/// <summary>
/// Provides the path string escaped in a way which is correct for combining into the URI representation.
/// </summary>
/// <returns>The escaped path value</returns>
public string ToUriComponent()
{
if (!HasValue)
{
return(string.Empty);
}
var value = _value;
var i = 0;
for (; i < value.Length; i++)
{
if (!PathStringHelper.IsValidPathChar(value[i]) || PathStringHelper.IsPercentEncodedChar(value, i))
{
break;
}
}
if (i < value.Length)
{
return(ToEscapedUriComponent(value, i));
}
return(value);
}
private static string ToEscapedUriComponent(string value, int i)
{
StringBuilder buffer = null;
var start = 0;
var count = i;
var requiresEscaping = false;
while (i < value.Length)
{
var isPercentEncodedChar = PathStringHelper.IsPercentEncodedChar(value, i);
if (PathStringHelper.IsValidPathChar(value[i]) || isPercentEncodedChar)
{
if (requiresEscaping)
{
// the current segment requires escape
if (buffer == null)
{
buffer = new StringBuilder(value.Length * 3);
}
buffer.Append(Uri.EscapeDataString(value.Substring(start, count)));
requiresEscaping = false;
start = i;
count = 0;
}
if (isPercentEncodedChar)
{
count += 3;
i += 3;
}
else
{
count++;
i++;
}
}
else
{
if (!requiresEscaping)
{
// the current segment doesn't require escape
if (buffer == null)
{
buffer = new StringBuilder(value.Length * 3);
}
buffer.Append(value, start, count);
requiresEscaping = true;
start = i;
count = 0;
}
count++;
i++;
}
}
if (count == value.Length && !requiresEscaping)
{
return(value);
}
else
{
if (count > 0)
{
if (buffer == null)
{
buffer = new StringBuilder(value.Length * 3);
}
if (requiresEscaping)
{
buffer.Append(Uri.EscapeDataString(value.Substring(start, count)));
}
else
{
buffer.Append(value, start, count);
}
}
return(buffer.ToString());
}
}