Unable to access custom header on incoming message

[gaaf]

Hi,

In the call controller's RecvEvent function, I'd like to be able to read the value of a custom SIP header (like X-MyHeader:) from the INVITE. I've been unable to find a way to do that. How to access these?

I tried CCEventTry.GetExtraHeaders(), but that returns an empty list.

[bambyster]

Hi,

The way to do it is to get that header within the CallMap.OnNewDialog() by using req.GetHFs("X-MyHeader''). After that you may put the retrieved value into newly created CallController object so it is already available before the CallController::RecvEvent() is called.

[gaaf]

Thanks, I'll try that.

I think it is still weird that CCEventTry.GetExtraHeaders() does return an empty list. IMHO, it should return all (non-standard or unparsed) headers.

And I have the same question for reading a header in an incoming BYE.

[bambyster]

The only way to take a header from BYE is to inherit your own class from the sippy.Ua class and override the RecvRequest() method. It's a bit tricky however because golang does not support virtual class methods and which is why the NewUA() constructor has that heir parameter:

type MyUA struct {
    sippy.Ua
}

func NewMyUA() *MyUA {
    self := &MyUA{}
    self.Ua = *sippy.NewUA(sip_tm, config, nh_address, cc, cc.lock, self)
    return self
}

func (self *MyUA) RecvRequest(req sippy_types.SipRequest, t sippy_types.ServerTransaction) *sippy_types.Ua_context {
    if req.Method() == "BYE" {
        hfs := req.GetHFs(...)
    }
    return self.Ua.RecvRequest(req, t)
}