private static bool ForEachParameter(IList <PathSegment> pathSegments, Func <ParameterSubsegment, bool> action)
{
for (int i = 0; i < pathSegments.Count; i++)
{
PathSegment segment = pathSegments[i];
if (!(segment is SeparatorPathSegment))
{
ContentPathSegment segment2 = segment as ContentPathSegment;
if (segment2 != null)
{
foreach (PathSubsegment subsegment in segment2.Subsegments)
{
if (!(subsegment is LiteralSubsegment))
{
ParameterSubsegment arg = subsegment as ParameterSubsegment;
if ((arg != null) && !action(arg))
{
return(false);
}
}
}
}
}
}
return(true);
}
private static bool IsParameterRequired(ParameterSubsegment parameterSubsegment, RouteValueDictionary defaultValues, out object defaultValue)
{
if (parameterSubsegment.IsCatchAll)
{
defaultValue = null;
return(false);
}
return(!defaultValues.TryGetValue(parameterSubsegment.ParameterName, out defaultValue));
}
private static ParameterSubsegment GetParameterSubsegment(IList <PathSegment> pathSegments, string parameterName)
{
ParameterSubsegment foundParameterSubsegment = null;
ForEachParameter(pathSegments, delegate(ParameterSubsegment parameterSubsegment) {
if (string.Equals(parameterName, parameterSubsegment.ParameterName, StringComparison.OrdinalIgnoreCase))
{
foundParameterSubsegment = parameterSubsegment;
return(false);
}
return(true);
});
return(foundParameterSubsegment);
}
private static bool ForEachParameter(IList <PathSegment> pathSegments, Func <ParameterSubsegment, bool> action)
{
for (int i = 0; i < pathSegments.Count; i++)
{
PathSegment pathSegment = pathSegments[i];
if (pathSegment is SeparatorPathSegment)
{
// We only care about parameter subsegments, so skip this
continue;
}
else
{
ContentPathSegment contentPathSegment = pathSegment as ContentPathSegment;
if (contentPathSegment != null)
{
foreach (PathSubsegment subsegment in contentPathSegment.Subsegments)
{
LiteralSubsegment literalSubsegment = subsegment as LiteralSubsegment;
if (literalSubsegment != null)
{
// We only care about parameter subsegments, so skip this
continue;
}
else
{
ParameterSubsegment parameterSubsegment = subsegment as ParameterSubsegment;
if (parameterSubsegment != null)
{
if (!action(parameterSubsegment))
{
return(false);
}
}
else
{
Debug.Fail("Invalid path subsegment type");
}
}
}
}
else
{
Debug.Fail("Invalid path segment type");
}
}
}
return(true);
}
private void MatchCatchAll(ContentPathSegment contentPathSegment, IEnumerable <string> remainingRequestSegments, RouteValueDictionary defaultValues, RouteValueDictionary matchedValues)
{
object obj2;
string str = string.Join(string.Empty, remainingRequestSegments.ToArray <string>());
ParameterSubsegment subsegment = contentPathSegment.Subsegments[0] as ParameterSubsegment;
if (str.Length > 0)
{
obj2 = str;
}
else
{
defaultValues.TryGetValue(subsegment.ParameterName, out obj2);
}
matchedValues.Add(subsegment.ParameterName, obj2);
}
private void MatchCatchAll(ContentPathSegment contentPathSegment, IEnumerable <string> remainingRequestSegments, RouteValueDictionary defaultValues, RouteValueDictionary matchedValues)
{
string remainingRequest = String.Join(String.Empty, remainingRequestSegments.ToArray());
ParameterSubsegment catchAllSegment = contentPathSegment.Subsegments[0] as ParameterSubsegment;
object catchAllValue;
if (remainingRequest.Length > 0)
{
catchAllValue = remainingRequest;
}
else
{
defaultValues.TryGetValue(catchAllSegment.ParameterName, out catchAllValue);
}
matchedValues.Add(catchAllSegment.ParameterName, catchAllValue);
}
private static Exception ValidateUrlSegment(IList <PathSubsegment> pathSubsegments, HashSet <string> usedParameterNames, string pathSegment)
{
bool flag = false;
Type type = null;
foreach (PathSubsegment subsegment in pathSubsegments)
{
if ((type != null) && (type == subsegment.GetType()))
{
return(new ArgumentException(string.Format(CultureInfo.CurrentUICulture, System.Web.SR.GetString("Route_CannotHaveConsecutiveParameters"), new object[0]), "routeUrl"));
}
type = subsegment.GetType();
if (!(subsegment is LiteralSubsegment))
{
ParameterSubsegment subsegment3 = subsegment as ParameterSubsegment;
if (subsegment3 != null)
{
string parameterName = subsegment3.ParameterName;
if (subsegment3.IsCatchAll)
{
flag = true;
}
if (!IsValidParameterName(parameterName))
{
return(new ArgumentException(string.Format(CultureInfo.CurrentUICulture, System.Web.SR.GetString("Route_InvalidParameterName"), new object[] { parameterName }), "routeUrl"));
}
if (usedParameterNames.Contains(parameterName))
{
return(new ArgumentException(string.Format(CultureInfo.CurrentUICulture, System.Web.SR.GetString("Route_RepeatedParameter"), new object[] { parameterName }), "routeUrl"));
}
usedParameterNames.Add(parameterName);
}
}
}
if (flag && (pathSubsegments.Count != 1))
{
return(new ArgumentException(string.Format(CultureInfo.CurrentUICulture, System.Web.SR.GetString("Route_CannotHaveCatchAllInMultiSegment"), new object[0]), "routeUrl"));
}
return(null);
}
private static bool IsParameterRequired(ParameterSubsegment parameterSubsegment, RouteValueDictionary defaultValues, out object defaultValue) {
if (parameterSubsegment.IsCatchAll) {
defaultValue = null;
return false;
}
return !defaultValues.TryGetValue(parameterSubsegment.ParameterName, out defaultValue);
}
private bool MatchContentPathSegment(ContentPathSegment routeSegment, string requestPathSegment, RouteValueDictionary defaultValues, RouteValueDictionary matchedValues)
{
if (string.IsNullOrEmpty(requestPathSegment))
{
if (routeSegment.Subsegments.Count <= 1)
{
object obj2;
ParameterSubsegment subsegment = routeSegment.Subsegments[0] as ParameterSubsegment;
if (subsegment == null)
{
return(false);
}
if (defaultValues.TryGetValue(subsegment.ParameterName, out obj2))
{
matchedValues.Add(subsegment.ParameterName, obj2);
return(true);
}
}
return(false);
}
int length = requestPathSegment.Length;
int num2 = routeSegment.Subsegments.Count - 1;
ParameterSubsegment subsegment2 = null;
LiteralSubsegment subsegment3 = null;
while (num2 >= 0)
{
int num3 = length;
ParameterSubsegment subsegment4 = routeSegment.Subsegments[num2] as ParameterSubsegment;
if (subsegment4 != null)
{
subsegment2 = subsegment4;
}
else
{
LiteralSubsegment subsegment5 = routeSegment.Subsegments[num2] as LiteralSubsegment;
if (subsegment5 != null)
{
subsegment3 = subsegment5;
int startIndex = length - 1;
if (subsegment2 != 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 ((subsegment2 != null) && (((subsegment3 != null) && (subsegment4 == null)) || (num2 == 0)))
{
int num6;
int num7;
if (subsegment3 == null)
{
if (num2 == 0)
{
num6 = 0;
}
else
{
num6 = num3 + subsegment3.Literal.Length;
}
num7 = length;
}
else if ((num2 == 0) && (subsegment4 != null))
{
num6 = 0;
num7 = length;
}
else
{
num6 = num3 + subsegment3.Literal.Length;
num7 = length - num6;
}
string str = requestPathSegment.Substring(num6, num7);
if (string.IsNullOrEmpty(str))
{
return(false);
}
matchedValues.Add(subsegment2.ParameterName, str);
subsegment2 = null;
subsegment3 = null;
}
length = num3;
num2--;
}
if (length != 0)
{
return(routeSegment.Subsegments[0] is ParameterSubsegment);
}
return(true);
}
public BoundUrl Bind(RouteValueDictionary currentValues, RouteValueDictionary values, RouteValueDictionary defaultValues, RouteValueDictionary constraints)
{
if (currentValues == null)
{
currentValues = new RouteValueDictionary();
}
if (values == null)
{
values = new RouteValueDictionary();
}
if (defaultValues == null)
{
defaultValues = new RouteValueDictionary();
}
RouteValueDictionary acceptedValues = new RouteValueDictionary();
HashSet <string> unusedNewValues = new HashSet <string>(values.Keys, StringComparer.OrdinalIgnoreCase);
ForEachParameter(this.PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
object obj2;
object obj3;
string key = parameterSubsegment.ParameterName;
bool flag = values.TryGetValue(key, out obj2);
if (flag)
{
unusedNewValues.Remove(key);
}
bool flag2 = currentValues.TryGetValue(key, out obj3);
if ((flag && flag2) && !RoutePartsEqual(obj3, obj2))
{
return(false);
}
if (flag)
{
if (IsRoutePartNonEmpty(obj2))
{
acceptedValues.Add(key, obj2);
}
}
else if (flag2)
{
acceptedValues.Add(key, obj3);
}
return(true);
});
foreach (KeyValuePair <string, object> pair in values)
{
if (IsRoutePartNonEmpty(pair.Value) && !acceptedValues.ContainsKey(pair.Key))
{
acceptedValues.Add(pair.Key, pair.Value);
}
}
foreach (KeyValuePair <string, object> pair2 in currentValues)
{
string str = pair2.Key;
if (!acceptedValues.ContainsKey(str) && (GetParameterSubsegment(this.PathSegments, str) == null))
{
acceptedValues.Add(str, pair2.Value);
}
}
ForEachParameter(this.PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
object obj2;
if (!acceptedValues.ContainsKey(parameterSubsegment.ParameterName) && !IsParameterRequired(parameterSubsegment, defaultValues, out obj2))
{
acceptedValues.Add(parameterSubsegment.ParameterName, obj2);
}
return(true);
});
if (!ForEachParameter(this.PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
object obj2;
if (IsParameterRequired(parameterSubsegment, defaultValues, out obj2) && !acceptedValues.ContainsKey(parameterSubsegment.ParameterName))
{
return(false);
}
return(true);
}))
{
return(null);
}
RouteValueDictionary otherDefaultValues = new RouteValueDictionary(defaultValues);
ForEachParameter(this.PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
otherDefaultValues.Remove(parameterSubsegment.ParameterName);
return(true);
});
foreach (KeyValuePair <string, object> pair3 in otherDefaultValues)
{
object obj2;
if (values.TryGetValue(pair3.Key, out obj2))
{
unusedNewValues.Remove(pair3.Key);
if (!RoutePartsEqual(obj2, pair3.Value))
{
return(null);
}
}
}
StringBuilder builder = new StringBuilder();
StringBuilder builder2 = new StringBuilder();
bool flag2 = false;
for (int i = 0; i < this.PathSegments.Count; i++)
{
PathSegment segment = this.PathSegments[i];
if (segment is SeparatorPathSegment)
{
if (flag2 && (builder2.Length > 0))
{
builder.Append(builder2.ToString());
builder2.Length = 0;
}
flag2 = false;
if ((builder2.Length > 0) && (builder2[builder2.Length - 1] == '/'))
{
return(null);
}
builder2.Append("/");
}
else
{
ContentPathSegment segment2 = segment as ContentPathSegment;
if (segment2 != null)
{
bool flag3 = false;
foreach (PathSubsegment subsegment2 in segment2.Subsegments)
{
LiteralSubsegment subsegment3 = subsegment2 as LiteralSubsegment;
if (subsegment3 != null)
{
flag2 = true;
builder2.Append(UrlEncode(subsegment3.Literal));
}
else
{
ParameterSubsegment subsegment4 = subsegment2 as ParameterSubsegment;
if (subsegment4 != null)
{
object obj3;
object obj4;
if (flag2 && (builder2.Length > 0))
{
builder.Append(builder2.ToString());
builder2.Length = 0;
flag3 = true;
}
flag2 = false;
if (acceptedValues.TryGetValue(subsegment4.ParameterName, out obj3))
{
unusedNewValues.Remove(subsegment4.ParameterName);
}
defaultValues.TryGetValue(subsegment4.ParameterName, out obj4);
if (RoutePartsEqual(obj3, obj4))
{
builder2.Append(UrlEncode(Convert.ToString(obj3, CultureInfo.InvariantCulture)));
}
else
{
if (builder2.Length > 0)
{
builder.Append(builder2.ToString());
builder2.Length = 0;
}
builder.Append(UrlEncode(Convert.ToString(obj3, CultureInfo.InvariantCulture)));
flag3 = true;
}
}
}
}
if (flag3 && (builder2.Length > 0))
{
builder.Append(builder2.ToString());
builder2.Length = 0;
}
}
}
}
if (flag2 && (builder2.Length > 0))
{
builder.Append(builder2.ToString());
}
if (constraints != null)
{
foreach (KeyValuePair <string, object> pair4 in constraints)
{
unusedNewValues.Remove(pair4.Key);
}
}
if (unusedNewValues.Count > 0)
{
bool flag5 = true;
foreach (string str2 in unusedNewValues)
{
object obj5;
if (acceptedValues.TryGetValue(str2, out obj5))
{
builder.Append(flag5 ? '?' : '&');
flag5 = false;
builder.Append(Uri.EscapeDataString(str2));
builder.Append('=');
builder.Append(Uri.EscapeDataString(Convert.ToString(obj5, CultureInfo.InvariantCulture)));
}
}
}
return(new BoundUrl {
Url = builder.ToString(), Values = acceptedValues
});
}
private static Exception ValidateUrlSegment(IList <PathSubsegment> pathSubsegments, HashSet <string> usedParameterNames, string pathSegment)
{
bool segmentContainsCatchAll = false;
Type previousSegmentType = null;
foreach (PathSubsegment subsegment in pathSubsegments)
{
if (previousSegmentType != null)
{
if (previousSegmentType == subsegment.GetType())
{
return(new ArgumentException(
String.Format(
CultureInfo.CurrentCulture,
SR.GetString(SR.Route_CannotHaveConsecutiveParameters)
),
"routeUrl"));
}
}
previousSegmentType = subsegment.GetType();
LiteralSubsegment literalSubsegment = subsegment as LiteralSubsegment;
if (literalSubsegment != null)
{
// Nothing to validate for literals - everything is valid
}
else
{
ParameterSubsegment parameterSubsegment = subsegment as ParameterSubsegment;
if (parameterSubsegment != null)
{
string parameterName = parameterSubsegment.ParameterName;
if (parameterSubsegment.IsCatchAll)
{
segmentContainsCatchAll = true;
}
// Check for valid characters in the parameter name
if (!IsValidParameterName(parameterName))
{
return(new ArgumentException(
String.Format(
CultureInfo.CurrentUICulture,
SR.GetString(SR.Route_InvalidParameterName),
parameterName
),
"routeUrl"));
}
if (usedParameterNames.Contains(parameterName))
{
return(new ArgumentException(
String.Format(
CultureInfo.CurrentUICulture,
SR.GetString(SR.Route_RepeatedParameter),
parameterName
),
"routeUrl"));
}
else
{
usedParameterNames.Add(parameterName);
}
}
else
{
Debug.Fail("Invalid path subsegment type");
}
}
}
if (segmentContainsCatchAll && (pathSubsegments.Count != 1))
{
return(new ArgumentException(
String.Format(
CultureInfo.CurrentCulture,
SR.GetString(SR.Route_CannotHaveCatchAllInMultiSegment)
),
"routeUrl"));
}
return(null);
}
private bool MatchContentPathSegment(ContentPathSegment routeSegment, string requestPathSegment, RouteValueDictionary defaultValues, RouteValueDictionary matchedValues)
{
if (String.IsNullOrEmpty(requestPathSegment))
{
// If there's no data to parse, we must have exactly one parameter segment and no other segments - otherwise no match
if (routeSegment.Subsegments.Count > 1)
{
return(false);
}
ParameterSubsegment parameterSubsegment = routeSegment.Subsegments[0] as ParameterSubsegment;
if (parameterSubsegment == null)
{
return(false);
}
// We must have a default value since there's no value in the request URL
object parameterValue;
if (defaultValues.TryGetValue(parameterSubsegment.ParameterName, out parameterValue))
{
// If there's a default value for this parameter, use that default value
matchedValues.Add(parameterSubsegment.ParameterName, parameterValue);
return(true);
}
else
{
// If there's no default value, this segment doesn't match
return(false);
}
}
// Find last literal segment and get its last index in the string
int lastIndex = requestPathSegment.Length;
int indexOfLastSegmentUsed = routeSegment.Subsegments.Count - 1;
ParameterSubsegment parameterNeedsValue = null; // Keeps track of a parameter segment that is pending a value
LiteralSubsegment lastLiteral = null; // Keeps track of the left-most literal we've encountered
while (indexOfLastSegmentUsed >= 0)
{
int newLastIndex = lastIndex;
ParameterSubsegment parameterSubsegment = routeSegment.Subsegments[indexOfLastSegmentUsed] as ParameterSubsegment;
if (parameterSubsegment != null)
{
// Hold on to the parameter so that we can fill it in when we locate the next literal
parameterNeedsValue = parameterSubsegment;
}
else
{
LiteralSubsegment literalSubsegment = routeSegment.Subsegments[indexOfLastSegmentUsed] as LiteralSubsegment;
if (literalSubsegment != null)
{
lastLiteral = literalSubsegment;
int startIndex = lastIndex - 1;
// If we have a pending parameter subsegment, we must leave at least one character for that
if (parameterNeedsValue != null)
{
startIndex--;
}
if (startIndex < 0)
{
return(false);
}
int indexOfLiteral = requestPathSegment.LastIndexOf(literalSubsegment.Literal, startIndex, StringComparison.OrdinalIgnoreCase);
if (indexOfLiteral == -1)
{
// If we couldn't find this literal index, this segment cannot match
return(false);
}
// If the first subsegment is a literal, it must match at the right-most extent of the request URL.
// Without this check if your route had "/Foo/" we'd match the request URL "/somethingFoo/".
// This check is related to the check we do at the very end of this function.
if (indexOfLastSegmentUsed == (routeSegment.Subsegments.Count - 1))
{
if ((indexOfLiteral + literalSubsegment.Literal.Length) != requestPathSegment.Length)
{
return(false);
}
}
newLastIndex = indexOfLiteral;
}
else
{
Debug.Fail("Invalid path segment type");
}
}
if ((parameterNeedsValue != null) && (((lastLiteral != null) && (parameterSubsegment == null)) || (indexOfLastSegmentUsed == 0)))
{
// If we have a pending parameter that needs a value, grab that value
int parameterStartIndex;
int parameterTextLength;
if (lastLiteral == null)
{
if (indexOfLastSegmentUsed == 0)
{
parameterStartIndex = 0;
}
else
{
parameterStartIndex = newLastIndex;
Debug.Fail("indexOfLastSegementUsed should always be 0 from the check above");
}
parameterTextLength = lastIndex;
}
else
{
// If we're getting a value for a parameter that is somewhere in the middle of the segment
if ((indexOfLastSegmentUsed == 0) && (parameterSubsegment != null))
{
parameterStartIndex = 0;
parameterTextLength = lastIndex;
}
else
{
parameterStartIndex = newLastIndex + lastLiteral.Literal.Length;
parameterTextLength = lastIndex - parameterStartIndex;
}
}
string parameterValueString = requestPathSegment.Substring(parameterStartIndex, parameterTextLength);
if (String.IsNullOrEmpty(parameterValueString))
{
// If we're here that means we have a segment that contains multiple sub-segments.
// For these segments all parameters must have non-empty values. If the parameter
// has an empty value it's not a match.
return(false);
}
else
{
// If there's a value in the segment for this parameter, use the subsegment value
matchedValues.Add(parameterNeedsValue.ParameterName, parameterValueString);
}
parameterNeedsValue = null;
lastLiteral = null;
}
lastIndex = newLastIndex;
indexOfLastSegmentUsed--;
}
// If the last subsegment is a parameter, it's OK that we didn't parse all the way to the left extent of
// the string since the parameter will have consumed all the remaining text anyway. If the last subsegment
// is a literal then we *must* have consumed the entire text in that literal. Otherwise we end up matching
// the route "Foo" to the request URL "somethingFoo". Thus we have to check that we parsed the *entire*
// request URL in order for it to be a match.
// This check is related to the check we do earlier in this function for LiteralSubsegments.
return((lastIndex == 0) || (routeSegment.Subsegments[0] is ParameterSubsegment));
}
public BoundUrl Bind(RouteValueDictionary currentValues, RouteValueDictionary values, RouteValueDictionary defaultValues, RouteValueDictionary constraints)
{
if (currentValues == null)
{
currentValues = new RouteValueDictionary();
}
if (values == null)
{
values = new RouteValueDictionary();
}
if (defaultValues == null)
{
defaultValues = new RouteValueDictionary();
}
// The set of values we should be using when generating the URL in this route
RouteValueDictionary acceptedValues = new RouteValueDictionary();
// Keep track of which new values have been used
HashSet <string> unusedNewValues = new HashSet <string>(values.Keys, StringComparer.OrdinalIgnoreCase);
// Step 1: Get the list of values we're going to try to use to match and generate this URL
// Find out which entries in the URL are valid for the URL we want to generate.
// If the URL had ordered parameters a="1", b="2", c="3" and the new values
// specified that b="9", then we need to invalidate everything after it. The new
// values should then be a="1", b="9", c=<no value>.
ForEachParameter(PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
// If it's a parameter subsegment, examine the current value to see if it matches the new value
string parameterName = parameterSubsegment.ParameterName;
object newParameterValue;
bool hasNewParameterValue = values.TryGetValue(parameterName, out newParameterValue);
if (hasNewParameterValue)
{
unusedNewValues.Remove(parameterName);
}
object currentParameterValue;
bool hasCurrentParameterValue = currentValues.TryGetValue(parameterName, out currentParameterValue);
if (hasNewParameterValue && hasCurrentParameterValue)
{
if (!RoutePartsEqual(currentParameterValue, newParameterValue))
{
// Stop copying current values when we find one that doesn't match
return(false);
}
}
// If the parameter is a match, add it to the list of values we will use for URL generation
if (hasNewParameterValue)
{
if (IsRoutePartNonEmpty(newParameterValue))
{
acceptedValues.Add(parameterName, newParameterValue);
}
}
else
{
if (hasCurrentParameterValue)
{
acceptedValues.Add(parameterName, currentParameterValue);
}
}
return(true);
});
// Add all remaining new values to the list of values we will use for URL generation
foreach (var newValue in values)
{
if (IsRoutePartNonEmpty(newValue.Value))
{
if (!acceptedValues.ContainsKey(newValue.Key))
{
acceptedValues.Add(newValue.Key, newValue.Value);
}
}
}
// Add all current values that aren't in the URL at all
foreach (var currentValue in currentValues)
{
string parameterName = currentValue.Key;
if (!acceptedValues.ContainsKey(parameterName))
{
ParameterSubsegment parameterSubsegment = GetParameterSubsegment(PathSegments, parameterName);
if (parameterSubsegment == null)
{
acceptedValues.Add(parameterName, currentValue.Value);
}
}
}
// Add all remaining default values from the route to the list of values we will use for URL generation
ForEachParameter(PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
if (!acceptedValues.ContainsKey(parameterSubsegment.ParameterName))
{
object defaultValue;
if (!IsParameterRequired(parameterSubsegment, defaultValues, out defaultValue))
{
// Add the default value only if there isn't already a new value for it and
// only if it actually has a default value, which we determine based on whether
// the parameter value is required.
acceptedValues.Add(parameterSubsegment.ParameterName, defaultValue);
}
}
return(true);
});
// All required parameters in this URL must have values from somewhere (i.e. the accepted values)
bool hasAllRequiredValues = ForEachParameter(PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
object defaultValue;
if (IsParameterRequired(parameterSubsegment, defaultValues, out defaultValue))
{
if (!acceptedValues.ContainsKey(parameterSubsegment.ParameterName))
{
// If the route parameter value is required that means there's
// no default value, so if there wasn't a new value for it
// either, this route won't match.
return(false);
}
}
return(true);
});
if (!hasAllRequiredValues)
{
return(null);
}
// All other default values must match if they are explicitly defined in the new values
RouteValueDictionary otherDefaultValues = new RouteValueDictionary(defaultValues);
ForEachParameter(PathSegments, delegate(ParameterSubsegment parameterSubsegment) {
otherDefaultValues.Remove(parameterSubsegment.ParameterName);
return(true);
});
foreach (var defaultValue in otherDefaultValues)
{
object value;
if (values.TryGetValue(defaultValue.Key, out value))
{
unusedNewValues.Remove(defaultValue.Key);
if (!RoutePartsEqual(value, defaultValue.Value))
{
// If there is a non-parameterized value in the route and there is a
// new value for it and it doesn't match, this route won't match.
return(null);
}
}
}
// Step 2: If the route is a match generate the appropriate URL
StringBuilder url = new StringBuilder();
StringBuilder pendingParts = new StringBuilder();
bool pendingPartsAreAllSafe = false;
bool blockAllUrlAppends = false;
for (int i = 0; i < PathSegments.Count; i++)
{
PathSegment pathSegment = PathSegments[i]; // parsedRouteUrlPart
if (pathSegment is SeparatorPathSegment)
{
if (pendingPartsAreAllSafe)
{
// Accept
if (pendingParts.Length > 0)
{
if (blockAllUrlAppends)
{
return(null);
}
// Append any pending literals to the URL
url.Append(pendingParts.ToString());
pendingParts.Length = 0;
}
}
pendingPartsAreAllSafe = false;
// Guard against appending multiple separators for empty segements
if (pendingParts.Length > 0 && pendingParts[pendingParts.Length - 1] == '/')
{
// Dev10 676725: Route should not be matched if that causes mismatched tokens
// Dev11 86819: We will allow empty matches if all subsequent segments are null
if (blockAllUrlAppends)
{
return(null);
}
// Append any pending literals to the URL(without the trailing slash) and prevent any future appends
url.Append(pendingParts.ToString(0, pendingParts.Length - 1));
pendingParts.Length = 0;
blockAllUrlAppends = true;
}
else
{
pendingParts.Append("/");
}
}
else
{
ContentPathSegment contentPathSegment = pathSegment as ContentPathSegment;
if (contentPathSegment != null)
{
// Segments are treated as all-or-none. We should never output a partial segment.
// If we add any subsegment of this segment to the generated URL, we have to add
// the complete match. For example, if the subsegment is "{p1}-{p2}.xml" and we
// used a value for {p1}, we have to output the entire segment up to the next "/".
// Otherwise we could end up with the partial segment "v1" instead of the entire
// segment "v1-v2.xml".
bool addedAnySubsegments = false;
foreach (PathSubsegment subsegment in contentPathSegment.Subsegments)
{
LiteralSubsegment literalSubsegment = subsegment as LiteralSubsegment;
if (literalSubsegment != null)
{
// If it's a literal we hold on to it until we are sure we need to add it
pendingPartsAreAllSafe = true;
pendingParts.Append(UrlEncode(literalSubsegment.Literal));
}
else
{
ParameterSubsegment parameterSubsegment = subsegment as ParameterSubsegment;
if (parameterSubsegment != null)
{
if (pendingPartsAreAllSafe)
{
// Accept
if (pendingParts.Length > 0)
{
if (blockAllUrlAppends)
{
return(null);
}
// Append any pending literals to the URL
url.Append(pendingParts.ToString());
pendingParts.Length = 0;
addedAnySubsegments = true;
}
}
pendingPartsAreAllSafe = false;
// If it's a parameter, get its value
object acceptedParameterValue;
bool hasAcceptedParameterValue = acceptedValues.TryGetValue(parameterSubsegment.ParameterName, out acceptedParameterValue);
if (hasAcceptedParameterValue)
{
unusedNewValues.Remove(parameterSubsegment.ParameterName);
}
object defaultParameterValue;
defaultValues.TryGetValue(parameterSubsegment.ParameterName, out defaultParameterValue);
if (RoutePartsEqual(acceptedParameterValue, defaultParameterValue))
{
// If the accepted value is the same as the default value, mark it as pending since
// we won't necessarily add it to the URL we generate.
pendingParts.Append(UrlEncode(Convert.ToString(acceptedParameterValue, CultureInfo.InvariantCulture)));
}
else
{
if (blockAllUrlAppends)
{
return(null);
}
// Add the new part to the URL as well as any pending parts
if (pendingParts.Length > 0)
{
// Append any pending literals to the URL
url.Append(pendingParts.ToString());
pendingParts.Length = 0;
}
url.Append(UrlEncode(Convert.ToString(acceptedParameterValue, CultureInfo.InvariantCulture)));
addedAnySubsegments = true;
}
}
else
{
Debug.Fail("Invalid path subsegment type");
}
}
}
if (addedAnySubsegments)
{
// See comment above about why we add the pending parts
if (pendingParts.Length > 0)
{
if (blockAllUrlAppends)
{
return(null);
}
// Append any pending literals to the URL
url.Append(pendingParts.ToString());
pendingParts.Length = 0;
}
}
}
else
{
Debug.Fail("Invalid path segment type");
}
}
}
if (pendingPartsAreAllSafe)
{
// Accept
if (pendingParts.Length > 0)
{
if (blockAllUrlAppends)
{
return(null);
}
// Append any pending literals to the URL
url.Append(pendingParts.ToString());
}
}
// Process constraints keys
if (constraints != null)
{
// If there are any constraints, mark all the keys as being used so that we don't
// generate query string items for custom constraints that don't appear as parameters
// in the URL format.
foreach (var constraintsItem in constraints)
{
unusedNewValues.Remove(constraintsItem.Key);
}
}
// Add remaining new values as query string parameters to the URL
if (unusedNewValues.Count > 0)
{
// Generate the query string
bool firstParam = true;
foreach (string unusedNewValue in unusedNewValues)
{
object value;
if (acceptedValues.TryGetValue(unusedNewValue, out value))
{
url.Append(firstParam ? '?' : '&');
firstParam = false;
url.Append(Uri.EscapeDataString(unusedNewValue));
url.Append('=');
url.Append(Uri.EscapeDataString(Convert.ToString(value, CultureInfo.InvariantCulture)));
}
}
}
return(new BoundUrl {
Url = url.ToString(),
Values = acceptedValues
});
}