Add leftmost wildcard support to descriptor values

Signed-off-by: Luki Boras <[email protected]>

src/config/config_impl.go

@@ -189,8 +189,8 @@ func (this *rateLimitDescriptor) loadDescriptors(config RateLimitConfigToLoad, p
 		newDescriptor.loadDescriptors(config, newParentKey+".", descriptorConfig.Descriptors, statsManager)
 		this.descriptors[finalKey] = newDescriptor
 
-		// Preload keys ending with "*" symbol.
-		if finalKey[len(finalKey)-1:] == "*" {
+		// Preload keys starting or ending with "*" symbol.
+		if strings.HasPrefix(finalKey, "*") || strings.HasSuffix(finalKey, "*") {
 			this.wildcardKeys = append(this.wildcardKeys, finalKey)
 		}
 	}
@@ -315,6 +315,10 @@ func (this *rateLimitConfigImpl) GetLimit(
 
 		if nextDescriptor == nil && len(prevDescriptor.wildcardKeys) > 0 {
 			for _, wildcardKey := range prevDescriptor.wildcardKeys {
+				if strings.HasSuffix(finalKey, strings.TrimPrefix(wildcardKey, "*")) {
+					nextDescriptor = descriptorsMap[wildcardKey]
+					break
+				}
 				if strings.HasPrefix(finalKey, strings.TrimSuffix(wildcardKey, "*")) {
 					nextDescriptor = descriptorsMap[wildcardKey]
 					break