官方文档note很清楚的，

Example 3. A content message with receipt requested

<message
    from='northumberland@shakespeare.lit/westminster'
    id='richard2-4.1.247'
    to='kingrichard@royalty.england.lit/throne'>
  <body>My lord, dispatch; read o'er these articles.</body>
  <requestxmlns='urn:xmpp:receipts'/>
</message>
 

Note: A sender MUST include an 'id' attribute on every content message that requests a receipt, so that the sender can properly track ack messages.

posted @ 2014-01-08 17:02  路在脚下，  阅读(154)  评论(0)  编辑  收藏  举报