Node -- egg implements the interface of uploading files

1. To configure config > config.default.js

Official documents ：https://www.eggjs.org/zh-CN/basics/controller#%E8%8E%B7%E5%8F%96%E4%B8%8A%E4%BC%A0%E7%9A%84%E6%96%87%E4%BB%B6

config.multipart = {
    
    mode: 'file'
}

2. controller File creation fileController.js

const Controller = require('egg').Controller;
class FileController extends Controller{
    
	async upload() {
    
    	const {
     ctx } = this;
    	let res = await ctx.service.fileService.upload()
    	ctx.body = res
  	}
}
module.exports = FileController

3. service File creation fileService.js

const Service = require('egg').Service;
class FileService extends Service{
    
	async upload(){
    
    	const {
     ctx } = this;
    	const files = ctx.request.files; // Get the information uploaded by the front end files Object group 
    	const filePath = files[0].filepath.replace(/\\\\/g, "\/") // Get the temporary storage address of the file 
    	const fileinfo = fs.readFileSync(filePath); // Read the file 
    	const target = "E:\\development\\myProject\\pc-dev-tool\\upload\\fileName.png"; // Storage address 
    	fs.writeFileSync(target, fileinfo) // write file 
    	fs.unlinkSync(filePath) // Delete temporary storage files 
    	return "ok"
  	}
}
module.exports = FileService