[reSIProcate-users] Why is '%2F' being un-escaped?

["Wong Kok Meng-a17866" <kokmeng.wong@xxxxxxxxxxxx>]

Hi,

I have this piece of code:

  std::string requestUri("sip:test%2Ftest@xxxxxxxxxx:5060");
  resip::NameAddr targetUri;
  targetUri = resip::NameAddr(requestUri.c_str());
  ::sprintf(stderr, "targetUri: \"%s\"",
targetUri.uri().toString().c_str());

When I execute it, I found that the output is
"sip:test/test@xxxxxxxxxx:5060". I am surprised that it automatically
decode "%2F" and convert it to '/'.

I investigated the code resip/stack/Uri.cxx, it is because of these few
lines of code in Uri::parse():

   if (!pb.eof())
   {
      pb.reset(start);
      start = pb.position();
      pb.skipToOneOf(":@");
#ifdef HANDLE_CHARACTER_ESCAPING
      pb.dataUnescaped(mUser, start);
#else
      pb.data(mUser, start);
#endif

As I understand from RFC2396 section 3.2.2, '/' is not one of the
allowed characters in the userinfo component, so why does the resip code
un-escape "%2F" to '/' but does not escape it back?

Thank you very much for your time.

Regards,
Kok Meng, Wong