/**
* 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.netty;
import java.util.Map;
import org.jooby.spi.NativePushPromise;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.DefaultHttpHeaders;
import io.netty.handler.codec.http.EmptyHttpHeaders;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.handler.codec.http2.DefaultHttp2Headers;
import io.netty.handler.codec.http2.Http2Connection;
import io.netty.handler.codec.http2.Http2ConnectionEncoder;
import io.netty.handler.codec.http2.Http2Headers;
import io.netty.handler.codec.http2.HttpConversionUtil;
import io.netty.handler.codec.http2.HttpToHttp2ConnectionHandler;
import io.netty.util.AsciiString;
public class NettyPush implements NativePushPromise {
private ChannelHandlerContext ctx;
private Http2ConnectionEncoder encoder;
private int streamId;
private String authority;
private String scheme;
public NettyPush(final ChannelHandlerContext ctx, final int streamId, final String authority,
final String scheme) {
this.ctx = ctx;
HttpToHttp2ConnectionHandler handler = ctx.pipeline().get(HttpToHttp2ConnectionHandler.class);
this.encoder = handler.encoder();
this.streamId = streamId;
this.authority = authority;
this.scheme = scheme;
}
@Override
public void push(final String method, final String path, final Map<String, Object> headers) {
ctx.channel().eventLoop().execute(() -> {
AsciiString streamIdHeader = HttpConversionUtil.ExtensionHeaderNames.STREAM_ID.text();
Http2Connection connection = encoder.connection();
int nextStreamId = connection.local().incrementAndGetNextStreamId();
Http2Headers h2headers = new DefaultHttp2Headers()
.path(path)
.method(method)
.authority(authority)
.scheme(scheme);
headers.forEach((n, v) -> h2headers.add(n, v.toString()));
encoder.writePushPromise(ctx, streamId, nextStreamId, h2headers, 0, ctx.newPromise());
// TODO: Is there another way of handling a push promise?
DefaultFullHttpRequest pushRequest = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1,
HttpMethod.valueOf(method.toUpperCase()), path, Unpooled.EMPTY_BUFFER,
new DefaultHttpHeaders(false).set(streamIdHeader, nextStreamId),
EmptyHttpHeaders.INSTANCE);
ctx.pipeline().fireChannelRead(pushRequest);
ctx.pipeline().fireChannelReadComplete();
});
}
}