Example usage for io.netty.handler.codec.http2 Http2CodecUtil connectionPrefaceBuf

Introduction

In this page you can find the example usage for io.netty.handler.codec.http2 Http2CodecUtil connectionPrefaceBuf.

Prototype

public static ByteBuf connectionPrefaceBuf() 

Source Link

Document

Returns a buffer containing the #CONNECTION_PREFACE .

Usage

From source file:com.netty.grpc.proxy.demo.handler.GrpcProxyBackendHandler.java

License:Apache License

@Override
public void channelActive(ChannelHandlerContext ctx) {
    // //  w  ww. j  ava  2 s .  co  m
    Http2Settings settings = new Http2Settings();
    settings.initialWindowSize(DEFAULT_FLOW_CONTROL_WINDOW);
    settings.pushEnabled(false);
    settings.maxConcurrentStreams(0);
    ByteBuf preface = Http2CodecUtil.connectionPrefaceBuf().retainedDuplicate();
    ctx.write(preface);
    writer.writeSettings(ctx, settings, ctx.newPromise());
    writer.writeWindowUpdate(ctx, 0, 983041, ctx.newPromise());
    ctx.flush();
    ctx.read();
}

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From source file:com.netty.grpc.proxy.demo.handler.GrpcProxyFrontendHandler.java

License:Apache License

private boolean readClientPrefaceString(ByteBuf in) throws Http2Exception {
    ByteBuf clientPrefaceString = Http2CodecUtil.connectionPrefaceBuf();
    int prefaceRemaining = clientPrefaceString.readableBytes();
    int bytesRead = min(in.readableBytes(), prefaceRemaining);

    // If the input so far doesn't match the preface, break the connection.
    if (bytesRead == 0 || !ByteBufUtil.equals(in, in.readerIndex(), clientPrefaceString,
            clientPrefaceString.readerIndex(), bytesRead)) {
        String receivedBytes = hexDump(in, in.readerIndex(),
                min(in.readableBytes(), clientPrefaceString.readableBytes()));
        throw connectionError(PROTOCOL_ERROR,
                "HTTP/2 client preface string missing or corrupt. " + "Hex dump for received bytes: %s",
                receivedBytes);/*from w  w w. ja  v a  2 s  . c  o m*/
    }
    in.skipBytes(bytesRead);
    clientPrefaceString.skipBytes(bytesRead);

    if (!clientPrefaceString.isReadable()) {
        // Entire preface has been read.
        clientPrefaceString.release();
        return true;
    }
    return false;
}

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From source file:io.grpc.netty.NettyServerHandlerTest.java

License:Apache License

@Override
protected void manualSetUp() throws Exception {
    assertNull("manualSetUp should not run more than once", handler());

    initChannel(new GrpcHttp2ServerHeadersDecoder(GrpcUtil.DEFAULT_MAX_HEADER_LIST_SIZE));

    // replace the keepAliveManager with spyKeepAliveManager
    spyKeepAliveManager = mock(KeepAliveManager.class, delegatesTo(handler().getKeepAliveManagerForTest()));
    handler().setKeepAliveManagerForTest(spyKeepAliveManager);

    // Simulate receipt of the connection preface
    handler().handleProtocolNegotiationCompleted(Attributes.EMPTY, /*securityInfo=*/ null);
    channelRead(Http2CodecUtil.connectionPrefaceBuf());
    // Simulate receipt of initial remote settings.
    ByteBuf serializedSettings = serializeSettings(new Http2Settings());
    channelRead(serializedSettings);//from  w  w w  . jav  a 2  s .co  m
}

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From source file:io.grpc.netty.NettyServerHandlerTest.java

License:Apache License

@Test
public void transportReadyDelayedUntilConnectionPreface() throws Exception {
    initChannel(new GrpcHttp2ServerHeadersDecoder(GrpcUtil.DEFAULT_MAX_HEADER_LIST_SIZE));

    handler().handleProtocolNegotiationCompleted(Attributes.EMPTY, /*securityInfo=*/ null);
    verify(transportListener, never()).transportReady(any(Attributes.class));

    // Simulate receipt of the connection preface
    channelRead(Http2CodecUtil.connectionPrefaceBuf());
    channelRead(serializeSettings(new Http2Settings()));
    verify(transportListener).transportReady(any(Attributes.class));
}

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