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HelloWorldHttp1Handler Class — netty Architecture

Architecture documentation for the HelloWorldHttp1Handler class in HelloWorldHttp1Handler.java from the netty codebase.

Class java

Entity Profile

Dependency Diagram

graph TD
  f95b74b1_4022_4234_ac28_b2c846d5eeb9["HelloWorldHttp1Handler"]
  f55ed1ed_36b8_42e2_4529_f7bda94a3bdb["HelloWorldHttp1Handler.java"]
  f95b74b1_4022_4234_ac28_b2c846d5eeb9 -->|defined in| f55ed1ed_36b8_42e2_4529_f7bda94a3bdb
  576ccc27_8400_d79a_c712_e9345f175dd7["HelloWorldHttp1Handler()"]
  f95b74b1_4022_4234_ac28_b2c846d5eeb9 -->|method| 576ccc27_8400_d79a_c712_e9345f175dd7
  330baa21_2718_139e_7525_9e881786420a["channelRead0()"]
  f95b74b1_4022_4234_ac28_b2c846d5eeb9 -->|method| 330baa21_2718_139e_7525_9e881786420a
  caaa8fcd_af50_b811_61a6_73def695a342["channelReadComplete()"]
  f95b74b1_4022_4234_ac28_b2c846d5eeb9 -->|method| caaa8fcd_af50_b811_61a6_73def695a342
  dd99fe3a_17f4_e823_e4d0_a4710b0519a2["exceptionCaught()"]
  f95b74b1_4022_4234_ac28_b2c846d5eeb9 -->|method| dd99fe3a_17f4_e823_e4d0_a4710b0519a2

Relationship Graph

Source Code

testsuite-http2/src/main/java/io/netty/testsuite/http2/HelloWorldHttp1Handler.java lines 40–80

public class HelloWorldHttp1Handler extends SimpleChannelInboundHandler<FullHttpRequest> {
    private final String establishApproach;

    HelloWorldHttp1Handler(String establishApproach) {
        this.establishApproach = checkNotNull(establishApproach, "establishApproach");
    }

    @Override
    public void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) throws Exception {
        if (HttpUtil.is100ContinueExpected(req)) {
            ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE, ctx.alloc().buffer(0)));
        }
        boolean keepAlive = HttpUtil.isKeepAlive(req);

        ByteBuf content = ctx.alloc().buffer();
        content.writeBytes(HelloWorldHttp2Handler.RESPONSE_BYTES.duplicate());
        ByteBufUtil.writeAscii(content, " - via " + req.protocolVersion() + " (" + establishApproach + ")");

        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, content);
        response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8");
        response.headers().setInt(CONTENT_LENGTH, response.content().readableBytes());

        if (!keepAlive) {
            ctx.write(response).addListener(ChannelFutureListener.CLOSE);
        } else {
            response.headers().set(CONNECTION, HttpHeaderValues.KEEP_ALIVE);
            ctx.write(response);
        }
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
        ctx.close();
    }
}

Defined In

Source

Frequently Asked Questions

What is the HelloWorldHttp1Handler class?
HelloWorldHttp1Handler is a class in the netty codebase, defined in testsuite-http2/src/main/java/io/netty/testsuite/http2/HelloWorldHttp1Handler.java.
Where is HelloWorldHttp1Handler defined?
HelloWorldHttp1Handler is defined in testsuite-http2/src/main/java/io/netty/testsuite/http2/HelloWorldHttp1Handler.java at line 40.

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