->readBuffer = fopen('php://memory', 'r+');
61		$this->bufferSize = 0;
62		stream_copy_to_stream($remaining, $this->readBuffer);
63		$this->bufferSize += fwrite($this->readBuffer, parent::stream_read(self::CHUNK_SIZE));
64		fseek($this->readBuffer, 0);
65		}
66
67		$result = fread($this->readBuffer, $count);
68		$this->bufferSize -= $count;
69
70		$read = strlen($result);
71		$this->pos += $read;
72
73		return $result;
74		}
75
76		public function stream_seek($offset, $whence = SEEK_SET) {
77		$result = parent::stream_seek($offset, $whence);
78		if ($result) {
79		$this->readBuffer = fopen('php://memory', 'r+');
80		$this->bufferSize = 0;
81		$this->pos = parent::stream_tell();
		0 ignored issues – show Comprehensibility Bug introduced 2017-08-16 14:47 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`stream_tell()` instead of `stream_seek()`). Are you sure this is correct? If so, you might want to change this to `$this->stream_tell()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
82		}
83		return $result;
84		}
85
86		public function stream_eof() {
87		return $this->bufferSize <= 0 && parent::stream_eof();
88		}
89
90		public function stream_tell() {
91		return $this->pos;
92		}
93
94		public function stream_write($data) {
95		return false;
		0 ignored issues – show Bug Best Practice introduced 2017-08-16 14:47 UTC by Report Bug Copy Issue Report The return type of `return false;` (`false`) is incompatible with the return type declared by the interface `Icewind\Streams\File::stream_write` of type `integer`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
96		}
97
98		public function stream_truncate($size) {
99		return false;
100		}
101		}
102

icewind1991 / SMB

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NativeReadStream::stream_read() A

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