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Merge buffers for performance reasons if possible when encode http requests/responses.

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This commit is contained in:
Norman Maurer 2013-11-28 12:27:35 +01:00
parent 387f6917af
commit dab954dfb5
1 changed files with 26 additions and 6 deletions
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24
codec-http/src/main/java/io/netty/handler/codec/http/HttpObjectEncoder.java
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@ -57,6 +57,7 @@ public abstract class HttpObjectEncoder<H extends HttpMessage> extends MessageTo
@Override
protected void encode(ChannelHandlerContext ctx, Object msg, List<Object> out) throws Exception {
ByteBuf buf = null;
if (msg instanceof HttpMessage) {
if (state != ST_INIT) {
throw new IllegalStateException("unexpected message type: " + StringUtil.simpleClassName(msg));
@ -65,12 +66,11 @@ public abstract class HttpObjectEncoder<H extends HttpMessage> extends MessageTo
@SuppressWarnings({ "unchecked", "CastConflictsWithInstanceof" })
H m = (H) msg;
ByteBuf buf = ctx.alloc().buffer();
buf = ctx.alloc().buffer();
// Encode the message.
encodeInitialLine(buf, m);
HttpHeaders.encode(m.headers(), buf);
buf.writeBytes(CRLF);
out.add(buf);
state = HttpHeaders.isTransferEncodingChunked(m) ? ST_CONTENT_CHUNK : ST_CONTENT_NON_CHUNK;
}
if (msg instanceof HttpContent || msg instanceof ByteBuf || msg instanceof FileRegion) {
@ -81,21 +81,41 @@ public abstract class HttpObjectEncoder<H extends HttpMessage> extends MessageTo
int contentLength = contentLength(msg);
if (state == ST_CONTENT_NON_CHUNK) {
if (contentLength > 0) {
if (buf != null && buf.writableBytes() >= contentLength && msg instanceof HttpContent) {
// merge into other buffer for performance reasons
buf.writeBytes(((HttpContent) msg).content());
out.add(buf);
} else {
if (buf != null) {
out.add(buf);
}
out.add(encodeAndRetain(msg));
}
} else {
if (buf != null) {
out.add(buf);
} else {
// Need to produce some output otherwise an
// IllegalStateException will be thrown
out.add(EMPTY_BUFFER);
}
}
if (msg instanceof LastHttpContent) {
state = ST_INIT;
}
} else if (state == ST_CONTENT_CHUNK) {
if (buf != null) {
out.add(buf);
}
encodeChunkedContent(ctx, msg, contentLength, out);
} else {
throw new Error();
}
} else {
if (buf != null) {
out.add(buf);
}
}
}