如何在Node.js中从客户端调用服务器端功能(例如html button onclick)？

Question

我需要在Node.js中从(客户端)html按钮onclick事件调用服务器端函数的完整基本示例,就像在ASP.NET和C#中一样.

我是Node.js的新手并使用Express框架.

有帮助吗？

改进的问题:

//服务器端 :

var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
var app = express();

// all environments

app.set('views',__dirname + '/views');
app.set('port', process.env.PORT || 3000);
app.engine('html', require('ejs').renderFile);
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.static(path.join(__dirname, 'public')));
app.set('view engine', 'html');

app.use(app.router);

app.get("/",function(req,res)
{
  res.render('home.html');
});


// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

app.get('/', routes.index);
app.get('/users', user.list);

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

//客户端

 <input type="button" onclick="" />  <--just want to call the serverside function from here-->

Answer 1

这是使用Express和HTML表单的示例.

var express = require('express');
var app = express();
var http = require('http');
var server = http.createServer(app);

app.use(express.bodyParser());
app.post('/', function(req, res) {
  console.log(req.body);
  res.send(200);
});

server.listen(process.env.PORT, process.env.IP);

上面的代码将启动Express的实例,它是Node的Web应用程序框架.该bodyParser()模块用于解析请求正文,因此您可以读取发布数据.然后它将侦听POST路线上的请求/.

<form method="post" action="/">
  <input type="test" name="field1">
  <input type="test" name="field2">
  <input type="submit">
</form>

如果你提交的形式,req.body为路线/,你会得到的结果:

{ field1: 'form contents', field2: 'second field contents' }

要运行一个函数,只需将它放在POST处理程序中,如下所示:

var foo = function() {
  // do something
};

app.post('/', function(req, res) {
  console.log(req.body);
  res.send(200);

  // sending a response does not pause the function
  foo();
});

如果您不想使用Express,则可以使用本机HTTP模块,但您必须自己解析HTTP请求正文.

var http = require('http');
http.createServer(function(request, response) {
  if (request.method === 'POST') {
    var data = '';

    request.on('data', function(chunk) {
      data += chunk;
    });

    request.on('end', function() {
      // parse the data
      foo();
    });
  }
}).listen(80);