Push notification used Nifty Mobile Backend

nmb.js

'use strict';

var req = require("request");
var crypto = require("crypto");

exports.push = function(niftyAppKey, niftyClientKey, title, message) {
    const uri = "https://mb.api.cloud.nifty.com/2013-09-01/push";
    const timestamp = new Date().toISOString();
    const headers = {
        "X-NCMB-Application-Key": niftyAppKey,
        "X-NCMB-Signature": exports.generateSignature(niftyAppKey, niftyClientKey, uri, "POST", timestamp),
        "X-NCMB-Timestamp": timestamp,
        "Content-Type": "application/json"
    };
    const body = {
        immediateDeliveryFlag: true,
        target: ["android"],
        title: title,
        message: message
    };

    req.post(uri, {headers: headers, json: true, body: body}, function(error, response, body) {
        if (error) {
            console.warn(error);
        }
        return body;
    });
};

// source: http://mb.cloud.nifty.com/doc/current/rest/common/signature.html
exports.generateSignature = function(applicationKey, clientKey, url, method, timestamp) {
    var _applicationKey = applicationKey;
    var _timestamp = timestamp;
    var _clientKey = clientKey;

    var _method = method;
    var _url = encodeURI(url);
    var _tmp = _url.substring(_url.lastIndexOf("//") + 2);
    var _fqdn = _tmp.substring(0, _tmp.indexOf("/"));  

    var _position = _url.indexOf("?");
    var _path = "";
    var _data = {};

    if(_position == -1) {
        _path = _url.substring(_url.lastIndexOf(_fqdn) + _fqdn.length);
    }
    else {
        var _get_parameter= _url.substring(_position + 1).replace(/:/g , "%3A");
        _path = _url.substring(_url.lastIndexOf(_fqdn) + _fqdn.length, _position);
        _tmp = _get_parameter.split("&");
        for (var i = 0; i < _tmp.length; i++) {
        _position = _tmp[i].indexOf("=");
        _data[_tmp[i].substring(0 , _position)] = _tmp[i].substring(_position + 1);
        }
    }
    _data["SignatureMethod"] = "HmacSHA256";
    _data["SignatureVersion"] = "2";
    _data["X-NCMB-Application-Key"] = _applicationKey;
    _data["X-NCMB-Timestamp"] = _timestamp;

    var _sorted_data = {};
    var keys = [];
    var k, i, len;
    for (k in _data)
    {
        if (_data.hasOwnProperty(k))
        {
        keys.push(k);
        }
    }
    keys.sort();
    len = keys.length;
    for (i = 0; i < len; i++)
    {
        k = keys[i];
        _sorted_data[k] = _data[k];
    }
    var parameterString = "";
    for (k in _sorted_data)
    {
        if (_sorted_data.hasOwnProperty(k))
        {
        if (parameterString != "") {
            parameterString += "&";
        };
        parameterString = parameterString + k + "=" + _sorted_data[k]; 
        }
    }
    var forEncodeString = _method + "\n" + _fqdn + "\n" + _path + "\n" + parameterString;
    console.log(forEncodeString);
    var hash = crypto.createHmac("sha256", _clientKey).update(forEncodeString).digest();
    var signature = hash.toString("base64");
    return signature;
};

nmb_howtouse.js

var nifty = require("./nmb");

const appKey = "Nifty Cloud API application key";
const clientKey = "Nifty Cloud API client key";
nifty.push(appKey, clientKey, "push test", "body text")