express文件上传

安装express，创建项目，添加sqlite3模块

express --sessions --css stylus --ejs myhotel
npm install sqlite3
node app #运行方式

源代码如下：

网站入口app.js

var express = require('express');
var routes = require('./routes');
var photo = require('./routes/photo');
var http = require('http');
var path = require('path');

var app = express();

// all environments
app.set('port', process.env.PORT || 80);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.bodyParser({ keepExtensions: true, uploadDir: __dirname + '/uploads' } ));
app.use(express.methodOverride());
app.use(express.cookieParser('your secret here'));
app.use(express.session());
app.use(app.router);
app.use(require('stylus').middleware(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));

// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

app.get('/', routes.index);
app.post('/upload', photo.upload);
app.get('/list', photo.list);

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

connect.bodyParser()会有报错，替换如下

var multipart = require('connect-multiparty');

app.use(express.urlencoded()); // Replace for depricated connect.bodyParser()
app.use(express.json()); // Replace for depricated connect.bodyParser()
app.use(multipart({ uploadDir: __dirname + '/uploads' })) // Replace for depricated connect.bodyParser()

控制与路由

routes/index.js

exports.index = function(req, res){
        res.render('index', { title: 'Express' });
};

routes/photo.js

var sqlite3 = require("sqlite3"),
    fs  = require("fs");

var db = new sqlite3.Database("photos.db");
/*
 * GET users listing.
 */

exports.list = function(req, res){

        var photos = [];
        db.serialize(function() {
                db.each("SELECT name, path FROM photos", function(err, row) {
                        photos.push({name: row.name, path:row.path})
                        }, function(){
                        res.render("photos",{photos:photos})
                        });
                });
};

exports.upload = function(req, res){

        var name = req.param('name', null);

        fs.readFile(req.files.image.path, function (err, data) {
                // ...
                if(err) {throw err;}

                var hash = require('crypto').createHash('md5');
                var target_path = 'images/uploads/' + hash.update(data+"").digest('hex') + "." + req.files.image.name.split(".")[1];

                fs.writeFile("./public/"+ target_path, data, function (err) {
                        if(err) {throw err;}

                        db.serialize(function() {
                                var stmt = db.prepare("INSERT INTO photos VALUES (?,?)");
                                stmt.run(name,target_path);
                                stmt.finalize();
                                res.redirect("/list");
                        });
//                      db.close();
                });
        });
};

视图代码

view/index.ejs

<!DOCTYPE html>
<html>
<head></head>

<body>
<form enctype="multipart/form-data" action="/upload" method="POST">
<input type="text" id="name" name="name"></input>
Send this file: <input name="image" id="image" type="file" />
<input name="tt" type="submit" value="Send File" />
</form>

</body>
</html>

view/photos.ejs

<!DOCTYPE html>
<html>
  <head>
    <title>AB</title>
    <link rel='stylesheet' href='/stylesheets/style.css' />
  </head>
  <body>
    <ul class="nostyle">
      <% photos.forEach(function(photo){ %>
      <li><%= photo.name %> <img src="<%= photo.path %>" /></li>
      <% }) %>
    </ul>
  </body>
</html>

样式控制public/stylesheets/style.styl

body
  padding: 50px
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif
a
  color: #00B7FF
.nostyle
  list-style-type: circle
posted @ 2013-12-02 21:51  ciaos  阅读(823)  评论(0)  编辑  收藏  举报