节点/快速文件上传

一尘不染

节点/快速文件上传

node.js

我正在使用节点v0.10.26并表示v4.2.0，而我对节点还很新。在过去三个多小时的时间里，我一直在想着要在节点上使用文件上传表单，这是我的头。在这一点上，我只是试图让req.files不返回未定义。我的观点看起来像这样

<!DOCTYPE html>
<html>
<head>
  <title>{{ title }}</title>
  <link rel='stylesheet' href='/stylesheets/style.css' />
</head>
<body>
  <h1>{{ title }}</h1>
  <p>Welcome to {{ title }}</p>
  <form method='post' action='upload' enctype="multipart/form-data">
    <input type='file' name='fileUploaded'>
    <input type='submit'>
  </form>
</body>
</html>

这是我的路线

var express = require('express');
var router = express.Router();


/* GET home page. */
router.get('/', function(req, res) {
  res.render('index', { title: 'Express' });
});

router.post('/upload', function(req, res){
console.log(req.files);
});

module.exports = router;

这是我的app.js

var express = require('express');
var path = require('path');
var favicon = require('static-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hjs');

app.use(favicon());
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

/// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

/// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});



module.exports = app;

我看到了其中包含的内容methodOverride()，bodyParser({keepExtensions:true,uploadDir:path})应该可以提供帮助，但是如果添加这些行，我什至无法启动服务器。

阅读 304

2020-07-07

共1个答案

一尘不染

ExpressJS问题：

大多数中间件已从express
4中删除。签出：http :
//www.github.com/senchalabs/connect#middleware
对于多部分中间件，如busboy，busboy-connect，强大，流程，parted是必需的。

此示例使用 connect-busboy 中间件工作。创建/ img和/ public文件夹。
使用文件夹结构：

\ server.js

\ img \“资料上传到的位置”

\ public \ index.html

SERVER.JS

var express = require('express');    //Express Web Server 
var busboy = require('connect-busboy'); //middleware for form/file upload
var path = require('path');     //used for file path
var fs = require('fs-extra');       //File System - for file manipulation

var app = express();
app.use(busboy());
app.use(express.static(path.join(__dirname, 'public')));

/* ========================================================== 
Create a Route (/upload) to handle the Form submission 
(handle POST requests to /upload)
Express v4  Route definition
============================================================ */
app.route('/upload')
    .post(function (req, res, next) {

        var fstream;
        req.pipe(req.busboy);
        req.busboy.on('file', function (fieldname, file, filename) {
            console.log("Uploading: " + filename);

            //Path where image will be uploaded
            fstream = fs.createWriteStream(__dirname + '/img/' + filename);
            file.pipe(fstream);
            fstream.on('close', function () {    
                console.log("Upload Finished of " + filename);              
                res.redirect('back');           //where to go next
            });
        });
    });

var server = app.listen(3030, function() {
    console.log('Listening on port %d', server.address().port);
});

INDEX.HTML

<!DOCTYPE html>
<html lang="en" ng-app="APP">
<head>
    <meta charset="UTF-8">
    <title>angular file upload</title>
</head>

<body>
        <form method='post' action='upload' enctype="multipart/form-data">
        <input type='file' name='fileUploaded'>
        <input type='submit'>
 </body>
</html>

以下将适用于强大的 SERVER.JS

var express = require('express');   //Express Web Server 
var bodyParser = require('body-parser'); //connects bodyParsing middleware
var formidable = require('formidable');
var path = require('path');     //used for file path
var fs =require('fs-extra');    //File System-needed for renaming file etc

var app = express();
app.use(express.static(path.join(__dirname, 'public')));

/* ========================================================== 
 bodyParser() required to allow Express to see the uploaded files
============================================================ */
app.use(bodyParser({defer: true}));
 app.route('/upload')
 .post(function (req, res, next) {

  var form = new formidable.IncomingForm();
    //Formidable uploads to operating systems tmp dir by default
    form.uploadDir = "./img";       //set upload directory
    form.keepExtensions = true;     //keep file extension

    form.parse(req, function(err, fields, files) {
        res.writeHead(200, {'content-type': 'text/plain'});
        res.write('received upload:\n\n');
        console.log("form.bytesReceived");
        //TESTING
        console.log("file size: "+JSON.stringify(files.fileUploaded.size));
        console.log("file path: "+JSON.stringify(files.fileUploaded.path));
        console.log("file name: "+JSON.stringify(files.fileUploaded.name));
        console.log("file type: "+JSON.stringify(files.fileUploaded.type));
        console.log("astModifiedDate: "+JSON.stringify(files.fileUploaded.lastModifiedDate));

        //Formidable changes the name of the uploaded file
        //Rename the file to its original name
        fs.rename(files.fileUploaded.path, './img/'+files.fileUploaded.name, function(err) {
        if (err)
            throw err;
          console.log('renamed complete');  
        });
          res.end();
    });
});
var server = app.listen(3030, function() {
console.log('Listening on port %d', server.address().port);
});

2020-07-07