diff --git a/src/main/java/run/halo/sitemap/SitemapPluginConfig.java b/src/main/java/run/halo/sitemap/SitemapPluginConfig.java
index 1989351..7f366c8 100644
--- a/src/main/java/run/halo/sitemap/SitemapPluginConfig.java
+++ b/src/main/java/run/halo/sitemap/SitemapPluginConfig.java
@@ -3,6 +3,7 @@
 import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
 import static org.springframework.web.reactive.function.server.RequestPredicates.accept;
 
+import java.nio.charset.StandardCharsets;
 import lombok.AllArgsConstructor;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.context.annotation.Bean;
@@ -33,9 +34,12 @@ RouterFunction<ServerResponse> sitemapRouterFunction(CachedSitemapGetter cachedS
                 var options = SitemapGeneratorOptions.builder()
                     .siteUrl(url)
                     .build();
+                var xmlMediaType = new MediaType(MediaType.TEXT_XML, StandardCharsets.UTF_8);
                 return cachedSitemapGetter.get(options)
+                    .filter(sitemap -> !sitemap.isBlank())
                     .flatMap(sitemap -> ServerResponse.ok()
-                        .contentType(MediaType.TEXT_XML).bodyValue(sitemap));
+                        .contentType(xmlMediaType).bodyValue(sitemap))
+                    .switchIfEmpty(ServerResponse.noContent().build());
             }
         );
     }
diff --git a/src/main/java/run/halo/sitemap/UrlUtils.java b/src/main/java/run/halo/sitemap/UrlUtils.java
index c633eb8..5dc4a25 100644
--- a/src/main/java/run/halo/sitemap/UrlUtils.java
+++ b/src/main/java/run/halo/sitemap/UrlUtils.java
@@ -20,11 +20,11 @@ public final class UrlUtils {
      */
     public static String escapeSitemapUrl(String url) {
         Assert.notNull(url, "The url must not be null");
-        return url.replaceAll("&", "&amp;")
-            .replaceAll("'", "&apos;")
-            .replaceAll("\"", "&quot;")
-            .replaceAll(">", "&gt;")
-            .replaceAll("<", "&lt;");
+        return url.replace("&", "&amp;")
+            .replace("'", "&apos;")
+            .replace("\"", "&quot;")
+            .replace(">", "&gt;")
+            .replace("<", "&lt;");
     }
 
     public static URI toURI(String s) {