Extensión:PDF Handler

This extension comes with MediaWiki 1.21 and above. Thus you do not have to download it again. However, you still need to follow the other instructions provided.

Manual de extensiones de MediaWiki

PdfHandler Estado de lanzamiento: estable
Implementación	Multimedia
Descripción	Allows to handle PDF files like multipage DJVU
Autor(es)	Martin Seidel (xarax)
Política de compatibilidad	Lanzamientos de screenshots junto con MediaWiki. Master no es compatible con versiones anteriores.
MediaWiki	>= 1.43
Cambios de la base de datos	No
Licencia	GNU Licencia Pública general 2.0 o posterior
Descarga	Descargar la extensión. Git [?]: Descargar desde master de Git Explorar el repositorio (Phabricator · GitHub) historial de cambios Colaboradores de repositorio (GitHub) revisión de código
Ejemplo	commons.wikimedia.org sandbox.semantic-mediawiki.org
Parámetros $wgPdfHandlerJpegQuality $wgPdfOutputExtension $wgPdfInfo $wgPdfProcessor $wgPdftoText $wgPdfPostProcessor $wgPdfHandlerDpi
Descargas trimestrales	217 (Ranked 29th)
Wikis públicos que lo utilizan	3,575 (Ranked 185th)
Traduce la extensión PdfHandler si está disponible en translatewiki.net
Función de vagabundo	pdfhandler
Asuntos	Tareas abiertas · Reportar un bug

The PdfHandler extension shows uploaded PDF files in a multipage preview layout.

Together with the Proofread Page extension, PDF files can be displayed side-by-side with text. This allows users to transcribe books and other documents.

Uso

• A user can display PDF files as an image, showing a single page at a time, like so: [[File:myPdfFile.pdf|page=1|600px]]. The page and size parameters are optional; the default page is page #1. Instead of a size-parameter, you can also use the thumb-parameter, with or without captions: [[File:myPdfFile.pdf|page=1|thumb|My PDF]].
• Because PdfHandler extends ImageHandler, you can use all the arguments that you would for an Image -- for example: thumb, right/left, caption, border, link, etc.

If you would like to present a 2-page pdf, for example, do the following: [[File:myPdfFile.pdf|page=1]] [[File:myPdfFile.pdf|page=2]]

• The main usage of the PdfHandler extension is without user interaction. If you upload a new pdf file, the metadata will be stored in the database, and then this file can be shown in a multipage preview layout like the djvu handler does. Without this extension, pdfs will not display properly when uploaded.
• Additionally, this extension allows Extension:ProofreadPage to handle pdfs in side-by-side view for transcribing/proofreading, as is done on Wikisource

Pre-requisitos

This extension requires the following packages to be installed first:

Package	Description	Link
ghostscript	Renders the page images. It provides the command gs.	www.ghostscript.com
imagemagick	Does dynamic resizing and thumbnailing of images. It provides the command convert.	www.imagemagick.org
xpdf-utils or poppler-utils	Extracts metadata from PDF files. If you see "0 × 0 pixel" on the file description of a PDF, you lack this package. It provides the command pdfinfo.	www.xpdfreader.com On Ubuntu and Debian, the "poppler-utils" package can be used instead of "xpdf-utils".

Type the following in your shell to see if you have the above installed first (it should list 4 rows):

which gs convert pdfinfo pdftotext

Si falta algo, instala los paquetes relacionados. Ejemplo en Debian y Ubuntu:

sudo apt install ghostscript imagemagick xpdf-utils

Si no puede instalar estos paquetes, póngase en contacto con su administrador de servidor para obtener ayuda en su entorno.

Instalación

• Make sure that the required software is installed before you continue!
• Descarga y extrae los archivos en un directorio denominado «PdfHandler» dentro de la carpeta extensions/.
  Developers and code contributors should install the extension from Git instead, using:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/PdfHandler
• Añade el siguiente código en la parte final de tu archivo LocalSettings.php :

  wfLoadExtension( 'PdfHandler' );
  

• Configure as required. (see also the examples provided)
•  Hecho – Navega a Special:Version en el wiki para verificar que la extensión se haya instalado correctamente.

Configuración

You can (or, depending on the operating system of the server, will have to) set some variables in the "LocalSettings.php" file:

$wgPdfProcessor (default = "gs")

path to your ghostscript implementation

$wgPdfPostProcessor (default = "convert")

path to your imagemagick convert

$wgPdfInfo (default = "pdfinfo")

path to your pdfinfo

$wgPdftoText (default = "pdftotext")

path to your pdftotext

$wgPdfOutputExtension (default = "jpg")

preferred output format

$wgPdfHandlerDpi (default = "150" )

resolution in dpi

The extension extracts a bitmap image for each page of the PDF, using this resolution (dpi = dots per inch). For example, a PDF page with the European size A4 is 210 mm wide, corresponding to 595 points (at 72 dpi). This yields an image 1240 pixels wide (at 150 dpi). If instead this parameter is set to 300 dpi, the width will be 2480 pixels.

$wgPdfHandlerJpegQuality (default = "95" / since MW 1.24+ )

Quality level, which the post processor should use.

Variables below are not specific to this extension

• Enable PDF uploads, if you haven't already: $wgFileExtensions [] = 'pdf';
• Enable ImageMagick, if you haven't already: $wgUseImageMagick = true;
• $wgMaxShellMemory - memory limit for gs, convert and pdfinfo. The default value might be too low.

Ubuntu

 Nota: This is identical to the default settings for this extension.

$wgPdfProcessor = 'gs';
$wgPdfPostProcessor = $wgImageMagickConvertCommand; // if defined via ImageMagick
// $wgPdfPostProcessor = 'convert'; // if not defined via ImageMagick
$wgPdfInfo = 'pdfinfo';
$wgPdftoText = 'pdftotext';

Debian

$wgPdfProcessor = '/usr/bin/gs';
$wgPdfPostProcessor = $wgImageMagickConvertCommand; // if defined via ImageMagick
// $wgPdfPostProcessor = '/usr/bin/convert';  // if not defined via ImageMagick
$wgPdfInfo = '/usr/bin/pdfinfo';
$wgPdftoText = '/usr/bin/pdftotext';

Windows

$wgPdfProcessor = 'C:\Program Files\gs\gs8.60\bin\gswin32.exe';
$wgPdfPostProcessor = $wgImageMagickConvertCommand; // if defined via ImageMagick
// $wgPdfPostProcessor = 'C:\Program Files\ImageMagick-6.6.2-Q16\convert.exe'; // if not defined via ImageMagick
$wgPdfInfo = 'C:\Program Files\xpdf-3.02pl1-win32\pdfinfo.exe';
$wgPdftoText = 'C:\Program Files\xpdf-3.02pl1-win32\pdftotext.exe';

macOS

$wgPdfProcessor = '/usr/local/bin/gs';
$wgPdfPostProcessor = $wgImageMagickConvertCommand; // if defined via ImageMagick
// $wgPdfPostProcessor = '/usr/local/bin/convert'; // if not defined via ImageMagick
$wgPdfInfo = '/usr/local/bin/pdfinfo';
$wgPdftoText = '/usr/local/bin/pdftotext';

Solución de problemas

General issues

• If PDF files do not display after upload, make sure that MediaWiki can execute the pdfinfo command and that configuration parameter $wgPdfInfo is set properly. Also check your error log, and make sure that your host hasn't disabled running external commands.
• If PDF files do not show properly after installation (for example saying 0 height and width) you may need to use the maintenance scripts "refreshImageMetadata.php -f" and "rebuildImages.php"

  Example:

  php refreshImageMetadata.php --mime application/pdf --force

  Also try to purge the page of the file. See Manual:Purge.

• If PDF files are rendered randomly check if the "C.UTF-8" locale is available on your server by running locale -a and make sure that configuration parameter $wgShellLocale is set to this locale.
• If the main preview image of PDF files is broken (image not found by browser), but all other images are working, also check your configuration parameter $wgShellLocale . If it is set to a locale that does not use the point. as a decimal separator (e.g. "de-de", which use a comma), the srcset for the img tags will be broken. MediaWiki strongly recommends to use the "C.UTF-8" locale.

Special solutions for Windows Server running MW 1.31.x

If you are running this extension on a windows machine with PHP 7, please see Tommeyheyser's workaround description.

If you are having pdfoinfo and/or pdftotext hanging issue that prevents a big PDF upload, please check the modified extension by SeongMoon

Véase también

• http://wiki.4intra.net/PdfHandler — a fork with much faster thumbnail generation by using pdftocairo instead of ghostscript+imagemagick
• Extension:Proofread Page — may be used in conjunction with PdfHandler
• How to use DjVu with MediaWiki
• Extension PDFEmbed