I am writing two applications that should communicate over REST. Both applications are SpringBoot applications. The most web services are working fine but I have some problems with the uploading of a file. This is my rest controller:
@RestController
@RequestMapping(PathConstants.SERVER_PACKAGING_INTERFACE + "/**")
public class PackagingCommunication {
//@PostMapping(PathConstants.SERVER_UPLOAD_FILE)
@RequestMapping(name = PathConstants.SERVER_UPLOAD_FILE, method = RequestMethod.POST, headers=("content-type=multipart/*"))
public ResponseEntity<String> uploadFileInStorage(@RequestParam("file") MultipartFile file,
RedirectAttributes redirectAttributes) {
try {
InputStream inputStream = file.getInputStream();
String fileName = file.getOriginalFilename();
//storageService.saveInputStreamInStorage(inputStream, fileName);
return ResponseEntity.status(HttpStatus.OK).build();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
}
}
}
My client with rest template:
public void uploadeFileToStorage(File file, String serverUrl) {
try{
final MultiValueMap<String, Object> parameterMap = createMultipartFileParam(file.getAbsolutePath());
parameterMap.add("file", file);
HttpHeaders headers = new HttpHeaders();
//headers.set("Content-Type", "multipart/form-data");
//headers.set("Accept", "text/plain");
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
String url = serverUrl + PathConstants.SERVER_PACKAGING_INTERFACE + PathConstants.SERVER_UPLOAD_FILE;
restTemplate = getRestTemplate();
ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, new HttpEntity<MultiValueMap<String, Object>>(parameterMap, headers),
String.class);
System.out.println(response.getHeaders().getAccept());
} catch(Exception ex) {
System.out.println(ex.getMessage());
} finally {
// Delete the file from the temporary directory of the client.
file.delete();
}
}
I get a http error code 400. The commented lines show statements I tried to solve the problem. Then I wrote a html formular for trying to communicate with the web service without my Java program.
<html>
<body>
<div>
<form method="POST" enctype="multipart/form-data" action="http://localhost:9292/serverPackaging/uploadFile">
<table>
<tr><td>File to upload:</td><td><input type="file" name="file" /></td></tr>
<tr><td></td><td><input type="submit" value="Upload" /></td></tr>
</table>
</form>
</div>
</body>
</html>
It does also not work. I get the error "Required request part 'file' is not present". I don't know what to do. The html formular is not important. Really important is the communication between the two applications with the help of rest template.
Here is the stacktrace:
org.springframework.web.client.HttpClientErrorException: 400 null
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:700)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:653)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:531)
at de.feu.kdmp4.packagingtoolkit.client.operations.classes.ServerCommunicationOperationsImpl.uploadeFileToStorage(ServerCommunicationOperationsImpl.java:314)
at de.feu.kdmp4.packagingtoolkit.client.operations.facade.OperationsFacade.uploadeFileToStorage(OperationsFacade.java:49)
at de.feu.kdmp4.packagingtoolkit.client.service.classes.ArchiveServiceImpl.addFileReference(ArchiveServiceImpl.java:69)
at de.feu.kdmp4.packagingtoolkit.client.service.facades.ServiceFacade.addFileReference(ServiceFacade.java:48)
at de.feu.kdmp4.packagingtoolkit.client.view.prime.managedBeans.InformationPackageCreationBean.createInformationPackage(InformationPackageCreationBean.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstValue.invoke(AstValue.java:247)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:149)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:814)
at javax.faces.component.UICommand.broadcast(UICommand.java:300)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:108)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:115)
at org.springframework.boot.web.support.ErrorPageFilter.access$000(ErrorPageFilter.java:59)
at org.springframework.boot.web.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:90)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
´
Does anyone have an idea what I am doing wrong?
Thanks, Christopher
Adjust your @RequestMapping annotation. Replace name field with value
Below is an example which works for me quite well, maybe it can help you. Just ignore the context for the code example:
@PostMapping("/recipe/{id}/image")
public String handleImagePost(@PathVariable String id,
@RequestParam("file") MultipartFile file) {
log.debug("received a file for recipe with id: " + recipeId);
try{
Recipe recipe = recipeRepository.findById(recipeId).get();
Byte[] byteObjects = new Byte[file.getBytes().length];
int i = 0;
for(byte b: file.getBytes()){
byteObjects[i++] = b;
}
recipe.setImage(byteObjects);
recipeRepository.save(recipe);
}catch(IOException e){
log.error("Error occured while persisting the file. " + e);
e.printStackTrace();
}
return "redirect:/recipe/" + id + "/show";
}
And the corresponding HTML:
<form action="http://localhost/recipe/1/image" method="post" enctype="multipart/form-data">
<label class="control-label">Select File</label>
<input id="file" name="file" type="file" class="file">
<button type="submit" class="btn btn-primary">Submit</button>
</form>