[PATCH fb v1 0/6] Introducing cache for the Facebook scraper

[Ammar Faizi <ammarfaizi2@gnuweeb.org>]

Hi,

This series introduce a cache mechanism to speed up the web API
performance. It's very useful to reduce the pain when developing an
app that uses the API. It also greatly reduces the number of requests
to the same endpoint that happens in a short period of time.

There are 6 patches in this series:

Patch #1: Introduce `getCache()` and `setCache()`.
A preparation patch to implement better caching mechanism. All methods
that need cache will call these functions.

Patch #2: Replace old cache mechanism in `getTimelineYears()`.
Simplify the caching mechanism and make the `getTimelineYears()`
cache private to itself. This also means that the endpoint
"action=getTimelineYears" will utilize the cache.

Patch #3, #4: Implement cache in `getTimelinePosts()` and `getPost()`.
Make short repeated calls fast.

Patch #5: Introduce `clearExpiredCaches()`.
When a cache is expired, it won't be deleted unless getCache() with the
corresponding key is invoked. Introduce a new function to scan for
expired caches and delete them.

Patch #6: Create cron.php to clear cache.
Allow the server to clear expired caches via a small PHP script,
cron.php. Periodically calling clearExpiredCaches() will delete old
expired caches, it saves storage space.

Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---

The following changes since commit 0d5e59e00359e165778a81f80122bb522f8edb0f:

  Merge branch 'rewrite_url' (Facebook Onion rewrite support) (2023-05-03 18:46:47 +0700)

are available in the Git repository at:

  https://gitlab.torproject.org/ammarfaizi2/Facebook.git dev.cache

for you to fetch changes up to d30f2dad8ca761b5a9c8de32ea48adbbdd201d03:

  fb: web: Create cron.php to clear cache (2023-05-09 17:33:12 +0700)

----------------------------------------------------------------
Ammar Faizi (6):
      fb: Introduce `getCache()` and `setCache()` functions
      fb: Post: Replace old cache mechanism in `getTimelineYears()`
      fb: Post: Implement cache in `getPost()`
      fb: Post: Implement cache in `getTimelinePosts()`
      fb: cache: Introduce `clearExpiredCaches()`
      fb: web: Create cron.php to clear cache

 src/Facebook/Facebook.php     | 99 ++++++++++++++++++++++++++++++----------
 src/Facebook/Methods/Post.php | 74 ++++++++++--------------------
 web/cron.php                  |  9 ++++
 3 files changed, 108 insertions(+), 74 deletions(-)
 create mode 100644 web/cron.php

base-commit: 0d5e59e00359e165778a81f80122bb522f8edb0f
-- 
Ammar Faizi