keycloak redirect_uri is incorrect

在用keycloak做单点登录集成的时候，在本地测试没问题，在UAT环境有时候，发现keycloak发起的redirect_uri 不正确，比如原来是域名的，有可能变成了IP，其实是可以自己指定的。自己指定redirect_uri 是自己配置。代码如下：

import org.keycloak.adapters.AdapterTokenStore;
import org.keycloak.adapters.KeycloakDeployment;
import org.keycloak.adapters.OAuthRequestAuthenticator;
import org.keycloak.adapters.RequestAuthenticator;
import org.keycloak.adapters.spi.HttpFacade;
import org.keycloak.adapters.springsecurity.authentication.SpringSecurityRequestAuthenticator;
import org.keycloak.adapters.springsecurity.authentication.SpringSecurityRequestAuthenticatorFactory;
import org.keycloak.adapters.springsecurity.filter.KeycloakAuthenticationProcessingFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

@Component
public class KeycloackAuthenticationProcessingFilterPostProcessor implements BeanPostProcessor {

    @Value("${customize.keycloak.redirect-uri}")
    private String redirectUri;

    private static final Logger logger = LoggerFactory.getLogger(KeycloackAuthenticationProcessingFilterPostProcessor.class);

    private void process(KeycloakAuthenticationProcessingFilter filter) {
        filter.setRequestAuthenticatorFactory(new SpringSecurityRequestAuthenticatorFactory() {

            @Override
            public RequestAuthenticator createRequestAuthenticator(HttpFacade facade, HttpServletRequest request, KeycloakDeployment deployment, AdapterTokenStore tokenStore, int sslRedirectPort) {
                return new SpringSecurityRequestAuthenticator(facade, request, deployment, tokenStore, sslRedirectPort) {
                    @Override
                    protected OAuthRequestAuthenticator createOAuthAuthenticator() {
                        return new OAuthRequestAuthenticator(this, facade, deployment, sslRedirectPort, tokenStore) {
                            @Override
                            protected String getRequestUrl() {
                                logger.info("get redirect uri: {}", redirectUri);
                                return redirectUri;
                            }
                        };
                    }

                };
            }
        });
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if (bean instanceof KeycloakAuthenticationProcessingFilter) {
            logger.info("Injecting Custom handler...");
            process(((KeycloakAuthenticationProcessingFilter) bean));
        }
        return bean;
    }
}

可以在配置文件中增加一个

customize.keycloak.redirect-uri= http://www.mydomain.com/sso/login

用这种方式就能实现自定义redirect_uri 了。