149 lines
4.4 KiB
HTML
149 lines
4.4 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<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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<div class="home-menu menu menu-horizontal menu-fixed">
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<a class="header-main" href="/"><img src="../assets/img/gnu-social-logo-invert.svg" alt="GNU social"><b>gnu</b>social</a>
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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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<!-- text end -->
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</div>
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<footer>
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This site's source is <a href="https://code.undefinedhackers.net/GNUsocial/gnusocial.rocks">hosted here</a>.
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