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channelRead0() — netty Function Reference

Architecture documentation for the channelRead0() function in HttpHelloWorldServerHandler.java from the netty codebase.

Function java Buffer Telemetry

Entity Profile

Dependency Diagram

graph TD
  dfe99b30_4ec0_fab2_6dc2_b98b1d6e8b87["channelRead0()"]
  d21156b2_704d_97ce_4792_ad34bc69e57f["HttpHelloWorldServerHandler"]
  dfe99b30_4ec0_fab2_6dc2_b98b1d6e8b87 -->|defined in| d21156b2_704d_97ce_4792_ad34bc69e57f
  style dfe99b30_4ec0_fab2_6dc2_b98b1d6e8b87 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

example/src/main/java/io/netty/example/http/helloworld/HttpHelloWorldServerHandler.java lines 45–72

    @Override
    public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) {
        if (msg instanceof HttpRequest) {
            HttpRequest req = (HttpRequest) msg;

            boolean keepAlive = HttpUtil.isKeepAlive(req);
            FullHttpResponse response = new DefaultFullHttpResponse(req.protocolVersion(), OK,
                                                                    Unpooled.wrappedBuffer(CONTENT));
            response.headers()
                    .set(CONTENT_TYPE, TEXT_PLAIN)
                    .setInt(CONTENT_LENGTH, response.content().readableBytes());

            if (keepAlive) {
                if (!req.protocolVersion().isKeepAliveDefault()) {
                    response.headers().set(CONNECTION, KEEP_ALIVE);
                }
            } else {
                // Tell the client we're going to close the connection.
                response.headers().set(CONNECTION, CLOSE);
            }

            ChannelFuture f = ctx.write(response);

            if (!keepAlive) {
                f.addListener(ChannelFutureListener.CLOSE);
            }
        }
    }

Domain

Subdomains

Defined In

Source

Frequently Asked Questions

What does channelRead0() do?
channelRead0() is a function in the netty codebase, defined in example/src/main/java/io/netty/example/http/helloworld/HttpHelloWorldServerHandler.java.
Where is channelRead0() defined?
channelRead0() is defined in example/src/main/java/io/netty/example/http/helloworld/HttpHelloWorldServerHandler.java at line 45.

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