public static bool TryParseComponents(string uri, UriKind kind, out UriElements elements, out string error)
{
uri = uri.Trim();
ParserState state = new ParserState(uri, kind);
elements = state.elements;
error = null;
if (uri.Length == 0 && (kind == UriKind.Relative || kind == UriKind.RelativeOrAbsolute))
{
state.elements.isAbsoluteUri = false;
return true;
}
if (uri.Length <= 1 && kind == UriKind.Absolute)
{
error = "Absolute URI is too short";
return false;
}
bool ok = ParseFilePath(state) &&
ParseScheme(state);
var scheme = state.elements.scheme;
UriParser parser = null;
if (!StringUtilities.IsNullOrEmpty(scheme))
{
parser = UriParser.GetParser(scheme);
if (parser != null && !(parser is DefaultUriParser))
return true;
}
ok = ok &&
ParseAuthority(state) &&
ParsePath(state) &&
ParseQuery(state) &&
ParseFragment(state);
if (StringUtilities.IsNullOrEmpty(state.elements.host) &&
(scheme == Uri.UriSchemeHttp || scheme == Uri.UriSchemeGopher || scheme == Uri.UriSchemeNntp ||
scheme == Uri.UriSchemeHttps || scheme == Uri.UriSchemeFtp))
state.error = "Invalid URI: The Authority/Host could not be parsed.";
if (!StringUtilities.IsNullOrEmpty(state.elements.host) &&
Uri.CheckHostName(state.elements.host) == UriHostNameType.Unknown)
state.error = "Invalid URI: The hostname could not be parsed.";
if (!StringUtilities.IsNullOrEmpty(state.error))
{
elements = null;
error = state.error;
return false;
}
return true;
}
public ParserState(string uri, UriKind kind)
{
remaining = uri;
this.kind = kind;
elements = new UriElements();
}
