Nodejs+express makes file upload
This time I will bring you nodejs express to upload files. What are the precautions for nodejs express to upload files? The following is a practical case, let’s take a look.
The example in this article describes how nodejs implements file upload based on express. I would like to share it with you for your reference. The details are as follows:
When I was working on a personal project some time ago, I used the nodejs server to upload files. Now I will summarize this as a record.
When I upload files, I use express's multiparty. Of course, it can also be implemented using the connect-multiparty middleware, but the official does not seem to recommend the use of connect-multiparty middleware. Without further ado, let’s look at the code below.
Steps:
(1) Use express to create a project. The jade template engine is used by default, but I am still used to html, so I changed it to html template.
(2) In the project directory, install the necessary components through npm install multiparty.
(3) Modify views/index.html and add a file upload form.
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>上传文件</title> </head> <body> 上传文件 <form method='post', action='/file/uploading', enctype='multipart/form-data'> <input type="file" name="inputFile"> <input type="submit" value="上传"> </form> </body> </html>
(4) Modify routes/index.js to implement the background code for uploading pages and uploading responses.
var express = require('express');
var router = express.Router();
var multiparty = require('multiparty');
var util = require('util');
var fs = require('fs');
/* 上传页面. */
router.get('/', function(req, res, next) {
//res.render('./views/index');
res.sendfile('./views/index.html');
});
/* 上传 */
router.post('/file/uploading', function(req, res, next) {
/* 生成multiparty对象，并配置上传目标路径 */
var form = new multiparty.Form();
/* 设置编辑 */
form.encoding = 'utf-8';
//设置文件存储路劲
form.uploadDir = './public/files';
//设置文件大小限制
form.maxFilesSize = 2 * 1024 * 1024;
// form.maxFields = 1000; //设置所有文件的大小总和
//上传后处理
form.parse(req, function(err, fields, files) {
var filesTemp = JSON.stringify(files, null, 2);
if(err) {
console.log('parse error:' + err);
}else {
console.log('parse files:' + filesTemp);
var inputFile = files.inputFile[0];
var uploadedPath = inputFile.path;
var dstPath = './public/files' + inputFile.originalFilename;
//重命名为真实文件名
fs.rename(uploadedPath, dstPath, function(err) {
if(err) {
console.log('rename error:' + err);
}else {
console.log('rename ok');
}
})
}
res.writeHead(200, {'content-type': 'text/plain;charset=utf-8'});
res.write('received upload:\n\n');
res.end(util.inspect({fields: fields, files: filesTemp}))
})
})
module.exports = router;I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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The above is the detailed content of Nodejs+express makes file upload. For more information, please follow other related articles on the PHP Chinese website!
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