rabbitmq的Spring Boot受信任包

Question

我们正在构建一个通过RabbitMQ接收消息的Spring Boot应用程序(2.0.4版本）。因此，application.properties包含与rabbit相关的配置：

spring.rabbitmq.addresses=****
spring.rabbitmq.username=****
spring.rabbitmq.password=****
spring.rabbitmq.listener.simple.concurrency=2
spring.rabbitmq.listener.simple.prefetch=5
spring.rabbitmq.listener.simple.retry.enabled=true
spring.rabbitmq.listener.simple.retry.max-attempts=5

配置：

@Bean
public TopicExchange fileUpdate() {
    return new TopicExchange("my.fancy.exchange", true, false);
}

@Bean
public Queue fileUpload() {
    return new Queue("myFancyQueue", true);
}

@Bean
public Binding bindingUpload(Queue queue, TopicExchange eventExchange) {
    return BindingBuilder.bind(queue).to(eventExchange).with("");
}

@RabbitListener(queues = "myFancyQueue")
public void receive(Object message) {
    ...
}

原因：java.lang.IllegalArgumentException：类“My.Fancy.Package.Clazz”不在受信任的包[java.util,java.lang]中。如果您认为反序列化该类是安全的，请提供它的名称。如果序列化仅由受信任的源完成，则还可以启用trust all(*)。

根据我目前所发现的情况，activeMQ通过application.properties为其提供了一个配置选项

spring.activemq.packages.trust-all=

或

spring.activemq.packages.trusted=

但我找不到任何类似的选项可以对RabbitMQ起作用。到目前为止，我一直在使用一个解决我的问题的变通方法，但当然，如果在配置文件中有这样一个选项，那就太好了。

目前我的解决方案：

正在向配置类添加：

@Bean
public MessageConverter jsonMessageConverter() {
    Jackson2JsonMessageConverter jsonMessageConverter = new Jackson2JsonMessageConverter(new ObjectMapper());
    jsonMessageConverter.setClassMapper(new ImporterClassMapper(FileUploadMessage.class));        
    return jsonMessageConverter;
}

@Bean
public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
    RabbitTemplate template = new RabbitTemplate(connectionFactory);
    template.setMessageConverter(jsonMessageConverter());
    return template;
}

并将消息使用者更改为

@Resource(name = "jsonMessageConverter")
private MessageConverter messageConverter;

@RabbitListener(queues = "${uploaded.files.queue}")
public void receive(Message message) {
    FileUploadMessage uploadMessage = (FileUploadMessage) messageConverter.fromMessage(message);
    ...
}

另外，添加一个类映射器，允许导入未知类型，并设置一个默认类型，在导入时将消息强制转换为默认类型：

public class ImporterClassMapper implements ClassMapper, InitializingBean {

    private volatile Class<?> defaultType;

    public ImporterClassMapper(Class<?> defaultType) {
        this.defaultType = defaultType;
    }    

    @Override
    public void afterPropertiesSet() throws Exception {
        // nothing to do
    }

    @Override
    public void fromClass(Class<?> clazz, MessageProperties properties) {
        // avoid setting __TypeId__ header so consumers from other modules can implement their own DTOs
    }

    @Override
    public Class<?> toClass(MessageProperties properties) {
        return this.defaultType;
    }

    public void setClass(Class<?> type) {
        this.defaultType = type;
    }
}

对于如何改进这个解决方案有什么建议吗？

Answer 1

我通过在正在使用的Spring AMQP ClassMapper上设置受信任的包修复了相同的错误。

@Configuration
public class RabbitConfig {

    @Bean
    @Scope("prototype")
    public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(SimpleRabbitListenerContainerFactory factory, ObjectMapper objectMapper) {
        factory.setMessageConverter(jsonToMapMessageConverter(objectMapper));
        return factory;
    }

    @Bean
    public MessageConverter jsonToMapMessageConverter(ObjectMapper objectMapper) {
        Jackson2JsonMessageConverter messageConverter = new ImplicitJsonMessageConverter(objectMapper);
        DefaultClassMapper classMapper = new DefaultClassMapper();
        classMapper.setTrustedPackages("*");
        classMapper.setDefaultType(Map.class);
        messageConverter.setClassMapper(classMapper);
        return messageConverter;
    }

    public static class ImplicitJsonMessageConverter extends Jackson2JsonMessageConverter {    
        public ImplicitJsonMessageConverter(ObjectMapper jsonObjectMapper) {
            super(jsonObjectMapper, "*");
        }    
        @Override
        public Object fromMessage(Message message) throws MessageConversionException {
            message.getMessageProperties().setContentType("application/json");
            return super.fromMessage(message);
        }
    }
}