Admin: ページの作成:「==asyncを使ったfunctionsのcacheサンプル== functions/index.js

 const functions = require('firebase-functions'); const admin = require('firebase-admin'); admi...」

2019-08-19T05:06:21Z

ページの作成:「==asyncを使ったfunctionsのcacheサンプル== functions/index.js <pre> const functions = require('firebase-functions'); const admin = require('firebase-admin'); admi...」

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==asyncを使ったfunctionsのcacheサンプル==
functions/index.js
<pre>
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
const cache = require('./cache.js');
exports.setCache = functions
.region('asia-northeast1')
.https.onRequest(async(request, response) => {
var id = request.query['id'];
var cachedata = request.query['cachedata'];
var retcachedata = await cache.setCache(admin, cachedata, id);
response.send("retcachedata=" + retcachedata);
});
exports.getCache = functions
.region('asia-northeast1')
.https.onRequest(async(request, response) => {
var id = request.query['id'];
var cachedata = request.query['cachedata'];
var cachelifesec = 60 * 60;
if (request.query['cachelifesec'] != null) {
cachelifesec = parseInt(request.query['cachelifesec']);
}
console.log('cachelifesec=' + cachelifesec);
var cachedata = await cache.getCache(admin, id, cachelifesec);
response.send("cachedata=" + cachedata);
});
</pre>

functions/cache.js
<pre>
/*
Cache設定例
const cache = require('./cache.js');
cache.registerCallbackSetCache(onCacheResponseSetCache);
var data = "hogehoge";
var data = await cache.setCache(admin, data, id);
return data; // hogehoge
Cache取得例(functionをasyncで宣言しておく)
const cache = require('./cache.js');
console.log('cachelifesec=' + cachelifesec);
var data = await cache.getCache(admin, id, cachelifesec);
response.send("data=" + data);
*/
exports.setCache = async function(admin, data, id) {
var date = new Date() ;
var unixtimems = date.getTime() ;
var unixtime = Math.floor( unixtimems / 1000 ) ;
console.log('unixtime=' + unixtime);
const cache = {
id: id,
data: data,
unixtime: unixtime,
};
var snapshot = await admin.firestore().collection('caches')
.doc(id).set(cache);
return "";
}
exports.getCache = async function(admin, id, cachelifesec) {
console.log('exports.getCache');
var date = new Date() ;
var unixtimems = date.getTime() ;
var unixtime = Math.floor( unixtimems / 1000 ) ;
console.log('unixtime=' + unixtime);
var unixtimecachelifesec = unixtime - cachelifesec;
console.log('cachelifesec=' + cachelifesec);
console.log('unixtimecachelifesec=' +unixtimecachelifesec);
var snapshot = await admin.firestore().collection('caches')
.where('id', '==', id)
.where('unixtime', '>', unixtimecachelifesec)
.limit(1)
.get();
var caches = snapshot.docs.map(x => x.data());
for (let i = 0; i < caches.length; i++) {
console.log("ret data=" + caches[i].data);
console.log("getCache cache=" + caches[i].data);
return caches[i].data;
}
console.log("getCache nasi");
return "";
}
</pre>

==httpアクセスで確認==
10秒でcacheが切れるサンプルurl
// cache設定
ttps://asia-northeast1-ほげほげ.cloudfunctions.net/setCache?id=hogeid&cachedata=dada1
// cache取得
ttps://asia-northeast1-ほげほげ.cloudfunctions.net/getCache?id=hogeid&cachelifesec=10

cacheはid別にfirestoreに格納される。

Gcp/Firebase/Firestore/cacheモジュール/async - 変更履歴

Admin: ページの作成:「==asyncを使ったfunctionsのcacheサンプル== functions/index.js
const functions = require('firebase-functions'); const admin = require('firebase-admin'); admi...」