查阅了很多资料，最开始通过在gateway.yml中配置允许的跨域参数，发现没办法获取到验证码图片，也就是"/code"接口，浏览器status为Cors error，代码如下：
spring:
cloud:
gateway:
globalcors:
corsConfigurations:
'[/**]':
allowedOrigins: "*" #允许所有ip跨域访问
allowedOriginPatterns: "*"
allowed-methods: "*" #允许所有请求方式
allowed-headers: "*" #允许任何头进行跨域
allow-credentials: true #允许携带cookie
exposedHeaders: "Content-Disposition,Content-Type,Cache-Control"
然后翻阅ISSUE找到通过代码的形式实现跨域，然而还是同样的无法获取到验证码信息：
代码放在gateway模块中，config包下：
通过在RouterFunctionConfiguration.java中定义corsFilter不行：
package com.zcl.gateway.config;
import com.zcl.gateway.handler.ValidateCodeHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.server.RequestPredicates;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.RouterFunctions;
/**
* 路由配置信息
*
* @AUTHOR ZCL-CN.Y
*/
@Configuration
public class RouterFunctionConfiguration
{
/**
* 这里为支持的请求头，如果有自定义的header字段请自己添加
*/
private static final String ALLOWED_HEADERS = "X-Requested-With, Content-Type, Authorization, credential, X-XSRF-TOKEN, token, username, client, request-origion";
private static final String ALLOWED_METHODS = "*";
private static final String ALLOWED_ORIGIN = "*";
private static final String ALLOWED_EXPOSE = "*";
private static final String MAX_AGE = "18000L";
@Autowired
private ValidateCodeHandler validateCodeHandler;
@SuppressWarnings("rawtypes")
@Bean
public RouterFunction routerFunction()
{
return RouterFunctions.route(
RequestPredicates.GET("/code").and(RequestPredicates.accept(MediaType.TEXT_PLAIN)),
validateCodeHandler);
}
/**
* 跨域配置
*/
@Bean
public WebFilter corsFilter()
{
return (ServerWebExchange ctx, WebFilterChain chain) -> {
ServerHttpRequest request = ctx.getRequest();
if (CorsUtils.isCorsRequest(request))
{
ServerHttpResponse response = ctx.getResponse();
HttpHeaders headers = response.getHeaders();
headers.add("Access-Control-Allow-Headers", ALLOWED_HEADERS);
headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS);
headers.add("Access-Control-Allow-Origin", ALLOWED_ORIGIN);
headers.add("Access-Control-Expose-Headers", ALLOWED_EXPOSE);
headers.add("Access-Control-Max-Age", MAX_AGE);
headers.add("Access-Control-Allow-Credentials", "true");
if (request.getMethod() == HttpMethod.OPTIONS)
{
response.setStatusCode(HttpStatus.OK);
return Mono.empty();
}
}
return chain.filter(ctx);
};
}
}
在config包中新建CorsConfig.java类重新定义WebFilter也不行：
package com.zcl.gateway.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.cors.reactive.CorsUtils;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;
/**
* 跨域配置
*
* @author ruoyi
*/
@Configuration
public class CorsConfig
{
/**
* 这里为支持的请求头，如果有自定义的header字段请自己添加
*/
private static final String ALLOWED_HEADERS = "X-Requested-With, Content-Type, Authorization, credential, X-XSRF-TOKEN, token, Admin-Token, App-Token";
private static final String ALLOWED_METHODS = "GET,POST,PUT,DELETE,OPTIONS,HEAD";
private static final String ALLOWED_ORIGIN = "*";
private static final String ALLOWED_EXPOSE = "*";
private static final String MAX_AGE = "18000L";
@Bean
public WebFilter corsFilter()
{
return (ServerWebExchange ctx, WebFilterChain chain) -> {
ServerHttpRequest request = ctx.getRequest();
if (CorsUtils.isCorsRequest(request))
{
ServerHttpResponse response = ctx.getResponse();
HttpHeaders headers = response.getHeaders();
headers.add("Access-Control-Allow-Headers", ALLOWED_HEADERS);
headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS);
headers.add("Access-Control-Allow-Origin", ALLOWED_ORIGIN);
headers.add("Access-Control-Expose-Headers", ALLOWED_EXPOSE);
headers.add("Access-Control-Max-Age", MAX_AGE);
headers.add("Access-Control-Allow-Credentials", "true");
if (request.getMethod() == HttpMethod.OPTIONS)
{
response.setStatusCode(HttpStatus.OK);
return Mono.empty();
}
}
return chain.filter(ctx);
};
}
}
接口是从localhost:8081 -> localhost:5201,前端没有做代理（因为项目中内嵌了其他的东西所以只能通过后端来解决跨域问题），并且目前只是开发阶段，没有nginx反向代理之类的东西，请问具体是哪儿的问题导致的允许跨域不生效？具体应该通过什么方法来解决呢？
