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mod_muc_media_metadata/mod_muc_media_metadata.lua @ 5931:d194d1012fd3
Updating dox for mod_rest. Ideas expressed / clarified:
1) Making clear that mod_rest isn't to be installed under VirtualHosts AND as a component.
2) Understanding some of the implications of this choice:
A) Changes to user authentication
B) How it affects subdomains
3) More consistent use of domain names for clarity.
4) Using different heading sizes to show scope of section.
Essentially, I added all the tidbits I had to clarify in getting this to work in my
own example.
author | Ben Smith <bens@effortlessis.com> |
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date | Mon, 13 May 2024 13:25:13 -0700 |
parent | 3688:d4537f045a78 |
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local async = require "util.async"; local promise = require "util.promise"; local http = require "net.http"; local st = require "util.stanza"; local xmlns_metadata = "xmpp:prosody.im/protocol/media-metadata#0" local fetch_headers = { bytes = "content-length"; type = "content-type"; etag = "etag"; blurhash = "blurhash"; }; local function fetch_media_metadata(url) return promise.new(function (resolve) http.request(url, { method = "HEAD" }, function (body, code, response) --luacheck: ignore 212/body if code == 200 then local metadata = {}; for metadata_name, header_name in pairs(fetch_headers) do metadata[metadata_name] = response.headers[header_name]; end resolve(metadata); else resolve(nil); end end); end); end local function metadata_to_tag(metadata) if not metadata then return; end local metadata_tag = st.stanza("metadata", { xmlns = xmlns_metadata }); for k, v in pairs(metadata) do metadata_tag:text_tag(k, v) end return metadata_tag; end module:hook("muc-occupant-groupchat", function (event) local stanza = event.stanza; local promises; for oob in stanza:childtags("x", "jabber:x:oob") do if not promises then promises = {}; end local url = oob:get_child_text("url"); local p = fetch_media_metadata(url) :next(metadata_to_tag) :next(function (metadata_tag) oob:add_child(metadata_tag); end); table.insert(promises, p); end if not promises then return; end async.wait(promise.all(promises)); end);