spring - headers - resttemplate timeout

Cómo manejar la respuesta vacía en Spring RestTemplate

Question

Mi servicio de Autorización retoma un http 204 en caso de éxito y un http 401 en caso de fallo pero no responseBody. No puedo consumir esto con el cliente RestTemplate. Falla al intentar serializar la respuesta. El error de Jackson sugiere que active FAIL_ON_EMPTY_BEANS en el serializador, pero ¿cómo configurar esto en restTemplate?

El cliente consumiendo el resto api.

@SuppressWarnings("rawtypes")
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

    RestTemplate restTemplate = new RestTemplate();
    System.out.println("/n/n/n/n ============API REQUEST INTERCEPTOR=============== /n/n/n/n/n");

    if(StringUtils.isBlank(request.getHeader(AuthenticationKeys.AUTHENTICATIONTOKEN.name().toLowerCase()))){
        //TODO AUTHORIZE TOKEN
        ResponseEntity<AuthenticationResponse> authenticateResponse = restTemplate.getForEntity(authenticateUrl, AuthenticationResponse.class);
        if(authenticateResponse.getStatusCode().is2xxSuccessful()){
            //TODO SET THE TOKEN IN THE CONTEXT
            return true;
        }else{
            //TODO DO SOME ERROR HANDLING
            return false;
        }
    }else{
        AuthorizationRequest authorizationRequest = new AuthorizationRequest();
        authorizationRequest.setToken("TESTNG");
        ResponseEntity<Object> authorizationResponse = restTemplate.postForEntity(authorizeUrl, request, Object.class);
        if(authorizationResponse.getStatusCode().is2xxSuccessful()){
            return true;
        }else{
            //TODO DO SOME ERROR HANDLING
            if(authorizationResponse.getStatusCode().equals(HttpStatus.UNAUTHORIZED)){
                response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Oops! access to this API is not authorized to you.");
            }
            return false;
        }
    }

El servicio de descanso

@RequestMapping(value="/authorize", method = RequestMethod.POST)
    void authorize(@RequestBody @Valid AuthorizationRequest request, HttpServletResponse response){
        if(request.getToken().equals("TESTING")){
            response.setStatus(HttpServletResponse.SC_NO_CONTENT);
        }else{
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        }
    }
}

La excepción

Caused by: com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class org.apache.catalina.connector.CoyoteInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: org.apache.shiro.web.servlet.ShiroHttpServletRequest["request"]->org.apache.catalina.connector.RequestFacade["inputStream"])
    at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:59) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:26) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:129) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2238) ~[jackson-databind-2.5.0.jar:2.5.0]
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:231) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    ... 52 more

La solución intentada

RestTemplate restTemplate = new RestTemplate();
        List<HttpMessageConverter<?>> converters = restTemplate.getMessageConverters();
        for(HttpMessageConverter<?> converter : converters){
            if(converter instanceof MappingJackson2HttpMessageConverter){
                ((MappingJackson2HttpMessageConverter) converter).getObjectMapper().configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
            }
        }

El siguiente error

org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: getInputStream() has already been called for this request (through reference chain: org.apache.shiro.web.servlet.ShiroHttpServletRequest["request"]->org.apache.catalina.connector.RequestFacade["reader"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: getInputStream() has already been called for this request (through reference chain: org.apache.shiro.web.servlet.ShiroHttpServletRequest["request"]->org.apache.catalina.connector.RequestFacade["reader"])
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:238) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:208) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:777) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:566) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:529) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.client.RestTemplate.postForEntity(RestTemplate.java:356) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at mordeth.orchestration.interceptor.ApiRequestInterceptor.preHandle(ApiRequestInterceptor.java:120) ~[ApiRequestInterceptor.class:?]
    at org.springframework.web.servlet.HandlerExecutionChain.applyPreHandle(HandlerExecutionChain.java:134) ~[spring-webmvc-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938) [spring-webmvc-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) [spring-webmvc-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) [spring-webmvc-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868) [spring-webmvc-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646) [servlet-api.jar:?]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) [spring-webmvc-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) [servlet-api.jar:?]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [catalina.jar:7.0.57]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.57]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat7-websocket.jar:7.0.57]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.57]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.57]
    at mordeth.orchestration.controller.CorsFilter.doFilterInternal(CorsFilter.java:21) [CorsFilter.class:?]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.57]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.57]
    at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.2.0.jar:1.2.0]
    at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.2.0.jar:1.2.0]
    at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.2.0.jar:1.2.0]
    at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.2.0.jar:1.2.0]
    at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:380) [shiro-core-1.2.0.jar:1.2.0]
    at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.2.0.jar:1.2.0]
    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.0.jar:1.2.0]
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344) [spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261) [spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.57]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.57]
    at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:67) [log4j-web-2.0.jar:2.0]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.57]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.57]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.57]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.57]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) [catalina.jar:7.0.57]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [catalina.jar:7.0.57]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.57]
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) [catalina.jar:7.0.57]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.57]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421) [catalina.jar:7.0.57]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) [tomcat-coyote.jar:7.0.57]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) [tomcat-coyote.jar:7.0.57]
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) [tomcat-coyote.jar:7.0.57]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [?:1.7.0_71]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [?:1.7.0_71]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.57]
    at java.lang.Thread.run(Thread.java:745) [?:1.7.0_71]
Caused by: com.fasterxml.jackson.databind.JsonMappingException: getInputStream() has already been called for this request (through reference chain: org.apache.shiro.web.servlet.ShiroHttpServletRequest["request"]->org.apache.catalina.connector.RequestFacade["reader"])
    at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:210) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:177) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:190) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:671) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:129) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2238) ~[jackson-databind-2.5.0.jar:2.5.0]
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:231) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    ... 52 more
Caused by: java.lang.IllegalStateException: getInputStream() has already been called for this request
    at org.apache.catalina.connector.Request.getReader(Request.java:1239) ~[catalina.jar:7.0.57]
    at org.apache.catalina.connector.RequestFacade.getReader(RequestFacade.java:505) ~[catalina.jar:7.0.57]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_71]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_71]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_71]
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:536) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:129) ~[jackson-databind-2.5.0.jar:2.5.0]
    at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2238) ~[jackson-databind-2.5.0.jar:2.5.0]
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:231) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE]
    ... 52 more

Answer 1

Utilice String en lugar de AuthenticationResponse. Si obtiene una respuesta vacía, el valor de la cadena estará vacío.

ResponseEntity<String> authenticateResponse = restTemplate.getForEntity(authenticateUrl, String.class);

ACTUALIZACIÓN: Revisa este link . Creo que esto va a solucionar su problema.

ResponseEntity<Void> response = restTemplate.getForEntity(authenticateUrl,Void.class);
Void body = response.getBody();