Improve path resolution, add additional tests, clean-up tests (use data-providers).
This commit is contained in:
barryhughes
parent
a41ae705dd
commit
b46f28f4e2
|
|
@ -144,7 +144,7 @@ class URL {
|
|||
// Clean the path.
|
||||
foreach ( $segments as $part ) {
|
||||
// Drop empty segments.
|
||||
if ( strlen( $part ) === 0 ) {
|
||||
if ( strlen( $part ) === 0 || '.' === $part ) {
|
||||
continue;
|
||||
}
|
||||
|
||||
|
|
@ -185,6 +185,12 @@ class URL {
|
|||
$this->path_parts[] = $part;
|
||||
}
|
||||
|
||||
// Protect against empty relative paths.
|
||||
if ( count( $this->path_parts ) === 0 && ! $this->is_absolute ) {
|
||||
$this->path_parts = array( '.' );
|
||||
$this->is_non_root_directory = true;
|
||||
}
|
||||
|
||||
// Reform the path from the processed segments, appending a leading slash if it is absolute and restoring
|
||||
// the Windows drive letter if we have one.
|
||||
$this->components['path'] = ( $this->is_absolute ? '/' : '' ) . implode( '/', $this->path_parts ) . ( $this->is_non_root_directory ? '/' : '' );
|
||||
|
|
@ -263,9 +269,16 @@ class URL {
|
|||
return false;
|
||||
}
|
||||
|
||||
if ( $parts_count > 0 && '..' === $this->path_parts[0] ) {
|
||||
// In the case where we have a filepath already starting with one or more traversals, we need to add additional traversals.
|
||||
$last_traversal = max( array_keys( $this->path_parts, '..', true ) ) + ( $this->is_non_root_directory ? 1 : 0 );
|
||||
// Handle cases where the path starts with one or more 'dot segments'. Since the path has already been
|
||||
// processed, we can be confident that any such segments are at the start of the path.
|
||||
if ( $parts_count > 0 && ( '.' === $this->path_parts[0] || '..' === $this->path_parts[0] ) ) {
|
||||
// Determine the index of the last dot segment (ex: given the path '/../../foo' it would be 1).
|
||||
$single_dots = array_keys( $this->path_parts, '.', true );
|
||||
$double_dots = array_keys( $this->path_parts, '..', true );
|
||||
$max_dot_index = max( array_merge( $single_dots, $double_dots ) );
|
||||
|
||||
// Prepend the required number of traversals and discard unnessary trailing segments.
|
||||
$last_traversal = $max_dot_index + ( $this->is_non_root_directory ? 1 : 0 );
|
||||
$parent_path = str_repeat( '../', $level ) . join( '/', array_slice( $this->path_parts, 0, $last_traversal ) );
|
||||
} elseif ( $parent_path_parts_to_keep < 0 ) {
|
||||
// For relative filepaths only, we use traversals to describe the requested parent.
|
||||
|
|
|
|||
|
|
@ -26,240 +26,174 @@ class URLTest extends WC_Unit_Test_Case {
|
|||
);
|
||||
}
|
||||
|
||||
public function test_directory_traversal_resolution() {
|
||||
$this->assertEquals(
|
||||
'/var/foo/foobar',
|
||||
( new URL( '/var/foo/bar/baz/../../foobar' ) )->get_path(),
|
||||
'Correctly resolves a path containing a directory traversal.'
|
||||
);
|
||||
/**
|
||||
* @dataProvider path_expectations
|
||||
*
|
||||
* @param string $source_path
|
||||
* @param string $expected_resolution
|
||||
*/
|
||||
public function test_path_resolution( $source_path, $expected_resolution ) {
|
||||
$this->assertEquals( $expected_resolution, ( new URL( $source_path ) )->get_path() );
|
||||
}
|
||||
|
||||
$this->assertEquals(
|
||||
'/bazbar',
|
||||
( new URL( '/var/foo/../../../../bazbar' ) )->get_path(),
|
||||
'Correctly resolves a path containing a directory traversal, even if the traversals attempt to backtrack beyond the root directory.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'../should/remain/relative',
|
||||
( new URL( 'relative/../../should/remain/relative' ) )->get_path(),
|
||||
'Simplifies a relative path containing directory traversals to the extent possible (without inspecting the filesystem - scenario #1).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'../../should/remain/relative',
|
||||
( new URL( 'relative/../../../should/remain/relative' ) )->get_path(),
|
||||
'Simplifies a relative path containing directory traversals to the extent possible (without inspecting the filesystem - scenario #2).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file:///foo/bar/baz',
|
||||
( new URL( '/../foo/bar/baz/bazooka/../../baz' ) )->get_url(),
|
||||
'Directory traversals are appropriately resolved even in complex cases with multiple separate traversals. When the original path is absolute, the output will be absolute.'
|
||||
/**
|
||||
* Expectations when requesting the path of a URL.
|
||||
*
|
||||
* @return string[][]
|
||||
*/
|
||||
public function path_expectations(): array {
|
||||
return array(
|
||||
array( '/var/foo/bar/baz/../../foobar', '/var/foo/foobar' ),
|
||||
array( '/var/foo/../../../../bazbar', '/bazbar' ),
|
||||
array( '././././.', './' ),
|
||||
array( 'empty/segments//are/stripped', 'empty/segments/are/stripped' ),
|
||||
array( '///nonempty/ /whitespace/ /is//kept', '/nonempty/ /whitespace/ /is/kept' ),
|
||||
array( 'relative/../../should/remain/relative', '../should/remain/relative' ),
|
||||
array( 'relative/../../../should/remain/relative', '../../should/remain/relative' ),
|
||||
array( 'c:\\Windows\Server\HTTP\dump.xml', 'c:/Windows/Server/HTTP/dump.xml')
|
||||
);
|
||||
}
|
||||
|
||||
public function test_can_get_normalized_string_representation() {
|
||||
$this->assertEquals(
|
||||
'foo/bar/baz',
|
||||
( new URL( 'foo/bar//baz' ) )->get_path(),
|
||||
'Empty segments are discarded, remains as a relative path.'
|
||||
);
|
||||
/**
|
||||
* @dataProvider url_expectations
|
||||
*
|
||||
* @param string $source_url
|
||||
* @param string $expected_resolution
|
||||
*/
|
||||
public function test_url_resolution( $source_url, $expected_resolution ) {
|
||||
$this->assertEquals( $expected_resolution, ( new URL( $source_url ) )->get_url() );
|
||||
}
|
||||
|
||||
$this->assertEquals(
|
||||
'/foo/ /bar/ /baz/foobarbaz',
|
||||
( new URL( '///foo/ /bar/ /baz//foobarbaz' ) )->get_path(),
|
||||
'Empty segments are discarded, non-empty segments containing only whitespace are preserved, remains as an absolute path.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'c:/Windows/Server/HTTP/dump.xml',
|
||||
( new URL( 'c:\\Windows\Server\HTTP\dump.xml' ) )->get_path(),
|
||||
'String representations of Windows filepaths have forward slash separators and preserve the drive letter.'
|
||||
/**
|
||||
* Expectations when resolving URLs.
|
||||
*
|
||||
* @return string[][]
|
||||
*/
|
||||
public function url_expectations(): array {
|
||||
return array(
|
||||
array( '/../foo/bar/baz/bazooka/../../baz', 'file:///foo/bar/baz' ),
|
||||
array( './a/b/c/./../././../b/c', 'file://a/b/c' ),
|
||||
array( 'relative/path', 'file://relative/path' ),
|
||||
array( '/absolute/path', 'file:///absolute/path' ),
|
||||
array( '/var/www/network/%2econfig', 'file:///var/www/network/%2econfig' ),
|
||||
array( '///foo', 'file:///foo' ),
|
||||
array( '~/foo.txt', 'file://~/foo.txt' ),
|
||||
array( 'baz///foo', 'file://baz/foo' ),
|
||||
array( 'file:///etc/foo/bar', 'file:///etc/foo/bar' ),
|
||||
array( 'foo://bar', 'foo://bar/' ),
|
||||
array( 'foo://bar/baz-file', 'foo://bar/baz-file' ),
|
||||
array( 'foo://bar/baz-dir/', 'foo://bar/baz-dir/' ),
|
||||
array( 'https://foo.bar/parent/.%2e/asset.txt', 'https://foo.bar/asset.txt' ),
|
||||
array( 'https://foo.bar/parent/%2E./asset.txt', 'https://foo.bar/asset.txt' ),
|
||||
array( 'https://foo.bar/parent/%2E%2e/asset.txt', 'https://foo.bar/asset.txt' ),
|
||||
array( 'https://foo.bar/parent/%2E.%2fasset.txt', 'https://foo.bar/parent/%2E.%2fasset.txt' ),
|
||||
array( 'http://localhost?../../bar', 'http://localhost/?../../bar' ),
|
||||
);
|
||||
}
|
||||
|
||||
public function test_can_get_normalized_url_representation() {
|
||||
$this->assertEquals(
|
||||
'file://relative/path',
|
||||
( new URL( 'relative/path' ) )->get_url(),
|
||||
'Can obtain a URL representation of a relative filepath, even when the initial string was a plain filepath.'
|
||||
);
|
||||
/**
|
||||
* @dataProvider parent_url_expectations
|
||||
*
|
||||
* @param string $source_path
|
||||
* @param int $parent_level
|
||||
* @param string|false $expectation
|
||||
*/
|
||||
public function test_can_obtain_parent_url( string $source_path, int $parent_level, $expectation ) {
|
||||
$this->assertEquals( $expectation, ( new URL( $source_path ) )->get_parent_url( $parent_level ) );
|
||||
}
|
||||
|
||||
$this->assertEquals(
|
||||
'file:///absolute/path',
|
||||
( new URL( '/absolute/path' ) )->get_url(),
|
||||
'Can obtain a URL representation of an absolute filepath, even when the initial string was a plain filepath.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file:///etc/foo/bar',
|
||||
( new URL( 'file:///etc/foo/bar' ) )->get_url(),
|
||||
'Can obtain a URL representation of a filepath, when the source filepath was also expressed as a URL.'
|
||||
/**
|
||||
* Expectations when resolving (grand-)parent URLs.
|
||||
*
|
||||
* @return array[]
|
||||
*/
|
||||
public function parent_url_expectations(): array {
|
||||
return array(
|
||||
array( '/', 1, false ),
|
||||
array( '/', 2, false ),
|
||||
array( './', 1, 'file://../' ),
|
||||
array( '../', 1, 'file://../../' ),
|
||||
array( 'relative-file.png', 1, 'file://./' ),
|
||||
array( 'relative-file.png', 2, 'file://../' ),
|
||||
array( '/var/dev/', 1, 'file:///var/' ),
|
||||
array( '/var/../dev/./../foo/bar', 1, 'file:///foo/' ),
|
||||
array( 'https://example.com', 1, false ),
|
||||
array( 'https://example.com/foo', 1, 'https://example.com/' ),
|
||||
array( 'https://example.com/foo/bar/baz/../cat/', 2, 'https://example.com/foo/' ),
|
||||
array( 'https://example.com/foo/bar/baz/%2E%2E/dog/', 2, 'https://example.com/foo/' ),
|
||||
array( 'file://./', 1, 'file://../' ),
|
||||
array( 'file://./', 2, 'file://../../' ),
|
||||
array( 'file://../../foo', 1, 'file://../../' ),
|
||||
array( 'file://../../foo', 2, 'file://../../../' ),
|
||||
array( 'file://../../', 1, 'file://../../../' ),
|
||||
array( 'file://./../', 2, 'file://../../../' ),
|
||||
);
|
||||
}
|
||||
|
||||
public function test_handling_of_percent_encoded_periods() {
|
||||
$this->assertEquals(
|
||||
'https://foo.bar/asset.txt',
|
||||
( new URL( 'https://foo.bar/parent/.%2e/asset.txt' ) )->get_url(),
|
||||
'Directory traversals expressed using percent-encoding are still resolved (lowercase, one encoded period).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'https://foo.bar/asset.txt',
|
||||
( new URL( 'https://foo.bar/parent/%2E./asset.txt' ) )->get_url(),
|
||||
'Directory traversals expressed using percent-encoding are still resolved (uppercase, one encoded period).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'https://foo.bar/asset.txt',
|
||||
( new URL( 'https://foo.bar/parent/%2E%2e/asset.txt' ) )->get_url(),
|
||||
'Directory traversals expressed using percent-encoding are still resolved (mixed case, both periods encoded).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'https://foo.bar/parent/%2E.%2fasset.txt',
|
||||
( new URL( 'https://foo.bar/parent/%2E.%2fasset.txt' ) )->get_url(),
|
||||
'If the forward slash after a double period is URL encoded, there is no directory traversal (since this means the slash is a part of the segment and is not a separator).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file:///var/www/network/%2econfig',
|
||||
( new URL( '/var/www/network/%2econfig' ) )->get_url(),
|
||||
'Use of percent-encoding in URLs is accepted and unnecessary conversion does not take place.'
|
||||
);
|
||||
/**
|
||||
* @dataProvider all_parent_url_expectations
|
||||
*
|
||||
* @param string $source_path
|
||||
* @param array $expectation
|
||||
*/
|
||||
public function test_can_obtain_all_parent_urls( string $source_path, array $expectation ) {
|
||||
$this->assertEquals( $expectation, ( new URL( $source_path ) )->get_all_parent_urls() );
|
||||
}
|
||||
|
||||
public function test_can_obtain_parent_url() {
|
||||
$this->assertFalse(
|
||||
( new URL( '/' ) )->get_parent_url(),
|
||||
'Root directory "/" is considered to have no parent (scenario #1).'
|
||||
);
|
||||
|
||||
$this->assertFalse(
|
||||
( new URL( '/' ) )->get_parent_url( 2 ),
|
||||
'Root directory "/" is considered to have no parent (scenario #2).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file:///var/',
|
||||
( new URL( '/var/dev/' ) )->get_parent_url(),
|
||||
'The parent URL will be trailingslashed.'
|
||||
);
|
||||
|
||||
$this->assertFalse(
|
||||
( new URL( 'https://example.com' ) )->get_parent_url(),
|
||||
'In the case of non-file URLs, if we only have a host name and no path then the parent cannot be derived.'
|
||||
);
|
||||
}
|
||||
|
||||
public function test_can_obtain_all_parent_urls() {
|
||||
$this->assertEquals(
|
||||
/**
|
||||
* Expectations when obtaining all possible parent URLs of a given URL/path.
|
||||
*
|
||||
* @return array[]
|
||||
*/
|
||||
public function all_parent_urL_expectations(): array {
|
||||
return array(
|
||||
array(
|
||||
'https://local.web/wp-content/uploads/woocommerce_uploads/pdf_bucket/',
|
||||
'https://local.web/wp-content/uploads/woocommerce_uploads/',
|
||||
'https://local.web/wp-content/uploads/',
|
||||
'https://local.web/wp-content/',
|
||||
'https://local.web/',
|
||||
'https://local.web/wp-content/uploads/woocommerce_uploads/pdf_bucket/secret-sauce.pdf',
|
||||
array(
|
||||
'https://local.web/wp-content/uploads/woocommerce_uploads/pdf_bucket/',
|
||||
'https://local.web/wp-content/uploads/woocommerce_uploads/',
|
||||
'https://local.web/wp-content/uploads/',
|
||||
'https://local.web/wp-content/',
|
||||
'https://local.web/',
|
||||
),
|
||||
),
|
||||
array(
|
||||
'/srv/websites/my.wp.site/public/test-file.doc',
|
||||
array(
|
||||
'file:///srv/websites/my.wp.site/public/',
|
||||
'file:///srv/websites/my.wp.site/',
|
||||
'file:///srv/websites/',
|
||||
'file:///srv/',
|
||||
'file:///',
|
||||
),
|
||||
),
|
||||
array(
|
||||
'C:\\Documents\\Web\\TestSite\\BackgroundTrack.mp3',
|
||||
array(
|
||||
'file://C:/Documents/Web/TestSite/',
|
||||
'file://C:/Documents/Web/',
|
||||
'file://C:/Documents/',
|
||||
'file://C:/',
|
||||
),
|
||||
),
|
||||
( new URL( 'https://local.web/wp-content/uploads/woocommerce_uploads/pdf_bucket/secret-sauce.pdf' ) )->get_all_parent_urls(),
|
||||
'All parent URLs can be derived, but the host name is never stripped.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
array(
|
||||
'file:///srv/websites/my.wp.site/public/',
|
||||
'file:///srv/websites/my.wp.site/',
|
||||
'file:///srv/websites/',
|
||||
'file:///srv/',
|
||||
'file:///',
|
||||
array(),
|
||||
),
|
||||
( new URL( '/srv/websites/my.wp.site/public/test-file.doc' ) )->get_all_parent_urls(),
|
||||
'All parent URLs can be derived for a filepath, up to and including the root directory.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
array(
|
||||
'file://C:/Documents/Web/TestSite/',
|
||||
'file://C:/Documents/Web/',
|
||||
'file://C:/Documents/',
|
||||
'file://C:/',
|
||||
'relative/to/abspath',
|
||||
array(
|
||||
'file://relative/to/',
|
||||
'file://relative/',
|
||||
'file://./',
|
||||
),
|
||||
),
|
||||
( new URL( 'C:\\Documents\\Web\\TestSite\\BackgroundTrack.mp3' ) )->get_all_parent_urls(),
|
||||
'All parent URLs can be derived for a filepath, up to and including the root directory plus drive letter (Windows).'
|
||||
);
|
||||
}
|
||||
|
||||
public function test_obtaining_parent_urls_from_relative_urls() {
|
||||
$this->assertEquals(
|
||||
array(
|
||||
'file://relative/to/',
|
||||
'file://relative/',
|
||||
'file://./',
|
||||
'../../some.file',
|
||||
array(
|
||||
'file://../../'
|
||||
),
|
||||
),
|
||||
( new URL( 'relative/to/abspath' ) )->get_all_parent_urls(),
|
||||
'When obtaining all parent URLs for a relative filepath, we never return the root directory and never return a URL containing traversals if there were none to begin with.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
array(
|
||||
'file://../../'
|
||||
),
|
||||
( new URL( '../../some.file' ) )->get_all_parent_urls(),
|
||||
'When obtaining all parent URLs for a path that begins with directory traversals, we only go up one more level.'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../../',
|
||||
( new URL( '../' ) )->get_parent_url(),
|
||||
'If a relative *directory* beginning with a traversal is provided, we can successfully derive its parent (scenario #1).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../../../',
|
||||
( new URL( '../' ) )->get_parent_url( 2 ),
|
||||
'If a relative *directory* beginning with a traversal is provided, we can successfully derive its parent (scenario #2).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../../../',
|
||||
( new URL( '../../some.file' ) )->get_parent_url( 2 ),
|
||||
'If the grandparent of a relative path that begins with one or more traversals is requested, we should receive the expected result (scenario #1).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../../../../',
|
||||
( new URL( '../../some.file' ) )->get_parent_url( 3 ),
|
||||
'If the grandparent of a relative path that begins with one or more traversals is requested, we should receive the expected result (scenario #2).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://./',
|
||||
( new URL( 'just-a-file.png' ) )->get_parent_url(),
|
||||
'The parent URL of an unqualified, relative file is simply an empty relative path (generally, though not always, this is equivalent to ABSPATH).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../../',
|
||||
( new URL( '../../relatively-placed-file.pdf' ) )->get_parent_url()
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../',
|
||||
( new URL( 'relatively-placed-file.pdf' ) )->get_parent_url( 2 ),
|
||||
'For filepaths, we can successfully determine the (grand-)parent directories of relative filepaths (when explicitly requested).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../../',
|
||||
( new URL( 'relatively-placed-file.pdf' ) )->get_parent_url( 3 ),
|
||||
'For filepaths, we can successfully determine the (grand-)parent directories of relative filepaths (when explicitly requested).'
|
||||
);
|
||||
|
||||
$this->assertEquals(
|
||||
'file://../foo/bar/baz',
|
||||
( new URL( '../foo/bar/cat/dog/../../baz' ) )->get_url(),
|
||||
'Directory traversals are appropriately resolved even in complex cases with multiple separate traversals.'
|
||||
);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue