问NodeJs/Formidable，上传图片错误
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Stack Overflow用户

提问于 2014-03-29 15:38:22

回答 1查看 2.1K关注 0票数 2

我正在尝试使用NodeJs和Formidable制作一个图像/文件上传表单。我没有用快递。令人敬畏。但不管怎么说，我用formidable尝试了最常见的脚本，没有一个worked.My代码与本教程中的完全相同：http://justinkjchang.wordpress.com/2013/11/08/image-uploader-using-node-js/周围有很多这样的教程，我在一些书或视频中看到了几乎完全相同的东西，它们似乎都能工作，除了我的。我已经安装了formidable，并且我有它和Node的最新版本。我也在苹果电脑上。当我尝试上传时，它将遍历form.parse和所有内容，但当它尝试写入文件时，它抛出以下错误：

/Users/USER/Documents/Node/requestHandlers.js:42
    fs.rename(files.upload.path, "/tmp/test.png", function (error) {
                          ^
TypeError: Cannot read property 'path' of undefined

我是Nodejs的新手，所以任何类型的帮助都会很好。我也尝试过执行file.write，但仍然抛出相同的错误。如有任何帮助，我们将非常感谢(：

使用代码更新：

var exec = require("child_process").exec;
var qs = require("querystring"),
fs = require("fs"),
formidable = require("formidable"),
url = require( "url" );

function start(response, request) {
/*
var fileName = "start.html"
var localPath = __dirname;
var mimeType = "text/html";
var name = localPath + "/" + fileName;
getFile(name, response, mimeType);
console.log("Request handler 'start' was called.");
console.log("Serving File: " + name);
*/
var body = '<html>'+
    '<head>'+
    '<meta http-equiv="Content-Type" '+
    'content="text/html; charset=UTF-8" />'+
    '</head>'+
    '<body>'+
    '<form action="/upload" enctype="multipart/form-data" '+
    'method="post">'+
    '<input type="file" name="upload" multiple="multiple">'+
    '<input type="submit" value="Upload file" />'+
    '</form>'+
    '</body>'+
    '</html>';

console.log( "Request for 'start' is called." );

response.writeHead( 200, { "Content-Type" : "text/html" } );
response.end( body );
}

function upload(response, request) {
console.log("Request handler 'upload' was called.");
console.log( "Preparing upload" );

var form = new formidable.IncomingForm();

form.parse(request, function(error, fields, files){
    if(error){
        console.log(error);
        console.log("Dun Goofed");
    }
    console.log("parsing done");
    fs.rename(files.upload.path, "/tmp/test.png", function (error) {
        if (error) {
            fs.unlink("/tmp/test.png");
            fs.rename(files.upload.path, "/tmp/test.png");
        }
    });
    /* fs.rename(files.upload.path, "/tmp/test.png", function(err){
        if(err){
            fs.unlink("/tmp/test.png");
            fs.rename(files.upload.path, "/tmp/test.png");
        }
    }); */
    response.writeHead(200, {"Content-Type": "text/plain"});
    response.write("Received image: <br/>");
    response.write("<img src='./show' />");
    response.end(); 
});
}


exports.start = start;
exports.upload = upload;
//exports.show = show;

我省略了一些部分，因为它们与文件上传无关，请原谅我的评论，只是旧代码。我也没有/show函数，因为我临时擦除了它。这里还有我在控制台中得到的错误。其中一个错误是因为上传取消了。在我输入我想要上传的文件后，浏览器只是在那里停留了一段时间，等待对服务器的请求，在控制台中，它只是停在form.parse之前，坐在那里大约一分钟什么也不做，然后它就会抛出所有的错误。

Web Server started on 127.0.0.1:8888
Request for / received.
About to route a request for /
Served a request for /
Request for 'start' is called.
Request for /upload received.
Received POST data chunk
About to route a request for /upload
Served a request for /upload
Request handler 'upload' was called.
Preparing upload

在此之前成功执行。然后浏览器等待一段时间，然后弹出没有接收到数据，或者网页不可用，然后在控制台中出现这些错误。

{}
[Error: Request aborted]
Dun Goofed
parsing done

/Users/USER/Documents/Node/requestHandlers.js:50
    fs.rename(files.upload.path, "/tmp/test.png", function (error) {
                          ^
TypeError: Cannot read property 'path' of undefined
at /Users/USER/Documents/Node/requestHandlers.js:50:31
at IncomingForm.<anonymous>    (/Users/USER/node_modules/formidable/lib/incoming_form.js:89:9)
at IncomingForm.EventEmitter.emit (events.js:95:17)
at IncomingForm._error (/Users/USER/node_modules/formidable/lib/incoming_form.js:272:8)
at IncomingMessage.<anonymous>     (/Users/USER/node_modules/formidable/lib/incoming_form.js:107:12)
at IncomingMessage.EventEmitter.emit (events.js:92:17)
at abortIncoming (http.js:1911:11)
at Socket.serverSocketCloseListener (http.js:1923:5)
at Socket.EventEmitter.emit (events.js:117:20)
at TCP.close (net.js:465:12)

node.js

file-upload

formidable

javascript

性能强劲，每月20元起的MySQL

功能完善，便宜稳定，没有业务可以自动停机，强效降本的MySQL

回答 1

Stack Overflow用户

发布于 2014-03-30 14:04:22

我也有同样的问题。

删除server.js中的代码request.setEncoding("utf8");

如下所示：

function start(route, handler) {
    http.createServer(function(request, response) {
        var postData = "";
        var pathname = url.parse(request.url).pathname;
        route(handler, pathname, response, request);

    }).listen(8889);
}