无法使用NodeJS / ExpressJS和Postman获取POST数据 [英] Can't get POST data using NodeJS/ExpressJS and Postman

问题描述

这是我服务器的代码：

  var express = require（'express'）; 
 var bodyParser = require（ body-parser）; 
 var app = express（）; 
 app.use（bodyParser.json（））; 
 
 app.post（ /，function（req，res）{
 res.send（req.body）; 
}）; 
 
 app.listen（3000，function（）{
 console.log（’示例应用程序在端口3000上监听！’）; 
}）; 
  

从邮递员，我向

解决方案

添加请求的编码。这是一个示例

  .. 
 app.use（bodyParser.json（））; 
 app.use（bodyParser.urlencoded（{Extended：true}））; 
 .. 
  

然后选择 x-www-form-urlencoded 或将Content-Type设置为 application / json 并选择 raw

编辑以使用原始

原始

  {
 foo： bar 
} 
  

标题

 内容-类型：application / json 
  

EDIT＃2 回答聊天中的问题：

1. 为什么它不能使用表单数据？

您当然可以，只需查看此答案如何处理Express 4中的FormData

2. 使用 x-www-form-urlencoded 和 raw
$ b $有什么区别b

application / json和application / x-www-form-urlencoded

中的差异

This is the code of my server :

var express = require('express');
var bodyParser = require("body-parser");
var app = express();
app.use(bodyParser.json());

app.post("/", function(req, res) {
    res.send(req.body);
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});

From Postman, I launch a POST request to http://localhost:3000/ and in Body/form-data I have a key "foo" and value "bar".

However I keep getting an empty object in the response. The req.body property is always empty.

Did I miss something?

解决方案

Add the encoding of the request. Here is an example

..
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
..

Then select x-www-form-urlencoded in Postman or set Content-Type to application/json and select raw

Edit for use of raw

Raw

{
  "foo": "bar"
}

Headers

Content-Type: application/json

EDIT #2 Answering questions from chat:

1. why it can't work with form-data?

You sure can, just look at this answer How to handle FormData from express 4

2. What is the difference between using x-www-form-urlencoded and raw

differences in application/json and application/x-www-form-urlencoded

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