ejabberd模块中的ejabberd_router:route错误

Question

我正在尝试在ejabberd中创建一个简单的echo机器人。我可以让mod_echo工作得很好，而且我非常确定我曾经有过自己的版本(调试在我的头脑里玩了不少把戏)。我得到了下面的错误，但我不知道下一步该怎么做来调试它。似乎有一个路由问题，但不太确定原因。有什么建议吗？

2016-03-31 16:49:38.350 [debug] <0.448.0>@ejabberd_router:do_route:324 route
    from {jid,<<"user1">>,<<"alchemy.local">>,<<"alchemy">>,<<"user1">>,<<"alchemy.local">>,<<"alchemy">>}
    to {jid,<<>>,<<"echo.alchemy.local">>,<<>>,<<>>,<<"echo.alchemy.local">>,<<>>}
    packet {xmlel,<<"message">>,[{<<"xml:lang">>,<<"en">>},{<<"to">>,<<"echo.alchemy.local">>},{<<"id">>,<<"aacca">>}],[{xmlcdata,<<"\n">>},{xmlel,<<"subject">>,[],[]},{xmlcdata,<<"\n">>},{xmlel,<<"body">>,[],[{xmlcdata,<<"testme">>}]},{xmlcdata,<<"\n">>},{xmlel,<<"nick">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/nick">>}],[{xmlcdata,<<"user1">>}]},{xmlcdata,<<"\n">>}]}
2016-03-31 16:49:38.351 [error] <0.448.0>@ejabberd_router:route:77 {function_clause,[{mod_echobot,route,[{jid,<<"user1">>,<<"alchemy.local">>,<<"alchemy">>,<<"user1">>,<<"alchemy.local">>,<<"alchemy">>},{jid,<<>>,<<"echo.alchemy.local">>,<<>>,<<>>,<<"echo.alchemy.local">>,<<>>},{xmlel,<<"message">>,[{<<"xml:lang">>,<<"en">>},{<<"to">>,<<"echo.alchemy.local">>},{<<"id">>,<<"aacca">>}],[{xmlcdata,<<"\n">>},{xmlel,<<"subject">>,[],[]},{xmlcdata,<<"\n">>},{xmlel,<<"body">>,[],[{xmlcdata,<<"testme">>}]},{xmlcdata,<<"\n">>},{xmlel,<<"nick">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/nick">>}],[{xmlcdata,<<"user1">>}]},{xmlcdata,<<"\n">>}]}],[{file,"mod_echobot.erl"},{line,86}]},{ejabberd_router,route,3,[{file,"src/ejabberd_router.erl"},{line,75}]},{ejabberd_c2s,check_privacy_route,5,[{file,"src/ejabberd_c2s.erl"},{line,2121}]},{ejabberd_c2s,session_established2,2,[{file,"src/ejabberd_c2s.erl"},{line,1288}]},{p1_fsm,handle_msg,10,[{file,"src/p1_fsm.erl"},{line,582}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,237}]}]}
when processing: {{jid,<<"user1">>,<<"alchemy.local">>,<<"alchemy">>,<<"user1">>,<<"alchemy.local">>,<<"alchemy">>},{jid,<<>>,<<"echo.alchemy.local">>,<<>>,<<>>,<<"echo.alchemy.local">>,<<>>},{xmlel,<<"message">>,[{<<"xml:lang">>,<<"en">>},{<<"to">>,<<"echo.alchemy.local">>},{<<"id">>,<<"aacca">>}],[{xmlcdata,<<"\n">>},{xmlel,<<"subject">>,[],[]},{xmlcdata,<<"\n">>},{xmlel,<<"body">>,[],[{xmlcdata,<<"testme">>}]},{xmlcdata,<<"\n">>},{xmlel,<<"nick">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/nick">>}],[{xmlcdata,<<"user1">>}]},{xmlcdata,<<"\n">>}]}}
2016-03-31 16:50:16.356 [debug] <0.447.0>@ejabberd_receiver:process_data:282 Received XML on stream = <<"\n">>

Answer 1

似乎在代码示例(来自我在网上找到的一个较旧的示例)消息中，我需要在子句中使用<<“https://gist.github.com/stevenlivz/d666200595a23c42b2a662fef87bf281”>>才能实际匹配，而我使用的示例代码没有这样做，只使用"message“，依此类推。另外，还值得注意的是，xmlelement现在是xmlel，因此子句也需要更新。例如。

route(From, To, {xmlel, <<"message">>, _, _} = Packet) ->