Расширение:PageImages
 Статус релиза: стабильно |
|
|---|---|
| Реализация | API, Расширение парсера |
| Описание | Собирает информацию об изображениях, используемых на странице |
| Автор(ы) | Max Semenik (MaxSemобсуждение) |
| Последняя версия | continuous updates |
| Политика совместимости | Снэпшоты выходят вместе с MediaWiki. Мастер не имеет обратной совместимости. |
| MediaWiki | 1.37+ |
| PHP | 7.3.19+ |
| Изменения в БД | Нет |
| Лицензия | WTFPL 2.0 |
| Скачать | |
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| Ежеквартальные загрузки | 123 (Ranked 47th) |
| Использование общедоступными вики | 2,271 (Ranked 191st) |
| Переведите расширение PageImages, если оно доступно на translatewiki.net | |
| Проблемы | Открытые задачи · Сообщить об ошибке |
PageImages расширение собирает информацию об изображениях, используемых на странице.
Его цель - вернуть единственный наиболее подходящий эскиз, связанный со статьей.
PageImages also provides OpenGraph protocol metadata for articles on the wiki for 3rd parties like Facebook to extract.
Установка
- Скачайте и распакуйте файл(ы) в папку с названием
PageImagesв вашей папкеextensions/.
Вместо этого разработчикам и соавторам кода следует установить расширение из Git, используя:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/PageImages - Добавьте следующий код в конце вашего файла LocalSettings.php:
wfLoadExtension( 'PageImages' );
- Configure as required
- To initially assign the page images to the pages, run the "initImageData.php" script from the extensions maintenance directory (
/path/to/extensions/PageImages/maintenance/) 
Готово – Перейдите на страницу Special:Version на своей вики, чтобы удостовериться в том, что расширение успешно установлено.
Настройка
$wgPageImagesDenylist is an array of sources for image denylists. Listed images will never be selected as page images. Examples:
$wgPageImagesDenylist = [
// Page on local wiki
[
'type' => 'db',
'page' => 'MediaWiki:Pageimages-denylist',
'db' => false,
],
// Page on Wikimedia Commons, for other Wikimedia projects using direct DB access
[
'type' => 'db',
'page' => 'MediaWiki:Pageimages-denylist',
'db' => 'commonswiki',
],
// Page on Commons, for third-party sites using web access
[
'type' => 'url',
'url' => 'http://commons.wikimedia.org/w/index.php?title=somepage&action=raw',
],
];
More than one source can be used at the same time.
The denylist should contain wikilinks to files. The rest of the content is irrelevant (and can contain links to other pages). Например:
* [[:File:First denylisted file.png]]
* [[:File:Second denylisted file.jpeg]]
...
Remember that file links that result in images being added to the page will not work (these files are denylisted for a reason, right?), so don't forget the : in front of the links.
$wgPageImagesDenylistExpiry determines how long the list will remain cached, in seconds. По умолчанию: 15 * 60 (15 минут).
$wgPageImagesExpandOpenSearchXml if set to true, PageImages will override the image detection in the opensearch API module with its own, more accurate results.
По умолчанию: false.
$wgPageImagesNamespaces is an array of namespaces PageImages will be activated on. По умолчанию: NS_MAIN.
After the change, you'll have to run refreshLinks.php to generate the Page image information for those namespaces (hopefully, you can use the --namespace parameter to process only pages on the affected namespaces, since that script is very resource-intensive)
$wgPageImagesOpenGraph enables or disables the OpenGraph meta tags (could be useful if other extensions manage these tags) (1.39+).
Default: true
$wgPageImagesOpenGraphFallbackImage is a URL to a fallback image that will be shown when there is no image on a page.
Default:
false
Upgrade to MediaWiki 1.37+ notes
- Since MediaWiki 1.37,
$wgPageImagesBlacklistand$wgPageImagesBlacklistExpiryhave been renamed to$wgPageImagesDenylistand$wgPageImagesDenylistExpiryrespectively. There's no backward compatibility code added to accept the old variable names, which means you should change the variable names during the upgrade or define both variables in advance in preparation for the upgrade. - Since MediaWiki 1.37, the default page value for
$wgPageImagesDenylisthas been changed fromMediaWiki:Pageimages-blacklisttoMediaWiki:Pageimages-denylist. If you've added content toMediaWiki:Pageimages-blackliston your wiki, you should rename it during the upgrade. If you want to prepare in advance for the upgrade, you can rename the page to the new name and also set$wgPageImagesBlacklist(the old variable name) to the new page name. The default value will be used when upgrading, which should match your previous change.
API
The PageImages extension provides image information by adding a prop=pageimages to the properties API for action=query.
prop=pageimages (pi)
- This module requires read rights.
- Source: PageImages
- License: WTFPL
Returns information about images on the page, such as thumbnail and presence of photos.
- piprop
Which information to return:
- thumbnail
- URL and dimensions of thumbnail image associated with page, if any.
- name
- Image title.
- original
- URL and original dimensions of image associated with page, if any.
- Values (separate with | or alternative): name, original, thumbnail
- Default: thumbnail|name
- pithumbsize
Maximum width in pixels of thumbnail images.
- Type: integer
- Default: 50
- pilimit
Properties of how many pages to return.
- Type: integer or max
- The value must be between 1 and 50.
- Default: 50
- pilicense
Limit page images to a certain license type:
- free
- Only free images.
- any
- Best image, whether free or non-free.
- One of the following values: any, free
- Default: free
- picontinue
When more results are available, use this to continue. More detailed information on how to continue queries can be found on mediawiki.org.
- Type: integer
- pilangcode
Code for the language the image is going to be rendered in if multiple languages are supported
- Get name and 100-pixel thumbnail of an image on the Albert Einstein page.
- api.php?action=query&prop=pageimages&titles=Albert%20Einstein&pithumbsize=100 [open in sandbox]
Response
{
// piprop.name (and image exists)
pageimage?: string // Source image filename (basename of original.source).
// piprop.thumbnail (and image exists)
thumbnail?: {
source: string // Thumbnail image URL.
width: number // Thumbnail image width in pixels.
height: number // Thumbnail image height in pixels.
}
// piprop.original (and image exists)
original?: {
source: string // Source image URL.
width: number // Source image width in pixels.
height: number // Source image height in pixels.
}
}
Пример запроса
| Результат |
|---|
{
"query": {
"normalized": [
{
"from": "Lightbox_demo",
"to": "Lightbox demo"
}
],
"pages": {
"162510": {
"pageid": 162510,
"ns": 0,
"title": "Lightbox demo",
"thumbnail": {
"source": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Crystal_Clear_app_korganizer.png/50px-Crystal_Clear_app_korganizer.png",
"width": 50,
"height": 50
},
"pageimage": "Crystal_Clear_app_korganizer.png"
}
}
}
}
|
Как это работает
When a page is saved with a local image, the parser runs the hooks ParserMakeImageParams and LinksUpdate.
The PageImages extension responds to these (and other hooks) and inserts a new property for the page into the page_props table.
The property name is page_image_free and its value is the name of the image.
The extension only stores the chosen image name. Other features may display the image, such as Page information, Hovercards, and Mobile search while typing.
Выбор изображения
How can I check which image is associated with a page?
Page images will be listed on the ?action=info page.
How does it select images?
All images on the page are collected, and a score for each image is calculated. The image with the highest score is selected as the page image. If the wiki is configured such that images contain metadata that specifies images are not freely licensed, the image with the best score that is also freely licensed is also stored. If no suitable image is found or all the images score badly (i.e., have a negative score), the page will not have any images.
If $wgPageImagesLeadSectionOnly is true, only images in the lead section will be considered. This is true for Wikipedia projects only; all other projects can pull images from outside the lead.
How are images scored?
The best possible page image on Wikimedia wikis is one of the first four images in an article, with a width/height between 400-600px and a height/width twice the value of the other dimension.
- The algorithm is configurable.
- Scores are calculated by a combination of:
- Image widths as defined in
$wgPageImagesScores['width']- In Wikimedia wikis, images smaller than 119 pixels are negatively weighted. Images with widths between 400px-600px are favoured, with a preference for the lower bound.
- Images inside galleries are scored separately using
$wgPageImagesScores['galleryImageWidth']- In the Wikimedia wikis gallery, images smaller than 100 pixels are disregarded.
- Position in document is also considered as defined in
$wgPageImagesScores['position']- On Wikimedia wikis, only the first four images that appear in the document are considered.
- The ratio of the image's width to height is considered
$wgPageImagesScores['ratio']- On Wikimedia wikis a ratio of 0.4 to 3.1 is allowed, with 0.6 to 2.1 preferred.
- The default value is
$wgPageImagesScores['ratio'] = ["3" => -100, "5" => 0, "20" => 5, "30"=> 0, "31"=> -100];with the key representing the width divided by height, rounded to the tenths place, and the decimal shifted one position to the right. An image 400px wide by 300px high would have a value of 13. The key's value is the scoring multiple associated with that ratio. Keys are selected and increase from zero, with a new scoring multiple not taking effect until the key has met or exceeded its value but not exceeded the next key. Any other images will score negatively and be discarded.
- Image widths as defined in
How are page images updated?
Pageimages populates images whenever the LinksUpdate hook runs, e.g. when a page is being edited.
Can I exclude certain page images?
Yes!
For an entire wiki, there is a page that administrators can edit at MediaWiki:Pageimages-denylist (example). Any images that appear here will not be used as page images for any article.
For specific pages, add |class=notpageimage to each image you want to exclude. For example, [[File:Example.png|class=notpageimage]].
More details are at phab:T301588.
How can I see the image of a page?
Using the Сведения о странице link in the sidebar (or adding ?action=info to the URL) you'll be able to see the current image choice.
How can I purge a bad image?
The page image only changes when a link in an article changes. Please add/remove links from the page for emergencies, reverting if necessary. Purging will not work. For larger emergencies please file a Phabricator ticket.
Why is my page image a blank box?
This likely relates to video content in your article. If a video file begins with a blank screen, that will become the default thumbnail for the video, and if used as the page image, it will become the page image. We are currently working on a fix for this that will allow you to change the default thumbnail of a video. See: phab:T92457 and phab:T22647 for further information.
См. также
| Это расширение используется в одном или нескольких проектах Викимедиа. Вероятно, это означает, что расширение стабильно и работает достаточно хорошо, чтобы использоваться такими сайтами с высоким трафиком. Найдите название этого расширения в файлах конфигурации Викимедиа CommonSettings.php и InitialiseSettings.php, чтобы узнать, где оно установлено. Полный список расширений, установленных на конкретной вики, можно увидеть на странице Special:Version wiki. |
| Это расширение включено в следующие вики-фермы/хостинги и/или пакеты: Это не исчерпывающий список. Некоторые вики-фермы/хостинги и/или пакеты могут содержать это расширение, даже если они не перечислены здесь. Всегда сверяйтесь со своими вики-фермами/хостингами или комплектами/бандлами для подтверждения. |