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XEP-0066: Out of Band Data 带外字节流，带内不行就走带外，也就是不经过XMPP服务器。这个用法是在发起传输的客户端临时建立一个http服务(当然也可以是别的服务)，把自己的 IP和端口（通过XMPP消息）告诉接收方，让对方直接来下载。这个方法有一个问题，发送一方必须是公网IP，否则对方无法访问。 注：目前Pandion，Linq支持这个XEP。
XEP-0066: Out of Band Data
| Abstract: | This specification defines two XMPP protocol extensions for communicating URIs, one for use in XMPP message stanzas and the other for use in a structured request-response interaction via XMPP IQ stanzas. Among other things, this enables one entity to inform another entity about a file that is available at an HTTP URL. |
| Author: | Peter Saint-Andre |
| Copyright: | © 1999 – 2015 XMPP Standards Foundation. SEE LEGAL NOTICES. |
| Status: | Draft |
| Type: | Standards Track |
| Version: | 1.5 |
| Last Updated: | 2006-08-16 |
A.14 XEP-0066 (Out of Band Data)
jabber.el will display URLs sent in message stanzas qualified by the
jabber:x:oobnamespace, as described in this XEP. Sending such URLs or doing anything with iq stanzas (using thejabber:iq:oobnamespace) is not supported.
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