// port = *DIGIT
private static bool ParsePort(ParserState state)
{
string part = state.remaining;
if (part.Length == 0 || part[0] != ':')
{
return(part.Length > 0);
}
StringBuilder sb = new StringBuilder();
int index;
for (index = 1; index < part.Length; index++)
{
char ch = part[index];
if (!CharUtilities.IsDigit(ch))
{
if (ch == '/' || ch == '#' || ch == '?')
{
break;
}
state.error = "Invalid URI: Invalid port specified.";
return(false);
}
sb.Append(ch);
}
if (index <= part.Length)
{
state.remaining = part.Substring(index);
}
if (sb.Length == 0)
{
return(state.remaining.Length > 0);
}
int port;
try
{
port = Int32.Parse(sb.ToString());
}
catch (Exception)
{
state.error = "Invalid URI: Invalid port number";
return(false);
}
if (port < 0 || port > UInt16.MaxValue)
{
state.error = "Invalid URI: Invalid port number";
return(false);
}
state.elements.port = port;
return(state.remaining.Length > 0);
}
// 3.1) scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
private static bool ParseScheme(ParserState state)
{
string part = state.remaining;
StringBuilder sb = new StringBuilder();
sb.Append(part[0]);
int index;
for (index = 1; index < part.Length; index++)
{
char ch = part[index];
if (ch != '.' && ch != '-' && ch != '+' && !IsAlpha(ch) && !CharUtilities.IsDigit(ch))
{
break;
}
sb.Append(ch);
}
if (index == 0 || index >= part.Length)
{
if (state.kind == UriKind.Absolute)
{
state.error = "Invalid URI: The format of the URI could not be determined.";
return(false);
}
state.elements.isAbsoluteUri = false;
return(state.remaining.Length > 0);
}
if (part[index] != ':')
{
if (state.kind == UriKind.Absolute)
{
state.error = "Invalid URI: The URI scheme is not valid.";
return(false);
}
state.elements.isAbsoluteUri = false;
return(state.remaining.Length > 0);
}
state.elements.scheme = sb.ToString().ToLower();
state.remaining = part.Substring(index);
// Check scheme name characters as specified in RFC2396.
// Note: different checks in 1.x and 2.0
if (!Uri.CheckSchemeName(state.elements.scheme))
{
if (state.kind == UriKind.Absolute)
{
state.error = "Invalid URI: The URI scheme is not valid.";
return(false);
}
state.elements.isAbsoluteUri = false;
return(state.remaining.Length > 0);
}
return(ParseDelimiter(state));
}