gateway转发微服务请求丢失header参数,因为项目中集成了SpringCloudOauth2做鉴权中心,网关做统一鉴权,鉴权后还希望将header中的token原样的转发到后续的微服务中。转发的时候重新构建下请求就可以了
ServerHttpRequest req = exchange.getRequest().mutate().headers(header -> header.add(HttpHeaders.AUTHORIZATION, token)).build();
ServerWebExchange webExchange = exchange.mutate().request(req).build();
return chain.filter(webExchange);
全部代码
package com.chai.filters;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.auth0.jwt.interfaces.Claim;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import org.apache.logging.log4j.util.Strings;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
@Component
public class TokenFilter implements GlobalFilter, Ordered {
@Value("${jwtSignStr}")
private String jwtSignStr;
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
String access_token = exchange.getRequest().getQueryParams().getFirst("access_token");
if (Strings.isBlank(access_token)) {
HttpHeaders headers = exchange.getRequest().getHeaders();
access_token = exchange.getRequest().getHeaders().getFirst("Authorization").replaceAll("Bearer","").trim();
}
if (Strings.isBlank(access_token)) {
DataBuffer dataBuffer = exchange.getResponse().bufferFactory().wrap("access_token is must required parameter".getBytes());
exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
return exchange.getResponse().writeWith(Mono.just(dataBuffer));
}
try {
Algorithm algorithm = Algorithm.HMAC256(jwtSignStr);
JWTVerifier verifier = JWT.require(algorithm).build();
verifier.verify(access_token);
String token = access_token;
ServerHttpRequest req = exchange.getRequest().mutate().headers(header -> header.add(HttpHeaders.AUTHORIZATION, token)).build();
ServerWebExchange webExchange = exchange.mutate().request(req).build();
return chain.filter(webExchange);
} catch (JWTDecodeException e) {
DataBuffer dataBuffer = exchange.getResponse().bufferFactory().wrap("access_token is bad format".getBytes());
exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
return exchange.getResponse().writeWith(Mono.just(dataBuffer));
} catch (TokenExpiredException e) {
DataBuffer dataBuffer = exchange.getResponse().bufferFactory().wrap("The access_token has expired".getBytes());
exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
return exchange.getResponse().writeWith(Mono.just(dataBuffer));
} catch (Exception e) {
e.printStackTrace();
exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
return exchange.getResponse().setComplete();
}
}
@Override
public int getOrder() {
return 1;
}
}