diff --git a/src/net/oschina/git/utils/HttpUtil.java b/src/net/oschina/git/utils/HttpUtil.java
index 00257eb1e8bfcbb07609189e58f992ffd7e35f6f..7acb7b28cb6d117e493cd3458121e5aeac1d6dbe 100644
--- a/src/net/oschina/git/utils/HttpUtil.java
+++ b/src/net/oschina/git/utils/HttpUtil.java
@@ -48,13 +48,15 @@ public class HttpUtil {
         String responseHtml = EntityUtils.toString(response.getEntity());
 		return responseHtml;
 	}
-	public static String get(String url) throws ClientProtocolException, IOException{
+	public static String get(String url) throws ClientProtocolException, IOException {
 		HttpGet hg = new HttpGet(url);
-		for(String st:header.keySet()){
-			hg.setHeader(st, header.get(st));
+		for (String st : getDefaultHeaders().keySet()) {
+			hg.setHeader(st, getDefaultHeaders().get(st));
+		}
+		try (CloseableHttpClient httpClient = getHttpClient()) {
+			HttpResponse response = httpClient.execute(hg);
+			String responseHtml = EntityUtils.toString(response.getEntity());
+			return responseHtml;
 		}
-		HttpResponse response = httpclient.execute(hg);  
-        String responseHtml = EntityUtils.toString(response.getEntity()); 
-        return responseHtml;
 	}
 }