AddHeader Method
Adds a custom header to send with outgoing messages.
Syntax
stomp.addHeader(key, value, [callback])
Callback
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
function(err){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
err.code err.message
Remarks
This method is used to add user-defined headers to the list of headers held by the Header* properties.
When SendMessage or SendData is called, all headers in the Header* properties are added to the outgoing message.
Note that the STOMP specification defines a number of standard headers necessary for implementing the STOMP protocol. When constructing an outgoing message, the class silently ignores any user-defined headers that are already set by the class.