public string GetLeftPart(UriPartial part)
{
switch (part)
{
case UriPartial.Scheme:
return(this.scheme + this.GetOpaqueWiseSchemeDelimiter());
case UriPartial.Authority:
{
if (this.host == string.Empty || this.scheme == Uri.UriSchemeMailto || this.scheme == Uri.UriSchemeNews)
{
return(string.Empty);
}
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(this.scheme);
stringBuilder.Append(this.GetOpaqueWiseSchemeDelimiter());
if (this.path.Length > 1 && this.path[1] == ':' && Uri.UriSchemeFile == this.scheme)
{
stringBuilder.Append('/');
}
if (this.userinfo.Length > 0)
{
stringBuilder.Append(this.userinfo).Append('@');
}
stringBuilder.Append(this.host);
int defaultPort = Uri.GetDefaultPort(this.scheme);
if (this.port != -1 && this.port != defaultPort)
{
stringBuilder.Append(':').Append(this.port);
}
return(stringBuilder.ToString());
}
case UriPartial.Path:
{
StringBuilder stringBuilder2 = new StringBuilder();
stringBuilder2.Append(this.scheme);
stringBuilder2.Append(this.GetOpaqueWiseSchemeDelimiter());
if (this.path.Length > 1 && this.path[1] == ':' && Uri.UriSchemeFile == this.scheme)
{
stringBuilder2.Append('/');
}
if (this.userinfo.Length > 0)
{
stringBuilder2.Append(this.userinfo).Append('@');
}
stringBuilder2.Append(this.host);
int defaultPort = Uri.GetDefaultPort(this.scheme);
if (this.port != -1 && this.port != defaultPort)
{
stringBuilder2.Append(':').Append(this.port);
}
stringBuilder2.Append(this.path);
return(stringBuilder2.ToString());
}
default:
return(null);
}
}
private void Parse(string uriString)
{
if (uriString == null)
{
throw new ArgumentNullException("uriString");
}
int length = uriString.Length;
if (length <= 1)
{
throw new FormatException();
}
int num = uriString.IndexOf(':');
if (num < 0)
{
if (uriString[0] == '/')
{
this.ParseAsUnixAbsoluteFilePath(uriString);
}
else
{
if (!uriString.StartsWith("\\\\"))
{
throw new FormatException("URI scheme was not recognized, nor input string is not recognized as an absolute file path.");
}
this.ParseAsWindowsUNC(uriString);
}
return;
}
if (num == 1)
{
if (!char.IsLetter(uriString[0]))
{
throw new FormatException("URI scheme must start with alphabet character.");
}
this.ParseAsWindowsAbsoluteFilePath(uriString);
return;
}
else
{
this.scheme = uriString.Substring(0, num).ToLower(CultureInfo.InvariantCulture);
if (!char.IsLetter(this.scheme[0]))
{
throw new FormatException("URI scheme must start with alphabet character.");
}
for (int i = 1; i < this.scheme.Length; i++)
{
if (!char.IsLetterOrDigit(this.scheme, i))
{
switch (this.scheme[i])
{
case '+':
case '-':
case '.':
goto IL_132;
}
throw new FormatException("URI scheme must consist of one of alphabet, digits, '+', '-' or '.' character.");
}
IL_132 :;
}
uriString = uriString.Substring(num + 1);
num = uriString.IndexOf('#');
if (!this.IsUnc && num != -1)
{
this.fragment = uriString.Substring(num);
uriString = uriString.Substring(0, num);
}
num = uriString.IndexOf('?');
if (num != -1)
{
this.query = uriString.Substring(num);
uriString = uriString.Substring(0, num);
if (!this.userEscaped)
{
this.query = Uri.EscapeString(this.query);
}
}
bool flag = this.scheme == Uri.UriSchemeFile && uriString.StartsWith("///");
if (uriString.StartsWith("//"))
{
if (uriString.StartsWith("////"))
{
flag = false;
}
uriString = uriString.TrimStart(new char[]
{
'/'
});
if (uriString.Length > 1 && uriString[1] == ':')
{
flag = false;
}
}
else if (!Uri.IsPredefinedScheme(this.scheme))
{
this.path = uriString;
this.isOpaquePart = true;
return;
}
num = uriString.IndexOfAny(new char[]
{
'/'
});
if (flag)
{
num = -1;
}
if (num == -1)
{
if (this.scheme != Uri.UriSchemeMailto && this.scheme != Uri.UriSchemeNews && this.scheme != Uri.UriSchemeFile)
{
this.path = "/";
}
}
else
{
this.path = uriString.Substring(num);
uriString = uriString.Substring(0, num);
}
num = uriString.IndexOf("@");
if (num != -1)
{
this.userinfo = uriString.Substring(0, num);
uriString = uriString.Remove(0, num + 1);
}
this.port = -1;
num = uriString.LastIndexOf(":");
if (flag)
{
num = -1;
}
if (num != -1 && num != uriString.Length - 1)
{
string text = uriString.Remove(0, num + 1);
if (text.Length > 1 && text[text.Length - 1] != ']')
{
try
{
this.port = (int)uint.Parse(text, CultureInfo.InvariantCulture);
uriString = uriString.Substring(0, num);
}
catch (Exception)
{
throw new FormatException("Invalid URI: invalid port number");
}
}
}
if (this.port == -1)
{
this.port = Uri.GetDefaultPort(this.scheme);
}
this.host = uriString;
if (flag)
{
this.path = '/' + uriString;
this.host = string.Empty;
}
else if (this.host.Length == 2 && this.host[1] == ':')
{
this.path = this.host + this.path;
this.host = string.Empty;
}
else if (this.isUnixFilePath)
{
uriString = "//" + uriString;
this.host = string.Empty;
}
else
{
if (this.host.Length == 0)
{
throw new FormatException("Invalid URI: The hostname could not be parsed");
}
if (this.scheme == Uri.UriSchemeFile)
{
this.isUnc = true;
}
}
if (this.scheme != Uri.UriSchemeMailto && this.scheme != Uri.UriSchemeNews && this.scheme != Uri.UriSchemeFile && this.reduce)
{
this.path = Uri.Reduce(this.path);
}
return;
}
}
