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 TryParse(string input, int minimalCount, out List <ProductInfoHeaderValue> result)
{
var list = new List <ProductInfoHeaderValue> ();
var lexer = new Lexer(input);
result = null;
while (true)
{
ProductInfoHeaderValue element;
if (!TryParseElement(lexer, out element))
{
return(false);
}
if (element == null)
{
if (list != null && minimalCount <= list.Count)
{
result = list;
return(true);
}
return(false);
}
list.Add(element);
// Separator parsing
switch (lexer.PeekChar())
{
case ' ':
case '\t':
lexer.EatChar();
continue;
case -1:
if (minimalCount <= list.Count)
{
result = list;
return(true);
}
break;
}
return(false);
}
}
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);
}
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;
}
internal static bool TryParse (string input, int minimalCount, out List<ProductInfoHeaderValue> result)
{
var list = new List<ProductInfoHeaderValue> ();
var lexer = new Lexer (input);
result = null;
while (true) {
ProductInfoHeaderValue element;
if (!TryParseElement (lexer, out element))
return false;
if (element == null) {
if (list != null && minimalCount <= list.Count) {
result = list;
return true;
}
return false;
}
list.Add (element);
// Separator parsing
switch (lexer.PeekChar ()) {
case ' ':
case '\t':
lexer.EatChar ();
continue;
case -1:
if (minimalCount <= list.Count) {
result = list;
return true;
}
break;
}
return false;
}
}
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;
}
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;
}
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;
}
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);
}