testAccountForHeaderOverhead() — netty Function Reference

Source Code

codec-http2/src/test/java/io/netty/handler/codec/http2/HpackDecoderTest.java lines 631–660

    @Test
    public void testAccountForHeaderOverhead() throws Exception {
        final ByteBuf in = Unpooled.buffer(100);
        try {
            String headerName = "12345";
            String headerValue = "56789";
            long headerSize = headerName.length() + headerValue.length();
            hpackDecoder.setMaxHeaderListSize(headerSize);
            HpackEncoder hpackEncoder = new HpackEncoder(true);

            Http2Headers toEncode = new DefaultHttp2Headers();
            toEncode.add(headerName, headerValue);
            hpackEncoder.encodeHeaders(1, in, toEncode, NEVER_SENSITIVE);

            final Http2Headers decoded = new DefaultHttp2Headers();

            // SETTINGS_MAX_HEADER_LIST_SIZE is big enough for the header to fit...
            assertThat(hpackDecoder.getMaxHeaderListSize()).isGreaterThanOrEqualTo(headerSize);

            // ... but decode should fail because we add some overhead for each header entry
            assertThrows(Http2Exception.HeaderListSizeException.class, new Executable() {
                @Override
                public void execute() throws Throwable {
                    hpackDecoder.decode(1, in, decoded, true);
                }
            });
        } finally {
            in.release();
        }
    }