java - 带有应用程序/八位字节流的spring boot multipartFile抛出异常

Question

我想使用 Spring boot 构建一个简单的 Rest api，它接受任何给定的文件，然后对其执行一些操作。我在 multipartFile https://spring.io/guides/gs/uploading-files/ 上浏览了 spring 示例我决定采用相同的方法。将通过我的 rest api 上传的文件将具有一些特定的扩展名。所以，我将内容类型指定为 application/octet-stream 。当我尝试运行我的单元测试用例时，我总是异常(exception)

nested exception is org.springframework.web.multipart.MultipartException: The current request is not a multipart request

如果内容类型是text/plain或者requestMapping中没有'consumes'参数，则不会出现这个异常。

我的 Controller 代码如下所示:

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.multipart.MultipartFile;

@Controller
@RequestMapping("/v1/sample")
public class SampleController {

    private static Logger log = LoggerFactory.getLogger(SampleController.class);

    @RequestMapping(path = "/{id}/upload",
                    consumes = {MediaType.APPLICATION_OCTET_STREAM_VALUE},
                    method = RequestMethod.POST)
    public ResponseEntity<String> uploadfile(@PathVariable String id,
            @RequestParam("file") MultipartFile upgradeFile) {
        log.info("Obtained a upload request for the id {}",id );
        return new ResponseEntity<String>("file upload has been accepted.",
                HttpStatus.ACCEPTED);
    }

}

我的单元测试片段如下:

import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.fileUpload;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppContextSetup;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.http.MediaType;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

import com.stellapps.devicemanager.fota.Application;

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@SpringApplicationConfiguration(classes = Application.class)
@EnableWebMvc
public class ControllerTest {

    @Autowired
    private WebApplicationContext webApplicationContext;

    private MockMvc mockMvc;

    @Before
    public void mockMvcBuilder() {
        this.mockMvc = webAppContextSetup(webApplicationContext).build();
    }

    @Test
        public void test_ValidPayload() {
            String uri = "/v1/sample/1234/upload";
            Path path = Paths.get("src/test/resources/someFile");
            try {
                byte[] bytes = Files.readAllBytes(path);
                 MockMultipartFile multipartFile =
                            new MockMultipartFile("file", "someFile.diff", "application/octet-stream", bytes);
                 mockMvc.perform(fileUpload(uri).file(multipartFile).contentType(MediaType.APPLICATION_OCTET_STREAM_VALUE))
                    .andExpect(status().isAccepted());
            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
}

如果我使用 text/plain 作为内容类型，并且我提供一个普通的文本文件，它会顺利进行。如果我将内容类型添加为 application/octet-stream，它会抛出以下异常

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.springframework.web.multipart.MultipartException: The current request is not a multipart request
    at org.springframework.web.servlet.mvc.method.annotation.RequestPartMethodArgumentResolver.assertIsMultipartRequest(RequestPartMethodArgumentResolver.java:204)
    at org.springframework.web.servlet.mvc.method.annotation.RequestPartMethodArgumentResolver.resolveArgument(RequestPartMethodArgumentResolver.java:129)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:99)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:161)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968)

如何让我的请求接受 application/octet-stream 以及我应该对测试用例进行哪些更改以确保它成功。

更新:

删除 consumes header 并且不在 MockPartFile 中指定内容类型是上传文件的一种方式。我想默认情况下 Controller 将它作为 application/octet-stream

更新:

感谢您的回复。我使用的是较早版本的 spring (1.3.1)，在完成答案后，我更新了我的 spring 版本和测试用例以匹配它，它开始工作了。

Answer 1

尝试以下步骤

• 从 RequestMapping 属性中删除consumes。
• MockMultipartFile multipartFile = new MockMultipartFile("file","somename","multipart/form-data", fileinputstream);

• 更改为 MockMvc:

  mockMvc.perform(MockMvcRequestBuilders.fileUpload("/v1/sample/1234/payload")                
              .file(multipartFile)
              .andExpect(status().isOk());
  

求助检查 Upload file using Spring mvc and MockMVC

编辑:

我已经在您的场景中尝试了一个示例 spring-boot-rest 应用程序。似乎 application/octet-stream 没有问题。请检查我的仓库 https://github.com/satya-j/boot-file-manager