/**
* 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.jooby.internal;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Optional;
import java.util.function.Consumer;
import org.jooby.Err;
import org.jooby.MediaType;
import org.jooby.Renderer;
import org.jooby.Renderer.Context;
import org.jooby.Status;
import org.jooby.spi.NativeResponse;
import com.google.common.io.ByteStreams;
import javaslang.Tuple;
import javaslang.Tuple2;
public class HttpRendererContext extends AbstractRendererContext {
private Consumer<Long> length;
private Consumer<MediaType> type;
private NativeResponse rsp;
private Optional<String> byteRange;
public HttpRendererContext(final List<Renderer> renderers,
final NativeResponse rsp, final Consumer<Long> len, final Consumer<MediaType> type,
final Map<String, Object> locals, final List<MediaType> produces, final Charset charset,
final Locale locale, final Optional<String> byteRange) {
super(renderers, produces, charset, locale, locals);
this.byteRange = byteRange;
this.rsp = rsp;
this.length = len;
this.type = type;
}
@Override
public Context length(final long length) {
this.length.accept(length);
return this;
}
@Override
public Context type(final MediaType type) {
this.type.accept(type);
return this;
}
@Override
protected void _send(final ByteBuffer buffer) throws Exception {
rsp.send(buffer);
}
@Override
protected void _send(final byte[] bytes) throws Exception {
rsp.send(bytes);
}
@Override
protected void _send(final FileChannel file) throws Exception {
Tuple2<Long, Long> byteRange = byteRange();
if (byteRange == null) {
rsp.send(file);
} else {
rsp.send(file, byteRange._1, byteRange._2);
}
}
@Override
protected void _send(final InputStream stream) throws Exception {
Tuple2<Long, Long> byteRange = byteRange();
if (byteRange == null) {
rsp.send(stream);
} else {
stream.skip(byteRange._1);
rsp.send(ByteStreams.limit(stream, byteRange._2));
}
}
private <T> Tuple2<Long, Long> byteRange() {
long len = rsp.header("Content-Length").map(Long::parseLong).orElse(-1L);
if (len > 0) {
if (byteRange.isPresent()) {
String raw = byteRange.get();
Tuple2<Long, Long> range = ByteRange.parse(raw);
long start = range._1;
long end = range._2;
if (start == -1) {
start = len - end;
end = len - 1;
}
if (end == -1 || end > len - 1) {
end = len - 1;
}
if (start > end) {
throw new Err(Status.REQUESTED_RANGE_NOT_SATISFIABLE, raw);
}
// offset
long limit = (end - start + 1);
rsp.header("Accept-Ranges", "bytes");
rsp.header("Content-Range", "bytes " + start + "-" + end + "/" + len);
rsp.header("Content-Length", Long.toString(limit));
rsp.statusCode(Status.PARTIAL_CONTENT.value());
return Tuple.of(start, limit);
}
}
return null;
}
}