etag不匹配时增加body长度信息与requestid (#121)

Co-authored-by: gavinhgchen <[email protected]>

Author: chen-honggang

src/op/base_op.cpp

@@ -188,6 +188,8 @@ CosResult BaseOp::DownloadAction(const std::string& host,
       &xml_err_str, os, &err_msg, &real_byte, req.CheckMD5(), req.GetCaLocation());
   if (http_code == -1) {
     result.SetErrorMsg(err_msg);
+    resp->ParseFromHeaders(resp_headers);
+    result.SetXCosRequestId(resp->GetXCosRequestId());
     return result;
   }
 

src/util/http_sender.cpp

@@ -452,7 +452,9 @@ int HttpSender::SendRequest(
           *err_msg =
               "Md5 of response body is not equal to the etag in the header."
               " Body Md5= " +
-              md5_str + ", etag=" + etag;
+              md5_str + ", etag=" + etag +
+              ", recv-len=" + StringUtil::Uint64ToString(*real_byte) + 
+              ", content-length=" + content_length_header;
           SDK_LOG_ERR("Check Md5 fail, %s", err_msg->c_str());
           ret = -1;
         }