CDNTR – Image Optimization, Next-Gen Images (WebP/AVIF) & CDN Cache

Changelog

2.5.0

• Fixed: a converted image could be served although it was bigger than the original. The size check ran only in universal mode; it now runs on every page. A <source> also keeps every width of its image (the original stands in where there is no smaller copy), so a browser never jumps to a larger file.
• New: the dashboard’s Next-gen images (live) row tells WebP, AVIF and the original apart, and whether the CDN edge sent them, and says what to do next: choose WebP + AVIF (automatic) in your panel, turn on image optimization at the edge, or convert on this server.
• New: when the CDN edge already converts your images and local conversion is on too, the dashboard and the Images tab explain why that is wasted work and offer Let the CDN edge handle image formats. One click turns local conversion off and keeps your converted files; nothing is switched off without it. While your server makes AVIF copies and the edge sends WebP only, they suggest WebP + AVIF in your panel instead, and for image optimization on a delivery rule only, the dashboard offers the click once its live test sees the edge convert one of your uploads.
• New: the Images tab opens with where your image formats come from: this server, the CDN edge, or both.
• New: on a site connected to CDN.com.tr, the first-run offer recommends conversion at the CDN edge first, with conversion on your own server as the free alternative. It waits for the account check, so a site whose edge already converts is not offered it. Sites without an account get the same free offer as before.
• New: links to the image settings open your CDN.com.tr panel on the account this site is connected to, not on whichever account the panel had selected.
• Improved: in an AVIF <source>, a width without a smaller AVIF copy now offers its smaller WebP copy before the original.
• The account check now also reads whether image optimization is on for your CDN.com.tr account or a delivery rule, and whether AVIF is on. It only reads them: the connection key still clears your cache and nothing else.
• Fixed: dashboard links pointed at a Settings tab that no longer exists. They now open the Connection, CDN delivery, Images or Warm-up tab.
• Fixed: the next-gen row says “WebP and AVIF” when AVIF conversion is on.
• Removed an image-weight percentage we had not measured from the dashboard and the first-run offer.
• Fixed: the FAQ said an account is required. Converting images on your own server never needed one.
• Fixed: on WordPress 6.7 and later the bundled Turkish, Spanish, French, Russian, Arabic and Persian translations never loaded, so the plugin showed in English. A second, outdated registration pointed WordPress at a folder that does not exist.
• All new text is translated into Turkish, Spanish, French, Russian, Arabic and Persian.

2.4.0

• New: the health dashboard now measures four more things on the live connection instead of reading them from a setting — whether visitors really get HTTP/2, whether the TLS certificate actually covers the hostname and how long it has left, whether your CDN hostname is genuinely answered by our edge, and whether browsers asking for AVIF/WebP really receive it.
• Each finding says what to do next: the ones the plugin owns link straight to the setting, and the server-side ones link to the exact page in your CDN.com.tr panel.
• When this server’s PHP cannot perform a test (for example a cURL built without HTTP/2), the row says “not measured” instead of reporting a problem you do not have.
• Fixed: two “learn more” links in the dashboard pointed at pages that no longer exist.
• Fixed: a percent sign was shown twice in the WebP suggestion.
• All new text is translated into Turkish, Spanish, French, Russian, Arabic and Persian.

2.3.0

• New: a first-run offer. Installing a plugin and seeing nothing happen is a poor introduction, and next-gen image conversion — which needs no CDN account and runs entirely on your own server — shipped switched off, behind a tab you had to go and find. It is now offered once, on the screen you are already looking at, with a single button. Choosing “Not now” is remembered; nothing is switched on without you.
• The offer only appears when your server can actually create WebP, so it never asks for something that would fail.

2.2.0

• New: the plugin is fully translated into Turkish, Spanish, French, Russian, Arabic and Persian — all 155 strings, including the health-check diagnostics that explain what is wrong and how to fix it. Translations ship with the plugin, so they work as soon as you update; WordPress.org language packs, where they exist, still take precedence.
• Fix: two notices about your CDN package were hard-coded in Turkish and appeared that way to everyone, whatever their language.
• Fix: the package-expiry notice never fired. It compared an always-positive day count, so an expired package announced “less than 7 days remain” for a week after it had already lapsed, and the “expired” notice never showed at all.

2.1.1

• New: Optimization dashboard. The plugin page opens with a one-look health check of your whole delivery stack: is the CDN really serving your files (live edge test with cache HIT/MISS and timing), do you have a persistent object cache, is a page cache — or a conflicting second CDN plugin — active, and is anything blocking caching. Every row either fixes the issue in place or links you to exactly where it can be fixed.
• New: Connect to CDN.com.tr in one click. Press the button, approve the site in your own CDN.com.tr panel — the way you would connect a GitHub or Google account — and you are done. Nothing to copy, no password to type. Sites on CDN.com.tr WordPress hosting arrive connected already, and can be pointed at another account at any time.
• Security: the plugin no longer asks for your CDN.com.tr account password. Connecting issues a purge-only key that can clear your cache and nothing else, and any single site can be disconnected without touching the others.
• Security: your credentials are now verified on the server. They used to be sent from the browser, which exposed them to any script running on the admin page.
• The plugin screen is now one row of tabs — Optimization, Connection, CDN delivery, Images, Warm-up — instead of one long column of settings. Each tab has its own address, so a reload or a bookmark keeps you where you were, and saving one tab leaves the others untouched.
• The connection panel names the account the way your CDN.com.tr panel does, with the account ID kept underneath for support.
• The homepage check now tells the truth about HTML caching — and names the culprit. If your own theme or a plugin sends no-cache headers (or WordPress internally resolves your pages as 404s), the check says so with the exact file, instead of blaming your CDN settings; only when the origin is truly clean does it point at the CDN account.
• Fix: “Max pages to warm” is finally respected. The Warm cache now button asked for a fixed 200 pages and ignored the setting entirely.
• New: the Warm-up tab shows what warming actually did — every page it requested, the response it got, whether the CDN edge served it from cache, and how long it took, updating live while a run is in progress.
• Fix: approving the connection twice (a browser Back, a reload, a second tab) no longer reports the connection as invalid. A repeated approval is recognised, and a site that is already connected is told so instead of being shown an error.
• Fix: the plugin re-checks its connection once a day. A site whose credentials stopped being accepted used to go on claiming it was connected forever, while every purge failed in silence.
• A saved connection key is no longer printed back into the settings page; leave the field empty to keep the stored key.
• Sites on CDN.com.tr WordPress hosting connect themselves — no username, no key, nothing to enter.

2.0.0

A major release: CDNTR grows from a CDN URL rewriter + purge tool into a full CDN performance plugin — free next-gen images and CDN cache warm-up, all on-server and opt-in.
* New: Local next-gen images — optional on-server WebP (and AVIF where supported) conversion, served from the CDN via <picture> with the original as an automatic fallback. Background conversion on upload + a bulk converter for your existing media library (with progress and cancel). Runs on GD/Imagick — no per-image cloud fees, nothing leaves your server.
* New: Universal next-gen coverage — optionally next-gen every local image, not just the media library: theme and plugin images, and CSS background-image via image-set(). Understands page-optimizer image proxies so it still works alongside them.
* New: Smart size guard — a converted file is only served when it is actually smaller than the original (photos are never upgraded to a bigger WebP).
* New: CDN cache warm-up — keeps your CDN edge hot by pre-requesting cacheable pages, so visitors get a fast cached hit instead of a cold origin render. Fires automatically after a purge, batched so it never hammers your origin, and can warm desktop + mobile variants.
* New: Warns in the admin when another image-optimization plugin is active, to avoid double processing.
* Tested up to WordPress 7.0.

1.2.5

• Added async purge mode support for runtime-triggered invalidations
• Added coalesced purge queue with short window to reduce duplicate API calls
• Added lightweight purge telemetry counters for operational diagnostics
• Added purge mode/coalescing filters (cdntr_purge_mode, cdntr_purge_coalesce_window)

1.2.4

• Added built-in term change purge hooks (create/edit/delete) with focused taxonomy support
• Added built-in sitewide purge hooks for customizer and theme switch events
• Added short purge burst throttling for noisy event streams to reduce duplicate API calls
• Reduced need for site-specific CDNTR auto-purge mu-plugins by moving common logic into core plugin

1.2.3

• Security hardening for path-based purge normalization (control-char stripping, traversal-like path guard, length bound)
• Safer taxonomy purge handling by skipping invalid term links
• Improved delete-flow purge coverage by collecting related post/category/shop paths before deletion

1.2.2

• screenshots and assets added

1.2.1

• Minor security updates