采用HTML格式并将值传递给node.js函数中的变量

Question

Problem Statement: I have a simple HTML form that asks for three numbers from the user. 问题陈述：我有一个简单的HTML表单，要求用户提供三个数字。 When they hit submit, I would the form to be passed to a node.js file and assign each value to a variable. 当他们点击提交时，我会将表单传递到node.js文件，并将每个值分配给一个变量。

Below is my HTML file: 以下是我的HTML文件：

<body>
<form action="/" method="post">
<fieldset>
First number: <input type="number" name="param1"><br>
Second number: <input type="number" name="param2"><br>
Third number: <input type="number" name="param3"><br>
<input type="submit" value="submit" />
</fieldset>
</form>
</body>

And here is the little bit I have for the node.js file: 这是我对node.js文件的一点了解：

var http = require('http');
var math = require('mathjs');

    var m = 3;
    var n = 5;
    var o = 7;
    var p = 2;

http.createServer(function(req,res) {

function pleaseSolve () {

    var comp = math.chain(m)
    .add(m)
    .divide(p)
    .multiply(o)
    .done();

res.writeHead(200, {'Content-Type': 'text/html'});
res.end("The answer is " + comp);

}

pleaseSolve();

}).listen(8080);

Instead, I would like a method or something similar that would assign those variables using input from the HTML form rather than me simply hard-coding them. 相反，我想要一种方法或类似的方法，可以使用HTML表单的输入来分配这些变量，而不是简单地对其进行硬编码。

EDIT: I've already been downvoted and I have been searching the web for two days for an answer for this and I haven't found one. 编辑：我已经被否决了，我已经在网上搜索了两天以寻求答案，但是我还没有找到答案。 Please be constructive and at least link another post versus downvoting and being non-constructive. 请保持建设性，并至少将另一个帖子与否决和非建设性联系起来。

Answer 1

This following Node.js code will solve your question. 以下以下Node.js代码将解决您的问题。 You need a route to return your main html file and a route that gets post data and returns a result based on this data. 您需要一条路由来返回您的主要html文件，以及一条路由来获取发布数据并基于此数据返回结果。

var express = require('express')
var http = require('http');
var math = require('mathjs');
var bodyParser = require('body-parser');

var app = express()

// use body parser to easy fetch post body
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json())

// route to '/' to return the html file
app.get('/', function (req, res, next) {
  res.sendfile('index.html');
});

//route that receives the post body and returns your computation
app.post('/solve', function (req, res, next) {
  pleaseSolve(req.body, res);
});

app.listen(8080);

function pleaseSolve(parms, res) {
  //get the parameters based on input name attribute from the html
  //and parse strings to numbers
  var m = +parms.param1;
  var o = +parms.param2;
  var p = +parms.param3;

  var comp = math.chain(m)
    .add(m)
    .divide(p)
    .multiply(o)
    .done();

  res.writeHead(200, { 'Content-Type': 'text/html' });
  res.end("The answer is " + comp);
}

采用HTML格式并将值传递给node.js函数中的变量

问题描述

1 个解决方案

解决方案1
2 已采纳 2017-08-09 23:52:19

采用HTML格式并将值传递给node.js函数中的变量

问题描述

1 个解决方案

解决方案1 2 已采纳 2017-08-09 23:52:19

解决方案1
2 已采纳 2017-08-09 23:52:19