testDecodeLargerThanMaxHeaderListSizeUpdatesDynamicTable() — netty Function Reference

Source Code

codec-http2/src/test/java/io/netty/handler/codec/http2/HpackDecoderTest.java lines 569–608

    @Test
    public void testDecodeLargerThanMaxHeaderListSizeUpdatesDynamicTable() throws Http2Exception {
        final ByteBuf in = Unpooled.buffer(300);
        try {
            hpackDecoder.setMaxHeaderListSize(200);
            HpackEncoder hpackEncoder = new HpackEncoder(true);

            // encode headers that are slightly larger than maxHeaderListSize
            Http2Headers toEncode = new DefaultHttp2Headers();
            toEncode.add("test_1", "1");
            toEncode.add("test_2", "2");
            toEncode.add("long", String.format("%0100d", 0).replace('0', 'A'));
            toEncode.add("test_3", "3");
            hpackEncoder.encodeHeaders(1, in, toEncode, NEVER_SENSITIVE);

            // decode the headers, we should get an exception
            final Http2Headers decoded = new DefaultHttp2Headers();
            assertThrows(Http2Exception.HeaderListSizeException.class, new Executable() {
                @Override
                public void execute() throws Throwable {
                    hpackDecoder.decode(1, in, decoded, true);
                }
            });

            // but the dynamic table should have been updated, so that later blocks
            // can refer to earlier headers
            in.clear();
            // 0x80, "indexed header field representation"
            // index 62, the first (most recent) dynamic table entry
            in.writeByte(0x80 | 62);
            Http2Headers decoded2 = new DefaultHttp2Headers();
            hpackDecoder.decode(1, in, decoded2, true);

            Http2Headers golden = new DefaultHttp2Headers();
            golden.add("test_3", "3");
            assertEquals(golden, decoded2);
        } finally {
            in.release();
        }
    }