OAuth2: Cors Error

[JamesTaylor04]

Hello, when using springdoc and spring security oauth2 server, I encountered a problem, called CORS error after authenticated from keycloak, and below is the error message of browser, Sincerely need your help.

• My OpenAPI COnfiguration FIle

package com.dooool.cloud.services.usm.config;

import io.swagger.v3.oas.annotations.OpenAPIDefinition;
import io.swagger.v3.oas.annotations.enums.SecuritySchemeType;
import io.swagger.v3.oas.annotations.info.Info;
import io.swagger.v3.oas.annotations.info.License;
import io.swagger.v3.oas.annotations.security.OAuthFlow;
import io.swagger.v3.oas.annotations.security.OAuthFlows;
import io.swagger.v3.oas.annotations.security.SecurityRequirement;
import io.swagger.v3.oas.annotations.security.SecurityScheme;
import io.swagger.v3.oas.annotations.servers.Server;
import org.springdoc.core.GroupedOpenApi;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 文档配置类
 *
 * @author Aris Hu created at 2021-04-17
 */
@Configuration
@OpenAPIDefinition(
    servers = @Server(url = "http://localhost:9080/usm"),
    info = @Info(
        title = "Upload Service API",
        description = "上传服务接口",
        version = "V1.0.0",
        license = @License(name = "MIT License", url = "/usm/LICENSE.txt")
    )
)
@SecurityScheme(
    name = "keycloak",
    type = SecuritySchemeType.OAUTH2,
    openIdConnectUrl = "${provider.keycloak.url}",
    flows = @OAuthFlows(
        authorizationCode = @OAuthFlow(
            authorizationUrl = "${provider.keycloak.authorization-uri}",
            tokenUrl = "${provider.keycloak.token-uri}"
        )
    )
)
public class DocumentationConfig {

  @Bean
  public GroupedOpenApi uploadApi() {
    return GroupedOpenApi.builder()
        .group("Upload API")
        .pathsToMatch("/api/upload/**")
        .build();
  }
}

[JamesTaylor04]

solved