Fix cn aws url (#596)

* Check for China region whenn determining the AWS URL

* Fix domain URL

* Update version number in preparation for release version tagging

build.sbt

@@ -26,7 +26,7 @@ val testSparkVersion = sys.props.get("spark.testVersion").getOrElse("3.5.0")
  * Tests/jenkins/BumpUpSparkConnectorVersion/run.sh
  * in snowflake repository.
  */
-val sparkConnectorVersion = "3.1.0"
+val sparkConnectorVersion = "3.1.1"
 
 lazy val ItTest = config("it") extend Test
 

src/main/scala/net/snowflake/spark/snowflake/io/CloudStorageOperations.scala

@@ -406,9 +406,15 @@ object CloudStorageOperations {
         s3ClientBuilder.withEndpointConfiguration(
           new AwsClientBuilder.EndpointConfiguration(stageEndPoint.get, regionName.get))
       } else if (useRegionUrl.get.toBoolean) {
+        val awsDomain: String =
+          if (regionName.get.toLowerCase().startsWith("cn-")) {
+            ".amazonaws.com.cn"
+          } else {
+            ".amazonaws.com"
+          }
         s3ClientBuilder.withEndpointConfiguration(
           new AwsClientBuilder.EndpointConfiguration(
-            "s3." + regionName.get + ".amazonaws.com", regionName.get))
+            "s3." + regionName.get + awsDomain, regionName.get))
       } else {
         s3ClientBuilder.withRegion(regionName.get)
       }