vue版本中不能正确的判断类型

[766187397]

{
"openapi": "3.0.0",
"info": {
"title": "NestJS API",
"description": "NestJS API description",
"version": "1.0",
"contact": {}
},
"servers": [],
"paths": {
"/api/upload/file": {
"post": {
"operationId": "UploadController_uploadFile",
"parameters": [],
"requestBody": {
"required": true,
"description": "文件上传",
"content": {
"multipart/form-data": {
"schema": {
"$ref": "#/components/schemas/FileUploadDTO"
}
}
}
},
"responses": {
"201": {
"description": ""
}
},
"summary": "文件上传",
"tags": [
"文件上传"
]
}
}
},
"components": {
"FileUploadDTO": {
"type": "object",
"properties": {
"file": {
"type": "string",
"format": "binary"
}
},
"required": [
"file"
]
}
}
}

请求类型得到的却是：application/json