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node.js + expressでPOSTを受け取る & POSTパラメータをJSONで取得する

Last updated at Posted at 2016-08-28

バージョン

  • node.js: v6.2.2
  • express: 4.14.0
  • body-parser: 1.15.2

expressでPOSTを受け取る

app.js側を用意する

app.js
const express = require('express');

const app = express();

app.listen(3000);
console.log('Server is online.');

app.post('/', function(req, res) {
    res.send('POST is sended.');
})

curlでたたく

$ curl -X POST http://localhost:3000

POSTパラメータをJSONで取得する

app.js側を用意する

POSTパラメータをJSONで取得するにはbody-parserを使う。

app.js
const express = require('express');
const bodyParser = require('body-parser');

const app = express();

// urlencodedとjsonは別々に初期化する
app.use(bodyParser.urlencoded({
	extended: true
}));
app.use(bodyParser.json());

app.listen(3000);
console.log('Server is online.');

app.post('/', function(req, res) {
	// リクエストボディを出力
	console.log(req.body);
	// パラメータ名、nameを出力
	console.log(req.body.name);

	res.send('POST request to the homepage');
})

curlで叩く

HTTPHeaderでapplication/jsonを受け付けるように記述。
-dオプションでパラメータを追加。

$ curl -X POST http://localhost:3000 -H "Accept: application/json" -H "Content-type: application/json" -d '{ "name" : "tanaka" }'

出力結果

Server is online.
{ name: 'tanaka' }
tanaka

参考

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