xmpp Stream Negotiation Starting a stream

Example

Once a TCP connection is established, the initial stream header is sent by the initiating entity. Similarly, whenever a stream restart is required (eg. after negotiating a security layer such as TLS) a stream header must also be sent:

<?xml version='1.0'?>
<stream:stream
    from='[email protected]'
    to='im.example.com'
    version='1.0'
    xml:lang='en'
    xmlns='jabber:client'
    xmlns:stream='http://etherx.jabber.org/streams'>

The XML header is optional, but if it exists it must not specify anything other than XML version 1.0 with UTF-8 encoding.

In response, the receiving entity will send its own opening stream tag containing a unique session ID:

<?xml version='1.0'?>
<stream:stream
    from='im.example.com'
    id='++TR84Sm6A3hnt3Q065SnAbbk3Y='
    to='[email protected]'
    version='1.0'
    xml:lang='en'
    xmlns='jabber:client'
    xmlns:stream='http://etherx.jabber.org/streams'>