private ParsedExpression Parse(ProxyContext context, string expression)
{
logger.LogDebug("Parsing an expression: {0}", expression);
var instructions = new List <dynamic>();
int index = 0;
int len = expression.Length;
var routeVariables = context.Settings.VariableTrie;
var sb = new StringBuilder(expression.Length);
void ProcessLastSegment()
{
if (sb.Length == 0)
{
return;
}
instructions.Add(sb.ToString());
sb.Clear();
}
while (index < len)
{
var c = expression[index++];
if (c != '$')
{
sb.Append(c);
continue;
}
int varNameStartIndex = index;
while (index < len)
{
if (!PatternVariables.IsValidVariableChar(expression[index], isFirstChar: varNameStartIndex == index))
{
break;
}
index++;
}
if (varNameStartIndex == index)
{
sb.AppendDollar();
continue;
}
// Is it a system variable?
var varName = expression[varNameStartIndex..index];
public void IsValidVariableChar_AllValidChars_Success()
{
var name = "abcdefghijklmnopqrstvuwxyzABCDEFGHIJKLMNOPQRSTVUWXYZ0123456789_";
name.All(c => PatternVariables.IsValidVariableChar(c, false)).Should().BeTrue();
}
