Springcloud+Nacos支持账号密码登录

在Springcloud官方，spring-cloud-alibaba目前的最新版本是2.2.0.RELEASE，如下

            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

该版本支持的nacos-client版本是1.1.4，如下：

    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
    <version>2.2.0.RELEASE</version>
    <packaging>pom</packaging>
    <name>Spring Cloud Alibaba Dependencies</name>
    <description>Spring Cloud Alibaba Dependencies</description>

    <properties>
        <sentinel.version>1.7.1</sentinel.version>
        <oss.version>3.1.0</oss.version>
        <seata.version>1.0.0</seata.version>
        <nacos.client.version>1.1.4</nacos.client.version>
        <nacos.config.version>0.8.0</nacos.config.version>
        <acm.version>1.0.9</acm.version>

但是，该版本的nacos-client不支持账号密码登录到nacos服务端。
那我们想要支持client端账号密码登录该如何做呢？

• 1，先升级nacos-client版本到最新：

            <dependency>
                <groupId>com.alibaba.nacos</groupId>
                <artifactId>nacos-client</artifactId>
                <version>1.2.0</version>
            </dependency>

• 2，扩展NacosConfigProperties支持账号密码

public class MyNacosConfigProperties extends NacosConfigProperties {
    private static final Pattern PATTERN = Pattern.compile("-(\\w)");
    
    private String username;
    private String password;
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
    @Override
    public Properties assembleConfigServiceProperties() {
        Properties properties = super.assembleConfigServiceProperties();
        
        // 把账号添加到properties环境中
        properties.put(USERNAME, Objects.toString(this.username, ""));
        properties.put(PASSWORD, Objects.toString(this.password, ""));

        enrichNacosConfigProperties(properties);
        
        return properties;
    }
    
    private void enrichNacosConfigProperties(Properties nacosConfigProperties) {
        Map<String, Object> properties = PropertySourcesUtils
                .getSubProperties((ConfigurableEnvironment) getEnvironment(), PREFIX);
        properties.forEach((k, v) -> nacosConfigProperties.putIfAbsent(resolveKey(k),
                String.valueOf(v)));
    }
    
    private String resolveKey(String key) {
        Matcher matcher = PATTERN.matcher(key);
        StringBuffer sb = new StringBuffer();
        while (matcher.find()) {
            matcher.appendReplacement(sb, matcher.group(1).toUpperCase());
        }
        matcher.appendTail(sb);
        return sb.toString();
    }
}

注意：这里重点是enrichNacosConfigProperties()方法；并且注意与NacosConfigProperties 的实例化bean的顺序。

• 3，注册一个MyNacosConfigProperties类型的bean

@Configuration(proxyBeanMethods = false)
@ConditionalOnProperty(name = "spring.cloud.nacos.config.enabled", matchIfMissing = true)
@AutoConfigureAfter(NacosConfigProperties.class)
public class NacosConfigConfig {
    @Primary
    @Bean
         @ConfigurationProperties(NacosConfigProperties.PREFIX)
    public MyNacosConfigProperties myNacosConfigProperties(ApplicationContext context) {
        if (context.getParent() != null
                && BeanFactoryUtils.beanNamesForTypeIncludingAncestors(
                        context.getParent(), MyNacosConfigProperties.class).length > 0) {
            return BeanFactoryUtils.beanOfTypeIncludingAncestors(context.getParent(),
                    MyNacosConfigProperties.class);
        }
        return new MyNacosConfigProperties();
    }
}

• 4，修改配置文件，增加username和password配置

spring: 
  cloud: 
    nacos: 
      config: 
        enabled: true
        server-addr: 192.168.1.10:8848
        file-extension: yaml
        namespace: tenantA
        group: APPA_GROUP
        data-id: appA_A
        refresh.enabled: true
        prefix: appA_A
        encode: UTF-8
        timeout: 10000
        context-path: /nacos
        username: nacos
        password: nacos

现在client端可以支持username和password登录到nacos服务端了。