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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
  6ff65132_2bf7_69bc_0218_fa069113dc87["channelRead0()"]
  ecd87b1b_17db_6be0_8c18_3e5736e61a40["HttpHelloWorldServerHandler"]
  6ff65132_2bf7_69bc_0218_fa069113dc87 -->|defined in| ecd87b1b_17db_6be0_8c18_3e5736e61a40
  style 6ff65132_2bf7_69bc_0218_fa069113dc87 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

testsuite-jpms/src/main/java/io/netty/testsuite_jpms/main/HttpHelloWorldServerHandler.java lines 47–77

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

            String hello = HttpHelloWorldServer.content(ctx);

            boolean keepAlive = HttpUtil.isKeepAlive(req);
            FullHttpResponse response = new DefaultFullHttpResponse(
                    req.protocolVersion(), OK,
                    Unpooled.copiedBuffer(hello, StandardCharsets.UTF_8));
            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

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Defined In

Source

Frequently Asked Questions

What does channelRead0() do?
channelRead0() is a function in the netty codebase, defined in testsuite-jpms/src/main/java/io/netty/testsuite_jpms/main/HttpHelloWorldServerHandler.java.
Where is channelRead0() defined?
channelRead0() is defined in testsuite-jpms/src/main/java/io/netty/testsuite_jpms/main/HttpHelloWorldServerHandler.java at line 47.

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