@Override
public Object encode(ChannelHandlerContext ctx, Object msg) throws Exception {
List<Object> out = new ArrayList<Object>();
if (msg instanceof HttpRequest) {
HttpRequest httpRequest = (HttpRequest) msg;
SpdySynStreamFrame spdySynStreamFrame = createSynStreamFrame(httpRequest);
int streamID = spdySynStreamFrame.getStreamID();
out.add(spdySynStreamFrame);
addContent(out, streamID, httpRequest);
} else if (msg instanceof HttpResponse) {
HttpResponse httpResponse = (HttpResponse) msg;
if (httpResponse.containsHeader(SpdyHttpHeaders.Names.ASSOCIATED_TO_STREAM_ID)) {
SpdySynStreamFrame spdySynStreamFrame = createSynStreamFrame(httpResponse);
int streamID = spdySynStreamFrame.getStreamID();
out.add(spdySynStreamFrame);
addContent(out, streamID, httpResponse);
} else {
SpdySynReplyFrame spdySynReplyFrame = createSynReplyFrame(httpResponse);
int streamID = spdySynReplyFrame.getStreamID();
out.add(spdySynReplyFrame);
addContent(out, streamID, httpResponse);
}
} else if (msg instanceof HttpChunk) {
HttpChunk chunk = (HttpChunk) msg;
SpdyDataFrame spdyDataFrame = new DefaultSpdyDataFrame(currentStreamID);
spdyDataFrame.setData(chunk.getContent());
spdyDataFrame.setLast(chunk.isLast());
if (chunk instanceof HttpChunkTrailer) {
HttpChunkTrailer trailer = (HttpChunkTrailer) chunk;
List<Map.Entry<String, String>> trailers = trailer.getHeaders();
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.addHeader(entry.getKey(), entry.getValue());
}
// Write HEADERS frame and append Data Frame
out.add(spdyHeadersFrame);
out.add(spdyDataFrame);
}
} else {
out.add(spdyDataFrame);
}
} else {
throw new UnsupportedMessageTypeException(msg);
}
return out.toArray();
}
private static void addContent(List<Object> out, int streamID, HttpMessage httpMessage) {
if (!httpMessage.getContent().readable()) {
return;
}
// Create SPDY Data Frame out of message content
SpdyDataFrame spdyDataFrame = new DefaultSpdyDataFrame(streamID);
spdyDataFrame.setData(httpMessage.getContent());
spdyDataFrame.setLast(true);
out.add(spdyDataFrame);
}
