StripPrefixGatewayFilterFactory

如果配置 StripPrefix=1，则去掉第1层路径

例子： /first/order/info 则变为 /order/info

spring:  application:    name: geteway  cloud:    gateway:      routes:      # lb 前缀匹配  /secnod/102/echo  /myprefix/102/echo      - id: 102_lb_forward        uri: lb://order-service  # 目标服务地址        predicates:          - Path=/secnod/102/*        filters:          - StripPrefix=1 # 转发之前去掉1层路径 取消 /second          - PrefixPath=/myprefix    # 路径前面会加myprefix  加上/myprefix

public GatewayFilter apply(Config config) {		return new GatewayFilter() {			@Override			public Mono
   
     filter(ServerWebExchange exchange,					GatewayFilterChain chain) {				ServerHttpRequest request = exchange.getRequest();				addOriginalRequestUrl(exchange, request.getURI());				String path = request.getURI().getRawPath();                // 去掉最前面1(parts)层路径				String newPath = "/"						+ Arrays.stream(StringUtils.tokenizeToStringArray(path, "/"))								.skip(config.parts).collect(Collectors.joining("/"));				newPath += (newPath.length() > 1 && path.endsWith("/") ? "/" : "");				ServerHttpRequest newRequest = request.mutate().path(newPath).build();				exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR,						newRequest.getURI());				return chain.filter(exchange.mutate().request(newRequest).build());			}			@Override			public String toString() {				return filterToStringCreator(StripPrefixGatewayFilterFactory.this)						.append("parts", config.getParts()).toString();			}		};	}

PrefixPathGatewayFilterFactory

/102/echo 会变成 /myprefix/102/echo

把prefix放到路径最前面

属性：PrefixPath

spring:  application:    name: geteway  cloud:    gateway:      routes:      # lb 前缀匹配  /secnod/102/echo  /myprefix/102/echo      - id: 102_lb_forward        uri: lb://order-service  # 目标服务地址        predicates:          - Path=/secnod/102/*        filters:          - StripPrefix=1 # 转发之前去掉1层路径 取消 /second          - PrefixPath=/myprefix    # 路径前面会加myprefix  加上/myprefix

public GatewayFilter apply(Config config) {		return new GatewayFilter() {			@Override			public Mono
   
     filter(ServerWebExchange exchange,					GatewayFilterChain chain) {				boolean alreadyPrefixed = exchange						.getAttributeOrDefault(GATEWAY_ALREADY_PREFIXED_ATTR, false);				if (alreadyPrefixed) {					return chain.filter(exchange);				}				exchange.getAttributes().put(GATEWAY_ALREADY_PREFIXED_ATTR, true);				ServerHttpRequest req = exchange.getRequest();				addOriginalRequestUrl(exchange, req.getURI());                // 注意这里  把prefix是放到路径最前面的				String newPath = config.prefix + req.getURI().getRawPath();				ServerHttpRequest request = req.mutate().path(newPath).build();				exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR, request.getURI());				if (log.isTraceEnabled()) {					log.trace("Prefixed URI with: " + config.prefix + " -> "							+ request.getURI());				}				return chain.filter(exchange.mutate().request(request).build());			}			@Override			public String toString() {				return filterToStringCreator(PrefixPathGatewayFilterFactory.this)						.append("prefix", config.getPrefix()).toString();			}		};