nodejs_express.js

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

var Client, https, querystring;

https = require('https'),
querystring = require('querystring');
 
app.get('/', function(req, res) {
    //res.send('Hello World');
    var params = [
        'client_id=',
        'response_type=code',
        'scope=r_profile',
        'display=pc'
    ];
    var url = 'https://mixi.jp/connect_authorize.pl?';
    res.redirect(url + params.join("&"));
});

app.get('/callback', function(req, res){
    res.send(res.req.query.code);
    var code = res.req.query.code;
    var callback = function(status, data){
    };
    var host = 'secure.mixi-platform.com';

    var request = https.request({
        'method': 'POST',
        'host': host,
        'path': '/2/token',
        'headers': {
            'Content-Type': 'application/x-www-form-urlencoded'
        }
    }, function (response) {
        var _data = '';
        response.setEncoding('utf8');
        response.on('data', function (data) {
            _data += data;
        });
        response.on('end', function () {
            if (_data && (_data[0] === '{' || _data[0] === '[')) {
                var data = JSON.parse(_data);
                callback(data.error || null, data);
            } else {
                callback(response.statusCode !== 200, _data || null);
            }
        });
    });
    var request_body = [
        'grant_type=authorization_code',
        'client_id=',
        'client_secret=',
        'code=' + code,
        'redirect_uri=http://localhost:3000/callback',
    ];
    request.write(request_body.join("&"));
    request.on('error', function (err) {
        callback(err);
    });
    request.end();
});
 
var port = process.env.PORT || 3000;
app.listen(port);