Revise logging level from warn to info, as we have passed the exception to onError. refs #1094

Author: sutra

webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java

@@ -82,12 +82,16 @@ public Page download(Request request, Task task) {
         try {
             httpResponse = httpClient.execute(requestContext.getHttpUriRequest(), requestContext.getHttpClientContext());
             page = handleResponse(request, request.getCharset() != null ? request.getCharset() : task.getSite().getCharset(), httpResponse, task);
+
             onSuccess(request, task);
             logger.info("downloading page success {}", request.getUrl());
+
             return page;
         } catch (IOException e) {
-            logger.warn("download page {} error", request.getUrl(), e);
+
             onError(request, task, e);
+            logger.info("download page {} error", request.getUrl(), e);
+
             return page;
         } finally {
             if (httpResponse != null) {