本文介绍了一条具体的 SIP (会话发起协议) NOTIFY 消息实例, 包括消息头字段及其含义, 如 Via、To 和 From 字段等。此外, 还解释了消息体采用 XML 格式来描述对话事件。
10、NOTIFY消息
参考消息实例如下所示：
NOTIFY sip:tyoung@parlour.elasticity.co.uk SIP/2.0
Via SIP/2.0/UDP cartouche.rosettastone.org:5060; branch=z9hG4bK3841323
Max-Forwards: 70
To: Thomas Young <sip:tyoung@elasticity.co.uk>; tag=1814
From: <sip:ptolemy@rosettastone.org>; tag=5363956k
Call-ID: 452k59252058dkfj34924lk34
CSeq: 3 NOTIFY
Contact: <sip:Ptolemy@cartouche.rosettastone.org>
Event: dialog
Subscription-State: active
Allow-Event: dialog
Content-Type: application/xml + dialog
Content-Length: 消息体长度
(xml格式的消息体 
)
参考消息实例如下所示：
NOTIFY sip:tyoung@parlour.elasticity.co.uk SIP/2.0Via SIP/2.0/UDP cartouche.rosettastone.org:5060; branch=z9hG4bK3841323Max-Forwards: 70To: Thomas Young <sip:tyoung@elasticity.co.uk>; tag=1814From: <sip:ptolemy@rosettastone.org>; tag=5363956kCall-ID: 452k59252058dkfj34924lk34CSeq: 3 NOTIFYContact: <sip:Ptolemy@cartouche.rosettastone.org>Event: dialogSubscription-State: activeAllow-Event: dialogContent-Type: application/xml + dialogContent-Length: 消息体长度(xml格式的消息体 )
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