test-googleapi-async.js

"use strict";

// node --harmony test-googleapi-async.js

const rp    = require('request-promise');
const util  = require('util');
const https  = require('https');

// https://developers.google.com/maps/documentation/timezone/start#get-a-key
let apiKey = 'AIzaSyCFljyx_4s3t6ldM5alxXPqcD7P9X6TYUM';

let coords = [[-22.681019,14.522226],[2.5724996,-27.8163698],[4.557567,4.6163235],[4.4254036,8.790334],[0.344051,9.4742473],[0.3834557,9.4475747],[-20.4457012,57.7176283],[0.3757385,9.4549369],[3.0552875716039662,9.964265981535153],[0.3546091,9.4734645],[89.9999999999996,0],[0.4093177,9.4320854],[0.470328,9.398915],[0.391981,9.4431912],[-1.1482112,8.6987966],[7.3679758,-24.2785494],[11.0904651,-28.864397],[0.40260293,9.43583089],[4.2393411,8.405862],[-22.008171379566193,35.3210552316159],[0.3718994,9.4592005],[6.3413884,3.3973382],[4.0709123,9.7037695],[4.9128139,-1.737505],[-20.174795,57.770134],[0.3711196,9.4582866],[0.3836682,9.4472672],[26.2327904,50.5381572],[-20.17276879,57.77063021],[-20.0052654,57.5698832],[4.443256666666667,8.027361666666668],[-20.28077,57.36534333333334],[41.40668487548828,2.2636919021606445],[-8.8092976,13.2176158],[5.9280853,4.89449403],[36.8870158,30.6961332],[-14.5560979,40.6389315],[0.4547487,9.4103139],[4.508393333333333,5.731486666666666],[0.4078287,9.4343803],[4.2394848,8.4058434],[-3.6318184,39.8528284],[0.3891227,9.4469423],[4.0224434,9.674068],[-20.161862,57.48276],[-25.661147,-3.5760599],[-20.194346734117662,57.77485045873086],[4.0452856,9.6853579],[4.0242022,9.6716989],[14.6703958,-17.4291602],[0.41337556,9.43007892],[38.6658891,-13.4166882],[-0.7155480486466558,8.785899534354341],[-6.8008208,39.2749647],[4.0278608,9.6690458],[34.7044382,11.2019092],[34.6989665,11.1837711],[4.0233697,9.6738892],[8.2671178,52.6161306],[14.6937045,-17.431749],[28.100398,-15.3330299],[0.3921684,9.4436481],[0.3852091,9.4466032],[0.4086274,9.4340278],[4.2393934,8.4058525],[4.0691126,9.6970186],[-20.149807,57.7452947],[0.373739,9.4585504],[4.0128018,9.1371751],[0.3891284,9.4441872],[-6.808211,39.274361],[-5.2457709,39.7676054],[6.3467699,3.3495372],[25.2553837,55.3005037],[5.3794716666666655,5.315219999999999],[4.0548401,9.663435],[11.546972,-28.2245931],[0.4503322,9.4119827],[4.059188,9.6730819],[4.6633832,8.5155406],[0.3993948,9.4409172],[-12.3401546,13.5603234],[26.22901,50.5444221],[4.5514947,8.4970228],[21.4848376,39.1613988],[24.4882985,54.4082796],[5.009851666666666,-1.6291966666666666],[33.2696554,35.2008451],[-4.073196666666666,39.66549166666667],[24.9847396,55.0207251],[-6.4107884,39.5731029],[-6.805693333333333,39.27234333333333],[-6.803351666666667,39.271715],[-6.0596716,12.2016703],[-4.0471078,39.6410887],[-6.8673871,39.2997569],[16.0418411,-16.5069434],[6.34557968,3.40957257],[0.3360811,9.4815019],[-4.03753,39.6797424],[-6.8067694,39.2752028],[8.4593067,-13.2780257],[-4.0421369,39.6178924],[6.1814557,-16.1641515],[-3.9529978,39.7474184],[40.5726049,-73.9970661],[-22.95328833333333,14.481209999999999],[5.4114908,5.3115299],[-4.0418166,39.6378197],[-6.8139711,39.2675653],[14.68594028,-17.43241637],[-20.0011347,57.662519],[26.227989,50.5434412],[4.5514889,8.4970345],[4.5514889,8.4970345],[23.688982268817433,58.16882835706525],[26.2146536,50.6053513],[24.1766799,52.5748924],[8.4930552,-13.2744074],[-4.0798705,39.6637405],[41.31028412,-72.0987622],[52.5444439,5.8562449],[59.3677767,18.0519377],[-6.80164494,39.28008441],[-4.0498288,39.6480635],[-4.0567674,39.6476442],[5.88176,4.8210659],[-6.802338,39.2766027],[-4.0414436,39.6357391],[23.8877406,58.7857982],[-5.3583123,39.6476788],[24.4423779,54.4260018],[-6.816799,39.2931032],[-22.9640454,14.4870015],[26.2309582,50.6533526],[-4.0744762,39.6668544],[-3.9523789,39.7429926],[33.673452,-78.866932],[-22.9667882,14.4863482],[-9.9724208,39.7082453],[-6.8198238,39.2969495],[2.4566998,-32.2471149],[4.9394168,-1.7050851],[-33.0181663,27.9155551],[4.89297,-1.7467916666666667],[25.485429999999997,-80.33752333333334],[30.6248865,-87.0316136],[5.0228111,118.3306736],[27.7738656,-97.3943785],[40.682154,-74.030346],[26.2173601,50.6025563],[29.2647605,-89.9564343],[27.96322246,-89.04858805],[29.3035231,-94.8193417],[30.5172703,-87.1727836],[45.0775226,-83.4741029],[30.27374171591796,-85.64833899467668],[43.6018807,-83.8811475],[-6.816315,39.2937071],[41.9094096,-83.3890141],[44.5176211,-68.8069158],[41.61600778,-71.41143862],[41.4840932,-71.3478555],[41.4271554,-82.3509127],[40.8100003,-73.8763014],[36.00427554,-75.65144892],[41.7661212,-71.3930253],[10.1975742,-64.6619967],[20.7494792,-105.445214],[59.9325929,30.2129843],[36.8867706,30.6963243],[-34.5360605,-58.4681889],[18.5607053,-93.4070011],[9.9796588,-83.0320322],[10.947393,108.241228]]; // end
let tsNow = new Date/1e3|0;

//let longjohn = require('longjohn');
//longjohn.async_trace_limit = 5;

(async () => {

    for (let i in coords) {
        let [lat, lng] = coords[i];

        let result = await getTz(lat, lng);

        console.log(
            "%s\t%s",
            result.status,
            result.status === 'OK' ? result.timeZoneId : ''
        );

        //await sleep(1000);
    }

})();

function getTz(lat, lng) {
    let url = 'https://maps.googleapis.com/maps/api/timezone/json'
            + '?location=' + lat + ',' + lng
            + '&timestamp=' + tsNow
            + '&key=' + apiKey;
    return fetch(url).then(tzData => {
        return tzData;
    }).catch(err => {
        return {status: err.message};
    });
}

function getTzRp(lat, lng) {
    return rp({
        uri     : 'https://maps.googleapis.com/maps/api/timezone/json',
        qs      : {
            location    : lat + ',' + lng,
            timestamp   : tsNow,
            key         : apiKey
        },
        json    : true
    }).then(tzData => {
        return tzData;
    }).catch(err => {
        return {status: err.message};
    });
}

function fetch(url) {
    // https://nodejs.org/api/https.html
    return new Promise(function(resolve, reject) {
        https.get(url, (res) => {
            const statusCode = res.statusCode;
            const contentType = res.headers['content-type'];

            let error;
            if (statusCode !== 200) {
                error = new Error(`Request Failed.\n` +
                    `Status Code: ${statusCode}`);
            } else if (!/^application\/json/.test(contentType)) {
                error = new Error(`Invalid content-type.\n` +
                    `Expected application/json but received ${contentType}`);
            }
            if (error) {
                // consume response data to free up memory
                res.resume();
                reject(error);
                return;
            }

            res.setEncoding('utf8');
            let rawData = '';
            res.on('data', (chunk) => rawData += chunk);
            res.on('end', () => {
                try {
                    let parsedData = JSON.parse(rawData);
                    resolve(parsedData);
                } catch (e) {
                    reject(e);
                }
            });
        }).on('error', (e) => {
            reject( new Error(`Got error: ${e.message}`) );
        });
    });

}

function sleep(ms = 0) {
    return new Promise(r => setTimeout(r, ms));
}