如何从ejabberd数据包对象中获取数据？

Question

我有一个带有数据包数据的打印日志，我使用Packet#message.sub_els提取了子元素，它给了我这样的数组：

[
    {xmlel,<<"delay">>,[{<<"xmlns">>,<<"urn:xmpp:delay">>},{<<"stamp">>,<<"2019-10-24T08:08:15.126+00:00">>}],[]},
    {xmlel,<<"type">>,[{<<"xmlns">>,<<"urn:xmpp:media">>}],[{xmlcdata,<<"1">>}]},
    {xmlel,<<"media">>,[{<<"xmlns">>,<<"urn:xmpp:data">>}],[{xmlcdata,<<"null">>}]},
    {xmlel,<<"extra">>,[{<<"xmlns">>,<<"urn:xmpp:extra">>}],[{xmlcdata,<<"{\"type\":\"chat\",\"id\":\"5d666434ae920b04875c0a57\",\"name\":\"X003\",\"username\":\"x003\",\"status\":\"\",\"profile_picture\":\"\"}">>}]},
    {xmlel,<<"request">>,[{<<"xmlns">>,<<"urn:xmpp:receipts">>}],[]},
    {xmlel,<<"request">>,[{<<"xmlns">>,<<"urn:xmpp:read">>}],[]}
],

现在，我想添加其他类型，媒体，其他。等

Answer 1

请参阅指导xmpp库的开发人员文档：https://docs.ejabberd.im/developer/guide/#xmpp-module