| /* |
| * Copyright 2015 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.collect.ImmutableList; |
| import org.onosproject.ui.UiExtension; |
| import org.onosproject.ui.UiExtensionService; |
| |
| import javax.ws.rs.GET; |
| import javax.ws.rs.Path; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.Response; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.SequenceInputStream; |
| |
| import static com.google.common.collect.ImmutableList.of; |
| import static com.google.common.io.ByteStreams.toByteArray; |
| |
| /** |
| * Resource for serving the dynamically composed index.html. |
| */ |
| @Path("/") |
| public class MainIndexResource extends AbstractInjectionResource { |
| |
| private static final String INDEX = "/index-template.html"; |
| |
| private static final String INJECT_CSS = "<!-- {INJECTED-STYLESHEETS} -->"; |
| private static final String INJECT_JS = "<!-- {INJECTED-JAVASCRIPT} -->"; |
| |
| @Path("/") |
| @GET |
| @Produces(MediaType.TEXT_HTML) |
| public Response getMainIndex() throws IOException { |
| UiExtensionService service = get(UiExtensionService.class); |
| InputStream indexTemplate = getClass().getClassLoader().getResourceAsStream(INDEX); |
| String index = new String(toByteArray(indexTemplate)); |
| |
| int p1 = split(index, 0, INJECT_JS); |
| int p2 = split(index, p1, INJECT_CSS); |
| int p3 = split(index, p2, null); |
| |
| StreamEnumeration streams = |
| new StreamEnumeration(of(stream(index, 0, p1), |
| includeJs(service), |
| stream(index, p1, p2), |
| includeCss(service), |
| stream(index, p2, p3))); |
| |
| return Response.ok(new SequenceInputStream(streams)).build(); |
| } |
| |
| // Produces an input stream including CSS injections from all extensions. |
| private InputStream includeCss(UiExtensionService service) { |
| ImmutableList.Builder<InputStream> builder = ImmutableList.builder(); |
| for (UiExtension extension : service.getExtensions()) { |
| builder.add(extension.css()); |
| } |
| return new SequenceInputStream(new StreamEnumeration(builder.build())); |
| } |
| |
| // Produces an input stream including JS injections from all extensions. |
| private InputStream includeJs(UiExtensionService service) { |
| ImmutableList.Builder<InputStream> builder = ImmutableList.builder(); |
| for (UiExtension extension : service.getExtensions()) { |
| builder.add(extension.js()); |
| } |
| return new SequenceInputStream(new StreamEnumeration(builder.build())); |
| } |
| |
| } |