fix #293 support expect 100-continue

HttpServerHandler now write informational response separately. In order to fully work the fix correctly defers header sending on subscribe. This can give precedence to the expect100Continue logic in receiveObject()
reactor · Feb 27, 2018 · ebb721c · ebb721c
1 parent 7b1f0c6
commit ebb721c
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Showing 4 changed files with 88 additions and 41 deletions.
diff --git a/src/main/java/reactor/ipc/netty/http/HttpOperations.java b/src/main/java/reactor/ipc/netty/http/HttpOperations.java
@@ -100,57 +100,63 @@ public boolean isWebsocket() {
 	//@Override
 	//TODO document this
 	public NettyOutbound sendHeaders() {
-		if (markSentHeaders()) {
-			if (HttpUtil.isContentLengthSet(outboundHttpMessage())) {
-				outboundHttpMessage().headers()
-				                     .remove(HttpHeaderNames.TRANSFER_ENCODING);
-			}
+		if (hasSentHeaders()) {
+			return this;
+		}
 
-			HttpMessage message;
-			if (!HttpUtil.isTransferEncodingChunked(outboundHttpMessage())
-					&& (!HttpUtil.isContentLengthSet(outboundHttpMessage()) ||
-			HttpUtil.getContentLength(outboundHttpMessage(), 0) == 0)) {
-				if(isKeepAlive() && markSentBody()){
-					message = newFullEmptyBodyMessage();
+		return then(FutureMono.deferFuture(() -> {
+			if (markSentHeaders()) {
+				if (HttpUtil.isContentLengthSet(outboundHttpMessage())) {
+					outboundHttpMessage().headers()
+					                     .remove(HttpHeaderNames.TRANSFER_ENCODING);
+				}
+
+				HttpMessage message;
+				if (!HttpUtil.isTransferEncodingChunked(outboundHttpMessage())
+						&& (!HttpUtil.isContentLengthSet(outboundHttpMessage()) ||
+						HttpUtil.getContentLength(outboundHttpMessage(), 0) == 0)) {
+					if(isKeepAlive() && markSentBody()){
+						message = newFullEmptyBodyMessage();
+					}
+					else {
+						markPersistent(false);
+						message = outboundHttpMessage();
+					}
 				}
 				else {
-					markPersistent(false);
 					message = outboundHttpMessage();
 				}
+				return channel().writeAndFlush(message);
 			}
 			else {
-				message = outboundHttpMessage();
+				return channel().newSucceededFuture();
 			}
-			return then(FutureMono.deferFuture(() -> {
-				if(!channel().isActive()){
-					throw new AbortedException();
-				}
-				return channel().writeAndFlush(message);
-			}));
-		}
-		else {
-			return this;
-		}
+		}));
 	}
 
 	@Override
 	public Mono<Void> then() {
-		if (markSentHeaders()) {
-			if (HttpUtil.isContentLengthSet(outboundHttpMessage())) {
-				outboundHttpMessage().headers()
-				                     .remove(HttpHeaderNames.TRANSFER_ENCODING);
-			}
-
-			if (!HttpUtil.isTransferEncodingChunked(outboundHttpMessage())
-					&& !HttpUtil.isContentLengthSet(outboundHttpMessage())) {
-				markPersistent(false);
-			}
-
-			return FutureMono.deferFuture(() -> channel().writeAndFlush(outboundHttpMessage()));
-		}
-		else {
+		if (hasSentHeaders()) {
 			return Mono.empty();
 		}
+
+		return FutureMono.deferFuture(() -> {
+			if (markSentHeaders()) {
+				if (HttpUtil.isContentLengthSet(outboundHttpMessage())) {
+					outboundHttpMessage().headers()
+					                     .remove(HttpHeaderNames.TRANSFER_ENCODING);
+				}
+
+				if (!HttpUtil.isTransferEncodingChunked(outboundHttpMessage()) && !HttpUtil.isContentLengthSet(
+						outboundHttpMessage())) {
+					markPersistent(false);
+				}
+				return channel().writeAndFlush(outboundHttpMessage());
+			}
+			else {
+				return channel().newSucceededFuture();
+			}
+		});
 	}
 
 	protected abstract HttpMessage newFullEmptyBodyMessage();

diff --git a/src/main/java/reactor/ipc/netty/http/server/HttpServerHandler.java b/src/main/java/reactor/ipc/netty/http/server/HttpServerHandler.java
@@ -166,6 +166,11 @@ public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise)
 			if (!shouldKeepAlive()) {
 				setKeepAlive(response, false);
 			}
+
+			if (isInformational(response)) {
+				ctx.write(msg, promise);
+				return;
+			}
 		}
 		if (msg instanceof LastHttpContent) {
 			if (!shouldKeepAlive()) {

diff --git a/src/main/java/reactor/ipc/netty/http/server/HttpServerOperations.java b/src/main/java/reactor/ipc/netty/http/server/HttpServerOperations.java
@@ -250,7 +250,13 @@ public Flux<?> receiveObject() {
 		//       No need to notify the upstream handlers - just log.
 		//       If decoding a response, just throw an error.
 		if (HttpUtil.is100ContinueExpected(nettyRequest)) {
-			return FutureMono.deferFuture(() -> channel().writeAndFlush(CONTINUE))
+			return FutureMono.deferFuture(() -> {
+						if(!hasSentHeaders()) {
+							return channel().writeAndFlush(CONTINUE);
+						}
+						return channel().newSucceededFuture();
+					})
+
 			                 .thenMany(super.receiveObject());
 		}
 		else {

diff --git a/src/test/java/reactor/ipc/netty/http/HttpTests.java b/src/test/java/reactor/ipc/netty/http/HttpTests.java
@@ -22,11 +22,10 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import org.assertj.core.api.Assertions;
 import org.junit.Test;
-
-import io.netty.buffer.ByteBuf;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 import reactor.core.scheduler.Schedulers;
@@ -284,4 +283,35 @@ public void webSocketRespondsToRequestsFromClients() {
 
 		server.dispose();
 	}
-}
+
+	@Test
+	public void test100Continue() throws Exception {
+		CountDownLatch latch = new CountDownLatch(1);
+		NettyContext server =
+				HttpServer.create(0)
+				          .newHandler((req, res) -> req.receive()
+				                                       .aggregate()
+				                                       .asString()
+				                                       .flatMap(s -> {
+					                                       latch.countDown();
+					                                       return res.sendString(Mono.just(s))
+					                                                 .then();
+				                                       }))
+				          .block(Duration.ofSeconds(30));
+
+		String content =
+				HttpClient.create(server.address().getPort())
+				          .post("/", req -> req.header("Expect", "100-continue")
+				                               .sendString(Flux.just("1", "2", "3", "4", "5")))
+				          .flatMap(res -> res.receive()
+				                             .aggregate()
+				                             .asString())
+				          .block();
+
+		System.out.println(content);
+
+		Assertions.assertThat(latch.await(30, TimeUnit.SECONDS)).isTrue();
+
+		server.dispose();
+	}
+}