我正在使用Jersey 2.22.1来实现REST API。
我创建了一个自定义异常映射器,将RuntimeException
映射到我选择的特定HTTP响应代码。
@Provider
public class MyExceptionMapper implements ExceptionMapper<RuntimeException>
{
@Override
public Response toResponse(RuntimeException exception)
{
....
}
}
我的资源类被配置为为POST请求获取许多参数。
@Path("rest/api/1.0/test")
public class MyResource
{
@NotNull(message = "Missing parameter 'param1'")
@FormParam("param1")
private String m_param1;
@NotNull(message = "Missing parameter 'param2'")
@FormParam("param2")
private String m_param2;
@POST
@Produces(MediaType.TEXT_PLAIN)
@Consumes("application/x-www-form-urlencoded")
public Response test(String body)
{
...
}
}
当我发送没有任何参数的POST请求时:
curl -X POST http://192.168.0.2:9989/myApp/rest/api/1.0/test
我期待调用自定义异常映射器,但事实并非如此。相反,我得到了一堆IllegalStateException
。
WARNING: The following warnings have been detected: WARNING: Unknown HK2 failure detected:
MultiException stack 1 of 6
java.lang.IllegalStateException: The @FormParam is utilized when the content type of the request entity is not application/x-www-form-urlencoded
at org.glassfish.jersey.server.internal.inject.FormParamValueFactoryProvider$FormParamValueFactory.ensureValidRequest(FormParamValueFactoryProvider.java:183)
at org.glassfish.jersey.server.internal.inject.FormParamValueFactoryProvider$FormParamValueFactory.getForm(FormParamValueFactoryProvider.java:167)
at org.glassfish.jersey.server.internal.inject.FormParamValueFactoryProvider$FormParamValueFactory.provide(FormParamValueFactoryProvider.java:118)
at org.glassfish.jersey.server.internal.inject.ParamInjectionResolver.resolve(ParamInjectionResolver.java:134)
at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:211)
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:234)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:357)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:471)
at org.glassfish.jersey.process.internal.RequestScope.findOrCreate(RequestScope.java:162)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2072)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:767)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:706)
at org.glassfish.jersey.internal.inject.Injections.getOrCreate(Injections.java:172)
at org.glassfish.jersey.server.model.MethodHandler$ClassBasedMethodHandler.getInstance(MethodHandler.java:284)
at org.glassfish.jersey.server.internal.routing.PushMethodHandlerRouter.apply(PushMethodHandlerRouter.java:74)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:109)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:112)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:112)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:112)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:92)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:61)
at org.glassfish.jersey.process.internal.Stages.process(Stages.java:197)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:318)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:384)
at org.glassfish.grizzly.http.server.HttpHandler$1.run(HttpHandler.java:224)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
at java.lang.Thread.run(Thread.java:745)
有人可以解释为什么我的自定义异常映射器没有被调用吗?
请注意,如果我在我的资源方法中抛出RuntimeException
然后发送有效的POST请求,则会调用异常映射器。所以我知道在某种程度上是否有效。
更新
我发现如果我将以下内容添加到HTTP请求中:
-H "Content-Type: application/x-www-form-urlencoded"
然后我的ConstraintViolationExceptionMapper
被调用。
@Provider
public class ConstraintViolationExceptionMapper implements ExceptionMapper<ConstraintViolationException>
{
...
}
但如果删除ConstraintViolationExceptionMapper
,我的自定义异常映射器仍未被调用。
答案 0 :(得分:1)
遵循JAX-RS规范,对于@XxxParam
和其他ConstraintViolationException
,当解析param期间发生异常时,Jersey会抛出已映射的异常。这是为了遵循规范以返回正确的响应状态。所以我们从来没有机会处理它。
泽西岛已经有mapper for ValidationException
,这是ConstrainViolationException
的超类。因此,当您为ValidationException
提供映射器时,它比ValidationException
更具体,因此会被调用。
即使我为{{1}}提供了一个映射器,当我发送没有标头的请求时也不会调用它。你知道为什么吗?
因为param解析发生在验证之前。
答案 1 :(得分:0)
被接受的答案似乎不正确(不再)。
所以我们永远没有机会来处理它。
现在不是真的。在https://stackoverflow.com/a/45478604/1271372中检查 什么是正确的解决方案 。
我紧随其后,实现了ExceptionMapper<SomeParseException>
并将其注册到JacksonFeature之前的资源配置register(ExceptionMapperImplementation.class, 1)
中,它的工作原理就像是一种魅力。请注意优先级1。
当然,这应该返回代码400。我必须将响应主体自定义为JSON,而不是纯文本。