与我以前没有遇到过的nodejs服务器有一些奇怪的错误。我得到的错误: “TypeError:无法读取未定义的属性”长度“ 我使用强大的处理来自我的html页面的任何formdata。尝试了很多事情来修复它,并在网上找到有类似问题但没有任何结果的人。这是我的代码:遇到“无法读取属性”长度未定义“
var http = require('http');
var fs = require('fs');
var formidable = require("formidable");
var util = require('util');
var exec = require('child_process').exec;
var ram;
var disk;
var cpu;
var port = 80;
var ip = "172.19.0.1";
//als de user request doet naar form forward dan naar displayForom, else naar processallfieldsoftheForm om
//invoer van de gebruiker te verwerken
var server = http.createServer(function (req, res) {
if (req.method.toLowerCase() == 'get') {
displayForm(res);
} else if (req.method.toLowerCase() == 'post') {
processAllFieldsOfTheForm(req, res);
}
});
//geef de html form weer
function displayForm(res) {
fs.readFile('form.html', function (err, data) {
res.writeHead(200, {
'Content-Type': 'text/html',
'content-length' : data.length
//error is here
});
res.write(data);
res.end();
});
}
//functie om invoer van de gebruiker te verwerken serverside en als variabele op te slaan.
function processAllFieldsOfTheForm(req, res) {
var form = new formidable.IncomingForm();
form.parse(req, function (err, fields, files)
{
ram = (fields.mem)
disk = (fields.dsk)
cpu = (fields.cpu);
}
);
}
//exec('cat /home/js/text123', function(err, stdout, stderr){
//console.log(stdout);
//});
//serverside logs om te illistreren waar de server naar luistert, en waar hij luistert
server.listen(port, ip);
console.log("server lisening on " + port + " adress: " + ip);
检查'err'的内容 – Andreas