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mod_muc_media_metadata/mod_muc_media_metadata.lua @ 5126:5784ff4f3b76
mod_rest: Fix reference in OpenAPI
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 31 Dec 2022 17:09:18 +0100 |
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);