98 lines
4.3 KiB
HTML
98 lines
4.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<link rel="shortcut icon" href="/favicon.ico">
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<link rel="stylesheet" href="../assets/css/blog.css">
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</head><title>Milestone: Port Media handling from v2 - GNU social V3</title>
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</head><body>
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<header>
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<div class="home-menu menu menu-horizontal menu-fixed">
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<a class="menu-heading" href="https://gnusocial.rocks/">
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<img src="../assets/img/gnu-social-logo-invert.svg" alt="GNU social">
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<b>gnu</b>social
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</a>
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<li class="menu-item menu-selected"><a href="index.html" class="menu-link">Blog Index</a></li>
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<li class="menu-item"><a href="https://code.gnusocial.rocks/" class="menu-link">Repository</a></li>
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<li class="menu-item"><a href="https://coverage.gnusocial.rocks/" class="menu-link">Code Coverage</a></li>
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<li class="menu-item"><a href="https://agile.gnusocial.rocks/" class="menu-link">Wiki</a></li>
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<li class="menu-item"><a href="https://kanban.undefinedhackers.net/?controller=BoardViewController&action=readonly&token=d2293e55cabae7cceff9fb496c651328195357d392b9e61a9f229ed6d463" class="menu-link">Roadmap</a></li>
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</header>
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<div class="content-wrapper">
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<div class="content">
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<div id="template-wrapper"><div class="template-unit">
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<!-- entry begin -->
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<h3><a class="ablack" href="milestone-port-media-handling-from-v2.html">
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Milestone: Port Media handling from v2
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</a></h3>
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<!-- bashblog_timestamp: #202105031337.42# -->
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<div class="subtitle">May 03, 2021 —
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GNU social development team
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</div>
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<!-- text begin -->
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<p><strong><a href="https://agile.gnusocial.rocks/doku.php?id=milestones:attachment_media_embed_handling">>WIKI Milestone entry</a></strong></p>
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<p>File Storage in GNU social is used for avatars, for notes containing
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attachments, and for notes containing links (in which case is an Embed preview).
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Notes can be created by local users or fetched from remote actors. Filehash is
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used to reduce file duplication.</p>
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<p>When a user shares a Link that uses OpenGraph tags or has an OEmbed provider,
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the <a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/Embed">Embed plugin</a> generates a preview for it that may contain a thumbnail.</p>
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<p>When a user shares a Link to an image, the <a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/StoreRemoteMedia">StoreRemoteMedia plugin</a> can fetch the
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file and make it available as an attachment, and will generate a thumbnail.</p>
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<p>When an image, video, or other file type is uploaded or retrieved, an Attachment
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entity is created. When a thumbnail is requested, one is generated if an
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EncoderPlugin that supports the mime type is available.</p>
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<p>There are two EncoderPlugins implemented:</p>
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<ul>
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<li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/ImageEncoder">ImageEncoder</a>: Allows to compress, validate, rescale, and sanitize images using VIPS.</li>
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<li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/VideoEncoder">VideoEncoder</a>: Allows to rescale gifs using FFMpeg.</li>
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</ul>
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<p>Another helpful plugin is <a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/FileQuota">FileQuota</a> which ensures a user stays under the file quota.</p>
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<h2>How is the code organised?</h2>
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<p>There are various entities related to attachment and thumbnail handling.
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The key ones are:</p>
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<ul>
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<li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/src/Entity/Attachment.php">Attachment</a></li>
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<li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/src/Entity/AttachmentThumbnail.php">AttachmentThumbnail</a></li>
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</ul>
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<p>The plugins are able to act by means of the Events system, as elaborated in the
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<a href="https://docs.gnusocial.rocks/developer/storage.html">documentation</a>.</p>
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</div>
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</div></div>
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</div>
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</div></body></html>
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