Sto lavorando con Spring 3 e RestTemplate. Ho fondamentalmente, due applicazioni e una di esse deve inviare valori all'altra app. attraverso il modello di riposo.Invio di file multipart come parametri POST con richieste di RestTemplate
Quando i valori da caricare sono stringhe, funziona perfettamente, ma quando devo inserire parametri misti e complessi (come MultipartFiles) ottengo un'eccezione del convertitore.
Come esempio, ho questo:
App1 - PostController:
@RequestMapping(method = RequestMethod.POST)
public String processSubmit(@ModelAttribute UploadDTO pUploadDTO,
BindingResult pResult) throws URISyntaxException, IOException {
URI uri = new URI("http://localhost:8080/app2/file/receiver");
MultiValueMap<String, Object> mvm = new LinkedMultiValueMap<String, Object>();
mvm.add("param1", "TestParameter");
mvm.add("file", pUploadDTO.getFile()); // MultipartFile
Map result = restTemplate.postForObject(uri, mvm, Map.class);
return "redirect:postupload";
}
Sull'altro lato ... ho un'altra applicazione web (App2) che riceve i parametri dal App1 .
App2 - ReceiverController
@RequestMapping(value = "/receiver", method = { RequestMethod.POST })
public String processUploadFile(
@RequestParam(value = "param1") String param1,
@RequestParam(value = "file") MultipartFile file) {
if (file == null) {
System.out.println("Shit!... is null");
} else {
System.out.println("Yes!... work done!");
}
return "redirect:postupload";
}
La mia applicazione-context.xml:
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
<bean class="org.springframework.http.converter.FormHttpMessageConverter" />
<bean class="org.springframework.http.converter.StringHttpMessageConverter" />
<bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter" />
</list>
</property>
</bean>
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize">
<value>104857600</value>
</property>
<property name="maxInMemorySize">
<value>4096</value>
</property>
</bean>
Ecco la pila di eccezione che sto ottenendo quando faccio il postForObject del RestTemplate. ..
org.springframework.http.converter.HttpMessageNotWritableException: Could not write request: no suitable HttpMessageConverter found for request type [org.springframework.web.multipart.commons.CommonsMultipartFile]
at org.springframework.http.converter.FormHttpMessageConverter.writePart(FormHttpMessageConverter.java:292)
at org.springframework.http.converter.FormHttpMessageConverter.writeParts(FormHttpMessageConverter.java:252)
at org.springframework.http.converter.FormHttpMessageConverter.writeMultipart(FormHttpMessageConverter.java:242)
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:194)
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:1)
at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:588)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:436)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:415)
at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:294)
at com.yoostar.admintool.web.UploadTestController.create(UploadTestController.java:86)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Quindi le mie domande sono:
- È possibile inviare MultipartFile tramite RestTemplate utilizzando POST?
- Esistono alcuni convertitori specifici che devo utilizzare per inviare questo tipo di oggetti? Voglio dire c'è qualche MultipartFileHttpMessageConverter da usare nella mia configurazione?
Tsk tsk, bestemmiare codice? Spero che non entri in produzione. – Spedge