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changed so can send TTL and death TTL in query parameters

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Tanya Byrne
2020-08-24 13:49:15 +01:00
parent 8e1f9c6565
commit f6912ee221
2 changed files with 38 additions and 32 deletions
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68
api/src/middleware/cache.ts
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@@ -16,42 +16,46 @@ const redisClient = redis.createClient({
password: env.REDIS_PASSWORD,
});
const cacheMiddleware = (TTL: number, checkDeath: number) => {
asyncHandler(async (req, res, next) => {
// make the key of the cache the URL
// need to check that this will work for all endpoints
// node cache service
const key = req.url;
const cacheMiddleware: RequestHandler = asyncHandler(async (req, res, next) => {
// make the key of the cache the URL
// need to check that this will work for all endpoints
// node cache service
// we have two options here. Redis or node cache
if (env.CACHE_TYPE === 'redis') {
if (!redisClient) {
throw new RedisNotFoundException('Redis client does not exist');
}
if (!req.query.TTL) return next();
if (!req.query.dTTL) return next();
redisClient.get(key, (error, resultData) => {
if (error) {
throw new RedisNotFoundException('Error retreiving redis cache');
}
const key = req.url;
const TTL = req.query.TTL;
const checkDeath = req.query.dTTL;
if (resultData) {
res.send(resultData);
}
if (!resultData) {
// set data and then return
redisClient.setex(key, TTL, JSON.stringify(res.json));
}
});
} else {
// use the node cache
// set for ten minutes
const nodeCache = new CacheService(TTL, checkDeath);
nodeCache.getCache(key, JSON.stringify(res.json));
// we have two options here. Redis or node cache
if (env.CACHE_TYPE === 'redis') {
if (!redisClient) {
throw new RedisNotFoundException('Redis client does not exist');
}
return next();
});
};
redisClient.get(key, (error, resultData) => {
if (error) {
throw new RedisNotFoundException('Error retreiving redis cache');
}
if (resultData) {
res.send(resultData);
}
if (!resultData) {
// set data and then return
redisClient.setex(key, TTL, JSON.stringify(res.json));
}
});
} else {
// use the node cache
// set for ten minutes
const nodeCache = new CacheService(TTL, checkDeath);
nodeCache.getCache(key, JSON.stringify(res.json));
}
return next();
});
export default cacheMiddleware;