func (this *SIPParser) SipVersion() (s string, ParseException error) {
if core.Debug.ParserDebug {
this.Dbg_enter("sipVersion")
defer this.Dbg_leave("sipVersion")
}
var tok *core.Token
if tok, ParseException = this.GetLexer().Match(TokenTypes_SIP); ParseException != nil {
return "", this.CreateParseException("Expecting SIP")
}
if tok.GetTokenValue() != "SIP" {
return "", this.CreateParseException("Expecting SIP")
}
this.GetLexer().Match('/')
if tok, ParseException = this.GetLexer().Match(TokenTypes_ID); ParseException != nil {
return "", this.CreateParseException("Expecting SIP/2.0")
}
if tok.GetTokenValue() != "2.0" {
return "", this.CreateParseException("Expecting SIP/2.0")
}
return "SIP/2.0", nil
}
/** a parser for the essential part of the via header.
*/
func (this *ViaParser) ParseVia(v *header.Via) (ParseException error) {
lexer := this.GetLexer()
var protocolName, protocolVersion *core.Token
// The protocol
lexer.Match(TokenTypes_ID)
if protocolName = lexer.GetNextToken(); protocolName.GetTokenValue() != "SIP" {
return this.CreateParseException("Protcoal Not Supported error")
}
lexer.SPorHT()
// consume the "/"
lexer.Match('/')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
lexer.SPorHT()
if protocolVersion = lexer.GetNextToken(); protocolVersion.GetTokenValue() != "2.0" {
return this.CreateParseException("Version Not Supported error")
}
lexer.SPorHT()
// We consume the "/"
lexer.Match('/')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
lexer.SPorHT()
transport := lexer.GetNextToken()
lexer.SPorHT()
protocol := header.NewProtocol()
protocol.SetProtocolName(protocolName.GetTokenValue())
protocol.SetProtocolVersion(protocolVersion.GetTokenValue())
protocol.SetTransport(transport.GetTokenValue())
v.SetSentProtocol(protocol)
// sent-By
hnp := core.NewHostNameParserFromLexer(this.GetLexer())
var hostPort *core.HostPort
if hostPort, ParseException = hnp.GetHostPort(); ParseException != nil {
return ParseException
}
v.SetSentBy(hostPort)
// Ignore blanks
lexer.SPorHT()
var la byte
for la, _ = lexer.LookAheadK(0); la == ';'; la, _ = lexer.LookAheadK(0) {
lexer.Match(';')
lexer.SPorHT()
var nameValue *core.NameValue
if nameValue, ParseException = this.NameValue(); ParseException != nil {
return ParseException
}
name := nameValue.GetName()
nameValue.SetName(strings.ToLower(name))
v.SetParameterFromNameValue(nameValue)
lexer.SPorHT()
}
if la, _ = lexer.LookAheadK(0); la == '(' {
lexer.SelectLexer("charLexer")
lexer.ConsumeK(1)
var comment bytes.Buffer
for {
ch, _ := lexer.LookAheadK(0)
if ch == ')' {
lexer.ConsumeK(1)
break
} else if ch == '\\' {
// Escaped character
tok := lexer.GetNextToken()
comment.WriteString(tok.GetTokenValue())
lexer.ConsumeK(1)
tok = lexer.GetNextToken()
comment.WriteString(tok.GetTokenValue())
lexer.ConsumeK(1)
} else if ch == '\n' {
break
} else {
comment.WriteByte(ch)
lexer.ConsumeK(1)
}
}
v.SetComment(comment.String())
}
return nil
}
