问题描述
@Context注入适用于类，但不能使它与Objects一起使用。
@Context injection works with classes but not able to make it work with Objects.
ContainerRequestFilter中的httpServletRequest产生空指针。
httpServletRequest in ContainerRequestFilter produces null pointer.
Dropwizard版本： - 1.1.0
Dropwizard Version:- 1.1.0
ContainerRequestFilter
ContainerRequestFilter
public class ApplicationIPAuthFilter implements ContainerRequestFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(ApplicationIPAuthFilter.class);
private HerculesRestAccessor restAccessor;
private String applicationName;
@Context
private HttpServletRequest httpServletRequest;
public ApplicationIPAuthFilter(){
}
public ApplicationIPAuthFilter(HerculesRestAccessor accessor, String applicationName) {
restAccessor = accessor;
this.applicationName = applicationName;
}
@Override
public void filter(ContainerRequestContext requestContext) throws IOException {
// need remote Ip
String remoteIp = this.httpServletRequest.getRemoteAddr();
....
}
}
DynamicFeature
DynamicFeature
@Provider
public class ApplicationIPAuthFeature implements DynamicFeature {
private final HerculesRestAccessor accessor;
private final String applicationName;
public ApplicationIPAuthFeature(HerculesRestAccessor accessor, String applicationName) {
this.accessor = accessor;
this.applicationName = applicationName;
}
@Override
public void configure(ResourceInfo resourceInfo, FeatureContext context) {
if (resourceInfo.getResourceMethod().getAnnotation(ApplicationIPAuthRequired.class) != null) {
// not working
context.register(new ApplicationIPAuthFilter(accessor, applicationName));
//@Context injection works in ContainerRequestFilter for classes
//context.register(ApplicationIPAuthFilter.class);
}
}
}
我正在尝试获取远程ip in ContainerRequestFilter基于ip验证请求。
I'm trying to fetch remote ip in ContainerRequestFilter to authenticate request based on ip.
如何解决这个问题..需要帮助吗？
How do I fix this.. need help?
推荐答案
。注册为对象时注入不起作用。
It's a known issue with DynamicFeature. Injections don't work when registering as an object.
您可以做的一件事是手动注入它，如。
One thing you can do is manually inject it, like mentioned in this post.
你可以做的另一件事是做 HerculesRestAccessor 和 applicationName 注入。或者更确切地说，使应用程序名称可注入，您可以使其成为配置属性并。如果你这样做，那么你可以将过滤器注册为一个类，所有的注入都应该有效。
Another thing you can do is make the HerculesRestAccessor and the applicationName injectable. Or rather then making the application name injectable, you can make it a configuration property and inject the configuration. If you do this, then you can register the filter as a class, and all the injections should work.
这篇关于@Context注入无效在Jersey ContainerRequestFilter（Dropwizard）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！