html5+nodejs多文件上传

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最近学习文件上传，网上例子大多数是HTML5+python的，可惜本人不会python，暂时也没有时间和兴趣研究python，所以用node.js做后台接收文件上传。

node server.js 启动项目

index.html

<!DOCTYPE html><html><head>    <title>使用XMLHttpRequest上传文件</title></head><body><form id="form1" enctype="multipart/form-data" method="post" action="upload.php">    <div class="row">        <label for="fileToUpload">Select a File to Upload</label>        <input type="file" name="fileToUpload" id="fileToUpload" onchange="fileSelected();" multiple/>    </div>    <div id="fileName"></div>    <div id="fileSize"></div>    <div id="fileType"></div>    <div class="row">        <input type="button" onclick="uploadFile()" value="Upload" />    </div>    <div id="progressNumber"></div></form><script type="application/javascript" src="upload.js"></script></body></html>

upload.js

function fileSelected() {    var file = document.getElementById('fileToUpload').files[0];    if (file) {        var fileSize = 0;        if (file.size > 1024 * 1024)            fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';        else            fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';        document.getElementById('fileName').innerHTML = 'Name: ' + file.name;        document.getElementById('fileSize').innerHTML = 'Size: ' + fileSize;        document.getElementById('fileType').innerHTML = 'Type: ' + file.type;    }}function uploadFile() {    var xhr = new XMLHttpRequest();    var fd = new FormData();    fd.append("author", "connie");    fd.append("name", "Html 5 File API/FormData");    var files = document.getElementById('fileToUpload').files;    // 单文件上传    // fd.append("fileToUpload", files[0]);    // 多文件上传    for (key in files){        fd.append("fileToUpload", files[key]);    }    /* event listners */    xhr.upload.addEventListener("progress", uploadProgress, false);    xhr.addEventListener("load", uploadComplete, false);    xhr.addEventListener("error", uploadFailed, false);    xhr.addEventListener("abort", uploadCanceled, false);    /* Be sure to change the url below to the url of your upload server side script */    xhr.open("POST", "upload");    xhr.send(fd);}function uploadProgress(evt) {    if (evt.lengthComputable) {        var percentComplete = Math.round(evt.loaded * 100 / evt.total);        document.getElementById('progressNumber').innerHTML = percentComplete.toString() + '%';    }    else {        document.getElementById('progressNumber').innerHTML = 'unable to compute';    }}function uploadComplete(evt) {    /* This event is raised when the server send back a response */    alert(evt.target.responseText);}function uploadFailed(evt) {    alert("There was an error attempting to upload the file.");}function uploadCanceled(evt) {    alert("The upload has been canceled by the user or the browser dropped the connection.");}

server.js

/** * Created by Administrator on 2017/6/5. */var express = require('express'),    path = require('path'),    app = express(),    fs = require('fs'),    multiparty = require('multiparty');  // FormData解析工具var target_path;var config = {    upload_dir: 'uploadfiles'}// 引入静态文件代码app.use(express.static(path.join(__dirname, 'public')));// 文件上传urlapp.post('/upload', function(req, res){    var form = new multiparty.Form();    form.parse(req, function (err, fields, files) {        if (err){           throw err        }        console.log(fields);        console.log(files);        // fields显示非文件类型的所有key、value值        Object.keys(fields).forEach(function(name) {            console.log('got field named ' + name);        });        for (key in files){            files[key].forEach(function (file, index) {                target_path = config.upload_dir + '/' + file.originalFilename;                try {                     // 读取缓存文件，同时写入所需上传的目录                    fs.createReadStream(file.path).pipe(fs.createWriteStream(target_path));                    console.log(file.originalFilename);                    console.log('Upload completed!');                    res.json({infor:"success"})                } catch (err){                    res.json({err:err})                }            })        }    });});app.listen(8080);console.log('Listening on port 8080');

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