Question

我在互联网上看到了许多有关从 Spring-Boot Rest Template 发送 multi-part 请求的示例，但实际上对我没有任何帮助，但我总是最终得到一个400错误的请求。我不确定错误是否与我用来存储文件详细信息的FileSystemResource类有关。

这是我的控制器类。

@RequestMapping(method = RequestMethod.POST, consumes = { "multipart/form-data" },value = "/submit")
public ResponseEntity securedAcceptJob(
              @RequestParam(value = "files" , required = false)MultipartFile multipartFile,
              @RequestParam(value = "name" , required = true) String name
              ) throws NotInitializedException,CouldNotSendException {}


public void submitResponse(SrResultEntity srResultEntity){
    String path = "des/submit";
    LinkedMultiValueMap<String,Object> requestEntity = new LinkedMultiValueMap<>();
    requestEntity.add("name",srResultEntity.getTitle());
    requestEntity.add("files",getUserFileResource());

    HttpHeaders headers = new HttpHeaders();
    headers.set(HttpHeaders.ACCEPT,MediaType.APPLICATION_JSON_UTF8_VALUE);
    headers.setContentType(MediaType.MULTIPART_FORM_DATA);

    HttpEntity<LinkedMultiValueMap<String,Object>> httpEntity = new HttpEntity(requestEntity, headers);

    URI uri = UriComponentsBuilder.fromUriString(buildPath(path)).buildAndExpand(pathVariables).toUri();

    final ResponseEntity<String> stringResponseEntity =
        restClientHelper.getRestTemplate().exchange(uri,HttpMethod.POST, httpEntity, String.class);
}

public static Resource getUserFileResource() throws IOException {
        //todo replace tempFile with a real file
        Path tempFile = Files.createTempFile("upload-test-file", ".txt");
        Files.write(tempFile, "some test content...\nline1\nline2".getBytes());
        System.out.println("uploading: " + tempFile);
        File file = tempFile.toFile();
        //to upload in-memory bytes use ByteArrayResource instead
        return new FileSystemResource(file);
    }

我无法弄清楚我应该在代码中更改什么，这是我调试应用程序时的输出。

<{名称= [dwad]，消息= [空]，电子邮件= [m@yhaoo.com]，文件= [文件[/tmp/upload-test-file5318593104290391569.txt]]}，{ Accept = [application / json; charset = UTF-8]，X-Auth-Token = [6ce45ed4-3278-4531-98fa-fe5949000380]，Content-Type = [multipart / form-data]}> < / p>

即使我没有在请求中发送文件，错误仍然存在。

堆栈跟踪：

org.springframework.web.client.HttpClientErrorException：400错误要求 org.springframework.web.client.DefaultResponseErrorHandler.handleError（DefaultResponseErrorHandler.java:94）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 org.springframework.web.client.DefaultResponseErrorHandler.handleError（DefaultResponseErrorHandler.java:79）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 org.springframework.web.client.ResponseErrorHandler.handleError（ResponseErrorHandler.java:63）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 org.springframework.web.client.RestTemplate.handleResponse（RestTemplate.java:766）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 org.springframework.web.client.RestTemplate.doExecute（RestTemplate.java:724）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 org.springframework.web.client.RestTemplate.execute（RestTemplate.java:698）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 org.springframework.web.client.RestTemplate.exchange（RestTemplate.java:619）〜[spring-web-5.0.8.RELEASE.jar：5.0.8.RELEASE]在 com.itesco.sam2.restclient.RestServiceClient.multiPartPost（RestServiceClient.java:52）〜[classes /：na]在 com.itesco.sam2.restclient.des.DesServiceClient.submitResponse（DesServiceClient.java:131）〜[classes /：na]在 com.itesco.sam2.ui.views.des.FileListView.sendReplies（FileListView.java:149）〜[classes /：na]在 com.itesco.sam2.ui.views.AbstractEditorDialog.saveClicked（AbstractEditorDialog.java:202）〜[classes /：na]在 com.itesco.sam2.ui.views.AbstractEditorDialog.lambda $ open $ cc13c671 $ 1（AbstractEditorDialog.java:191）〜[classes /：na]在 com.vaadin.flow.component.ComponentEventBus.fireEvent（ComponentEventBus.java:132）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.component.ComponentEventBus.handleDomEvent（ComponentEventBus.java:326）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.component.ComponentEventBus.lambda $ addDomTrigger $ 5ee67f2b $ 1（ComponentEventBus.java:190）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.internal.nodefeature.ElementListenerMap.lambda $ fireEvent $ 2（ElementListenerMap.java:378）〜[流服务器-1.0.0.jar：na]在 java.util.ArrayList.forEach（ArrayList.java:1257）〜[na：1.8.0_171]在 com.vaadin.flow.internal.nodefeature.ElementListenerMap.fireEvent（ElementListenerMap.java:378）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.server.communication.rpc.EventRpcHandler.handleNode（EventRpcHandler.java:58）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.server.communication.rpc.AbstractRpcInvocationHandler.handle（AbstractRpcInvocationHandler.java:63）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.server.communication.ServerRpcHandler.handleInvocationData（ServerRpcHandler.java:377）〜[流服务器-1.0.0.jar：na]在 com.vaadin.flow.server.communication.ServerRpcHandler.lambda $ handleInvocations $ 0（ServerRpcHandler.java:367）〜[流服务器-1.0.0.jar：na]在 java.util.ArrayList.forEach（ArrayList.java:1257）〜[na：1.8.0_171]

使用springboot rest客户端发送多部分请求始终会产生400 BAD_REQUEST错误

0 个答案: