Node.js(带有 express 和 bodyParser):无法从 post 请求中获取表单数据 [英] Node.js (with express & bodyParser): unable to obtain form-data from post request
问题描述
我似乎无法恢复发送到我的 Node.js 服务器的 post 请求的表单数据.我已经把服务器代码和发布请求(在 chrome 中使用邮递员发送)放在下面:
I can't seem to recover the form-data of a post request sent to my Node.js server. I've put below the server code and the post request (sent using postman in chrome):
发布请求
POST /api/login HTTP/1.1
Host: localhost:8080
Cache-Control: no-cache
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="userName"
jem
----WebKitFormBoundaryE19zNvXGzXaLvS5C
NodeJS 服务器代码
var express = require('express'); // call express
var app = express(); // define our app using express
var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(bodyParser());
app.all('/*', function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Headers', 'Content-Type,accept,access_token,X-Requested-With');
next();
});
var port = process.env.PORT || 8080; // set our port
var router = express.Router(); // get an instance of the express Router
router.get('/', function(req, res) {
res.json({ message: 'I am groot!' });
});
// Login
router.route('/login')
.post(function(req, res){
console.log('Auth request recieved');
// Get the user name
var user = req.body.userName;
var aToken = getToken(user);
res.json({
'token':'a_token'
});
});
app.use('/api', router);
app.listen(port);
登录方法尝试获取req.body.userName
,但是,req.body
始终为空.我在 SO 上看到其他案例描述了这种行为,但没有一个相关的答案在这里适用.
The login method tries to obtain the req.body.userName
, however, req.body
is always empty.
I've seen other cases on SO describing such behavior but none of the related answers did apply here.
感谢您的帮助.
推荐答案
一般来说,一个 express 应用需要指定合适的body-解析器中间件,以便 req.body
包含正文.
In general, an express app needs to specify the appropriate body-parser middleware in order for req.body
to contain the body.
如果您需要解析 url 编码(非多部分)表单数据以及 JSON,请尝试添加:
If you required parsing of url-encoded (non-multipart) form data, as well as JSON, try adding:
// Put this statement near the top of your module
var bodyParser = require('body-parser');
// Put these statements before you define any routes.
app.use(bodyParser.urlencoded());
app.use(bodyParser.json());
首先,您需要将 body-parser 添加到 dependencies
package.json
的属性,然后执行 npm update
.
First, you'll need to add body-parser to the dependencies
property of your package.json
, and then perform a npm update
.
要处理多部分表单数据,bodyParser.urlencoded()
正文解析器将不起作用.请参阅此处推荐的模块以解析多部分主体.
To handle multi-part form data, the bodyParser.urlencoded()
body parser will not work. See the suggested modules here for parsing multipart bodies.
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