spring-cloud-gateway 响应返回信息不全问题

一、获取响应返回信息不全问题:

@Override
public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    if (!logConfig.isLogOpen()) {
        return chain.filter(exchange);
    }

    GatewayContext gwContext = exchange.getAttribute(GatewayContext.GW_CONTEXT_KEY);

    ServerHttpResponse response = exchange.getResponse();
    DataBufferFactory bufferFactory = response.bufferFactory();
    ServerHttpResponseDecorator decoratedResponse = new ServerHttpResponseDecorator(response) {
        @Override
        public Mono writeWith(Publisher body) {
            if (body instanceof Flux) {
                Flux fluxBody = (Flux) body;
                return super.writeWith(fluxBody.map(dataBuffer -> {
                    byte[] content = new byte[dataBuffer.readableByteCount()];
                    dataBuffer.read(content);
                    DataBufferUtils.release(dataBuffer);

                    String responseBody = new String(content, StandardCharsets.ISO_8859_1);

                    recordExitAccessLog(gwContext,responseBody);
                    return bufferFactory.wrap(content);
                }));
            }
            return super.writeWith(body); // if body is not a flux. never got there.
        }
    };

    return chain.filter(exchange.mutate().response(decoratedResponse).build());
}

日志分两次打印

@Override
public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    if (!logConfig.isLogOpen()) {
        return chain.filter(exchange);
    }

    GatewayContext gwContext = exchange.getAttribute(GatewayContext.GW_CONTEXT_KEY);

    ServerHttpResponse response = exchange.getResponse();
    DataBufferFactory bufferFactory = response.bufferFactory();
    ServerHttpResponseDecorator decoratedResponse = new ServerHttpResponseDecorator(response) {
        @Override
        public Mono writeWith(Publisher body) {
            return super.writeWith(DataBufferUtils.join(Flux.from(body))
                    .map(dataBuffer -> {

                        byte[] content = new byte[dataBuffer.readableByteCount()];
                        dataBuffer.read(content);
                        DataBufferUtils.release(dataBuffer);
                        return content;

                    }).flatMap(bytes -> {
                        try{
                            String responseBody = new String(bytes, StandardCharsets.ISO_8859_1);
                            recordExitAccessLog(gwContext, responseBody);
                        }catch (Exception e){
                            log.warn("EXIT RECORD ERROR :{}", e.getMessage(), e);
                            MDC.remove("requestId");
                        }
                        return Mono.just(bufferFactory.wrap(bytes));
                    }));
        }

        @Override
        public Mono writeAndFlushWith(Publisher> body) {
            return writeWith(Flux.from(body).flatMapSequential(p -> p));
        }
    };

    return chain.filter(exchange.mutate().response(decoratedResponse).build());
}