feat: support AWS Model CrossRegion

relay/channel/aws/relay-aws.go

@@ -48,6 +48,28 @@ func wrapErr(err error) *dto.OpenAIErrorWithStatusCode {
 	}
 }
 
+func awsRegionPrefix(awsRegionId string) string {
+	parts := strings.Split(awsRegionId, "-")
+	regionPrefix := ""
+	if len(parts) > 0 {
+		regionPrefix = parts[0]
+	}
+	return regionPrefix
+}
+
+func awsModelCanCrossRegion(awsModelId, awsRegionPrefix string) bool {
+	regionSet, exists := awsModelCanCrossRegionMap[awsModelId]
+	return exists && regionSet[awsRegionPrefix]
+}
+
+func awsModelCrossRegion(awsModelId, awsRegionPrefix string) string {
+	modelPrefix, find := awsRegionCrossModelPrefixMap[awsRegionPrefix]
+	if !find {
+		return awsModelId
+	}
+	return modelPrefix + "." + awsModelId
+}
+
 func awsModelID(requestModel string) (string, error) {
 	if awsModelID, ok := awsModelIDMap[requestModel]; ok {
 		return awsModelID, nil
@@ -67,6 +89,12 @@ func awsHandler(c *gin.Context, info *relaycommon.RelayInfo, requestMode int) (*
 		return wrapErr(errors.Wrap(err, "awsModelID")), nil
 	}
 
+	awsRegionPrefix := awsRegionPrefix(awsCli.Options().Region)
+	canCrossRegion := awsModelCanCrossRegion(awsModelId, awsRegionPrefix)
+	if canCrossRegion {
+		awsModelId = awsModelCrossRegion(awsModelId, awsRegionPrefix)
+	}
+
 	awsReq := &bedrockruntime.InvokeModelInput{
 		ModelId:     aws.String(awsModelId),
 		Accept:      aws.String("application/json"),