Question

我有一个形式为的用户名字符串 “hello1 @ devlab，hello2 @ devlab，hello3 @ devlab” 这个String可以有N个用户名。

我想将其转换为格式的数据包：

Packet_in_tuple_form={xmlel,<<"message">>,[{<<"id">>,<<"rkX6Q-8">>},{<<"to">>,<<"multicast.devlab">>}],[{xmlel,<<"body">>,[],[{xmlcdata,<<"ABCMSG">>}]},{xmlel,<<"addresses">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/address">>}],
[
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello1@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]},
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello2@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]},
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello3@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]}
]
}]},

相应地，这个数据包应该能够通过添加额外的xmlel元组来实现N个用户名[根据字符串中的用户名数量]： -

Packet_in_tuple_form={xmlel,<<"message">>,[{<<"id">>,<<"rkX6Q-8">>},{<<"to">>,<<"multicast.devlab">>}],[{xmlel,<<"body">>,[],[{xmlcdata,<<"ABCMSG">>}]},{xmlel,<<"addresses">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/address">>}],
[
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello1@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]},
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello2@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]},
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello3@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]},
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello4@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]},
{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,<<"hello5@devlab">>},{<<"desc">>,<<"description goes here!">>}],[]}
]
}]},

我怎样才能实现这个目标？

谢谢＆amp;此致

Answer 1

以下是如何将字符串转换为地址列表的示例：

Str = "hello1@devlab, hello2@devlab, hello3@devlab",
Addrs = [I || I <- string:tokens(Str, ", ")].

因此，可以从Addrs生成数据包的地址列表，如下所示：

[{xmlel,<<"address">>,[{<<"type">>,<<"to">>},{<<"jid">>,list_to_binary(JID)},{<<"desc">>,<<"description goes here!">>}],[]} || JID <- Addrs].

ERLANG将字符串转换为元组列表

1 个答案: