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javascript - NodeJs/Formidable,上传图片错误

转载 作者:行者123 更新时间:2023-11-30 05:37:35 25 4
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我正在尝试使用 NodeJs 和 Formidable 制作图像/文件上传表单。我没有使用 express 。简直太厉害了但无论如何,我用 formidable 尝试了最常见的脚本,但没有一个有效。我的代码基本上与本教程中的代码完全相同:http://justinkjchang.wordpress.com/2013/11/08/image-uploader-using-node-js/周围有很多这样的教程,我在一些书籍或视频中看到了几乎完全相同的东西,它们似乎都有效,除了我的。我已经安装了 formidable,并且我拥有最新版本的 node.js 和 Node.js。我也是mac。当我尝试上传时,它将通过 form.parse 和所有内容,但是当它尝试写入文件时,它会抛出此错误:

/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,所以任何形式的帮助都会很好。我也试过做 file.write,但它仍然抛出同样的错误。任何帮助将不胜感激(:

更新代码:

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;

我省略了一些与文件上传无关的部分,请原谅评论,只是旧代码。我也没有/show 功能,因为我暂时删除了它。此外,这是我在控制台中遇到的错误。其中一个错误是因为上传取消。输入要上传的文件后,浏览器会在那里等待一段时间,等待服务器请求,而在控制台中,它会在 form.parse 之前停止,并在那里等待大约一分钟,然后它会推出所有错误。

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

成功执行到这里。然后浏览器等了一会,要么弹出没有收到数据,要么网页不可用,然后控制台就出现这些错误。

{}
[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)

最佳答案

我也有同样的问题。

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

像这样:

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);
}

关于javascript - NodeJs/Formidable,上传图片错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22733110/

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