Github user martin-g commented on a diff in the pull request:
https://github.com/apache/wicket/pull/142#discussion_r43857837
--- Diff:
wicket-core/src/main/java/org/apache/wicket/resource/FileSystemResource.java ---
@@ -0,0 +1,145 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.wicket.resource;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+
+import org.apache.wicket.Application;
+import org.apache.wicket.WicketRuntimeException;
+import org.apache.wicket.request.cycle.RequestCycle;
+import org.apache.wicket.request.resource.AbstractResource;
+import org.apache.wicket.request.resource.PartWriterCallback;
+import org.apache.wicket.util.lang.Args;
+
+/**
+ * Used to provide resources based on the on Java NIO FileSystem API.<br>
+ * <br>
+ * For more information see {@link
org.apache.wicket.markup.html.media.FileSystemResourceReference}
+ *
+ * @author Tobias Soloschenko
+ *
+ */
+public class FileSystemResource extends AbstractResource
+{
+ private static final long serialVersionUID = 1L;
+
+ private final Path path;
+
+ /**
+ * Creates a new file system resource based on the given path
+ *
+ * @param path
+ * the path to be read for the resource
+ */
+ public FileSystemResource(Path path)
+ {
+ Args.notNull(path, "path");
+ this.path = path;
+ }
+
+ /**
+ * Creates a new resource response and reads the given path
+ */
+ @Override
+ protected ResourceResponse newResourceResponse(Attributes attributes)
+ {
+ try
+ {
+ long size = getSize();
+ ResourceResponse resourceResponse = new
ResourceResponse();
+ resourceResponse.setContentType(getMimeType());
+ resourceResponse.setAcceptRange(ContentRangeType.BYTES);
+ resourceResponse.setContentLength(size);
+ resourceResponse =
configureResourceResponse(resourceResponse);
+ RequestCycle cycle = RequestCycle.get();
+ Long startbyte =
cycle.getMetaData(CONTENT_RANGE_STARTBYTE);
+ Long endbyte = cycle.getMetaData(CONTENT_RANGE_ENDBYTE);
+ resourceResponse.setWriteCallback(new
PartWriterCallback(getInputStream(), size,
+ startbyte, endbyte));
+ return resourceResponse;
+ }
+ catch (IOException e)
+ {
+ throw new WicketRuntimeException(
+ "An error occured while processing the media
resource response", e);
+ }
+ }
+
+ /**
+ * Configures the resource response by overriding it with additional
information
+ *
+ * @param resourceResponse
+ * the resource response to be configured
+ *
+ * @return the resource response to be configured
+ */
+ protected ResourceResponse configureResourceResponse(ResourceResponse
resourceResponse)
+ {
+ return resourceResponse;
+ }
+
+ /**
+ * Gets the size of the resource
+ *
+ * @return the size of the resource
+ * @throws IOException
+ * if the size attribute can't be read
+ */
+ protected long getSize() throws IOException
+ {
+ return Files.readAttributes(path,
BasicFileAttributes.class).size();
+ }
+
+ /**
+ * Gets the mime type to be used for the response it first uses the URL
connection to get the
+ * mime type and after this the FileTypeDetector SPI is used.
+ *
+ * @return the mime type to be used for the response
+ * @throws IOException
+ * if the mime type could'nt be resoulved
+ */
+ protected String getMimeType() throws IOException
+ {
+ String mimeType = null;
+ if (Application.exists())
+ {
+ mimeType =
Application.get().getMimeType(path.getFileName().toString());
+ }
+ if (mimeType == null)
+ {
+
+ mimeType = Files.probeContentType(path);
+ }
+ return mimeType;
+ }
+
+ /**
+ * Gets the input stream of the given path
+ *
+ * @return the input stream of the given path
+ * @throws IOException
+ * if there is an exception while receiving the input stream
+ */
+ protected InputStream getInputStream() throws IOException
--- End diff --
I am not sure this should be overridable. What is the use case ?
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