|
public GetStringValue ( |
||
| token | ||
| Résultat | string | |
static bool TryParseElement(Lexer lexer, out NameValueHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
parsedValue = new NameValueHeaderValue()
{
Name = lexer.GetStringValue(t),
};
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
if (t == Token.Type.Token || t == Token.Type.QuotedString)
{
parsedValue.value = lexer.GetStringValue(t);
t = lexer.Scan();
}
else
{
return(false);
}
}
return(true);
}
static bool TryParseElement(Lexer lexer, out ProductHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
parsedValue = new ProductHeaderValue();
parsedValue.Name = lexer.GetStringValue(t);
t = lexer.Scan();
if (t == Token.Type.SeparatorSlash)
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
parsedValue.Version = lexer.GetStringValue(t);
t = lexer.Scan();
}
return(true);
}
internal static Token?TryParseMediaType(Lexer lexer, out string media)
{
media = null;
var token = lexer.Scan();
if (token != Token.Type.Token)
{
return(null);
}
if (lexer.Scan() != Token.Type.SeparatorSlash)
{
return(null);
}
var token2 = lexer.Scan();
if (token2 != Token.Type.Token)
{
return(null);
}
media = lexer.GetStringValue(token) + "/" + lexer.GetStringValue(token2);
return(lexer.Scan());
}
static bool TryParseElement(Lexer lexer, out StringWithQualityHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var value = new StringWithQualityHeaderValue();
value.Value = lexer.GetStringValue(t);
t = lexer.Scan();
if (t == Token.Type.SeparatorSemicolon)
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var s = lexer.GetStringValue(t);
if (s != "q" && s != "Q")
{
return(false);
}
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
return(false);
}
t = lexer.Scan();
double d;
if (!lexer.TryGetDoubleValue(t, out d))
{
return(false);
}
if (d > 1)
{
return(false);
}
value.Quality = d;
t = lexer.Scan();
}
parsedValue = value;
return(true);
}
public static bool TryParse(string input, out RangeConditionHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
bool is_weak;
if (t == Token.Type.Token)
{
if (lexer.GetStringValue(t) != "W")
{
DateTimeOffset date;
if (!Lexer.TryGetDateValue(input, out date))
{
return(false);
}
parsedValue = new RangeConditionHeaderValue(date);
return(true);
}
if (lexer.PeekChar() != '/')
{
return(false);
}
is_weak = true;
lexer.EatChar();
t = lexer.Scan();
}
else
{
is_weak = false;
}
if (t != Token.Type.QuotedString)
{
return(false);
}
if (lexer.Scan() != Token.Type.End)
{
return(false);
}
parsedValue = new RangeConditionHeaderValue(
new EntityTagHeaderValue()
{
Tag = lexer.GetStringValue(t),
IsWeak = is_weak
});
return(true);
}
static bool TryParseElement(Lexer lexer, out ProductInfoHeaderValue parsedValue)
{
string comment;
parsedValue = null;
Token t;
if (lexer.ScanCommentOptional(out comment, out t))
{
if (comment == null)
{
return(false);
}
parsedValue = new ProductInfoHeaderValue();
parsedValue.Comment = comment;
return(true);
}
if (t == Token.Type.End)
{
return(true);
}
if (t != Token.Type.Token)
{
return(false);
}
var value = new ProductHeaderValue();
value.Name = lexer.GetStringValue(t);
var pos = lexer.Position;
t = lexer.Scan();
if (t == Token.Type.SeparatorSlash)
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
value.Version = lexer.GetStringValue(t);
}
else
{
lexer.Position = pos;
}
parsedValue = new ProductInfoHeaderValue(value);
return(true);
}
static bool TryParseCollection(Lexer lexer, out List <NameValueHeaderValue> result, Token.Type separator)
{
var list = new List <NameValueHeaderValue> ();
result = null;
Token t;
do
{
var attr = lexer.Scan();
if (attr != Token.Type.Token)
{
return(false);
}
string value = null;
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
if (t != Token.Type.Token && t != Token.Type.QuotedString)
{
return(false);
}
value = lexer.GetStringValue(t);
t = lexer.Scan();
}
if (t == separator || t == Token.Type.End)
{
list.Add(new NameValueHeaderValue()
{
Name = lexer.GetStringValue(attr),
value = value
});
}
else
{
return(false);
}
} while (t == separator);
result = list;
return(true);
}
static bool TryParseElement(Lexer lexer, out TransferCodingWithQualityHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var result = new TransferCodingWithQualityHeaderValue();
result.value = lexer.GetStringValue(t);
t = lexer.Scan();
// Parameters parsing
if (t == Token.Type.SeparatorSemicolon && (!NameValueHeaderValue.TryParseParameters(lexer, out result.parameters, out t) || t != Token.Type.End))
{
return(false);
}
parsedValue = result;
return(true);
}
internal static bool TryParse <T> (string input, out T parsedValue, Func <T> factory) where T : TransferCodingHeaderValue
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var result = factory();
result.value = lexer.GetStringValue(t);
t = lexer.Scan();
// Parameters parsing
if (t == Token.Type.SeparatorSemicolon)
{
if (!NameValueHeaderValue.TryParseParameters(lexer, out result.parameters))
{
return(false);
}
}
else if (t != Token.Type.End)
{
return(false);
}
parsedValue = result;
return(true);
}
internal static bool TryParseParameters(Lexer lexer, out List <NameValueHeaderValue> result, out Token t)
{
var list = new List <NameValueHeaderValue> ();
result = null;
while (true)
{
var attr = lexer.Scan();
if (attr != Token.Type.Token)
{
t = Token.Empty;
return(false);
}
string value = null;
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
if (t != Token.Type.Token && t != Token.Type.QuotedString)
{
return(false);
}
value = lexer.GetStringValue(t);
t = lexer.Scan();
}
list.Add(new NameValueHeaderValue()
{
Name = lexer.GetStringValue(attr),
value = value
});
if (t == Token.Type.SeparatorSemicolon)
{
continue;
}
result = list;
return(true);
}
}
public static bool TryParse(string input, out NameValueHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
if (t != Token.Type.Token && t != Token.Type.QuotedString)
{
return(false);
}
string v = null;
var token2 = lexer.Scan();
if (token2 != Token.Type.End)
{
if (token2 != Token.Type.SeparatorEqual)
{
return(false);
}
token2 = lexer.Scan();
if (token2 == Token.Type.Token || token2 == Token.Type.QuotedString)
{
v = lexer.GetStringValue(token2);
token2 = lexer.Scan();
}
if (token2 != Token.Type.End)
{
return(false);
}
}
parsedValue = new NameValueHeaderValue()
{
Name = lexer.GetStringValue(t),
value = v
};
return(true);
}
static bool TryParseElement(Lexer lexer, out NameValueWithParametersHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
parsedValue = new NameValueWithParametersHeaderValue()
{
Name = lexer.GetStringValue(t),
};
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
if (t == Token.Type.Token || t == Token.Type.QuotedString)
{
parsedValue.value = lexer.GetStringValue(t);
t = lexer.Scan();
}
else
{
return(false);
}
}
if (t == Token.Type.SeparatorSemicolon)
{
List <NameValueHeaderValue> result;
if (!TryParseParameters(lexer, out result, out t))
{
return(false);
}
parsedValue.parameters = result;
}
return(true);
}
static bool TryParseElement(Lexer lexer, out EntityTagHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
bool is_weak = false;
if (t == Token.Type.Token)
{
var s = lexer.GetStringValue(t);
if (s == "*")
{
parsedValue = any;
t = lexer.Scan();
return(true);
}
if (s != "W" || lexer.PeekChar() != '/')
{
return(false);
}
is_weak = true;
lexer.EatChar();
t = lexer.Scan();
}
if (t != Token.Type.QuotedString)
{
return(false);
}
parsedValue = new EntityTagHeaderValue();
parsedValue.Tag = lexer.GetStringValue(t);
parsedValue.IsWeak = is_weak;
t = lexer.Scan();
return(true);
}
static bool TryParseStringElement(Lexer lexer, out string parsedValue, out Token t)
{
t = lexer.Scan();
if (t == Token.Type.Token)
{
parsedValue = lexer.GetStringValue(t);
if (parsedValue.Length == 0)
{
parsedValue = null;
}
t = lexer.Scan();
}
else
{
parsedValue = null;
}
return(true);
}
public static bool TryParse(string input, out ContentDispositionHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
if (t.Kind != Token.Type.Token)
{
return(false);
}
List <NameValueHeaderValue> parameters = null;
var type = lexer.GetStringValue(t);
t = lexer.Scan();
switch (t.Kind)
{
case Token.Type.SeparatorSemicolon:
if (!NameValueHeaderValue.TryParseParameters(lexer, out parameters, out t) || t != Token.Type.End)
{
return(false);
}
break;
case Token.Type.End:
break;
default:
return(false);
}
parsedValue = new ContentDispositionHeaderValue()
{
dispositionType = type,
parameters = parameters
};
return(true);
}
static bool TryParseElement(Lexer lexer, out AuthenticationHeaderValue parsedValue, out Token t)
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
parsedValue = null;
return(false);
}
parsedValue = new AuthenticationHeaderValue();
parsedValue.Scheme = lexer.GetStringValue(t);
t = lexer.Scan();
if (t == Token.Type.Token)
{
// TODO: Wrong with multi value parsing
parsedValue.Parameter = lexer.GetRemainingStringValue(t.StartPosition);
t = new Token(Token.Type.End, 0, 0);
}
return(true);
}
public static bool TryParse (string input, out StringWithQualityHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var value = new StringWithQualityHeaderValue ();
value.Value = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t == Token.Type.SeparatorSemicolon) {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var s = lexer.GetStringValue (t);
if (s != "q" && s != "Q")
return false;
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual)
return false;
t = lexer.Scan ();
double d;
if (!lexer.TryGetDoubleValue (t, out d))
return false;
if (d > 1)
return false;
value.Quality = d;
t = lexer.Scan ();
}
if (t != Token.Type.End)
return false;
parsedValue = value;
return true;
}
public static bool TryParse(string input, out WarningHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
int code;
if (!lexer.TryGetNumericValue(t, out code) || !IsCodeValid(code))
{
return(false);
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var next = t;
if (lexer.PeekChar() == ':')
{
lexer.EatChar();
next = lexer.Scan();
if (next != Token.Type.Token)
{
return(false);
}
}
var value = new WarningHeaderValue();
value.Code = code;
value.Agent = lexer.GetStringValue(t, next);
t = lexer.Scan();
if (t != Token.Type.QuotedString)
{
return(false);
}
value.Text = lexer.GetStringValue(t);
t = lexer.Scan();
if (t == Token.Type.QuotedString)
{
DateTimeOffset date;
if (!lexer.TryGetDateValue(t, out date))
{
return(false);
}
value.Date = date;
t = lexer.Scan();
}
if (t != Token.Type.End)
{
return(false);
}
parsedValue = value;
return(true);
}
static bool TryParseElement (Lexer lexer, out ProductInfoHeaderValue parsedValue)
{
string comment;
parsedValue = null;
Token t;
if (lexer.ScanCommentOptional (out comment, out t)) {
if (comment == null)
return false;
parsedValue = new ProductInfoHeaderValue ();
parsedValue.Comment = comment;
return true;
}
if (t == Token.Type.End)
return true;
if (t != Token.Type.Token)
return false;
var value = new ProductHeaderValue ();
value.Name = lexer.GetStringValue (t);
var pos = lexer.Position;
t = lexer.Scan ();
if (t == Token.Type.SeparatorSlash) {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
value.Version = lexer.GetStringValue (t);
} else {
lexer.Position = pos;
}
parsedValue = new ProductInfoHeaderValue (value);
return true;
}
public static bool TryParse(string input, out ContentRangeHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var value = new ContentRangeHeaderValue();
value.unit = lexer.GetStringValue(t);
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
int nvalue;
if (!lexer.IsStarStringValue(t))
{
if (!lexer.TryGetNumericValue(t, out nvalue))
{
var s = lexer.GetStringValue(t);
if (s.Length < 3)
{
return(false);
}
var sep = s.Split('-');
if (sep.Length != 2)
{
return(false);
}
if (!int.TryParse(sep[0], NumberStyles.None, CultureInfo.InvariantCulture, out nvalue))
{
return(false);
}
value.From = nvalue;
if (!int.TryParse(sep[1], NumberStyles.None, CultureInfo.InvariantCulture, out nvalue))
{
return(false);
}
value.To = nvalue;
}
else
{
value.From = nvalue;
t = lexer.Scan();
if (t != Token.Type.SeparatorDash)
{
return(false);
}
t = lexer.Scan();
if (!lexer.TryGetNumericValue(t, out nvalue))
{
return(false);
}
value.To = nvalue;
}
}
t = lexer.Scan();
if (t != Token.Type.SeparatorSlash)
{
return(false);
}
t = lexer.Scan();
if (!lexer.IsStarStringValue(t))
{
if (!lexer.TryGetNumericValue(t, out nvalue))
{
return(false);
}
value.Length = nvalue;
}
t = lexer.Scan();
if (t != Token.Type.End)
{
return(false);
}
parsedValue = value;
return(true);
}
static bool TryParseElement (Lexer lexer, out TransferCodingWithQualityHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var result = new TransferCodingWithQualityHeaderValue ();
result.value = lexer.GetStringValue (t);
t = lexer.Scan ();
// Parameters parsing
if (t == Token.Type.SeparatorSemicolon && (!NameValueHeaderValue.TryParseParameters (lexer, out result.parameters, out t) || t != Token.Type.End))
return false;
parsedValue = result;
return true;
}
static bool TryParseElement (Lexer lexer, out StringWithQualityHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var value = new StringWithQualityHeaderValue ();
value.Value = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t == Token.Type.SeparatorSemicolon) {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var s = lexer.GetStringValue (t);
if (s != "q" && s != "Q")
return false;
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual)
return false;
t = lexer.Scan ();
double d;
if (!lexer.TryGetDoubleValue (t, out d))
return false;
if (d > 1)
return false;
value.Quality = d;
t = lexer.Scan ();
}
parsedValue = value;
return true;
}
static bool TryParseElement (Lexer lexer, out EntityTagHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
bool is_weak = false;
if (t == Token.Type.Token) {
var s = lexer.GetStringValue (t);
if (s == "*") {
parsedValue = any;
t = lexer.Scan ();
return true;
}
if (s != "W" || lexer.PeekChar () != '/')
return false;
is_weak = true;
lexer.EatChar ();
t = lexer.Scan ();
}
if (t != Token.Type.QuotedString)
return false;
parsedValue = new EntityTagHeaderValue ();
parsedValue.Tag = lexer.GetStringValue (t);
parsedValue.IsWeak = is_weak;
t = lexer.Scan ();
return true;
}
static bool TryParseElement (Lexer lexer, out NameValueHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
parsedValue = new NameValueHeaderValue () {
Name = lexer.GetStringValue (t),
};
t = lexer.Scan ();
if (t == Token.Type.SeparatorEqual) {
t = lexer.Scan ();
if (t == Token.Type.Token || t == Token.Type.QuotedString) {
parsedValue.value = lexer.GetStringValue (t);
t = lexer.Scan ();
} else {
return false;
}
}
return true;
}
static bool TryParseElement (Lexer lexer, out NameValueWithParametersHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
parsedValue = new NameValueWithParametersHeaderValue () {
Name = lexer.GetStringValue (t),
};
t = lexer.Scan ();
if (t == Token.Type.SeparatorEqual) {
t = lexer.Scan ();
if (t == Token.Type.Token || t == Token.Type.QuotedString) {
parsedValue.value = lexer.GetStringValue (t);
t = lexer.Scan ();
} else {
return false;
}
}
if (t == Token.Type.SeparatorSemicolon) {
List<NameValueHeaderValue> result;
if (!TryParseParameters (lexer, out result, out t))
return false;
parsedValue.parameters = result;
}
return true;
}
static bool TryParseElement (Lexer lexer, out ViaHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var next = lexer.Scan ();
ViaHeaderValue value = new ViaHeaderValue ();
if (next == Token.Type.SeparatorSlash) {
next = lexer.Scan ();
if (next != Token.Type.Token)
return false;
value.ProtocolName = lexer.GetStringValue (t);
value.ProtocolVersion = lexer.GetStringValue (next);
next = lexer.Scan ();
} else {
value.ProtocolVersion = lexer.GetStringValue (t);
}
if (next != Token.Type.Token)
return false;
if (lexer.PeekChar () == ':') {
lexer.EatChar ();
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
} else {
t = next;
}
value.ReceivedBy = lexer.GetStringValue (next, t);
string comment;
if (lexer.ScanCommentOptional (out comment, out t)) {
t = lexer.Scan ();
}
value.Comment = comment;
parsedValue = value;
return true;
}
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
parsedValue = null;
if (input == null)
{
return(true);
}
var value = new CacheControlHeaderValue();
var lexer = new Lexer(input);
Token t;
do
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
string s = lexer.GetStringValue(t);
bool token_read = false;
TimeSpan?ts;
switch (s)
{
case "no-store":
value.NoStore = true;
break;
case "no-transform":
value.NoTransform = true;
break;
case "only-if-cached":
value.OnlyIfCached = true;
break;
case "public":
value.Public = true;
break;
case "must-revalidate":
value.MustRevalidate = true;
break;
case "proxy-revalidate":
value.ProxyRevalidate = true;
break;
case "max-stale":
value.MaxStale = true;
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
token_read = true;
break;
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
ts = lexer.TryGetTimeSpanValue(t);
if (ts == null)
{
return(false);
}
value.MaxStaleLimit = ts;
break;
case "max-age":
case "s-maxage":
case "min-fresh":
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
return(false);
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
ts = lexer.TryGetTimeSpanValue(t);
if (ts == null)
{
return(false);
}
switch (s.Length)
{
case 7:
value.MaxAge = ts;
break;
case 8:
value.SharedMaxAge = ts;
break;
default:
value.MinFresh = ts;
break;
}
break;
case "private":
case "no-cache":
if (s.Length == 7)
{
value.Private = true;
}
else
{
value.NoCache = true;
}
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
token_read = true;
break;
}
t = lexer.Scan();
if (t != Token.Type.QuotedString)
{
return(false);
}
foreach (var entry in lexer.GetQuotedStringValue(t).Split(','))
{
var qs = entry.Trim('\t', ' ');
if (s.Length == 7)
{
value.PrivateHeaders.Add(qs);
}
else
{
value.NoCache = true;
value.NoCacheHeaders.Add(qs);
}
}
break;
default:
string name = lexer.GetStringValue(t);
string svalue = null;
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
switch (t.Kind)
{
case Token.Type.Token:
case Token.Type.QuotedString:
svalue = lexer.GetStringValue(t);
break;
default:
return(false);
}
}
else
{
token_read = true;
}
value.Extensions.Add(NameValueHeaderValue.Create(name, svalue));
break;
}
if (!token_read)
{
t = lexer.Scan();
}
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
{
return(false);
}
parsedValue = value;
return(true);
}
static bool TryParseElement(Lexer lexer, out ViaHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var next = lexer.Scan();
ViaHeaderValue value = new ViaHeaderValue();
if (next == Token.Type.SeparatorSlash)
{
next = lexer.Scan();
if (next != Token.Type.Token)
{
return(false);
}
value.ProtocolName = lexer.GetStringValue(t);
value.ProtocolVersion = lexer.GetStringValue(next);
next = lexer.Scan();
}
else
{
value.ProtocolVersion = lexer.GetStringValue(t);
}
if (next != Token.Type.Token)
{
return(false);
}
if (lexer.PeekChar() == ':')
{
lexer.EatChar();
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
}
else
{
t = next;
}
value.ReceivedBy = lexer.GetStringValue(next, t);
string comment;
if (lexer.ScanCommentOptional(out comment, out t))
{
t = lexer.Scan();
}
value.Comment = comment;
parsedValue = value;
return(true);
}
public static bool TryParse(string input, out RangeHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer(input);
var t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
var value = new RangeHeaderValue();
value.unit = lexer.GetStringValue(t);
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
return(false);
}
bool token_read;
do
{
int?from = null, to = null;
int number;
token_read = false;
t = lexer.Scan();
switch (t.Kind)
{
case Token.Type.SeparatorDash:
t = lexer.Scan();
if (!lexer.TryGetNumericValue(t, out number))
{
return(false);
}
to = number;
break;
case Token.Type.Token:
string s = lexer.GetStringValue(t);
var values = s.Split(new [] { '-' }, StringSplitOptions.RemoveEmptyEntries);
if (!int.TryParse(values[0], out number))
{
return(false);
}
switch (values.Length)
{
case 1:
t = lexer.Scan();
from = number;
switch (t.Kind)
{
case Token.Type.SeparatorDash:
t = lexer.Scan();
if (t != Token.Type.Token)
{
token_read = true;
break;
}
if (!lexer.TryGetNumericValue(t, out number))
{
return(false);
}
to = number;
if (to < from)
{
return(false);
}
break;
case Token.Type.End:
if (s.Length > 0 && s [s.Length - 1] != '-')
{
return(false);
}
token_read = true;
break;
case Token.Type.SeparatorComma:
token_read = true;
break;
default:
return(false);
}
break;
case 2:
from = number;
if (!int.TryParse(values[1], out number))
{
return(false);
}
to = number;
if (to < from)
{
return(false);
}
break;
default:
return(false);
}
break;
default:
return(false);
}
value.Ranges.Add(new RangeItemHeaderValue(from, to));
if (!token_read)
{
t = lexer.Scan();
}
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
{
return(false);
}
parsedValue = value;
return(true);
}
public static bool TryParse (string input, out WarningHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
int code;
if (!lexer.TryGetNumericValue (t, out code) || !IsCodeValid (code))
return false;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var next = t;
if (lexer.PeekChar () == ':') {
lexer.EatChar ();
next = lexer.Scan ();
if (next != Token.Type.Token)
return false;
}
var value = new WarningHeaderValue ();
value.Code = code;
value.Agent = lexer.GetStringValue (t, next);
t = lexer.Scan ();
if (t != Token.Type.QuotedString)
return false;
value.Text = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t == Token.Type.QuotedString) {
DateTimeOffset date;
if (!lexer.TryGetDateValue (t, out date))
return false;
value.Date = date;
t = lexer.Scan ();
}
if (t != Token.Type.End)
return false;
parsedValue = value;
return true;
}
public static bool TryParse (string input, out RangeConditionHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
bool is_weak;
if (t == Token.Type.Token) {
if (lexer.GetStringValue (t) != "W") {
DateTimeOffset date;
if (!Lexer.TryGetDateValue (input, out date))
return false;
parsedValue = new RangeConditionHeaderValue (date);
return true;
}
if (lexer.PeekChar () != '/')
return false;
is_weak = true;
lexer.EatChar ();
t = lexer.Scan ();
} else {
is_weak = false;
}
if (t != Token.Type.QuotedString)
return false;
if (lexer.Scan () != Token.Type.End)
return false;
parsedValue = new RangeConditionHeaderValue (
new EntityTagHeaderValue () {
Tag = lexer.GetStringValue (t),
IsWeak = is_weak
});
return true;
}
internal static bool TryParseParameters (Lexer lexer, out List<NameValueHeaderValue> result, out Token t)
{
var list = new List<NameValueHeaderValue> ();
result = null;
while (true) {
var attr = lexer.Scan ();
if (attr != Token.Type.Token) {
t = Token.Empty;
return false;
}
string value = null;
t = lexer.Scan ();
if (t == Token.Type.SeparatorEqual) {
t = lexer.Scan ();
if (t != Token.Type.Token && t != Token.Type.QuotedString)
return false;
value = lexer.GetStringValue (t);
t = lexer.Scan ();
}
list.Add (new NameValueHeaderValue () {
Name = lexer.GetStringValue (attr),
value = value
});
if (t == Token.Type.SeparatorSemicolon)
continue;
result = list;
return true;
}
}
internal static Token? TryParseMediaType (Lexer lexer, out string media)
{
media = null;
var token = lexer.Scan ();
if (token != Token.Type.Token)
return null;
if (lexer.Scan () != Token.Type.SeparatorSlash)
return null;
var token2 = lexer.Scan ();
if (token2 != Token.Type.Token)
return null;
media = lexer.GetStringValue (token) + "/" + lexer.GetStringValue (token2);
return lexer.Scan ();
}
static bool TryParseElement (Lexer lexer, out ProductHeaderValue parsedValue, out Token t)
{
parsedValue = null;
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
parsedValue = new ProductHeaderValue ();
parsedValue.Name = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t == Token.Type.SeparatorSlash) {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
parsedValue.Version = lexer.GetStringValue (t);
t = lexer.Scan ();
}
return true;
}
static bool TryParseCollection (Lexer lexer, out List<NameValueHeaderValue> result, Token.Type separator)
{
var list = new List<NameValueHeaderValue> ();
result = null;
Token t;
do {
var attr = lexer.Scan ();
if (attr != Token.Type.Token)
return false;
string value = null;
t = lexer.Scan ();
if (t == Token.Type.SeparatorEqual) {
t = lexer.Scan ();
if (t != Token.Type.Token && t != Token.Type.QuotedString)
return false;
value = lexer.GetStringValue (t);
t = lexer.Scan ();
}
if (t == separator|| t == Token.Type.End) {
list.Add (new NameValueHeaderValue () {
Name = lexer.GetStringValue (attr),
value = value
});
} else {
return false;
}
} while (t == separator);
result = list;
return true;
}
public static bool TryParse (string input, out ContentDispositionHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
if (t.Kind != Token.Type.Token)
return false;
List<NameValueHeaderValue> parameters = null;
var type = lexer.GetStringValue (t);
t = lexer.Scan ();
switch (t.Kind) {
case Token.Type.SeparatorSemicolon:
if (!NameValueHeaderValue.TryParseParameters (lexer, out parameters, out t) || t != Token.Type.End)
return false;
break;
case Token.Type.End:
break;
default:
return false;
}
parsedValue = new ContentDispositionHeaderValue () {
dispositionType = type,
parameters = parameters
};
return true;
}
public static bool TryParse (string input, out NameValueHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
if (t != Token.Type.Token && t != Token.Type.QuotedString)
return false;
string v = null;
var token2 = lexer.Scan ();
if (token2 != Token.Type.End) {
if (token2 != Token.Type.SeparatorEqual)
return false;
token2 = lexer.Scan ();
if (token2 == Token.Type.Token || token2 == Token.Type.QuotedString) {
v = lexer.GetStringValue (token2);
token2 = lexer.Scan ();
}
if (token2 != Token.Type.End)
return false;
}
parsedValue = new NameValueHeaderValue () {
Name = lexer.GetStringValue (t),
value = v
};
return true;
}
public static bool TryParse (string input, out ContentRangeHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var value = new ContentRangeHeaderValue ();
value.unit = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
int nvalue;
if (!lexer.IsStarStringValue (t)) {
if (!lexer.TryGetNumericValue (t, out nvalue)) {
var s = lexer.GetStringValue (t);
if (s.Length < 3)
return false;
var sep = s.Split ('-');
if (sep.Length != 2)
return false;
if (!int.TryParse (sep[0], NumberStyles.None, CultureInfo.InvariantCulture, out nvalue))
return false;
value.From = nvalue;
if (!int.TryParse (sep[1], NumberStyles.None, CultureInfo.InvariantCulture, out nvalue))
return false;
value.To = nvalue;
} else {
value.From = nvalue;
t = lexer.Scan (recognizeDash: true);
if (t != Token.Type.SeparatorDash)
return false;
t = lexer.Scan ();
if (!lexer.TryGetNumericValue (t, out nvalue))
return false;
value.To = nvalue;
}
}
t = lexer.Scan ();
if (t != Token.Type.SeparatorSlash)
return false;
t = lexer.Scan ();
if (!lexer.IsStarStringValue (t)) {
long lvalue;
if (!lexer.TryGetNumericValue (t, out lvalue))
return false;
value.Length = lvalue;
}
t = lexer.Scan ();
if (t != Token.Type.End)
return false;
parsedValue = value;
return true;
}
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
parsedValue = null;
if (input == null)
return true;
var value = new CacheControlHeaderValue ();
var lexer = new Lexer (input);
Token t;
do {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
string s = lexer.GetStringValue (t);
bool token_read = false;
TimeSpan? ts;
switch (s) {
case "no-store":
value.NoStore = true;
break;
case "no-transform":
value.NoTransform = true;
break;
case "only-if-cached":
value.OnlyIfCached = true;
break;
case "public":
value.Public = true;
break;
case "must-revalidate":
value.MustRevalidate = true;
break;
case "proxy-revalidate":
value.ProxyRevalidate = true;
break;
case "max-stale":
value.MaxStale = true;
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual) {
token_read = true;
break;
}
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
ts = lexer.TryGetTimeSpanValue (t);
if (ts == null)
return false;
value.MaxStaleLimit = ts;
break;
case "max-age":
case "s-maxage":
case "min-fresh":
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual) {
return false;
}
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
ts = lexer.TryGetTimeSpanValue (t);
if (ts == null)
return false;
switch (s.Length) {
case 7:
value.MaxAge = ts;
break;
case 8:
value.SharedMaxAge = ts;
break;
default:
value.MinFresh = ts;
break;
}
break;
case "private":
case "no-cache":
if (s.Length == 7) {
value.Private = true;
} else {
value.NoCache = true;
}
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual) {
token_read = true;
break;
}
t = lexer.Scan ();
if (t != Token.Type.QuotedString)
return false;
foreach (var entry in lexer.GetQuotedStringValue (t).Split (',')) {
var qs = entry.Trim ('\t', ' ');
if (s.Length == 7) {
value.PrivateHeaders.Add (qs);
} else {
value.NoCache = true;
value.NoCacheHeaders.Add (qs);
}
}
break;
default:
string name = lexer.GetStringValue (t);
string svalue = null;
t = lexer.Scan ();
if (t == Token.Type.SeparatorEqual) {
t = lexer.Scan ();
switch (t.Kind) {
case Token.Type.Token:
case Token.Type.QuotedString:
svalue = lexer.GetStringValue (t);
break;
default:
return false;
}
} else {
token_read = true;
}
value.Extensions.Add (NameValueHeaderValue.Create (name, svalue));
break;
}
if (!token_read)
t = lexer.Scan ();
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
return false;
parsedValue = value;
return true;
}
public static bool TryParse (string input, out RangeHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
var value = new RangeHeaderValue ();
value.unit = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual)
return false;
bool token_read;
do {
int? from = null, to = null;
int number;
token_read = false;
t = lexer.Scan ();
switch (t.Kind) {
case Token.Type.SeparatorDash:
t = lexer.Scan ();
if (!lexer.TryGetNumericValue (t, out number))
return false;
to = number;
break;
case Token.Type.Token:
string s = lexer.GetStringValue (t);
var values = s.Split (new [] { '-' }, StringSplitOptions.RemoveEmptyEntries);
if (!int.TryParse (values[0], out number))
return false;
switch (values.Length) {
case 1:
t = lexer.Scan ();
switch (t.Kind) {
case Token.Type.SeparatorDash:
from = number;
t = lexer.Scan ();
if (t != Token.Type.Token) {
token_read = true;
break;
}
if (!lexer.TryGetNumericValue (t, out number))
return false;
to = number;
if (to < from)
return false;
break;
default:
return false;
}
break;
case 2:
from = number;
if (!int.TryParse (values[1], out number))
return false;
to = number;
if (to < from)
return false;
break;
default:
return false;
}
break;
default:
return false;
}
value.Ranges.Add (new RangeItemHeaderValue (from, to));
if (!token_read)
t = lexer.Scan ();
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
return false;
parsedValue = value;
return true;
}
static bool TryParseElement (Lexer lexer, out AuthenticationHeaderValue parsedValue, out Token t)
{
t = lexer.Scan ();
if (t != Token.Type.Token) {
parsedValue = null;
return false;
}
parsedValue = new AuthenticationHeaderValue ();
parsedValue.Scheme = lexer.GetStringValue (t);
t = lexer.Scan ();
if (t == Token.Type.Token) {
// TODO: Wrong with multi value parsing
parsedValue.Parameter = lexer.GetRemainingStringValue (t.StartPosition);
t = new Token (Token.Type.End, 0, 0);
}
return true;
}