private static Exception ValidateUriSegment(List <PathSubsegment> pathSubsegments, HashSet <string> usedParameterNames)
{
bool segmentContainsCatchAll = false;
Type previousSegmentType = null;
foreach (PathSubsegment subsegment in pathSubsegments)
{
if (previousSegmentType != null)
{
if (previousSegmentType == subsegment.GetType())
{
return(Error.Argument("routeTemplate", ErrorResources.Route_CannotHaveConsecutiveParameters));
}
}
previousSegmentType = subsegment.GetType();
PathLiteralSubsegment literalSubsegment = subsegment as PathLiteralSubsegment;
if (literalSubsegment != null)
{
// Nothing to validate for literals - everything is valid
}
else
{
PathParameterSubsegment parameterSubsegment = subsegment as PathParameterSubsegment;
if (parameterSubsegment != null)
{
string parameterName = parameterSubsegment.ParameterName;
if (parameterSubsegment.IsCatchAll)
{
segmentContainsCatchAll = true;
}
// Check for valid characters in the parameter name
if (!IsValidParameterName(parameterName))
{
return(Error.Argument("routeTemplate", ErrorResources.Route_InvalidParameterName, parameterName));
}
if (usedParameterNames.Contains(parameterName))
{
return(Error.Argument("routeTemplate", ErrorResources.Route_RepeatedParameter, parameterName));
}
else
{
usedParameterNames.Add(parameterName);
}
}
else
{
Contract.Assert(false, "Invalid path subsegment type");
}
}
}
if (segmentContainsCatchAll && (pathSubsegments.Count != 1))
{
return(Error.Argument("routeTemplate", ErrorResources.Route_CannotHaveCatchAllInMultiSegment));
}
return(null);
}
private static bool MatchContentPathSegment(PathContentSegment routeSegment, string requestPathSegment, HttpRouteValueDictionary defaultValues, HttpRouteValueDictionary matchedValues)
{
if (string.IsNullOrEmpty(requestPathSegment))
{
if (routeSegment.Subsegments.Count <= 1)
{
object obj2;
PathParameterSubsegment subsegment3 = routeSegment.Subsegments[0] as PathParameterSubsegment;
if (subsegment3 == null)
{
return(false);
}
if (defaultValues.TryGetValue(subsegment3.ParameterName, out obj2))
{
matchedValues.Add(subsegment3.ParameterName, obj2);
return(true);
}
}
return(false);
}
if (routeSegment.Subsegments.Count == 1)
{
return(MatchSingleContentPathSegment(routeSegment.Subsegments[0], requestPathSegment, matchedValues));
}
int length = requestPathSegment.Length;
int num2 = routeSegment.Subsegments.Count - 1;
PathParameterSubsegment subsegment = null;
PathLiteralSubsegment subsegment2 = null;
while (num2 >= 0)
{
int num3 = length;
PathParameterSubsegment subsegment4 = routeSegment.Subsegments[num2] as PathParameterSubsegment;
if (subsegment4 != null)
{
subsegment = subsegment4;
}
else
{
PathLiteralSubsegment subsegment5 = routeSegment.Subsegments[num2] as PathLiteralSubsegment;
if (subsegment5 != null)
{
subsegment2 = subsegment5;
int startIndex = length - 1;
if (subsegment != null)
{
startIndex--;
}
if (startIndex < 0)
{
return(false);
}
int num5 = requestPathSegment.LastIndexOf(subsegment5.Literal, startIndex, StringComparison.OrdinalIgnoreCase);
if (num5 == -1)
{
return(false);
}
if ((num2 == (routeSegment.Subsegments.Count - 1)) && ((num5 + subsegment5.Literal.Length) != requestPathSegment.Length))
{
return(false);
}
num3 = num5;
}
}
if ((subsegment != null) && (((subsegment2 != null) && (subsegment4 == null)) || (num2 == 0)))
{
int num6;
int num7;
if (subsegment2 == null)
{
if (num2 == 0)
{
num6 = 0;
}
else
{
num6 = num3;
}
num7 = length;
}
else if ((num2 == 0) && (subsegment4 != null))
{
num6 = 0;
num7 = length;
}
else
{
num6 = num3 + subsegment2.Literal.Length;
num7 = length - num6;
}
string str = requestPathSegment.Substring(num6, num7);
if (string.IsNullOrEmpty(str))
{
return(false);
}
matchedValues.Add(subsegment.ParameterName, str);
subsegment = null;
subsegment2 = null;
}
length = num3;
num2--;
}
if (length != 0)
{
return(routeSegment.Subsegments[0] is PathParameterSubsegment);
}
return(true);
}
