Spring Boot 多部分文件始终为空 [英] Spring Boot multipartfile always null
问题描述
我在 Spring Boot Stormpath 1.0.2 中使用 Spring Boot version = '1.4.0.RC1'.
I am using Spring Boot version = '1.4.0.RC1' with Spring Boot Stormpath 1.0.2.
我正在尝试使用分段文件上传，但控制器中的 MultipartFile 始终为空.
I am trying to use multipart file upload but the MultipartFile is always null in the controller.
当我使用@RequestPart("file") 时，信息:"status":400,"error":"Bad Request","exception":"org.springframework.web.multipart.support.MissingServletRequestPartException","message":"所需的请求部分'文件'不存在"
When I use @RequestPart("file") the info: "status":400,"error":"Bad Request","exception":"org.springframework.web.multipart.support.MissingServletRequestPartException","message":"Required request part 'file' is not present"
当我使用@RequestPart(name = "file", required = false) 时，该部分始终为空.
When I use @RequestPart(name = "file", required = false), the part is always null.
但是，如果我向控制器添加一个 HttpServletRequest 参数，我可以直接从请求中获取文件部分，所以我知道它确实存在.
However, if I add an HttpServletRequest argument to the controller, I can get the file part directly from the request, so I know that it is actually present.
这是控制器，在下面的代码中 checkNotNull(part) 总是成功而 checkNotNull(imageFile) 总是失败:
This is the controller and in the code below checkNotNull(part) always succeeds and checkNotNull(imageFile) always fails:
@PostMapping("{username}/profilePhoto")
public ResponseEntity<?> saveProfilePhoto(@PathVariable("username") String username,
@RequestPart(name = "file", required = false) MultipartFile imageFile,
HttpServletRequest request) {
try {
Part part = request.getPart("file");
checkNotNull(part);
checkNotNull(imageFile);
} catch (IOException | ServletException ex) {
throw InternalServerErrorException.create();
}
// Transfer the multipart file to a temp file
File tmpFile;
try {
tmpFile = File.createTempFile(TMP_FILE_PREFIX, null);
imageFile.transferTo(tmpFile);
} catch (IOException ex) {
log.error("Failed to create temp file", ex);
throw InternalServerErrorException.create();
}
// Execute the use case
updateUserProfilePhoto.execute(username, tmpFile);
// Delete the temp file
FileUtils.deleteQuietly(tmpFile);
return ResponseEntity.status(HttpStatus.CREATED).build();
}
我的集成测试使用改造:
My integration test uses retrofit:
@Multipart
@POST("users/{username}/profilePhoto")
Call<Void> uploadProfilePhoto(@Path("username") String username,
@Part("file") RequestBody profilePhoto);
...
@Test
public void saveProfilePhoto_shouldSavePhoto() throws IOException {
// Given
String usernamme = usernames[0];
Resource testImageResource = context.getResource("classpath:images/test_image.jpg");
File imageFile = testImageResource.getFile();
RequestBody body = RequestBody.create(okhttp3.MediaType.parse("image/*"), imageFile);
// When
Response<Void> response = getTestApi().uploadProfilePhoto(usernamme, body).execute();
// Then
assertThat(response.code()).isEqualTo(201);
}
我使用自动配置，所以我唯一的自定义配置类配置 Stormpath:
I am using auto configuration so my only custom config class configures Stormpath:
@Configuration
public class SpringSecurityWebAppConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.apply(stormpath());
}
}
更新:这是传出请求.我不确定如何启用多部分解析器本身的日志记录.
UPDATE: This is the outgoing request. I am not sure how to enable logging in the multipart resolver itself.
2016-08-18 14:44:14.714 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : --> POST http://localhost:8080/users/user1/profilePhoto http/1.1
2016-08-18 14:44:14.714 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : Content-Type: multipart/form-data; boundary=fe23ef21-3413-404c-a260-791c6921b2c6
2016-08-18 14:44:14.715 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : Content-Length: 181212
2016-08-18 14:44:14.715 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : Accept: application/json
2016-08-18 14:44:14.715 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : Authorization: Bearer [token]
2016-08-18 14:44:14.715 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 :
2016-08-18 14:44:14.735 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : --fe23ef21-3413-404c-a260-791c6921b2c6
Content-Disposition: form-data; name="file"
Content-Transfer-Encoding: binary
Content-Type: image/*
Content-Length: 180999
file data
--fe23ef21-3413-404c-a260-791c6921b2c6--
2016-08-18 14:44:14.762 DEBUG 13088 --- [ main] c.t.server.web.testutil.TestConfig$1 : --> END POST (181212-byte body)
对正在发生的事情有什么想法吗?
Any ideas on what is happening?
推荐答案
我发现问题在于我使用 Retrofit 构建请求的方式.
I found out that the problem was the way I was building my request with Retrofit.
Spring 的 multipart 解析器要求文件的文件名出现在部件的 content-disposition 字段中.没有这个，它不会将文件添加到多部分请求中.
Spring's multipart resolver requires the filename for the file to be present in content-disposition field of the part. Without this, it doesn't add the file into the multipart request.
根据此处找到的信息:https://futurestud.io/blog/retrofit-2-how-to-upload-files-to-server，我的API接口应该是:
According to the info found here: https://futurestud.io/blog/retrofit-2-how-to-upload-files-to-server, my API interface should be:
@Multipart
@POST("users/{username}/profilePhoto")
Call<Void> uploadProfilePhoto(@Path("username") String username,
@Part MultipartBody.Part profilePhoto);
然后在我的测试中拨打电话时:
And then when making the call in my test:
// Given
String usernamme = usernames[0];
Resource testImageResource = context.getResource("classpath:images/test_image.jpg");
File imageFile = testImageResource.getFile();
RequestBody requestFile = RequestBody.create(MediaType.parse("multipart/form-data"), imageFile);
MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", imageFile.getName(), requestFile);
// When
Response<Void> response = testApi.uploadProfilePhoto(usernamme, filePart).execute();
这篇关于Spring Boot 多部分文件始终为空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
