@SuppressWarnings("deprecation")
private SpdySynStreamFrame createSynStreamFrame(HttpMessage httpMessage) throws Exception {
// Get the Stream-ID, Associated-To-Stream-ID, Priority, URL, and scheme from the headers
final HttpHeaders httpHeaders = httpMessage.headers();
int streamID = httpHeaders.getInt(Names.STREAM_ID);
int associatedToStreamId = httpHeaders.getInt(Names.ASSOCIATED_TO_STREAM_ID, 0);
byte priority = (byte) httpHeaders.getInt(Names.PRIORITY, 0);
String URL = httpHeaders.get(Names.URL);
String scheme = httpHeaders.get(Names.SCHEME);
httpHeaders.remove(Names.STREAM_ID);
httpHeaders.remove(Names.ASSOCIATED_TO_STREAM_ID);
httpHeaders.remove(Names.PRIORITY);
httpHeaders.remove(Names.URL);
httpHeaders.remove(Names.SCHEME);
// The Connection, Keep-Alive, Proxy-Connection, and Transfer-Encoding
// headers are not valid and MUST not be sent.
httpHeaders.remove(HttpHeaders.Names.CONNECTION);
httpHeaders.remove(HttpHeaders.Names.KEEP_ALIVE);
httpHeaders.remove(HttpHeaders.Names.PROXY_CONNECTION);
httpHeaders.remove(HttpHeaders.Names.TRANSFER_ENCODING);
SpdySynStreamFrame spdySynStreamFrame =
new DefaultSpdySynStreamFrame(streamID, associatedToStreamId, priority);
// Unfold the first line of the message into name/value pairs
SpdyHeaders frameHeaders = spdySynStreamFrame.headers();
if (httpMessage instanceof FullHttpRequest) {
HttpRequest httpRequest = (HttpRequest) httpMessage;
frameHeaders.set(METHOD, httpRequest.method());
frameHeaders.set(PATH, httpRequest.uri());
frameHeaders.set(VERSION, httpMessage.protocolVersion());
}
if (httpMessage instanceof HttpResponse) {
HttpResponse httpResponse = (HttpResponse) httpMessage;
frameHeaders.set(STATUS, httpResponse.status());
frameHeaders.set(PATH, URL);
frameHeaders.set(VERSION, httpMessage.protocolVersion());
spdySynStreamFrame.setUnidirectional(true);
}
// Replace the HTTP host header with the SPDY host header
if (spdyVersion >= 3) {
CharSequence host = httpHeaders.getUnconverted(HttpHeaders.Names.HOST);
httpHeaders.remove(HttpHeaders.Names.HOST);
frameHeaders.set(HOST, host);
}
// Set the SPDY scheme header
if (scheme == null) {
scheme = "https";
}
frameHeaders.set(SCHEME, scheme);
// Transfer the remaining HTTP headers
for (Map.Entry<String, String> entry : httpHeaders) {
frameHeaders.add(entry.getKey(), entry.getValue());
}
currentStreamId = spdySynStreamFrame.streamId();
spdySynStreamFrame.setLast(isLast(httpMessage));
return spdySynStreamFrame;
}
@Override
protected void encode(ChannelHandlerContext ctx, HttpObject msg, List<Object> out)
throws Exception {
boolean valid = false;
boolean last = false;
if (msg instanceof HttpRequest) {
HttpRequest httpRequest = (HttpRequest) msg;
SpdySynStreamFrame spdySynStreamFrame = createSynStreamFrame(httpRequest);
out.add(spdySynStreamFrame);
last = spdySynStreamFrame.isLast();
valid = true;
}
if (msg instanceof HttpResponse) {
HttpResponse httpResponse = (HttpResponse) msg;
if (httpResponse.headers().contains(SpdyHttpHeaders.Names.ASSOCIATED_TO_STREAM_ID)) {
SpdySynStreamFrame spdySynStreamFrame = createSynStreamFrame(httpResponse);
last = spdySynStreamFrame.isLast();
out.add(spdySynStreamFrame);
} else {
SpdySynReplyFrame spdySynReplyFrame = createSynReplyFrame(httpResponse);
last = spdySynReplyFrame.isLast();
out.add(spdySynReplyFrame);
}
valid = true;
}
if (msg instanceof HttpContent && !last) {
HttpContent chunk = (HttpContent) msg;
chunk.content().retain();
SpdyDataFrame spdyDataFrame = new DefaultSpdyDataFrame(currentStreamId, chunk.content());
spdyDataFrame.setLast(chunk instanceof LastHttpContent);
if (chunk instanceof LastHttpContent) {
LastHttpContent trailer = (LastHttpContent) chunk;
HttpHeaders trailers = trailer.trailingHeaders();
if (trailers.isEmpty()) {
out.add(spdyDataFrame);
} else {
// Create SPDY HEADERS frame out of trailers
SpdyHeadersFrame spdyHeadersFrame = new DefaultSpdyHeadersFrame(currentStreamId);
for (Map.Entry<String, String> entry : trailers) {
spdyHeadersFrame.headers().add(entry.getKey(), entry.getValue());
}
// Write HEADERS frame and append Data Frame
out.add(spdyHeadersFrame);
out.add(spdyDataFrame);
}
} else {
out.add(spdyDataFrame);
}
valid = true;
}
if (!valid) {
throw new UnsupportedMessageTypeException(msg);
}
}