const formidable = require('formidable');
const fs = require('fs');
const path = require('path');
const Entities = require('html-entities').XmlEntities;
const entities = new Entities();
const filePath = path.resolve(__dirname, '..' + path.sep + 'upload');

module.exports = function(request, response){
    const form = new formidable.IncomingForm();
    return new Promise((resolve, reject) => {
        form.parse(request, (err, fields, files) => {
            const file = files.file;
            const oldpath = file.path;
            const filename = file.name;
            const size = file.size;
            const id = Date.now().toString(36) + Math.random().toString(36).substr(3);
            //获取文件的后缀名
            const extname = path.extname(filename);	 
    
            const shortPath = id + (extname || '');
            const fullPath = filePath + path.sep + shortPath;
            fs.rename(oldpath, fullPath, err => {
                if (err) {
                    reject(err);
                }else {
                    resolve({
                        id: id,
                        name: filename,
                        path: shortPath,
                        size: size
                    })
                }
            })
        })
    });
}