/**
* Writes response metadata to the channel if not already written previously and channel is
* active.
*
* @param responseMetadata the {@link HttpResponse} that needs to be written.
* @param listener the {@link GenericFutureListener} that needs to be attached to the write.
* @return {@code true} if response metadata was written to the channel in this call. {@code
* false} otherwise.
*/
private boolean maybeWriteResponseMetadata(
HttpResponse responseMetadata, GenericFutureListener<ChannelFuture> listener) {
long writeProcessingStartTime = System.currentTimeMillis();
boolean writtenThisTime = false;
if (responseMetadataWritten.compareAndSet(false, true)) {
// we do some manipulation here for chunking. According to the HTTP spec, we can have either a
// Content-Length
// or Transfer-Encoding:chunked, never both. So we check for Content-Length - if it is not
// there, we add
// Transfer-Encoding:chunked. Note that sending HttpContent chunks data anyway - we are just
// explicitly specifying
// this in the header.
if (!HttpHeaders.isContentLengthSet(responseMetadata)) {
// This makes sure that we don't stomp on any existing transfer-encoding.
HttpHeaders.setTransferEncodingChunked(responseMetadata);
}
logger.trace(
"Sending response with status {} on channel {}",
responseMetadata.getStatus(),
ctx.channel());
ChannelPromise writePromise = ctx.newPromise().addListener(listener);
ctx.writeAndFlush(responseMetadata, writePromise);
writtenThisTime = true;
long writeProcessingTime = System.currentTimeMillis() - writeProcessingStartTime;
nettyMetrics.responseMetadataProcessingTimeInMs.update(writeProcessingTime);
}
return writtenThisTime;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
logger.debug("================进入客户端InBoundHandler channelRead============");
// 如果是response
if (msg instanceof HttpResponse) {
HttpResponse response = (HttpResponse) msg;
logger.debug(
"客户端收到的响应CONTENT_TYPE:" + response.headers().get(HttpHeaders.Names.CONTENT_TYPE));
if (HttpHeaders.isContentLengthSet(response)) {
reader = new ByteBufToBytes((int) HttpHeaders.getContentLength(response));
}
}
if (msg instanceof HttpContent) {
HttpContent httpContent = (HttpContent) msg;
ByteBuf content = httpContent.content();
reader.reading(content);
content.release();
if (reader.isEnd()) {
String resultStr = new String(reader.readFull());
logger.debug("收到的服务端的消息是：" + resultStr);
ctx.close();
}
}
logger.debug("================出客户端InBoundHandler channelRead============");
}