verifyPushPromiseFrame() — netty Function Reference

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2FrameReader.java lines 335–348

    private void verifyPushPromiseFrame() throws Http2Exception {
        verifyNotProcessingHeaders();

        // Subtract the length of the promised stream ID field, to determine the length of the
        // rest of the payload (header block fragment + payload).
        int minLength = flags.getPaddingPresenceFieldLength() + INT_FIELD_LENGTH;
        if (payloadLength < minLength) {
            // PUSH_PROMISE frames carry a field_block and thus failure to process them results
            // in HPACK corruption and renders the connection unusable.
            // See https://datatracker.ietf.org/doc/html/rfc9113#section-4.2 for details.
            throw connectionError(FRAME_SIZE_ERROR,
                    "Frame length %d too small for PUSH_PROMISE frame with stream id %d.", payloadLength, streamId);
        }
    }