/*
* Copyright 2013 the original author or authors.
*
* 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 ratpack.file.internal;
import com.google.common.collect.ImmutableList;
import ratpack.handling.Context;
import ratpack.handling.Handler;
import ratpack.http.Request;
import ratpack.path.PathBinding;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.Path;
import static ratpack.file.internal.DefaultFileRenderer.readAttributes;
import static ratpack.file.internal.DefaultFileRenderer.sendFile;
import static ratpack.util.ExceptionUtils.uncheck;
public class AssetHandler implements Handler {
private final ImmutableList<String> indexFiles;
public AssetHandler(ImmutableList<String> indexFiles) {
this.indexFiles = indexFiles;
}
public void handle(Context context) throws Exception {
Request request = context.getRequest();
String path = context.maybeGet(PathBinding.class)
.map(PathBinding::getPastBinding)
.orElse(request.getPath());
// Decode the path.
try {
path = new URI(path).getPath();
} catch (URISyntaxException e) {
throw uncheck(e);
}
Path asset = context.file(path);
if (asset != null) {
servePath(context, asset);
} else {
context.clientError(404);
}
}
private void servePath(final Context context, final Path file) throws Exception {
readAttributes(context, file, attributes -> {
if (attributes == null) {
context.next();
} else if (attributes.isRegularFile()) {
sendFile(context, file, attributes);
} else if (attributes.isDirectory()) {
maybeSendFile(context, file, 0);
} else {
context.next();
}
});
}
private void maybeSendFile(final Context context, final Path file, final int i) throws Exception {
if (i == indexFiles.size()) {
context.next();
} else {
String name = indexFiles.get(i);
final Path indexFile = file.resolve(name);
readAttributes(context, indexFile, attributes -> {
if (attributes != null && attributes.isRegularFile()) {
String path = context.getRequest().getPath();
if (path.endsWith("/") || path.isEmpty()) {
sendFile(context, indexFile, attributes);
} else {
context.redirect(currentUriWithTrailingSlash(context));
}
} else {
maybeSendFile(context, file, i + 1);
}
});
}
}
private String currentUriWithTrailingSlash(Context context) {
Request request = context.getRequest();
String redirectUri = "/" + request.getPath() + "/";
String query = request.getQuery();
if (!query.isEmpty()) {
redirectUri += "?" + query;
}
return redirectUri;
}
}