强大的上传无法正常工作:' files& quot;未定义，无错误 [英] Formidable Upload Not Working: 'files" undefined, no error
问题描述
我正在按照 Node入门手册中的指南，尝试使用强大的功能上传文件.遵循此代码，我有一个服务器模块，该服务器模块将 request 对象传递给requestHandler模块.主页加载具有以下处理程序的表单:
I'm trying to upload a file using formidable, following the tutorial in the Node Beginner Book. Following this code, I have a server modules that passes the request object to a requestHandler module. The main page loads a form with the following handler:
function start(response) {
console.log("Request handler 'start' was called.");
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>';
response.writeHead(200, {"Content-Type": "text/html"});
response.write(body);
response.end();
}
提交表单后，/upload路径会触发以下上传处理函数:
When the form is submitted, the /upload path triggers the following upload handler function:
function upload(response,request) {
console.log("Request handler 'upload' was called.");
var form = new formidable.IncomingForm();
console.log("about to parse");
form.parse(request, function(error, fields, files) {
console.log("parsing done");
console.log(util.inspect({error: error, fields: fields, files: files}));
fs.rename(files.upload.path, "/tmp/test.png", function(error) {
if (error) {
console.log(error);
fs.unlink("/tmp/test.png");
fs.rename(files.upload.path, "/tmp/test.png");
}
});
response.writeHead(200, {"Content-Type": "text/html"});
response.write("received image:<br/>");
response.write("<img src='/show' />");
reponse.end();
});
}
但是，当单击上传"按钮时，服务器崩溃，并显示以下错误:
When the upload button is clicked, however, the server crashes with the following error:
/home/****/Coding/nodebeginner/requestHandlers.js:38
fs.rename(files.upload.path, "/tmp/test.png", function(erro
^
TypeError: Cannot read property 'path' of undefined
at /home/****/Coding/nodebeginner/requestHandlers.js:38:25
at IncomingForm.<anonymous> (/home/****/Coding/nodebeginner/node_modules/formidable/lib/incoming_form.js:104:9)
at IncomingForm.EventEmitter.emit (events.js:92:17)
at IncomingForm._maybeEnd (/home/****/Coding/nodebeginner/node_modules/formidable/lib/incoming_form.js:551:8)
at Object.end (/home/****/Coding/nodebeginner/node_modules/formidable/lib/incoming_form.js:238:12)
at IncomingMessage.<anonymous> (/home/****/Coding/nodebeginner/node_modules/formidable/lib/incoming_form.js:129:30)
at IncomingMessage.EventEmitter.emit (events.js:92:17)
at _stream_readable.js:920:16
at process._tickCallback (node.js:415:13)
因此，显然 files 变量是未定义的.我以为可能有错误，但是没有将 error 变量设置为 null .所以我在这里有些困惑.想法?
So evidently the files variable is undefined. I thought there might be an error, but no the error variable is set to null. So I'm a bit stumped here. Ideas?
推荐答案
我遇到了同样的问题.我想您会在本书结尾处的Node Beginner Book上看到这些行代码.我通过删除server.js文件上的跟踪代码来修复它:
I had same problem. I think you see those line code on Node Beginner Book, at the end of the book. I fixed it by removed follow code on server.js file:
// req.setEncoding("utf8");
// req.addListener("data", function(postDataChunk) {
// postData += postDataChunk;
// });
// req.addListener("end", function() {
// route(handle, pathname, res, req);
// });
Just do:
route(句柄，路径名，res，req);
route(handle, pathname, res, req);
And last, you must be careful at html form tags.
Sorry for my English and best wishes!
***VinRover Nguyen***
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