thumb.php File Reference

PHP script to stream out an image thumbnail. More...

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Functions
	wfExtractThumbParams ( $file, $params)
	Convert a thumbnail name (122px-foo.png) to parameters, using file handler.
	wfExtractThumbRequestInfo ( $thumbRel)
	Convert pathinfo type parameter, into normal request parameters.
	wfGenerateThumbnail (File $file, array $params, $thumbName, $thumbPath)
	Actually try to generate a new thumbnail.
	wfProxyThumbnailRequest ( $img, $thumbName)
	Proxies thumbnail request to a service that handles thumbnailing.
	wfStreamThumb (array $params)
	Stream a thumbnail specified by parameters.
	wfThumbError ( $status, $msgHtml, $msgText=null, $context=[])
	Output a thumbnail generation error message.
	wfThumbErrorText ( $status, $msgText)
	Output a thumbnail generation error message.
	wfThumbHandle404 ()
	Handle a thumbnail request via thumbnail file URL.

Variables
	$mediawiki = new MediaWiki()
	$wgTrivialMimeDetection = true
if(defined( 'THUMB_HANDLER'))	else
const	MW_NO_OUTPUT_COMPRESSION 1

Detailed Description

PHP script to stream out an image thumbnail.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. http://www.gnu.org/copyleft/gpl.html

Definition in file thumb.php.

Function Documentation

wfExtractThumbParams()

wfExtractThumbParams	(		$file,
			$params )

Convert a thumbnail name (122px-foo.png) to parameters, using file handler.

Parameters

File	$file	File object for file in question
array	$params	Array of parameters so far

Returns

array Parameters array with more parameters

Definition at line 571 of file thumb.php.

References $handler, $matches, $params, and list.

Referenced by wfStreamThumb().

wfExtractThumbRequestInfo()

wfExtractThumbRequestInfo

(

$thumbRel

)

Convert pathinfo type parameter, into normal request parameters.

So for example, if the request was redirected from /w/images/thumb/a/ab/Foo.png/120px-Foo.png. The $thumbRel parameter of this function would be set to "a/ab/Foo.png/120px-Foo.png". This method is responsible for turning that into an array with the folowing keys:

• f => the filename (Foo.png)
• rel404 => the whole thing (a/ab/Foo.png/120px-Foo.png)
• archived => 1 (If the request is for an archived thumb)
• temp => 1 (If the file is in the "temporary" zone)
• thumbName => the thumbnail name, including parameters (120px-Foo.png)

Transform specific parameters are set later via wfExtractThumbParams().

Parameters

string

$thumbRel

Thumbnail path relative to the thumb zone

Returns

array|null Associative params array or null

Definition at line 532 of file thumb.php.

References $params, list, and RepoGroup\singleton().

Referenced by wfThumbHandle404().

wfGenerateThumbnail()

wfGenerateThumbnail	(	File	$file,
		array	$params,
			$thumbName,
			$thumbPath )

Actually try to generate a new thumbnail.

Parameters

File	$file
array	$params
string	$thumbName
string	$thumbPath

Returns

array (MediaTransformOutput|bool, string|bool error message HTML)

Definition at line 435 of file thumb.php.

References $cache, $e, $params, $result, $wgAttemptFailureEpoch, PoolCounterWork\execute(), function, File\RENDER_NOW, and wfMessage().

Referenced by wfStreamThumb().

wfProxyThumbnailRequest()

wfProxyThumbnailRequest	(		$img,
			$thumbName )

Proxies thumbnail request to a service that handles thumbnailing.

Parameters

File	$img
string	$thumbName

Definition at line 395 of file thumb.php.

References $req, and $value.

Referenced by wfStreamThumb().

wfStreamThumb()

wfStreamThumb

(

array

$params

)

Stream a thumbnail specified by parameters.

Parameters

array

$params

List of thumbnailing parameters. In addition to parameters passed to the MediaHandler, this may also includes the keys: f (for filename), archived (if archived file), temp (if temp file), w (alias for width), p (alias for page), r (ignored; historical), rel404 (path for render on 404 to verify hash path correct), thumbName (thumbnail name to potentially extract more parameters from e.g. 'lossy-page1-120px-Foo.tiff' would add page, lossy and width to the parameters)

Returns

void

Definition at line 92 of file thumb.php.

References $e, $params, $response, $starttime, $wgVaryOnXFP, File\DELETED_FILE, files, User\getGroupPermissions(), MessageSpecifier\getKey(), HttpStatus\header(), list, NS_FILE, PROTO_CURRENT, RepoGroup\singleton(), File\THUMB_FULL_NAME, wfExpandUrl(), wfExtractThumbParams(), wfGenerateThumbnail(), wfLocalFile(), wfMessage(), wfProxyThumbnailRequest(), wfThumbError(), wfThumbErrorText(), wfThumbIsStandard(), and wfTimestamp().

Referenced by wfThumbHandle404().

wfThumbError()

wfThumbError	(		$status,
			$msgHtml,
			$msgText = null,
			$context = [] )

Output a thumbnail generation error message.

Parameters

int	$status
string	$msgHtml	HTML
string | null	$msgText	Short error description, for internal logging. Defaults to $msgHtml. Only used for HTTP 500 errors.
array	$context	Error context, for internal logging. Only used for HTTP 500 errors.

Returns

void

Definition at line 634 of file thumb.php.

References $content, $context, $debug, $wgShowHostnames, HttpStatus\header(), and wfHostname().

Referenced by wfStreamThumb(), wfThumbErrorText(), and wfThumbHandle404().

wfThumbErrorText()

wfThumbErrorText	(		$status,
			$msgText )

Output a thumbnail generation error message.

Parameters

int	$status
string	$msgText	Plain text (will be html escaped)

Returns

void

Definition at line 620 of file thumb.php.

References wfThumbError().

Referenced by wfStreamThumb().

wfThumbHandle404()

wfThumbHandle404

(

)

Handle a thumbnail request via thumbnail file URL.

Returns

void

Definition at line 51 of file thumb.php.

References $matches, $params, $wgArticlePath, RepoGroup\singleton(), wfExtractThumbRequestInfo(), wfStreamThumb(), and wfThumbError().

Variable Documentation

$mediawiki

$mediawiki = new MediaWiki()

Definition at line 41 of file thumb.php.

$wgTrivialMimeDetection

$wgTrivialMimeDetection = true

Definition at line 31 of file thumb.php.

else

if (defined('THUMB_HANDLER')) else

Initial value:

{
    
    wfStreamThumb( $wgRequest->getQueryValues() )

Definition at line 36 of file thumb.php.

MW_NO_OUTPUT_COMPRESSION

const MW_NO_OUTPUT_COMPRESSION 1

Definition at line 27 of file thumb.php.