最后的代码有些小问题，需要修改requestHandlers.js中的upload和show方法，修改后如下：function upload(response, request) { console.log("Request handler 'upload' was called.");
var form = new formidable.IncomingForm();
form.uploadDir='tmp';
console.log("about to parse");
form.parse(request, function(error, fields, files) {
console.log("parsing done");
fs.renameSync(files.upload.path, "./tmp/Pomelo.jpg");
response.writeHead(200, {"Content-Type": "text/html"});
response.write("received image:
");
response.write("");
response.end();
});
}
function show(response) { console.log("Request handler 'show' was called."); fs.readFile("./tmp/Pomelo.jpg", "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/jpg"}); response.write(file, "binary"); response.end(); } }); } 不然会抱错