前言

由于接口需要有个token认证，需要放在cookie中，但是这个token中含有= ，+， / 等符号，存储在前端导致了乱码。所以想了个办法在网关这层将cookie 在解码一下再放进去。

cookie的修改

原本我是采用这种方式 new一个新的MultiValueMap 将修改好的cookie放入。
之后在通过public MultiValueMap<String, HttpCookie> getCookies() 这个方法
但是没有效果不知道为什么。(有大佬知道吗)

		ServerHttpRequest oldRequest= exchange.getRequest();
        MultiValueMap<String, HttpCookie> cookieMultiValueMap =  oldRequest.getCookies();
        HttpCookie cookie = cookieMultiValueMap.getFirst("LtpaToken");

        MultiValueMap<String, HttpCookie> NewCookieMultiValueMap = new LinkedMultiValueMap<>();
        NewCookieMultiValueMap.add("LtpaToken",cookie);
		
		
		newRequest = new ServerHttpRequestDecorator(newRequest) {
              public MultiValueMap<String, HttpCookie> getCookies() {
		        return NewCookieMultiValueMap;
		    }
          };
		

没办法采用修改header方法

@Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest oldRequest= exchange.getRequest();
        MultiValueMap<String, HttpCookie> cookieMultiValueMap =  oldRequest.getCookies();
        HttpCookie cookie = cookieMultiValueMap.getFirst("LtpaToken");
        if(cookie != null){
            String cookieValue = URLDecoder.decode(cookie.getValue());

            //把request重新包装,继续传递
            URI uri = oldRequest.getURI();
            ServerHttpRequest newRequest = oldRequest.mutate().uri(uri).build();

            // 定义新的消息头
            HttpHeaders headers = new HttpHeaders();
            headers.putAll(exchange.getRequest().getHeaders());


            headers.remove(HttpHeaders.COOKIE);
            headers.set(HttpHeaders.COOKIE, "LtpaToken="+cookieValue);

            newRequest = new ServerHttpRequestDecorator(newRequest) {
                @Override
                public HttpHeaders getHeaders() {
                    return headers;
                }
            };
            return chain.filter(exchange.mutate().request(newRequest).build());
        }else{
            return chain.filter(exchange);
        }
    }