SNOW-1460355: Fix getHostFromServerUrl (snowflakedb#1779)

Author: sfc-gh-pbulawa

src/main/java/net/snowflake/client/core/SFLoginInput.java

@@ -426,7 +426,11 @@ static boolean getBooleanValue(Object v) {
   String getHostFromServerUrl() throws SFException {
     URL url;
     try {
-      url = new URL(serverUrl);
+      if (!serverUrl.startsWith("http")) {
+        url = new URL("https://" + serverUrl);
+      } else {
+        url = new URL(serverUrl);
+      }
     } catch (MalformedURLException e) {
       throw new SFException(
           e, ErrorCode.INTERNAL_ERROR, "Invalid serverUrl for retrieving host name");

src/test/java/net/snowflake/client/core/SFLoginInputTest.java

@@ -0,0 +1,22 @@
+package net.snowflake.client.core;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class SFLoginInputTest {
+
+  @Test
+  public void testGetHostFromServerUrlWithoutProtocolShouldNotThrow() throws SFException {
+    SFLoginInput sfLoginInput = new SFLoginInput();
+    sfLoginInput.setServerUrl("host.com:443");
+    assertEquals("host.com", sfLoginInput.getHostFromServerUrl());
+  }
+
+  @Test
+  public void testGetHostFromServerUrlWithProtocolShouldNotThrow() throws SFException {
+    SFLoginInput sfLoginInput = new SFLoginInput();
+    sfLoginInput.setServerUrl("https://host.com");
+    assertEquals("host.com", sfLoginInput.getHostFromServerUrl());
+  }
+}