Busboy 上传文件到指定目录，并重命名，node.js

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1，安装busboy ,在该项目下打开命令行（按住shift+右键）

npm install busboy

2，页面：必须含有（

enctype="multipart/form-data"

）

<form class="form form-signin" action="" method="post" id ="myForm" enctype="multipart/form-data"><h1 class="form-signin-heading">上传视频</h1><label for="cName"  class="sr-only"></label><input  id="cName" type="text" maxlength="40" placeholder="课程名称" name="lesson[name]" required autocomplete="false" autofocus /><label for="cNo"  class="sr-only"></label><input type="number" id="cNo" name="lesson[no]" placeholder="目录（第几集）" /><div class="video"><span>添加视频</span><input type="file" name="videoUpload"  id="cVideo"  accept="video/*" /><p class="vBackg"></p></div><input type="submit" value="上传课程视频" class="btn btn-primary btn-block submit" id="sub"/>
</form>

传参：

    var lName = $('#cName').val(),lNo = $('#cNo').val();$('#myForm').attr('action', "/videoUpload?lName="+lName+"&lNo="+lNo) ;

3，后台处理：

3.1，获取前台post过来的参数：

req.query.XXX

其中XXX 就是传过来的参数名，比如localhost：3000?lName=joh,就是lName,获得的就是joh

3.2 处理

router.post('/videoUpload',function(req, res) {//在这里做一个头部数据检查if(!/multipart\/form-data/i.test(req.headers['content-type'])){return res.end('wrong');}var lName,lNo;/*db = mongoose.connect(db_url),*/var  filePath = path.join(path.normalize(__dirname + '/..'), 'public', 'upload');var busboy = new Busboy({ headers: req.headers });
/*    db.connection.on('open', function() {console.log('lesson db connected');});*/busboy.on('file', function (fieldname, file, filename, encoding, mimetype) {console.log('File [' + fieldname + ']: aaa filename: ' + filename);console.log('lName: ' + req.query.lName + "lNo: " + req.query.lNo);lName = req.query.lName;lNo = req.query.lNo;createFlo(lName, filePath);var type = mimetype.toString();var savePath = filePath + '\\' + lName + '\\' + lNo + '.' + type.substr(type.indexOf('/') + 1, type.length);showErr(savePath);file.pipe(fs.createWriteStream(savePath));Lesson.save({lessonName: lName, lNo: lNo, creTime: Date.now()}, function (err) {showErr(err);});console.log('插入数据库成功');file.on('data', function (data) {console.log('File [' + fieldname + '] got ' + data.length + ' bytes');});file.on('end', function () {console.log('File [' + fieldname + '] Finished');});});busboy.on('field', function(fieldname, val, fieldnameTruncated, valTruncated) {console.log('Field [' + fieldname + ']: value: ' + inspect(val));});busboy.on('finish', function() {console.log('Done parsing form!');res.writeHead(200, { 'Connection': 'close' });res.end("That's all folks!");});return req.pipe(busboy);});
function createFlo(lName,filePath){var dirpath =filePath+'\\'+lName;console.log("dirpath "+dirpath);//不存在文件夹，创建if (!fs.existsSync(dirpath)) {fs.mkdirSync(dirpath, 0755);console.log( '文件夹创建成功~');}
}
function  showErr(err) {console.log("info / err: "+ err);
}