fs.renameSync(files.upload.path, "C:/sap/java/nodejs/examples/testUpload/test.png" ^ TypeError: Cannot read property 'path' of undefined at c:\sap\java\nodejs\examples\hello\requestHandlers.js:30:30 at IncomingForm.<anonymous> (c:\sap\java\nodejs\examples\hello\node_modules\ formidable\lib\incoming_form.js:89:9) at IncomingForm.EventEmitter.emit (events.js:95:17) at IncomingForm._error (c:\sap\java\nodejs\examples\hello\node_modules\formi dable\lib\incoming_form.js:272:8) at IncomingMessage.<anonymous> (c:\sap\java\nodejs\examples\hello\node_modul es\formidable\lib\incoming_form.js:119:14) at IncomingMessage.EventEmitter.emit (events.js:92:17) at _stream_readable.js:920:16 at process._tickCallback (node.js:415:13)
我的代码如下 server.js
var http = require("http");
var url = require("url");
//var formidable = require("formidable");
function start(route,handle) {
http.createServer(function(request, response){
var postData="";
var pathName = url.parse(request.url).pathname;
console.log("Request for " + pathName + " received"); request.setEncoding("utf8");
route(handle, pathName, response, request);
}).listen(8081);
console.log("Server has started");
}
exports.start = start; requestHandlers.js:
var queryString = require("querystring");
var formidable = require("formidable");
var fs = require("fs");
function start(response, request) {
console.log("Request handler 'start' is called");
var content = '<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"/>' +
'<input type="submit" value="Upload file" />' +
'</form>' +
'</body>' +
'</html>';
response.writeHead(200,{"Content-Type": "Text/html"});
response.write(content);
response.end();
}
function upload(response, request) {
console.log("Request handler 'upload' is called");
var form = new formidable.IncomingForm();
console.log("About to parse");
form.parse(request, function(error, fields, files) {
console.log("parse done");
//try{
fs.renameSync(files.upload.path, "C:/sap/java/nodejs/examples/testUpload/test.png");
/*}catch(e){
console.log(e);
}*/
response.writeHead(200, {"Content-Type": "text/html"});
response.write("received image:<br/>");
response.write("<image src='/show' />");
response.end();
});
}
function show(response, request) {
console.log("Requset handler 'show' is called");
fs.readFile("C:/sap/java/nodejs/examples/testUpload/test.png", "binary", function(error, file) {
if(error) {
response.writeHead(500, {"Content-Type": "text/plain"});
response.write(error + "\n");
response.end();
}else{
response.writeHead(200, {"Content-Type": "image/png"});
response.write(file, "binary");
response.end();
}
});
}
exports.start = start;
exports.upload = upload;
exports.show = show; route.js:
function route(handle, pathName, response, request) {
console.log("About to route a request for " + pathName);
if(typeof(handle[pathName])==='function'){
return handle[pathName](response, request);
}else{
console.log("No request handler found for " + pathName);
response.writeHead(404,{"Content-Type": "Text/Plain"});
response.write("404 Not Found");
response.end();
}
}
exports.route = route;
index.js:
var server = require("./server.js");
var route = require("./router.js");
var requestHandlers = require("./requestHandlers.js");
另外,值得注意的两点,在requestHandlers.js中,
1.由于我的开发环境是:win7 64, 在fs.parse 和 fs.readFile的路径参数中,我都是直接给出的是绝对路径。
相对路径没有试过。
2.对应路径下的文件夹必须要存在(fs.renameSync 和 fs.readFile不会自动创建文件夹),否则还是会报错如下: fs.js:543 return binding.rename(pathModule._makeLong(oldPath), ^ Error: ENOENT, no such file or directory 'X:\...\ddcdf999d6b56cb30716f43e528e7eeb' at Object.fs.renameSync (fs.js:543:18) at c:\sap\java\nodejs\examples\hello\requestHandlers.js:30:7 at IncomingForm.<anonymous> (c:\sap\java\nodejs\examples\hello\node_modules\ formidable\lib\incoming_form.js:92:9) at IncomingForm.EventEmitter.emit (events.js:92:17) at IncomingForm._maybeEnd (c:\sap\java\nodejs\examples\hello\node_modules\fo rmidable\lib\incoming_form.js:533:8) at c:\sap\java\nodejs\examples\hello\node_modules\formidable\lib\incoming_fo rm.js:211:12 at WriteStream.<anonymous> (c:\sap\java\nodejs\examples\hello\node_modules\f ormidable\lib\file.js:70:5) at WriteStream.g (events.js:175:14) at WriteStream.EventEmitter.emit (events.js:117:20) at finishMaybe (_stream_writable.js:354:12)