Hi,
> How about an empty "Subject" line? I know at one point that was considered part of >the valid SIP tests. That's about the only place I can think of where you might >intentionally have an empty parameter. Well, the value of the Subject header is a string, and a string can be empty, so... Regards, Christer Holmberg Ericsson Finland > > > - rob > > -----Original Message----- > From: Christer Holmberg [mailto:[EMAIL PROTECTED]] > Sent: Friday, June 14, 2002 6:45 AM > To: Rob Phillips > Cc: [EMAIL PROTECTED] > Subject: Re: [Sip-implementors] Question on header parsing > > Hi, > > An "empty" Record-Route header is not allowed according to the syntax, so from that >point of view it's an error. > > However, since I can't think (please correct me if I'm wrong) of any header where an >empty value would be allowed, and have a special meaning, I guess it's an >implementation issue if you just ignore the header or treat it > as a syntax error... > > Personally I see no reason why anyone would want to send an empty header in the >first place... > > Regards, > > Christer Holmberg > Ericsson Finland > > Rob Phillips wrote: > > > Suppose a SIP request comes along with a header that has no value, i.e the >Record-Route field below > > > > INVITE sip:[EMAIL PROTECTED] SIP/2.0 > > Via: SIP/2.0/UDP pc33.atlanta.com;branch=z9hG4bK776asdhds > > Max-Forwards: 70 > > To: Bob <sip:[EMAIL PROTECTED]> > > From: Alice <sip:[EMAIL PROTECTED]>;tag=1928301774 > > Call-ID: [EMAIL PROTECTED] > > CSeq: 314159 INVITE > > Contact: <sip:[EMAIL PROTECTED]> > > Record-Route: > > Content-Type: application/sdp > > Content-Length: 142 > > > > Should this be accepted as valid and the Record-Route header ignored, or should it >be returned with an error? I think the spec implies that this is an error, but I >could see where it might be implemented the other way. > > > > - rob > > > > -- > > Rob Phillips, Sr. Software Engineer Netrake Corporation > > mailto: [EMAIL PROTECTED] 3000 Technology Drive > > voice: (214) 291-1096 Suite 100 > > fax: (214) 291-1010 http://www.netrake.com Plano, Texas 75074 > > > > _______________________________________________ > > Sip-implementors mailing list > > [EMAIL PROTECTED] > > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
