node.js TypeError:路径必须是绝对路径或指定根路径到res.sendFile[解析JSON失败]

(添加) 所以我的下一个问题是，当我尝试添加一个新的依赖(npm install——save socket.io)。JSON文件也是有效的。我得到这个错误: 解析json失败

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

我一直在试图弄清楚为什么这个错误一直返回。所有的文件(HTML,JSON,JS)都在我桌面上的同一个文件夹里。我使用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');
});

这是返回的内容:

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)

当前回答

如果您正在使用根目录，那么您可以使用这种方法

res.sendFile(__dirname + '/FOLDER_IN_ROOT_DIRECTORY/index.html');

但如果你使用的是在/Routes/someRoute.js文件夹中的Routes，那么你就需要这样做

const path = require("path");
...
route.get("/some_route", (req, res) => {
   res.sendFile(path.resolve('FOLDER_IN_ROOT_DIRECTORY/index.html')
});

2019-03-17 11:44:10

其他回答

它将在localhost:8080调用上重定向到index.html。

app.get('/',function(req,res){
    res.sendFile('index.html', { root: __dirname });
});

2019-06-11 09:28:29

我使用下面的代码并尝试显示sitemap.xml文件

router.get('/sitemap.xml', function (req, res) {
    res.sendFile('sitemap.xml', { root: '.' });
});

2020-06-26 11:48:37

你可以考虑在你的目录上使用双斜杠

app。把‘-’,(req, res) = > { res.sendFile('C:\\用户\\Desktop\\Fitness Finder' + '/index.html') })

2018-07-04 11:48:17

我这样做了，现在我的应用程序正常工作了，

res.sendFile('your drive://your_subfolders//file.html');

2020-04-22 19:02:28

在app.js中的配置对我来说很好:

    //production mode
if (process.env.NODE_ENV === "production") {
  app.use(express.static(path.join(__dirname, "client/build")));
  app.get("*", (req, res) => {
    res.sendFile(path.join((__dirname + "/client/build/index.html")));

  });
}

//build mode
app.get("*", (req, res) => {
  res.sendFile(path.join(__dirname + "/client/public/index.html"));

});

2020-12-09 12:49:33

node.js TypeError:路径必须是绝对路径或指定根路径到res.sendFile[解析JSON失败]

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