// name=value; expires=Sun, 06 Nov 1994 08:49:37 GMT; max-age=86400; domain=domain1; path=path1; secure; samesite={Strict|Lax|None}; httponly
private static int GetSetCookieLength(StringSegment input, int startIndex, out SetCookieHeaderValue parsedValue)
{
Contract.Requires(startIndex >= 0);
var offset = startIndex;
parsedValue = null;
if (StringSegment.IsNullOrEmpty(input) || (offset >= input.Length))
{
return(0);
}
var result = new SetCookieHeaderValue();
// The caller should have already consumed any leading whitespace, commas, etc..
// Name=value;
// Name
var itemLength = HttpRuleParser.GetTokenLength(input, offset);
if (itemLength == 0)
{
return(0);
}
result._name = input.Subsegment(offset, itemLength);
offset += itemLength;
// = (no spaces)
if (!ReadEqualsSign(input, ref offset))
{
return(0);
}
// value or "quoted value"
// The value may be empty
result._value = CookieHeaderValue.GetCookieValue(input, ref offset);
// *(';' SP cookie-av)
while (offset < input.Length)
{
if (input[offset] == ',')
{
// Divider between headers
break;
}
if (input[offset] != ';')
{
// Expecting a ';' between parameters
return(0);
}
offset++;
offset += HttpRuleParser.GetWhitespaceLength(input, offset);
// cookie-av = expires-av / max-age-av / domain-av / path-av / secure-av / samesite-av / httponly-av / extension-av
itemLength = HttpRuleParser.GetTokenLength(input, offset);
if (itemLength == 0)
{
// Trailing ';' or leading into garbage. Let the next parser fail.
break;
}
var token = input.Subsegment(offset, itemLength);
offset += itemLength;
// expires-av = "Expires=" sane-cookie-date
if (StringSegment.Equals(token, ExpiresToken, StringComparison.OrdinalIgnoreCase))
{
// = (no spaces)
if (!ReadEqualsSign(input, ref offset))
{
return(0);
}
var dateString = ReadToSemicolonOrEnd(input, ref offset);
DateTimeOffset expirationDate;
if (!HttpRuleParser.TryStringToDate(dateString, out expirationDate))
{
// Invalid expiration date, abort
return(0);
}
result.Expires = expirationDate;
}
// max-age-av = "Max-Age=" non-zero-digit *DIGIT
else if (StringSegment.Equals(token, MaxAgeToken, StringComparison.OrdinalIgnoreCase))
{
// = (no spaces)
if (!ReadEqualsSign(input, ref offset))
{
return(0);
}
itemLength = HttpRuleParser.GetNumberLength(input, offset, allowDecimal: false);
if (itemLength == 0)
{
return(0);
}
var numberString = input.Subsegment(offset, itemLength);
long maxAge;
if (!HeaderUtilities.TryParseNonNegativeInt64(numberString, out maxAge))
{
// Invalid expiration date, abort
return(0);
}
result.MaxAge = TimeSpan.FromSeconds(maxAge);
offset += itemLength;
}
// domain-av = "Domain=" domain-value
// domain-value = <subdomain> ; defined in [RFC1034], Section 3.5, as enhanced by [RFC1123], Section 2.1
else if (StringSegment.Equals(token, DomainToken, StringComparison.OrdinalIgnoreCase))
{
// = (no spaces)
if (!ReadEqualsSign(input, ref offset))
{
return(0);
}
// We don't do any detailed validation on the domain.
result.Domain = ReadToSemicolonOrEnd(input, ref offset);
}
// path-av = "Path=" path-value
// path-value = <any CHAR except CTLs or ";">
else if (StringSegment.Equals(token, PathToken, StringComparison.OrdinalIgnoreCase))
{
// = (no spaces)
if (!ReadEqualsSign(input, ref offset))
{
return(0);
}
// We don't do any detailed validation on the path.
result.Path = ReadToSemicolonOrEnd(input, ref offset);
}
// secure-av = "Secure"
else if (StringSegment.Equals(token, SecureToken, StringComparison.OrdinalIgnoreCase))
{
result.Secure = true;
}
// samesite-av = "SameSite=" samesite-value
// samesite-value = "Strict" / "Lax" / "None"
else if (StringSegment.Equals(token, SameSiteToken, StringComparison.OrdinalIgnoreCase))
{
if (!ReadEqualsSign(input, ref offset))
{
result.SameSite = SuppressSameSiteNone ? SameSiteMode.Strict : SameSiteMode.Unspecified;
}
else
{
var enforcementMode = ReadToSemicolonOrEnd(input, ref offset);
if (StringSegment.Equals(enforcementMode, SameSiteStrictToken, StringComparison.OrdinalIgnoreCase))
{
result.SameSite = SameSiteMode.Strict;
}
else if (StringSegment.Equals(enforcementMode, SameSiteLaxToken, StringComparison.OrdinalIgnoreCase))
{
result.SameSite = SameSiteMode.Lax;
}
else if (!SuppressSameSiteNone &&
StringSegment.Equals(enforcementMode, SameSiteNoneToken, StringComparison.OrdinalIgnoreCase))
{
result.SameSite = SameSiteMode.None;
}
else
{
result.SameSite = SuppressSameSiteNone ? SameSiteMode.Strict : SameSiteMode.Unspecified;
}
}
}
// httponly-av = "HttpOnly"
else if (StringSegment.Equals(token, HttpOnlyToken, StringComparison.OrdinalIgnoreCase))
{
result.HttpOnly = true;
}
// extension-av = <any CHAR except CTLs or ";">
else
{
// TODO: skiping it for now to avoid parsing failure? Store it in a list?
// = (no spaces)
if (!ReadEqualsSign(input, ref offset))
{
return(0);
}
ReadToSemicolonOrEnd(input, ref offset);
}
}
parsedValue = result;
return(offset - startIndex);
}
public static bool TryParse(StringSegment input, out SetCookieHeaderValue parsedValue)
{
var index = 0;
return(SingleValueParser.TryParseValue(input, ref index, out parsedValue));
}