package com.firefly.server.http2; import com.firefly.codec.http2.decode.ServerParser; import com.firefly.codec.http2.encode.Generator; import com.firefly.codec.http2.frame.*; import com.firefly.codec.http2.model.MetaData; import com.firefly.codec.http2.stream.*; import com.firefly.utils.concurrent.Callback; import com.firefly.utils.concurrent.Scheduler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Collections; import java.util.Map; public class HTTP2ServerSession extends HTTP2Session implements ServerParser.Listener { private static Logger log = LoggerFactory.getLogger("firefly-system"); private final ServerSessionListener listener; public HTTP2ServerSession(Scheduler scheduler, com.firefly.net.Session endPoint, Generator generator, ServerSessionListener listener, FlowControlStrategy flowControl, int streamIdleTimeout) { super(scheduler, endPoint, generator, listener, flowControl, 2, streamIdleTimeout); this.listener = listener; } @Override public void onPreface() { // SPEC: send a SETTINGS frame upon receiving the preface. Map<Integer, Integer> settings = notifyPreface(this); if (settings == null) settings = Collections.emptyMap(); SettingsFrame settingsFrame = new SettingsFrame(settings, false); WindowUpdateFrame windowFrame = null; int sessionWindow = getInitialSessionRecvWindow() - FlowControlStrategy.DEFAULT_WINDOW_SIZE; if (sessionWindow > 0) { updateRecvWindow(sessionWindow); windowFrame = new WindowUpdateFrame(0, sessionWindow); } if (windowFrame == null) frames(null, Callback.NOOP, settingsFrame, Frame.EMPTY_ARRAY); else frames(null, Callback.NOOP, settingsFrame, windowFrame); } @Override public void onHeaders(HeadersFrame frame) { if (log.isDebugEnabled()) log.debug("Received {}", frame); MetaData metaData = frame.getMetaData(); if (metaData.isRequest()) { StreamSPI stream = createRemoteStream(frame.getStreamId()); if (stream != null) { stream.process(frame, Callback.NOOP); Stream.Listener listener = notifyNewStream(stream, frame); stream.setListener(listener); } } else { onConnectionFailure(ErrorCode.INTERNAL_ERROR.code, "invalid_request"); } } @Override public void onPushPromise(PushPromiseFrame frame) { onConnectionFailure(ErrorCode.PROTOCOL_ERROR.code, "push_promise"); } private Map<Integer, Integer> notifyPreface(Session session) { try { return listener.onPreface(session); } catch (Throwable x) { log.error("Failure while notifying listener {}", x, listener); return null; } } @Override public void onFrame(Frame frame) { switch (frame.getType()) { case PREFACE: onPreface(); break; case SETTINGS: // SPEC: the required reply to this SETTINGS frame is the 101 // response. onSettings((SettingsFrame) frame, false); break; case HEADERS: onHeaders((HeadersFrame) frame); break; default: super.onFrame(frame); break; } } }