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8df93ba39e
Rewrites the asset_cache system to handle sending assets to a CDN via a webroot. see https://github.com/MrStonedOne/tgstation/blob/asset-cdn/code/modules/asset_cache/readme.md Fixed a lot of bugs with assets, removed some dead code. Changes: Moved asset cache code to transport datums, the currently loaded one is located at SSassets.transport, asset cache calls made before the config is loaded use the simple browse_rsc transport. Added subsystem call for when the config loads or reloads. Added a webroot CDN asset transport. assets are saved to a file in a format based on the file's hash (currently md5). Assets that don't use get_asset_url or get_url_mappings (such as browser assets referred to by static html files like changelog.html or static css files) can be saved to browse_rsc even when in cdn asset mode by setting legacy to TRUE on the datum returned by register_assets Added a system for saving assets on a cdn in a hash based namespace (folder), assets within the same namespace will always be able to refer to each other by relative names. (used to allow cdn'ing font awesome without having to make something that regenerates it's css files.). The simple/namespaced asset cache datum helper will handle generating a namespace composed of the combined md5 of everything in the same datum, as well as registering them properly. Moved external resource from a snowflake loaded file to a config entry, added it to resources.txt To ensure the system breaks in local testing in any situation that wouldn't work in cdn mode, the simple transport will mutate the filenames of non-legacy and non-namespaced assets and return this with get_asset_url. Simple transport's passive send of all roundstart assets to all clients is now a config that defaults to off. this is to break race conditions during local testings from devs accidentally relying on this instead of using send() properly. cl refactor: Interface assets (js/css/images) can now be managed using an external webserver instead of byond's one at a time file transfer queue. admin: Adds admin verb toggle-cdn that allows admins to disable the external webserver asset transport and revert to the old system. Useful if the webserver backing this goes down (thanks cloudflare). config: New config file, resources.txt, (must be loaded by an $include statement from the main config) server: The external_rsc_urls.txt config has been moved to the main config system. /cl Porting notes: Interface webpages must refer to their assets (css/js/image/etc) by a generated url, or the asset must register itself as a legacy asset. The system is designed to break in localtest (on simple/legacy mode) in most situations that would break in cdn mode. Requires latest tgui. The webserver must set the proper CORS headers for font files or font awesome (and other fonts) won't load. /tg/'s webserver config: https://gist.github.com/MrStonedOne/523388b2f161af832292d98a8aad0eae
36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
/**
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* # asset_cache_item
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*
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* An internal datum containing info on items in the asset cache. Mainly used to cache md5 info for speed.
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**/
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/datum/asset_cache_item
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var/name
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var/hash
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var/resource
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var/ext = ""
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var/legacy = FALSE //! Should this file also be sent via the legacy browse_rsc system when cdn transports are enabled?
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var/namespace = null //! used by the cdn system to keep legacy css assets with their parent css file. (css files resolve urls relative to the css file, so the legacy system can't be used if the css file itself could go out over the cdn)
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var/namespace_parent = FALSE //! True if this is the parent css or html file for an asset's namespace
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/datum/asset_cache_item/New(name, file)
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if (!isfile(file))
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file = fcopy_rsc(file)
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hash = md5(file)
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if (!hash)
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hash = md5(fcopy_rsc(file))
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if (!hash)
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CRASH("invalid asset sent to asset cache")
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debug_world_log("asset cache unexpected success of second fcopy_rsc")
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src.name = name
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var/extstart = findlasttext(name, ".")
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if (extstart)
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ext = ".[copytext(name, extstart+1)]"
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resource = file
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/datum/asset_cache_item/vv_edit_var(var_name, var_value)
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return FALSE
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/datum/asset_cache_item/CanProcCall(procname)
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return FALSE
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