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SNAC(5) File Formats Manual SNAC(5) NAME snac -- message formatting and file format documentation DESCRIPTION The snac daemon processes messages from other servers in the Fediverse using the ActivityPub protocol. This manual describes the allowed formatting of note messages and the disk storage layout of snac server and user data. For the operation manual, see snac(1). For the administration manual, see snac(8). Message Formatting Message notes respect the entered new line breaks rigurously. A spe- cial subset of Markdown is allowed, including: bold **text between two pairs of asterisks** italic *text between a pair of asterisks* strikethrough text ~~text between a pair of tildes~~ underlined text __text between two pairs of underscores__ code Text `between backticks` is formatted as code. ``` /* text between lines with only three backticks is preformatted */ int main(int argc, char *argv[]) { return 0; } ``` links Standalone URLs are converted to links. Also, from version 2.54, markdown-style links in the form of [link label](url) are also supported. attached images Standalone URLs for which the final extension is recognized as an image (.jpg, .gif, .png, etc), are converted to Ac- tivityPub image attachments. Also, from version 2.57, mark- down-style image links in the form of  are also supported. line separators Horizonal rules can be inserted by typing three minus sym- bols alone in a line. quoted text Lines starting with >. headers One, two or three # at the beginning of a line plus a space plus some text are converted to HTML headers. user mentions Strings in the format @user@host are requested using the Webfinger protocol and converted to links and mentions if something reasonable is found. emoticons /emojis / smileys / silly symbols (Note: from version 2.51, these symbols are configurable by the instance administrator, so the available ones may dif- fer). The following traditional ASCII emoticons or special strings are converted to related emojis: :-) :-D X-D ;-) B-) :-( :-* <3 :-/ 8-o %-) :_( :-| >:-( :facepalm: :shrug: :shrug2: :eyeroll: :beer: :beers: :munch: :thumb: Accepted HTML All HTML tags in entries are neutered except the following ones: a p br blockquote ul ol li cite small h2 h3 span i b u s pre code em strong hr img del Disk Layout This section documents version 2.7 of the disk storage layout. The base directory contains the following files and folders: server.json Server configuration. user/ Directory holding user subdirectories. object/ Directory holding the ActivityPub objects. Filenames are hashes of each message Id, stored in subdirectories start- ing with the first two letters of the hash. queue/ This directory contains the global queue of input/output messages as JSON files. File names contain timestamps that indicate when the message will be sent. Messages not ac- cepted by their respective servers will be re-enqueued for later retransmission until a maximum number of retries is reached, then discarded. inbox/ Directory storing collected inbox URLs from other in- stances. archive/ If this directory exists, all input and output messages are logged inside it, including HTTP headers. Only useful for debugging. May grow to enormous sizes. error/ If this directory exists, HTTP signature check error head- ers are logged here. Only useful for debugging. log/ If this directory exists, log messages are also stored there in daily files. app/ This directory stores Mastodon API apps. token/ This directory stores Mastodon API tokens. style.css The server-wide CSS. The content of this file is inserted into the HTML output unless a user-specific one exist in the user's static/ folder. greeting.html This file is served when the server base URL is requested from a web browser. See snac(8) for more information about the customization options. public.idx This file contains the list of public posts from all users in the server. filter_reject.txt This (optional) file contains a list of regular expres- sions, one per line, to be applied to the content of all incoming posts; if any of them match, the post is rejected. This brings the flexibility and destruction power of regu- lar expressions to your Fediverse experience. To be used wisely (see snac(8) for more information). announcement.txt If this file is present, an announcement will be shown to logged in users on every page with its contents. It is also available through the Mastodon API. Users can dismiss the announcement, which works by storing the modification time in the "last_announcement" field of the user.json file. When the file is modified, the announcement will then reap- pear. It can contain only text and will be ignored if it has more than 2048 bytes. Each user directory is a subdirectory of BASEDIR/user/, has the user id as name and contains the following subdirectories and files: user.json User configuration file. user_o.json User configuration override file. This file is intended for administrators to override some user preferences. For cur- rent version, the fields that can be overridden are 'purge_days' and 'email'. key.json Secret/public key PEM data. followers.idx This file contains the list of followers as a list of hashed object identifiers. followers/ This directory stores hard links to the actor objects in the object storage. following/ This directory stores the users being followed as hard links to the 'Follow' or 'Accept' objects in the object storage. File names are the hashes of each actor Id. private/ This directory stores hard links to the timeline entries in the object storage. private.idx This file contains the list of timeline entries as a list of hashed object identifiers. public/ This directory stores hard links to the public timeline en- tries in the object storage. public.idx This file contains the list of public timeline entries as a list of hashed object identifiers. pinned/ This directory stores hard links to pinned posts. pinned.idx This file contains the list of pinned posts as a list of hashed object identifiers. bookmark/ This directory stores hard links to bookmarked posts. bookmark.idx This file contains the list of pinned posts as a list of hashed object identifiers. draft/ This directory stores post drafts. draft.idx This file contains the list of drafts as a list of hashed object identifiers. muted/ This directory contains files which names are hashes of muted actors. The content is a line containing the actor URL. Messages from these actors will be ignored on input and not shown in any timeline. hidden/ This directory contains references to the hidden timeline entries. limited/ This directory contains references to the actor URLs for limited users (those being followed but with their boosts blocked). queue/ This directory contains the output queue of messages gener- ated by the user as JSON files. File names contain time- stamps that indicate when the message will be sent. Mes- sages not accepted by their respective servers will be re- enqueued for later retransmission until a maximum number of retries is reached, then discarded. static/ Files in this directory are served as-is when requested from the https://HOST/USER/s/... URL path. A special file named style.css can contain user-specific CSS code to be inserted into the HTML of the web interface. history/ This directory contains generated HTML files. They may be snapshots of the local timeline in previous months or other cached data. export/ This directory will contain exported data in Mastodon-com- patible CSV format after executing the 'export_csv' com- mand-line operation. import/ Mastodon-compatible CSV files must be copied into this di- rectory to use any of the importing functions. server.pid This file stores the server PID in a single text line. SEE ALSO snac(1), snac(8) AUTHORS grunfink @grunfink@comam.es: https://comam.es/snac/grunfink LICENSE See the LICENSE file for details. FreeBSD Ports 14.quarterly $Mdocdate$ SNAC(5)
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