节点Js中的请求主体为空
在我的Node应用程序中，我试图查看request.body对象，以检查其中是否包含元素，但是console.log(req.body)将其清空。这是我的文件。
[下面的app.js文件
var express = require("express");
var app = express();
var mongoose = require("mongoose");
var nationalPark = require("./models/NationalParks");
//config
mongoose.connect('mongodb://localhost/National_Parks', {useNewUrlParser: true, useUnifiedTopology: true}).catch(function(reason){
console.log('Unable to connect to the mongodb instance. Error: ', reason);
});
app.set('view engine', 'ejs');
var bod = require("body-parser");
app.use(bod.urlencoded({extended:true}));
app.use(bod.json());
app.use(express.static(__dirname + '/resources'));
//Routes
app.get("/",function(req,res){
nationalPark.find({},function(err,nationalParks){
if(err){
console.log(err);
}else{
res.render("home",{nationalParks:nationalParks});
}
})
});
app.get("/home",function(req,res){
nationalPark.find({},function(err,nationalParks){
if(err){
console.log(err);
}else{
console.log(nationalParks);
res.render("home",{nationalParks:nationalParks});
}
})
});
app.get("/login",function(req,res){
res.render("login");
});
app.get("/signup",function(req,res){
res.render("signup");
});
app.get("/logout",function(req,res){
res.render("home");
});
app.get("/NationalPark",function(req,res){
console.log(park.park)
res.render("NationalPark",{park:park.park});
});
app.post("/NationalPark",function(req,res){
console.log(req.body);
res.render("NationalPark");
});
app.get("/post",function(req,res){
res.render("post");
});
app.get("/post-display",function(req,res){
res.render("post-display");
});
app.get("/profile",function(req,res){
res.render("profile");
});
//listening port
app.listen(3000,function(){
console.log("Server started");
});
这是我的home.ejs文件
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link href=";display=swap" rel="stylesheet">
<link rel="stylesheet" href=".0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="/css/national-parks.css">
</head>
<body>
<div class="container" id="headContainer">
<div class="row">
<div class="col-2">
<nav class="nav flex-column">
<a class="nav-link active text-white" href="/login">Login</a>
<a class="nav-link active text-white" href="/signup">Sign Up</a>
<a class="nav-link active text-white" href="/logout">Logout</a>
</nav>
</div>
<div class="col-10" id="heading">
<h1 class="display-3">National Parks Observer</h1>
<p class="lead">Site Dedicated to Indian National Parks</p>
</div>
</div>
</div>
<div class="container" id="postings">
<% var r=Math.round(nationalParks.length/3); %>
<% var x = 1; %>
<% var elementCount = 3; %>
<% var constant = 3; %>
<% var start=0; %>
<% while(x<=r){ %>
<div class="row">
<% for(var k=start;k<elementCount;k++){ %>
<div class="col-4">
<div class="card">
<form method="POST" action="/NationalPark">
<img class="card-img-top" src=<%=nationalParks[k].imageurl %> alt="Card image cap">
<h5 class="card-title" name="parktitle" id="title"><%=nationalParks[k].nationalPark %></h5>
<button type="submit" class="btn btn-primary btn-sm"">View Page</button>
</form>
</div>
</div>
<% } %>
<% start=start+constant; %>
<% elementCount=Math.min(elementCount+constant,nationalParks.length); %>
</div>
<% x++; } %>
</div>
<br>
<br>
<br>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src=".2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src=".js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src=".0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="/javascript/national-park.js"></script>
</body>
</html>
[app.js中的后续发布方法
app.post("/NationalPark",function(req,res){
console.log(req.body);
res.render("NationalPark");
});
[console.log(req.body)只需打印{}
为什么发生，我错过了什么吗？非常感谢您的帮助。提前致谢。
回答如下：您的表格，以下摘录中没有<input />元素。
<form method="POST" action="/NationalPark">
<img class="card-img-top" src=<%=nationalParks[k].imageurl %> alt="Card image cap">
<h5 class="card-title" name="parktitle" id="title"><%=nationalParks[k].nationalPark %></h5>
<button type="submit" class="btn btn-primary btn-sm"">View Page</button>
</form>
因此，没有数据被发布回应用程序。
添加输入元素示例
<Input type="hidden" name="park_name" value=<%=nationalParks[k].nationalPark %> />
以您的表格将使属性req.body.park_name在app.js中可用
节点Js中的请求主体为空
在我的Node应用程序中，我试图查看request.body对象，以检查其中是否包含元素，但是console.log(req.body)将其清空。这是我的文件。
[下面的app.js文件
var express = require("express");
var app = express();
var mongoose = require("mongoose");
var nationalPark = require("./models/NationalParks");
//config
mongoose.connect('mongodb://localhost/National_Parks', {useNewUrlParser: true, useUnifiedTopology: true}).catch(function(reason){
console.log('Unable to connect to the mongodb instance. Error: ', reason);
});
app.set('view engine', 'ejs');
var bod = require("body-parser");
app.use(bod.urlencoded({extended:true}));
app.use(bod.json());
app.use(express.static(__dirname + '/resources'));
//Routes
app.get("/",function(req,res){
nationalPark.find({},function(err,nationalParks){
if(err){
console.log(err);
}else{
res.render("home",{nationalParks:nationalParks});
}
})
});
app.get("/home",function(req,res){
nationalPark.find({},function(err,nationalParks){
if(err){
console.log(err);
}else{
console.log(nationalParks);
res.render("home",{nationalParks:nationalParks});
}
})
});
app.get("/login",function(req,res){
res.render("login");
});
app.get("/signup",function(req,res){
res.render("signup");
});
app.get("/logout",function(req,res){
res.render("home");
});
app.get("/NationalPark",function(req,res){
console.log(park.park)
res.render("NationalPark",{park:park.park});
});
app.post("/NationalPark",function(req,res){
console.log(req.body);
res.render("NationalPark");
});
app.get("/post",function(req,res){
res.render("post");
});
app.get("/post-display",function(req,res){
res.render("post-display");
});
app.get("/profile",function(req,res){
res.render("profile");
});
//listening port
app.listen(3000,function(){
console.log("Server started");
});
这是我的home.ejs文件
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link href=";display=swap" rel="stylesheet">
<link rel="stylesheet" href=".0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="/css/national-parks.css">
</head>
<body>
<div class="container" id="headContainer">
<div class="row">
<div class="col-2">
<nav class="nav flex-column">
<a class="nav-link active text-white" href="/login">Login</a>
<a class="nav-link active text-white" href="/signup">Sign Up</a>
<a class="nav-link active text-white" href="/logout">Logout</a>
</nav>
</div>
<div class="col-10" id="heading">
<h1 class="display-3">National Parks Observer</h1>
<p class="lead">Site Dedicated to Indian National Parks</p>
</div>
</div>
</div>
<div class="container" id="postings">
<% var r=Math.round(nationalParks.length/3); %>
<% var x = 1; %>
<% var elementCount = 3; %>
<% var constant = 3; %>
<% var start=0; %>
<% while(x<=r){ %>
<div class="row">
<% for(var k=start;k<elementCount;k++){ %>
<div class="col-4">
<div class="card">
<form method="POST" action="/NationalPark">
<img class="card-img-top" src=<%=nationalParks[k].imageurl %> alt="Card image cap">
<h5 class="card-title" name="parktitle" id="title"><%=nationalParks[k].nationalPark %></h5>
<button type="submit" class="btn btn-primary btn-sm"">View Page</button>
</form>
</div>
</div>
<% } %>
<% start=start+constant; %>
<% elementCount=Math.min(elementCount+constant,nationalParks.length); %>
</div>
<% x++; } %>
</div>
<br>
<br>
<br>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src=".2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src=".js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src=".0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="/javascript/national-park.js"></script>
</body>
</html>
[app.js中的后续发布方法
app.post("/NationalPark",function(req,res){
console.log(req.body);
res.render("NationalPark");
});
[console.log(req.body)只需打印{}
为什么发生，我错过了什么吗？非常感谢您的帮助。提前致谢。
回答如下：您的表格，以下摘录中没有<input />元素。
<form method="POST" action="/NationalPark">
<img class="card-img-top" src=<%=nationalParks[k].imageurl %> alt="Card image cap">
<h5 class="card-title" name="parktitle" id="title"><%=nationalParks[k].nationalPark %></h5>
<button type="submit" class="btn btn-primary btn-sm"">View Page</button>
</form>
因此，没有数据被发布回应用程序。
添加输入元素示例
<Input type="hidden" name="park_name" value=<%=nationalParks[k].nationalPark %> />
以您的表格将使属性req.body.park_name在app.js中可用