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node express formidable 文件上传后修改文件名

//我是用php的思想来学习nodejs

var
express = require(‘express‘);var router = express.Router();var fs = require(‘fs‘);var path= require("path");var formidable = require(‘formidable‘);/* GET home page. */router.get(‘/‘, function(req, res, next) { res.render(‘index‘, { title: ‘Express+EJS+mysql+s2‘ });});router.post(‘/file-upload‘, function(req, res, next) { console.log(‘开始文件上传....‘); var form = new formidable.IncomingForm(); //设置编辑 form.encoding = ‘utf-8‘; //设置文件存储路径 form.uploadDir = "./public/images/"; //保留后缀 form.keepExtensions = true; //设置单文件大小限制 form.maxFieldsSize = 2 * 1024 * 1024; //form.maxFields = 1000; 设置所以文件的大小总和 form.parse(req, function(err, fields, files) { //console.log(fields); console.log(files.thumbnail.path); console.log(‘文件名:‘+files.thumbnail.name); var t = (new Date()).getTime(); //生成随机数 var ran = parseInt(Math.random() * 8999 +10000); //拿到扩展名 var extname = path.extname(files.thumbnail.name); //path.normalize(‘./path//upload/data/../file/./123.jpg‘); 规范格式文件名 var oldpath = path.normalize(files.thumbnail.path); //新的路径 let newfilename=t+ran+extname; var newpath = ‘./public/images/‘+newfilename; console.warn(‘oldpath:‘+oldpath+‘ newpath:‘+newpath); fs.rename(oldpath,newpath,function(err){ if(err){ console.error("改名失败"+err); } res.render(‘index‘, { title: ‘文件上传成功:‘, imginfo: newfilename }); }); //res.end(util.inspect({fields: fields, files: files})); }); });/* supervisor ./bin/www */module.exports = router;
<!DOCTYPE html><html><head><title><%= title %></title><link rel=’stylesheet’ href=’/stylesheets/style.css’ /></head><body><h5>这里变量没有输出但没有报销:<%= locals.title %></h5><p>Welcome to <%= title %></p><img src=‘./images/<%= locals.imginfo %>‘ width=‘200‘/><form method="post" enctype="multipart/form-data" action="/file-upload">  <input type="text" name="username">  <input type="password" name="password">  <input type="file" name="thumbnail">  <input type="submit"></form></body></html>

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node express formidable 文件上传后修改文件名