XMPP核心协议学习心得2

4.资源绑定

服务器向客户端声明资源绑定特性:

<stream:stream

    xmlns='jabber:client'

    xmlns:stream='http://etherx.jabber.org/streams'

    id='c2s_345'

    from='example.com'

    version='1.0'>

<stream:features>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>

</stream:features>

_{客户端请求资源绑定}

<iq type='set' id='bind_1'>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>

</iq>

或者指定绑定的资源ID

<iq type='set' id='bind_2'>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>

    <resource>resourceid</resource>

  </bind>

</iq>

此时有两种：

成功

服务器反馈绑定成功

 <iq type='result' id='bind_2'>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>

    <jid>[email protected]/resourceid</jid>

  </bind>

</iq>

注意  此时 id已经被服务器修改成'bind_2' 而不是指定resourceid

失败

资源ID不能处理

  <iq type='error' id='bind_2'>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>

    <resource>someresource</resource>

  </bind>

  <error type='modify'>

    <bad-request xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>

  </error>

</iq>

或

客户端不允许绑定一个资源

  <iq type='error' id='bind_2'>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>

    <resource>someresource</resource>

  </bind>

  <error type='cancel'>

    <not-allowed xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>

  </error>

</iq>

或资源ID已经在使用

<iq type='error' id='bind_2'>

  <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>

    <resource>someresource</resource>

  </bind>

  <error type='cancel'>

    <conflict xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>

  </error>

</iq>