Du cache pour vos applications:

oui et sans Varnish

Slides 👉

Sylvain Combraque

Smersh co-author pentest tool

Træfik helper

Cache-handler maintainer

Open-source contributor

@darkweak

@darkweak_dev

Bricks

🚀 100M req/j

🇫🇷 French tech

👷 jobs@bricksfounders.com

🇫🇷 French tech

👷 rejoindre@nexflow.org

👷 wilfried.biston@nexflow.org

What does the cache word mean

Save temporary data from a source

Decrease the access time

A concrete example

A concrete example

Bonjour, j'aimerai savoir de quoi parle Harry Potter

Très bien, laissez-moi quelques secondes

A concrete example

A concrete example

C'est un roman fantastique qui traite de la magie

A concrete example

A concrete example

A concrete example

Bonjour, j'aimerai savoir de quoi parle Harry Potter

C'est un roman fantastique qui traite de la magie

A concrete example

In the IT world

Client

Interact with the cache

CDN provider

Reverse-proxy

Application

Client

Interact with the cache

CDN provider

Reverse-proxy

Application

HTTP headers Surrogate-keys, Cache-Tag, Edge-Cache-Tag, Cache-Tags

HTTP headers Cache-control, Expires, ETag

Ykeys, XKeys, internal system

internal system

Client

CDN provider

Reverse-proxy

Application

✅

Easy developer-level interactions

✅

✅

❌

❌

❌

❌

Application

Application

Pros

Cons

Own cache strategy

Application context

Re-implementation

Language dependant

Service storage dependant

No cache directives handling

Less performant than upper

PHP pool used

No CDN provider invalidation

Pros

Cons

HTTP normalized cache system

Service resolution

Between the reverse-proxy and the application

Invalidation request

Less CPU activity

Inside the deployed stack/pod

Language independent

No PHP pool used

No CDN provider invalidation

Inside the reverse-proxy

Pros

Cons

No service resolution

Reverse-proxy dependant

Invalidation request

Outside the deployed stack

Inside the reverse-proxy

No native CDN provider invalidation

What about GraphQL

GraphQL

RPC-like

GraphQL

GraphQL

{
  me {
    name
  }
}

http://myapi/graphql?query={me{name}}

{
  "query": "...",
  "operationName": "...",
  "variables": { "myVariable": "someValue", ... }
}

How to deal with that to cache the data

Has mutations ?

Generate a hash

Set hash as key part

GET-/my/graphql/endpoint?query={me{name}}

POST-/my/graphql/endpoint-{{ HASH }}

PUT-/my/graphql/endpoint-{{ HASH }}

DELETE-/my/graphql/endpoint-{{ HASH }}

Samples

Not really dry solution

Client-side solutions

urql

micro-graphql-react

Apollo

Section

Server-side solution

Feedbacks needed

I want a system to handle the CDN invalidation and the cache invalidation requests...

github.com/darkweak/Souin

Leave a ⭐️ on Github

default_cache:
  ttl: 10s

2 lines to configure

API & CDN

api:
  souin: {}

cdn:
  api_key: XXXX
  provider: fastly
  strategy: soft

Compatibility

One more thing

One more thing

composer require darkweak/souin-api-platform-bundle

One more thing

https://github.com/api-platform/core/pull/4540

Thank you for your attention

Questions ?