| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * Licensed 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.onosproject.ui.impl; |
| |
| import com.google.common.io.ByteStreams; |
| import org.onosproject.rest.AbstractInjectionResource; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.imageio.ImageIO; |
| import javax.ws.rs.GET; |
| import javax.ws.rs.Path; |
| import javax.ws.rs.PathParam; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.core.Response; |
| import java.awt.image.BufferedImage; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Resource for serving up post-processed raw data files. |
| */ |
| @Path("/") |
| public class FooResource extends AbstractInjectionResource { |
| |
| private static final String ROOT = "/raw/"; |
| private static final String PNG = "png"; |
| private static final byte UMASK = -16; |
| private static final byte LMASK = 15; |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private static void clean(ByteBuffer bb, byte b1, byte b2) { |
| bb.put((byte) ((b1 & UMASK) | (b2 & LMASK))); |
| } |
| |
| private static ByteBuffer decodeBin(byte[] bytes) { |
| int size = bytes.length; |
| ByteBuffer bb = ByteBuffer.allocate(size / 2); |
| for (int i = 0; i < size; i += 2) { |
| clean(bb, bytes[i], bytes[i + 1]); |
| } |
| return bb; |
| } |
| |
| private static void watermark(BufferedImage bi) { |
| // to be implemented... |
| } |
| |
| private static byte[] decodeAndMark(byte[] bytes) throws IOException { |
| ByteBuffer bb = decodeBin(bytes); |
| BufferedImage bi = ImageIO.read(new ByteArrayInputStream(bb.array())); |
| watermark(bi); |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| ImageIO.write(bi, PNG, baos); |
| return baos.toByteArray(); |
| } |
| |
| @Path("{resource}") |
| @GET |
| @Produces("image/png") |
| public Response getBinResource(@PathParam("resource") String resource) |
| throws IOException { |
| |
| String path = ROOT + resource; |
| InputStream is = getClass().getClassLoader().getResourceAsStream(path); |
| |
| if (is == null) { |
| log.warn("Didn't find resource {}", path); |
| return Response.status(Response.Status.NOT_FOUND).build(); |
| } |
| |
| byte[] bytes = ByteStreams.toByteArray(is); |
| log.info("Processing resource {} ({} bytes)", path, bytes.length); |
| return Response.ok(decodeAndMark(bytes)).build(); |
| } |
| } |