diff --git a/src/net/oschina/git/utils/HttpUtil.java b/src/net/oschina/git/utils/HttpUtil.java
index 00257eb1e8bfcbb07609189e58f992ffd7e35f6f..ff118355e90692e2e70b574d81d5a8b959471110 100644
--- a/src/net/oschina/git/utils/HttpUtil.java
+++ b/src/net/oschina/git/utils/HttpUtil.java
@@ -36,17 +36,20 @@ public class HttpUtil {
 			header.put("User-Agent", "CC/1.0-$EC");
 		}
 	}
-	public  static String post(String url,List<NameValuePair> params,Shell shell) throws ConnectTimeoutException, ClientProtocolException, IOException{
-		HttpPost hp = new HttpPost(url); 
+public static String post(String url, List<NameValuePair> params, Shell shell)
+			throws ConnectTimeoutException, ClientProtocolException, IOException {
+		HttpPost hp = new HttpPost(url);
 		HttpResponse response = null;
-		for(String st:header.keySet()){
-			hp.setHeader(st, header.get(st));
+		for (String st : getDefaultHeaders().keySet()) {
+			hp.setHeader(st, getDefaultHeaders().get(st));
+		}
+		HttpEntity entity = new UrlEncodedFormEntity(params, "utf-8");
+		hp.setEntity(entity);
+		try (CloseableHttpClient httpClient = getHttpClient()) {
+			response = httpClient.execute(hp);
+			String responseHtml = EntityUtils.toString(response.getEntity());
+			return responseHtml;
 		}
-		HttpEntity entity = new UrlEncodedFormEntity(params, "utf-8");  
-        hp.setEntity(entity);  
-		response = httpclient.execute(hp);
-        String responseHtml = EntityUtils.toString(response.getEntity());
-		return responseHtml;
 	}
 	public static String get(String url) throws ClientProtocolException, IOException{
 		HttpGet hg = new HttpGet(url);