Reduce DirectoryHandler logging noise for normal IOExceptions

CHANGELOG.md

@@ -23,6 +23,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Upgrade [pippo-pebble] to Pebble 2.2.2
 - Make `chunked` transfer-encoding optional, not the default
 - Make the text/plain content type engine handle returning reasonable types like String, CharSequence, char[], and byte[]
+- Reduce the DirectoryHandler logging noise caused by connection resets, broken pipes, and connection timeouts by not logging the IOException stacktrace
 
 #### Added
 - [#245]: Route groups

pippo-core/src/main/java/ro/pippo/core/route/DirectoryHandler.java

@@ -259,6 +259,14 @@ protected void streamResource(URL resourceUrl, RouteContext routeContext) {
             } else {
                 sendResource(resourceUrl, routeContext);
             }
+        } catch (IOException e) {
+            String message = e.getMessage();
+            if (!StringUtils.isNullOrEmpty(message)) {
+                log.warn("Error sending resource {} to {}: {}",
+                    resourceUrl, routeContext.getRequest().getClientIp(), message);
+            } else {
+                throw new PippoRuntimeException(e, "Failed to stream resource {}", resourceUrl);
+            }
         } catch (Exception e) {
             throw new PippoRuntimeException(e, "Failed to stream resource {}", resourceUrl);
         }