NettyHttpServerHandler.java
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package com.genersoft.iot.vmp.jtt1078.http;
import com.genersoft.iot.vmp.jtt1078.entity.Media;
import com.genersoft.iot.vmp.jtt1078.publisher.PublishManager;
import com.genersoft.iot.vmp.jtt1078.server.Session;
import com.genersoft.iot.vmp.jtt1078.util.*;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.codec.http.*;
import io.netty.util.Attribute;
import io.netty.util.AttributeKey;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Created by matrixy on 2019/8/13.
*/
public class NettyHttpServerHandler extends ChannelInboundHandlerAdapter
{
static Logger logger = LoggerFactory.getLogger(NettyHttpServerHandler.class);
static final byte[] HTTP_403_DATA = "<h1>403 Forbidden</h1><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding--><!--padding-->".getBytes();
static final String HEADER_ENCODING = "ISO-8859-1";
private static final AttributeKey<Session> SESSION_KEY = AttributeKey.valueOf("session");
@Override
public void channelRead(final ChannelHandlerContext ctx, Object msg) throws Exception
{
FullHttpRequest fhr = (FullHttpRequest) msg;
String uri = fhr.uri();
QueryStringDecoder decoder = new QueryStringDecoder(uri);
String path = decoder.path();
String origin = fhr.headers().get("Origin");
Packet resp = Packet.create(1024);
// uri的第二段，就是通道标签
if (path.startsWith("/video/"))
{
String tag = path.substring("/video/".length());
resp.addBytes("HTTP/1.1 200 OK\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Connection: keep-alive\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Content-Type: video/x-flv\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Transfer-Encoding: chunked\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Cache-Control: no-cache\r\n".getBytes(HEADER_ENCODING));
if (origin != null) {
resp.addBytes(("Access-Control-Allow-Origin: " + origin + "\r\n").getBytes(HEADER_ENCODING));
resp.addBytes("Access-Control-Allow-Credentials: true\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Vary: Origin\r\n".getBytes(HEADER_ENCODING));
} else {
resp.addBytes("Access-Control-Allow-Origin: *\r\n".getBytes(HEADER_ENCODING));
}
resp.addBytes("Access-Control-Allow-Methods: GET, OPTIONS\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Access-Control-Allow-Headers: *\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("\r\n".getBytes(HEADER_ENCODING));
ctx.writeAndFlush(resp.getBytes()).await();
// 订阅视频数据
long wid = PublishManager.getInstance().subscribe(tag, Media.Type.Video, ctx).getId();
setSession(ctx, new Session().set("subscriber-id", wid).set("tag", tag));
logger.info("[HTTP_SUBSCRIBE] video tag={}, watcher={}, uri={}", tag, wid, uri);
}
else if (path.startsWith("/audio/"))
{
String tag = path.substring("/audio/".length());
resp.addBytes("HTTP/1.1 200 OK\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Connection: keep-alive\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Content-Type: video/x-flv\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Transfer-Encoding: chunked\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Cache-Control: no-cache\r\n".getBytes(HEADER_ENCODING));
if (origin != null) {
resp.addBytes(("Access-Control-Allow-Origin: " + origin + "\r\n").getBytes(HEADER_ENCODING));
resp.addBytes("Access-Control-Allow-Credentials: true\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Vary: Origin\r\n".getBytes(HEADER_ENCODING));
} else {
resp.addBytes("Access-Control-Allow-Origin: *\r\n".getBytes(HEADER_ENCODING));
}
resp.addBytes("Access-Control-Allow-Methods: GET, OPTIONS\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("Access-Control-Allow-Headers: *\r\n".getBytes(HEADER_ENCODING));
resp.addBytes("\r\n".getBytes(HEADER_ENCODING));
ctx.writeAndFlush(resp.getBytes()).await();
long wid = PublishManager.getInstance().subscribe(tag, Media.Type.Audio, ctx).getId();
setSession(ctx, new Session().set("subscriber-id", wid).set("tag", tag));
logger.info("[HTTP_SUBSCRIBE] audio tag={}, watcher={}, uri={}", tag, wid, uri);
}
else if (uri.equals("/test/multimedia"))
{
responseHTMLFile("/multimedia.html", ctx);
}
else
{
ByteBuf body = Unpooled.buffer(HTTP_403_DATA.length);
body.writeBytes(HTTP_403_DATA);
FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.valueOf(403), body);
response.headers().add("Content-Length", HTTP_403_DATA.length);
ctx.writeAndFlush(response).await();
ctx.flush();
}
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception
{
super.channelInactive(ctx);
Session session = getSession(ctx);
if (session != null && session.has("subscriber-id") && session.has("tag"))
{
String tag = session.get("tag");
Long wid = session.get("subscriber-id");
PublishManager.getInstance().unsubscribe(tag, wid);
logger.info("[HTTP_SUBSCRIBE] unsubscribe tag={}, watcher={}", tag, wid);
}
}
// 响应静态文件内容
private void responseHTMLFile(String htmlFilePath, ChannelHandlerContext ctx)
{
byte[] fileData = FileUtils.read(NettyHttpServerHandler.class.getResourceAsStream(htmlFilePath));
ByteBuf body = Unpooled.buffer(fileData.length);
body.writeBytes(fileData);
FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.valueOf(200), body);
response.headers().add("Content-Length", fileData.length);
ctx.write(response);
ctx.flush();
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) throws Exception
{
ctx.flush();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception
{
ctx.close();
cause.printStackTrace();
}
public final void setSession(ChannelHandlerContext context, Session session)
{
context.channel().attr(SESSION_KEY).set(session);
}
public final Session getSession(ChannelHandlerContext context)
{
Attribute<Session> attr = context.channel().attr(SESSION_KEY);
if (null == attr) return null;
else return attr.get();
}
}