metrics set reqeust

Author: YangSen-qn

library/src/main/java/com/qiniu/android/http/metrics/UploadSingleRequestMetrics.java

@@ -65,9 +65,7 @@ public Request getRequest() {
 
     public void setRequest(Request request) {
         if (request != null) {
-            this.request = new Request(request.urlString, request.httpMethod, request.allHeaders, null,
-                    request.connectTimeout, request.readTimeout, request.writeTimeout);
-
+            this.request = request.copyWithoutBody();
             long headerLength = 0;
             long bodyLength = 0;
             if (request.allHeaders != null) {

library/src/main/java/com/qiniu/android/http/request/Request.java

@@ -69,4 +69,11 @@ public String getHost() {
     protected boolean isValid() {
         return this.urlString == null || httpMethod == null;
     }
+
+    public Request copyWithoutBody() {
+        Request request = new Request(urlString, httpMethod, allHeaders, null,
+                connectTimeout, readTimeout, writeTimeout);
+        request.host = host;
+        return request;
+    }
 }