jQuery- und Spring-Boot-Datei-Upload verursacht "Erforderliche Anforderungsteil-Datei ist nicht vorhanden"

Question

Ich habe eine Datei, die ich in meinen Spring-Boot-Microservice hochladen möchte. Ich verwende jQuery, um eine Datei mit dem JavaScript-Objekt FormData zu posten. Spring-boot ruft meinen Endpunkt in meinem Controller nicht auf, weil die FormData-Datei nicht mit einer RequestParam-Datei abgeglichen wurde.

JavaScript:

var name = "TEST"; 
var kml = '<kml><Document><Placemark id="' + name + '"><Point><coordinates>-69.83701518,47.817278750000014</coordinates></Point></Placemark></Document></kml>'; 
// upload the kml file to the server 
var data = new FormData(); 
data.append('file', kml); 
$.ajax({ 
    method: "POST", 
    url: "http://localhost:9096/upload/" + name, 
    data: data, 
    cache: false, 
    contentType: false, 
    processData: false, 
    success: function(data){ 
     console.log("success", name, data); 
    } 
}); 

Hier ist mein Controller-Code:

@RestController 
public class MicroServiceController { 

    private Logger logger = LoggerFactory.getLogger(MicroServiceController.class); 

    @RequestMapping(value="/upload/{name}", method = { RequestMethod.POST }) 
    public ResponseEntity<?> uploadKML(@PathVariable String name, @RequestParam("file") MultipartFile file) throws IOException { 
     logger.debug("Upload: {}", name); 

     return new ResponseEntity<Boolean>(true, HttpStatus.OK); 
    } 
} 

Hier ist die Ausnahme:

2017-02-09 11:45:52.860 DEBUG 5521 --- [nio-9096-exec-1] o.s.b.f.s.DefaultListableBeanFactory  : Returning cached instance of singleton bean 'microServiceController' 
2017-02-09 11:45:52.888 DEBUG 5521 --- [nio-9096-exec-1] .w.s.m.m.a.ServletInvocableHandlerMethod : Failed to resolve argument 1 of type 'org.springframework.web.multipart.MultipartFile' 

org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present 
    at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:193) ~[spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:109) ~[spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:158) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121] 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121] 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.11.jar!/:8.5.11] 
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121] 

2017-02-09 11:45:52.889 DEBUG 5521 --- [nio-9096-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [public org.springframework.http.ResponseEntity<?> com.jasco.microservice.MicroServiceController.uploadKML(java.lang.String,org.springframework.web.multipart.MultipartFile) throws java.io.IOException]: org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present 
2017-02-09 11:45:52.891 DEBUG 5521 --- [nio-9096-exec-1] .w.s.m.a.ResponseStatusExceptionResolver : Resolving exception from handler [public org.springframework.http.ResponseEntity<?> com.jasco.microservice.MicroServiceController.uploadKML(java.lang.String,org.springframework.web.multipart.MultipartFile) throws java.io.IOException]: org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present 
2017-02-09 11:45:52.891 DEBUG 5521 --- [nio-9096-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolving exception from handler [public org.springframework.http.ResponseEntity<?> com.jasco.microservice.MicroServiceController.uploadKML(java.lang.String,org.springframework.web.multipart.MultipartFile) throws java.io.IOException]: org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present 
2017-02-09 11:45:52.891 DEBUG 5521 --- [nio-9096-exec-1] o.s.web.servlet.DispatcherServlet  : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling 
2017-02-09 11:45:52.892 DEBUG 5521 --- [nio-9096-exec-1] o.s.web.servlet.DispatcherServlet  : Successfully completed request 

Und hier ist die Anfrage und Header:

Request URL:http://localhost:9096/upload/TEST 
Request Method:POST 
Status Code:400 
Remote Address:127.0.0.1:9096 

Request Headers: 
    Accept:*/* 
    Accept-Encoding:gzip, deflate, br 
    Accept-Language:en-GB,en-US;q=0.8,en;q=0.6 
    Cache-Control:no-cache 
    Connection:keep-alive 
    Content-Length:273 
    Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryM401einBJzuTMVSj 
    Host:localhost:9096 
    Origin:http://localhost:8090 
    Pragma:no-cache 
    Referer:http://localhost:8090/ 
    User-Agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36 

Request Payload 
------WebKitFormBoundaryM401einBJzuTMVSj 
Content-Disposition: form-data; name="file" 

<kml><Document><Placemark id="TEST"><Point><coordinates>-69.83701518,47.817278750000014</coordinates></Point></Placemark></Document></kml> 
------WebKitFormBoundaryM401einBJzuTMVSj-- 

Und die Antwort JSON:

{"timestamp":1486655346223,"status":400,"error":"Bad Request","exception":"org.springframework.web.multipart.support.MissingServletRequestPartException","message":"Required request part 'file' is not present","path":"/upload/TEST"} 

Für mich sieht es aus wie ich den Namen der Datei auf „Datei“ eingestellt ist, und ich bin auch für „Datei“ in der Micro suchen ... aber es scheint nicht die Verbindung auf der Spring-Boot-Seite zu machen. Ich bin verwirrt, da alles wie die Beispiele und Probleme aussieht, die ich im Internet finde, aber ich bekomme immer noch die Ausnahme.

Alle Vorschläge, was als nächstes zu versuchen, oder wo ich vermasselt ist hilfreich!

Answer 1

Sie verwenden @RequestParam("file") in Ihrer Controller-Methode, so Controller erwartet, dass Ihr file Wert in der Anforderung enthalten ist, wie:

http://localhost:9096/upload/TEST?file=TEST 

Wenn Sie nicht die Datei Parameter als Teil der schicken mögen URL, sollten Sie mit einer anderen Spring-Annotation wie @ModelAttribute versuchen.

Hoffe, dass es hilft,