93 lines
3.8 KiB
Java
93 lines
3.8 KiB
Java
package ru.gravit.launchserver.socket.websocket;
|
|
|
|
import static io.netty.handler.codec.http.HttpMethod.GET;
|
|
import static io.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
|
|
import static io.netty.handler.codec.http.HttpResponseStatus.FORBIDDEN;
|
|
import static io.netty.handler.codec.http.HttpResponseStatus.OK;
|
|
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
|
|
import static io.netty.handler.codec.rtsp.RtspResponseStatuses.NOT_FOUND;
|
|
|
|
import io.netty.buffer.ByteBuf;
|
|
import io.netty.buffer.Unpooled;
|
|
import io.netty.channel.ChannelFuture;
|
|
import io.netty.channel.ChannelFutureListener;
|
|
import io.netty.channel.ChannelHandlerContext;
|
|
import io.netty.channel.ChannelPipeline;
|
|
import io.netty.channel.SimpleChannelInboundHandler;
|
|
import io.netty.handler.codec.http.DefaultFullHttpResponse;
|
|
import io.netty.handler.codec.http.FullHttpRequest;
|
|
import io.netty.handler.codec.http.FullHttpResponse;
|
|
import io.netty.handler.codec.http.HttpHeaderNames;
|
|
import io.netty.handler.codec.http.HttpRequest;
|
|
import io.netty.handler.codec.http.HttpUtil;
|
|
import io.netty.handler.ssl.SslHandler;
|
|
import io.netty.util.CharsetUtil;
|
|
|
|
public class WebSocketIndexPageHandler extends SimpleChannelInboundHandler<FullHttpRequest> {
|
|
|
|
private final String websocketPath;
|
|
|
|
public WebSocketIndexPageHandler(String websocketPath) {
|
|
this.websocketPath = websocketPath;
|
|
}
|
|
|
|
@Override
|
|
protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) {
|
|
// Handle a bad request.
|
|
if (!req.decoderResult().isSuccess()) {
|
|
sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, BAD_REQUEST));
|
|
return;
|
|
}
|
|
|
|
// Allow only GET methods.
|
|
if (req.method() != GET) {
|
|
sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, FORBIDDEN));
|
|
return;
|
|
}
|
|
|
|
// Send the index page
|
|
if ("/".equals(req.uri()) || "/index.html".equals(req.uri())) {
|
|
String webSocketLocation = getWebSocketLocation(ctx.pipeline(), req, websocketPath);
|
|
ByteBuf content = WebSocketServerIndexPage.getContent(webSocketLocation);
|
|
FullHttpResponse res = new DefaultFullHttpResponse(HTTP_1_1, OK, content);
|
|
|
|
res.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8");
|
|
HttpUtil.setContentLength(res, content.readableBytes());
|
|
|
|
sendHttpResponse(ctx, req, res);
|
|
} else {
|
|
sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, NOT_FOUND));
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
|
|
cause.printStackTrace();
|
|
ctx.close();
|
|
}
|
|
|
|
private static void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
|
|
// Generate an error page if response getStatus code is not OK (200).
|
|
if (res.status().code() != 200) {
|
|
ByteBuf buf = Unpooled.copiedBuffer(res.status().toString(), CharsetUtil.UTF_8);
|
|
res.content().writeBytes(buf);
|
|
buf.release();
|
|
HttpUtil.setContentLength(res, res.content().readableBytes());
|
|
}
|
|
|
|
// Send the response and close the connection if necessary.
|
|
ChannelFuture f = ctx.channel().writeAndFlush(res);
|
|
if (!HttpUtil.isKeepAlive(req) || res.status().code() != 200) {
|
|
f.addListener(ChannelFutureListener.CLOSE);
|
|
}
|
|
}
|
|
|
|
private static String getWebSocketLocation(ChannelPipeline cp, HttpRequest req, String path) {
|
|
String protocol = "ws";
|
|
if (cp.get(SslHandler.class) != null) {
|
|
// SSL in use so use Secure WebSockets
|
|
protocol = "wss";
|
|
}
|
|
return protocol + "://" + req.headers().get(HttpHeaderNames.HOST) + path;
|
|
}
|
|
} |