alex/handlebars-ipinfo
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Add caching of IP info

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Alex Janka 2017-06-02 21:47:17 +10:00
parent bc17ff8b7b
commit 0dfc40d2b0
1 changed files with 17 additions and 9 deletions
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24
index.ts
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@ -3,10 +3,12 @@ import expresshb = require('express-handlebars');
import http = require('http'); import http = require('http');
import https = require('https'); import https = require('https');
import Promise = require('promise'); import Promise = require('promise');
import HashMap = require('hashmap');
import { IPGeoJson } from './ip_geo'; import { IPGeoJson } from './ip_geo';
var app = express(); var app = express();
var cache = new HashMap();
app.engine('handlebars', expresshb({ defaultLayout: 'main' })); app.engine('handlebars', expresshb({ defaultLayout: 'main' }));
app.set('view engine', 'handlebars'); app.set('view engine', 'handlebars');
@ -15,12 +17,12 @@ app.get('/', function (req, res) {
getIpInfo("::ffff:" + "119.17.156.106").done(function (geoinfo: IPGeoJson) { getIpInfo("::ffff:" + "119.17.156.106").done(function (geoinfo: IPGeoJson) {
res.render('home', { res.render('home', {
helpers: { helpers: {
ip: function() { return geoinfo.ip; }, ip: function () { return geoinfo.ip; },
city: function() { return geoinfo.city; }, city: function () { return geoinfo.city; },
region: function() {return geoinfo.region; }, region: function () { return geoinfo.region; },
country: function() { return geoinfo.country; }, country: function () { return geoinfo.country; },
loc: function() { return geoinfo.loc; }, loc: function () { return geoinfo.loc; },
postal: function() { return geoinfo.postal } postal: function () { return geoinfo.postal }
} }
}); });
}); //replace with req.ip }); //replace with req.ip
@ -48,11 +50,17 @@ function getIpInfo(ip: String): Promise.IThenable<{}> {
}); });
response.on('end', function () { response.on('end', function () {
console.log(str); var result = <IPGeoJson>JSON.parse(str.slice(9));
resolve(<IPGeoJson>JSON.parse(str.slice(9))); cache.set(ip, result);
resolve(result);
}); });
} }
var cached = cache.get(ip);
if (cached != null) {
resolve(cached);
} else {
https.get(options, callback); https.get(options, callback);
}
}) })
} }