使用JS Fetch API上传时，净荷过大错误（413）。通过邮递员工作正常

Question

我有一个多部分上传API，当我通过邮递员上传文件时，它可以完美地工作。然而，当我通过相同的API但使用Fetch API上传时，我得到了413错误。

我尝试了这里给出的解决方案，但没有成功。

我的JS代码如下-

async function uploadAudio(formElements) {

    const formData = new FormData();
    const file = fileUploadField.files[0];
    formData.append("file", file);

    console.log("Name: " + file.name); // Prints the correct file name
    console.log("Size: " + file.size); // Prints the correct size (which is < than what is set server side)

    const options = {
          method: 'POST',
          body: formData,
          headers: {
            'Content-Type': 'multipart/form-data',
            'Accept': 'application/json',
            'Authorization': 'Bearer ' + authTokenArr[0]
          }
        };

    const response = await fetch(base_url + "/audio/file", options);
    const data = await response.json();

    if (response.ok) {
        handleSuccess(data);
    } else {
        handleFail(data);
    }
} 

应用程序。属性文件-

# max file size
spring.servlet.multipart.max-file-size=10MB
# max request size
spring.servlet.multipart.max-request-size=10MB 

Rest控制器-

@PostMapping("file", produces = [ProduceTypes.JSON])
    fun uploadAudio(@RequestParam("file") file: MultipartFile,
                      @RequestHeader (name="Authorization") token: String): ResponseEntity<MutableMap<String, Any>> {

        val user: User = userService.getUserDetailsByToken(token)

        val body: MutableMap<String, Any> = LinkedHashMap()
        body["status"] = ApiStatus.UPLOADED
        body["fileId"] = podcastFileService.uploadFileToB2(user, file)

        return ResponseEntity(body, HttpStatus.CREATED)
    }

这是我的服务器端日志-

2020-09-03 18:56:02.288 DEBUG 40716 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet        : POST "/audio/file", parameters={}
2020-09-03 18:56:02.293 DEBUG 40716 --- [nio-8080-exec-7] .m.m.a.ExceptionHandlerExceptionResolver : Using @ExceptionHandler com.krtkush.audiotime.globalexceptions.GlobalExceptionHandler#handleMultipartException(MultipartException)
2020-09-03 18:56:02.356 DEBUG 40716 --- [nio-8080-exec-7] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Using 'application/json', given [application/json] and supported [application/json, application/*+json, application/json, application/*+json]
2020-09-03 18:56:02.357 DEBUG 40716 --- [nio-8080-exec-7] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Writing [{timestamp=2020-09-03T18:56:02.297867, message=Maximum file size acceptable is 10MB}]
2020-09-03 18:56:02.364 DEBUG 40716 --- [nio-8080-exec-7] .m.m.a.ExceptionHandlerExceptionResolver : Resolved [org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found]
2020-09-03 18:56:02.364 DEBUG 40716 --- [nio-8080-exec-7] o.s.web.servlet.DispatcherServlet        : Completed 413 PAYLOAD_TOO_LARGE

当API通过Postman正常工作时，甚至当使用带有非REST控制器的mustache模板上传时，为什么会出现大小问题。

Answer 1

原来问题出在“内容类型”：“多部分/表单数据”。当我把它取下来时，它起作用了。@Kostiantyn的评论帮助了我。