添加所以我的下一个问题是,当我尝试添加一个新的依赖项时(npm install --保存socket.io)。JSON文件也是有效的。我得到这个错误:无法解析json
npm ERR! Unexpected string
npm ERR! File: /Users/John/package.json
npm ERR! Failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR!
npm ERR! This is not a bug in npm.
npm ERR! Tell the package author to fix their package.json file. JSON.parse
所以我一直在尝试找出为什么这个错误会返回。所有的文件(HTML、JSON、JS)都在我桌面上的同一个文件夹中。我使用的是node.js和socket.io
这是我的JS文件:
var app = require('express')();
var http = require('http').Server(app);
app.get('/', function(req, res){
res.sendFile('index.html');
});
http.listen(3000,function(){
console.log('listening on : 3000');
});
下面是要返回的内容:
MacBook-Pro:~ John$ node /Users/John/Desktop/Chatapp/index.js
listening on : 3000
TypeError: path must be absolute or specify root to res.sendFile
at ServerResponse.sendFile (/Users/John/node_modules/express/lib/response.js:389:11)
at /Users/John/Desktop/Chatapp/index.js:5:7
at Layer.handle [as handle_request] (/Users/John/node_modules/express/lib/router/layer.js:76:5)
at next (/Users/John/node_modules/express/lib/router/route.js:100:13)
at Route.dispatch (/Users/John/node_modules/express/lib/router/route.js:81:3)
at Layer.handle [as handle_request] (/Users/John/node_modules/express/lib/router/layer.js:76:5)
at /Users/John/node_modules/express/lib/router/index.js:234:24
at Function.proto.process_params (/Users/John/node_modules/express/lib/router/index.js:312:12)
at /Users/John/node_modules/express/lib/router/index.js:228:12
at Function.match_layer (/Users/John/node_modules/express/lib/router/index.js:295:3)
TypeError: path must be absolute or specify root to res.sendFile
at ServerResponse.sendFile (/Users/John/node_modules/express/lib/response.js:389:11)
at /Users/John/Desktop/Chatapp/index.js:5:7
at Layer.handle [as handle_request] (/Users/John/node_modules/express/lib/router/layer.js:76:5)
at next (/Users/John/node_modules/express/lib/router/route.js:100:13)
at Route.dispatch (/Users/John/node_modules/express/lib/router/route.js:81:3)
at Layer.handle [as handle_request] (/Users/John/node_modules/express/lib/router/layer.js:76:5)
at /Users/John/node_modules/express/lib/router/index.js:234:24
at Function.proto.process_params (/Users/John/node_modules/express/lib/router/index.js:312:12)
at /Users/John/node_modules/express/lib/router/index.js:228:12
at Function.match_layer (/Users/John/node_modules/express/lib/router/index.js:295:3)
发布于 2014-09-28 06:06:19
错误非常明显,您需要在res.sendFile()
的配置对象中指定绝对(而不是相对)路径和/或设置root
。示例:
// assuming index.html is in the same directory as this script
res.sendFile(__dirname + '/index.html');
或者指定根目录(用作res.sendFile()
的第一个参数的基本路径
res.sendFile('index.html', { root: __dirname });
当您传递用户生成的文件路径时,指定root
路径更有用,因为该路径可能包含格式错误/恶意的部分,如..
(例如../../../../../../etc/passwd
)。设置root
路径可防止此类恶意路径被用于访问该基本路径之外的文件。
发布于 2017-11-14 09:14:20
在.mjs文件中,我们暂时没有__dirname
因此
res.sendFile('index.html', { root: '.' })
发布于 2014-09-28 06:05:47
尝试添加根路径。
app.get('/', function(req, res) {
res.sendFile('index.html', { root: __dirname });
});
https://stackoverflow.com/questions/26079611
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