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spring cloud gateway请求跨域问题解决方案

2020-03-11 17:52 2426 查看

这篇文章主要介绍了spring cloud gateway请求跨域问题解决方案,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

代码如下

@Configuration
public class CorsConfig implements GlobalFilter, Ordered {
private static final String ALL = "*";
private static final String MAX_AGE = "18000L";

@Bean
public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient,
DiscoveryLocatorProperties properties) {
return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties);
}

@Bean
public ServerCodecConfigurer serverCodecConfigurer() {
return new DefaultServerCodecConfigurer();
}
   //添加请求头 
@Bean
public WebFilter corsFilter() {
return (ServerWebExchange ctx, WebFilterChain chain) -> {
ServerHttpRequest request = ctx.getRequest();
if (!CorsUtils.isCorsRequest(request)) {
return chain.filter(ctx);
}
HttpHeaders requestHeaders = request.getHeaders();
ServerHttpResponse response = ctx.getResponse();
HttpMethod requestMethod = requestHeaders.getAccessControlRequestMethod();
HttpHeaders headers = response.getHeaders();
headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, requestHeaders.getOrigin());
headers.addAll(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, requestHeaders.getAccessControlRequestHeaders());
if (requestMethod != null) {
headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, requestMethod.name());
}
headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
headers.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, ALL);
headers.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE);
if (request.getMethod() == HttpMethod.OPTIONS) {
response.setStatusCode(HttpStatus.OK);
return Mono.empty();
}
return chain.filter(ctx);
};
}
  //将请求头中有多个值的去掉 这是该版本的一个bug
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
return chain.filter(exchange).then(Mono.defer(() -> {
exchange.getResponse().getHeaders().entrySet().stream()
.filter(kv -> (kv.getValue() != null && kv.getValue().size() > 1))
.filter(kv -> (kv.getKey().equals(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN)
|| kv.getKey().equals(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS)))
.forEach(kv -> {
kv.setValue(new ArrayList<String>() {{
add(kv.getValue().get(0));
}});
});

return chain.filter(exchange);
}));
}

@Override
public int getOrder() {
// 指定此过滤器位于NettyWriteResponseFilter之后
// 即待处理完响应体后接着处理响应头
return NettyWriteResponseFilter.WRITE_RESPONSE_FILTER_ORDER + 1;
}
}

此处的spring-cloud-gateway的版本是2.1.3.RELEASE

以上就是本文的全部内容,希望对大家的学习有所帮助

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标签:  spring cloud gateway 跨域