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AcceptLanguageParser.go
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AcceptLanguageParser.go
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package parser
import (
"github.com/tutuvss/sip/core"
"github.com/tutuvss/sip/header"
"strconv"
)
/**
* Accept Language body.
* <pre>
*
* Accept-Language = "Accept-Language" ":"
* 1#( language-range [ ";" "q" "=" qvalue ] )
* language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) | "*" )
*
* HTTP RFC 2616 Section 14.4
* </pre>
*
* Accept-Language: da, en-gb;q=0.8, en;q=0.7
*
* @see AcceptLanguageList
*/
/** SIPParser for Accept Language Headers.
*/
type AcceptLanguageParser struct {
HeaderParser
}
/** Constructor
* @param String AcceptLanguage message to parse
*/
func NewAcceptLanguageParser(acceptLanguage string) *AcceptLanguageParser {
this := &AcceptLanguageParser{}
this.HeaderParser.super(acceptLanguage)
return this
}
/** Cosntructor
* @param lexer to set
*/
func NewAcceptLanguageParserFromLexer(lexer core.Lexer) *AcceptLanguageParser {
this := &AcceptLanguageParser{}
this.HeaderParser.superFromLexer(lexer)
return this
}
/** parse the String message
* @return Header (AcceptLanguage object)
* @throws ParseException if the message does not respect the spec.
*/
func (this *AcceptLanguageParser) Parse() (sh header.Header, ParseException error) {
acceptLanguageList := header.NewAcceptLanguageList()
var ch byte
lexer := this.GetLexer()
this.HeaderName(TokenTypes_ACCEPT_LANGUAGE)
for ch, _ = lexer.LookAheadK(0); ch != '\n'; ch, _ = lexer.LookAheadK(0) {
acceptLanguage := header.NewAcceptLanguage()
acceptLanguage.SetHeaderName(core.SIPHeaderNames_ACCEPT_LANGUAGE)
if ch, _ = lexer.LookAheadK(0); ch != ';' { // Content-Coding:
lexer.Match(TokenTypes_ID)
value := lexer.GetNextToken()
acceptLanguage.SetLanguageRange(value.GetTokenValue())
}
for ch, _ = lexer.LookAheadK(0); ch == ';'; ch, _ = lexer.LookAheadK(0) {
lexer.Match(';')
lexer.SPorHT()
lexer.Match('q')
lexer.SPorHT()
lexer.Match('=')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
value := lexer.GetNextToken()
var qv float64
if qv, ParseException = strconv.ParseFloat(value.GetTokenValue(), 32); ParseException != nil {
return nil, ParseException
}
if ParseException = acceptLanguage.SetQValue(float32(qv)); ParseException != nil {
return nil, ParseException
}
lexer.SPorHT()
}
acceptLanguageList.PushBack(acceptLanguage)
if ch, _ = lexer.LookAheadK(0); ch == ',' {
lexer.Match(',')
lexer.SPorHT()
} else {
lexer.SPorHT()
}
}
return acceptLanguageList, nil
}