javascript Node.js __dirname 未定义
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Node.js __dirname not defined
提问by ManishS
My directory look like this:
我的目录是这样的：
/config.json , /server.js , /staticFiles/welcome.html
/config.json , /server.js , /staticFiles/welcome.html
Running server.js gives error:
运行 server.js 给出错误：
app.use(express.static(_dirname + "/staticFiles")); ^ ReferenceError: _dirname is not defined
app.use(express.static(_dirname + "/staticFiles")); ^ 参考错误：_dirname 未定义
My Server.js:
我的 Server.js：
//------------Server-------------
var fs = require("fs");
var config = JSON.parse(fs.readFileSync("./config.json"));
console.log("Server UP and running..");
var host = config.host;
var port = config.port;
var express = require("express");
var app = express.createServer();
//---------Application----------------
app.use(app.router);
app.use(express.static(_dirname + "/staticFiles"));
app.get("/", function(request,response){
response.send("<h1>"/" of TrimServer</h1>");
});
app.listen(port,host);
console.log("Listening on Port -->",port);
//--------------End-------------------
回答by Didatus
You are using one underscore while this variable actually has two underscores at the beginning: http://nodejs.org/docs/latest/api/globals.html#globals_dirname
您使用的是一个下划线，而此变量实际上在开头有两个下划线：http: //nodejs.org/docs/latest/api/globals.html#globals_dirname
So use
所以用
app.use(express.static(__dirname + "/staticFiles"));
instead of
代替
app.use(express.static(_dirname + "/staticFiles"));
回答by Saket Sinha
use __dirname instead of _dirname (Missing one underscore in your code)
使用 __dirname 而不是 _dirname （代码中缺少一个下划线）
回答by Chandra Pant
Use __dirnameinstead of _dirname(You are missing one underscore in your code).
使用__dirname而不是_dirname（您的代码中缺少一个下划线）。
