ejabberd-18.12：在钩子内解析数据包

Question

挂钩代码：

user_receive_packet({Packet, #{jid := JID} = C2SState}) ->
    ?INFO_MSG("~p.", [Packet]),
    {Packet, C2SState}.

输出：

{message,<<"49a85099-6fa6-4aa5-84ab-bced89adf847">>,groupchat,<<"en">>,{jid,<<"sgj279_59f990094dd64c4846cc38c5_59fa99bbfdbd1ab22e59df29">>,<<"conference.localhost">>,<<"localhost">>,<<"sgj279_59f990094dd64c4846cc38c5_59fa99bbfdbd1ab22e59df29">>,<<"conference.localhost">>,<<"localhost">>},{jid,<<"test1">>,<<"localhost">>,<<"49921480726720246332274">>,<<"test1">>,<<"localhost">>,<<"49921480726720246332274">>},[],[{text,<<>>,<<"{\"type\":\"text\",\"payload\":{\"body\":\"a beautiful\"}}">>}],undefined,[{mam_archived,{jid,<<"sgj279_59f990094dd64c4846cc38c5_59fa99bbfdbd1ab22e59df29">>,<<"conference.localhost">>,<<>>,<<"sgj279_59f990094dd64c4846cc38c5_59fa99bbfdbd1ab22e59df29">>,<<"conference.localhost">>,<<>>},<<"1549043294480251">>},{stanza_id,{jid,<<"sgj279_59f990094dd64c4846cc38c5_59fa99bbfdbd1ab22e59df29">>,<<"conference.localhost">>,<<>>,<<"sgj279_59f990094dd64c4846cc38c5_59fa99bbfdbd1ab22e59df29">>,<<"conference.localhost">>,<<>>},<<"1549043294480251">>}],#{ip => {0,0,0,0,0,0,0,1},mam_archived => true,muc_sender_real_jid => {jid,<<"test1">>,<<"localhost">>,<<"49921480726720246332274">>,<<"test1">>,<<"localhost">>,<<"49921480726720246332274">>},stanza_id => 1549043294480251}}.

我想读取 stanza_id 字段值和 mam_archived

下列出的时间戳

解析任何字段的语法是什么？

Answer 1

尝试：

?INFO_MSG("Stanza ID: ~p", [ maps:get(stanza_id, Packet#message.meta) ]),

ejabberd-18.12：在钩子内解析数据包

ejabberd-18.12 : parse Packet inside hook

ejabberd

ejabberd-module

ejabberd-api

ejabberd-hooks