spring cloud gateway请求跨域问题解决方案

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，也希望大家多多支持。