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zuul网关 gateway网关
public class CorsWebFilter implements WebFilter {
private static final String ALL = "*";
private static final String MAX_AGE = "18000L";
@Override
public Mono<Void> filter(ServerWebExchange ctx, WebFilterChain chain) {
ServerHttpRequest request = ctx.getRequest();
String path=request.getPath().value();
ServerHttpResponse response = ctx.getResponse();
if("/favicon.ico".equals(path)) {
response.setStatusCode(HttpStatus.OK);
return Mono.empty();
}
if (!CorsUtils.isCorsRequest(request)) {
return chain.filter(ctx);
}
HttpHeaders requestHeaders = request.getHeaders();
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);
}
}
  
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