如何使用GridFS在MongoDB中保存文件

Question

我一直试图将文件上传到我的rest api。但是我无法确定如何获取已发送的文件，无法在正文中找到它。

order by

我应该通过正文发送文件吗？当我要访问该请求的主体时，它的主体不包含该文件。

import React, {Component} from 'react';
import {connect} from 'react-redux';
import {Field, reduxForm} from 'redux-form';
import {bindActionCreators} from 'redux';
import {uploadFile} from "../DashboardActions";

class UploadButton extends Component {

constructor(props) {
    super(props);
    this.handleSubmit = this.handleSubmit.bind(this);
    this.fileInput = React.createRef();
}
handleSubmit(event) {
    event.preventDefault();
    console.log(this.fileInput.current.files[0]);
    this.props.uploadFile(this.fileInput.current.files[0]);
}

render() {
    return (
        <form onSubmit={this.handleSubmit}>
            <label>
                Upload file:
                <input name="file" type="file" ref={this.fileInput} />
            </label>
            <br />
            <button type="submit">Submit</button>
        </form>
    );
}
}

function mapStateToProps(state) {
    return({
        // Nothing in yet
    });
}

function mapDispatchToProps(dispatch) {
    return bindActionCreators({
        uploadFile
    }, dispatch);
}

export default reduxForm({
    form: 'UploadButton2'
})(connect(mapStateToProps, mapDispatchToProps)(UploadButton));

如何将文件传递到multer存储对象中？我无法确定如何访问文件

import axios from 'axios';
import {UPLOAD_SUCCESS, UPLOAD_FAIL} from "../../../actions";

const API_URL = 'http://localhost:8080';

export function uploadFile(file) {
console.log('Triggered upload.');
console.log('File: ', file);
return dispatch => {

    const config = {
        headers: {
            'content-type': 'multipart/form-data'
        }
    };
    axios.post(API_URL + '/files/upload', {
        file: file
        }, config
    ).then((response) => {
        console.log('Upload success', response.data);
        dispatch({type: UPLOAD_SUCCESS, payload: response.data})
    }).catch((error) => {
        console.log(error);
        dispatch({type: UPLOAD_FAIL, payload: 'File couldn\'t be saved'})
    })
};
}

当我想通过axios将数据参数发送到我的rest api时，file参数包含数据，但是一旦进入rest api，我就无法确定文件数据的去向。寻求帮助！