47412130
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("parse done");
fs.renameSync(files.upload.path, "/tmp/test.png");
response.writeHead(200, {"Content-type": "text/html"});
response.write("Received image:<br>");
response.write("<image src=/show />");
response.end();
});
}
上面是代码，下面是报错的信息。我其实就是在按照《nodeJs入门》那本书在做练习，不知道为啥代码敲完之后，它就报这个错。
fs.renameSync(files.upload.path, "/tmp/test.png");
^
TypeError: Cannot read property 'path' of undefined
at /Users/chenxiaochun/Documents/我的资料/test/nodeJs/requestHandlers.js:36:29
at IncomingForm.<anonymous> (/Users/chenxiaochun/Documents/我的资料/test/nodeJs/node_modules/formidable/lib/incoming_form.js:118:9)
at IncomingForm.emit (events.js:67:17)
at IncomingForm._error (/Users/chenxiaochun/Documents/我的资料/test/nodeJs/node_modules/formidable/lib/incoming_form.js:248:8)
at IncomingForm.write (/Users/chenxiaochun/Documents/我的资料/test/nodeJs/node_modules/formidable/lib/incoming_form.js:145:10)
at IncomingMessage.<anonymous> (/Users/chenxiaochun/Documents/我的资料/test/nodeJs/node_modules/formidable/lib/incoming_form.js:95:12)
at IncomingMessage.emit (events.js:67:17)
at HTTPParser.onBody (http.js:113:42)
at Socket.ondata (http.js:1410:22)
at TCP.onread (net.js:374:27)
我把完整的代码贴出来吧，分为以下几个部分。 index.js
var server = require("./server");
var router = require("./router");
var requestHandlers = require("./requestHandlers");
var handle = {};
handle["/"] = requestHandlers.start;
handle["/start"] = requestHandlers.start;
handle["/upload"] = requestHandlers.upload;
handle["/show"] = requestHandlers.show;
server.start(router.route, handle);
server.js
var http = require("http");
var url = require("url");
function start(route, handle){
function onRequest(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);
}
http.createServer(onRequest).listen(8888);
console.log("Server has started.");
}
exports.start = start;
route.js
function route(handle, pathname, response, request){
console.log("About route a request for " + pathname);
if(typeof handle[pathname] === "function"){
return handle[pathname](response, request);
}else{
console.log("No request handle for " + pathname +".");
response.writeHead("404", {"Content-type": "text/plain"});
response.write("404 not found.");
response.end();
}
}
exports.route = route;
requestHandler.js
var querystring = require("querystring");
var fs = require("fs");
var formidable = require("formidable");
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">'+
'<input type="submit" value="Upload file" />'+
'</form>'+
'</body>'+
'</html>';
response.writeHead(200, {"Content-type": "text/html"});
response.write(body);
response.end();
}
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("parse done");
console.log(files);
fs.renameSync(files.upload.path, "/tmp/test.png");
response.writeHead(200, {"Content-type": "text/html"});
response.write("Received image:<br>");
response.write("<image src='/show' />");
response.end();
});
}
function show(response, postData){
console.log("Request handler 'show' was called.");
fs.readFile("/tmp/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": "text/plain"});
response.write(file, "binary");
response.end();
}
});
}
exports.start = start;
exports.upload = upload;
exports.show = show;