这是 mong.js 文件，其中包含连接到 mongo 服务器执行 get、put、post 操作的代码
var express = require('express');
var app = express();
var mongoose = require('mongoose');
var bodyParser = require('body-parser');
app.use(bodyParser.json());
mongoose.connect("mongodb://localhost/test");
var todoschema = new mongoose.Schema ({
name : {type: String, required: true}
});
var todomodel = mongoose.model('todolist',todoschema);
app.get('/',function(req,res){
res.sendFile('C:\Users\Rohit\Desktop\New folder\todo.html');
})
app.get('/todolist', function (req, res){
todomodel.find(function(err,tasks){
res.json(tasks);
});
});
app.post('/todolist', function (req, res) {
todomodel.insert(req.body, function(err, task) {
res.json(task);
});
});
app.delete('/todolist/:id', function (req, res) {
todomodel.remove(req.params.id, function (err, task) {
res.json(task);
});
});
app.get('/todolist/:id', function (req, res) {
todomodel.findById(req.params.id, function (err, task) {
res.json(task);
});
});
app.put('/todolist/:id', function (req, res) {
todomodel.findAndModify({
query: req.params.id,
update: {$set: {name: req.body.name}},
new: true}, function (err, task) {
res.json(task);
}
);
});
app.listen(3000);
console.log("Server running on port 3000");这是todo.html文件，todo列表页面看起来像这样
<!DOCTYPE html>
<html ng-app="App">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.12/angular.min.js"></script>
<script src="frontend.js"></script>
<style>
#list
{ margin-left:320px;
font-size: 40px;
font-family:verdana;
}
button
{ color:yellow;background-color:red;text-align:center;cursor:pointer;
-webkit-transition-duration: 0.4s;
transition-duration: 0.4s;
font-size:40px;
padding: 14px 32px;
}
button:hover
{ background-color:peachpuff;
color:tomato;
}
</style>
</head>
<body style="background-color:cyan;">
<div ng-controller="Ctrl">
<h1 style="text-align:center;font-family:verdana;">To-Do LiSt</h1>
<div style="margin-left:300px">
<input type="text" ng-model="task.name" style="background-color:black;color:white;font-size:40px;width:40%">
<button ng-click="addtask()">Add</button>
<button ng-click="updatetask()">Update</button> <button ng-click="clearfield()">Clear</button>
</div>
<ul>
<li id="list" ng-repeat="task in todolist">
{{task.name}}
<button ng-click="deletetask(task._id)">Delete</button> <button ng-click="edittask(task._id)">Edit</button>
</tr>
</table>
</div>
</body>
</html>这是 frontend.js 文件，其中包含 Angular js 部分以及我的待办事项列表页面的工作函数
var App = angular.module('App',[]);
App.controller('Ctrl',['$scope','$http',function($scope,$http) {
var reset = function(){
$http.get('/todolist').success(function(response){
$scope.todolist=response;
$scope.task="";
});
};
reset();
$scope.addtask = function() {
$http.post('/todolist', $scope.task).success(function(response) {
reset();
});
};
$scope.deletetask = function() {
$http.delete('/todolist/'+ id).success(function(response){
reset();
});
};
$scope.edittask = function(id) {
$http.get('/todolist/'+ id).success(function(response){
$scope.task=response;
});
};
$scope.updatetask = function(id){
$http.put('/todolist/'+$scope.task._id, $scope.task).success(function(response){
reset();
});
};
$scope.clearfield = function(){
$scope.task="";
}
}]);TypeError: path must be absolute or specify root to res.sendFile
at ServerResponse.sendFile (C:\Users\Rohit\node_modules\express\lib\response.js:403:11)
at C:\Users\Rohit\Desktop\New folder\mong.js:17:9
at Layer.handle [as handle_request] (C:\Users\Rohit\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\Rohit\node_modules\express\lib\router\route.js:131:13)
at Route.dispatch (C:\Users\Rohit\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (C:\Users\Rohit\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\Rohit\node_modules\express\lib\router\index.js:277:22
at Function.process_params (C:\Users\Rohit\node_modules\express\lib\router\index.js:330:12)
at next (C:\Users\Rohit\node_modules\express\lib\router\index.js:271:10)
at jsonParser (C:\Users\Rohit\node_modules\body-parser\lib\types\json.js:100:40)
at Layer.handle [as handle_request] (C:\Users\Rohit\node_modules\express\lib\router\layer.js:95:5)
at trim_prefix (C:\Users\Rohit\node_modules\express\lib\router\index.js:312:13)
at C:\Users\Rohit\node_modules\express\lib\router\index.js:280:7
at Function.process_params (C:\Users\Rohit\node_modules\express\lib\router\index.js:330:12)
at next (C:\Users\Rohit\node_modules\express\lib\router\index.js:271:10)
at expressInit (C:\Users\Rohit\node_modules\express\lib\middleware\init.js:33:5) 我试图在打开 http://localhost:3000 时显示我的 html 文件，但我不能，你能指导我如何做吗，我对这一切都很陌生，一个更简单的解决方案会更有帮助，以便我能够理解它。
最佳答案
用途:
res.sendFile('./todo.html');
或者
var path = require('path');
res.sendFile(path.join(__dirname + '/todo.html'));
第二个更好。
但是您的 frontend.js 文件再次无法加载。因此，最好的方法是创建一个公共(public)文件夹并使用express.static中间件提供静态文件。
app.use(require('express').static('./public'));
更详细的解释可以引用:https://stackoverflow.com/a/36041093/2680461
关于javascript - 当我尝试通过连接到//localhost :3000, 来显示 html 页面时，显示错误，错误已作为片段上传，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37539506/