Question

我希望能够看到{＆＃34;内容＆＃34;：＆＃34;测试数据＆＃34;}（它应该作为POST请求的主体从客户端发送）我的服务器控制台，而不是我得到：

Listening to 8080...
I'm in myServer.use
POST request received
req.params: {}
req.body: undefined
req.query: {}

这是我的客户，它只是一个启动他的onclick功能的按钮：

<!DOCTYPE html>
<html>
    <head>
        <title>REST WebClient</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <p>This web is a REST client.</p>

    <script type="text/javascript">
    function POSTpressed(){
                //Making the request
                var xmlHttp = new XMLHttpRequest();
                xmlHttp.open( "POST", 'http://127.0.0.1:8080/v0/prueba/', true ); // false for synchronous request
                xmlHttp.send( {"content":"test data"} );
    }
    </script>

        <input type="button" onclick="POSTpressed();" id="POSTbutton" value="POST"/>

     </body>
</html>

这是服务器。如果有人试图重现它，则需要安装＆＃34; express＆＃34;库。

var express = require('express');
var myServer = express();

//stuff for server to going on
myServer.use(function(req, res, next){
    console.log("I'm in myServer.use");
    res.set('Content-Type', 'application/json');
    res.setHeader('Access-Control-Allow-Origin', '*'); //general access
    next();
});

//function which handles POST requests
myServer.post('/v0/prueba/', function(req, res){
    console.log('POST request received');
    //trying to see the sent body
    console.log("req.params: "+JSON.stringify(req.params));
    console.log("req.body: "+ req.body); //req.body.content would throw error: no content in undefined
    console.log("req.query: "+ JSON.stringify(req.query));

    res.send(null);

});//myServer.post

myServer.listen(8080);
console.log('Listening to 8080...');

Answer 1

在服务器端，您需要添加正文解析器中间件来解析正文：

var bodyParser = require('body-parser')

  :

// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }))

// parse application/json
app.use(bodyParser.json())

Answer 2

var bodyParser = require('body-parser'); 
myServer.use(bodyParser.json());
myServer.use(bodyParser.urlencoded({ extended: true }));

你需要使用身体解析器来获取身体。

Answer 3

您需要使用body-parser来获取客户端发送的数据见Body-parser

Javascript客户端在POST请求中发送正文，但node.js服务器将其取消为空

3 个答案: