perf(images): optimize high-traffic training assets

.github/workflows/build_master.yml

@@ -193,6 +193,7 @@ jobs:
             --manifest /tmp/s3-en-manifest.json \
             --remote-prefix en/
           aws s3 sync ./book s3://hacktricks-wiki/en --delete
+          bash scripts/upload_immutable_images.sh hacktricks-wiki en
 
       - name: Upload root sitemap index
         run: |

.github/workflows/translate_all.yml

@@ -76,7 +76,11 @@ jobs:
           wget -O compare_and_fix_refs.py https://raw.githubusercontent.com/HackTricks-wiki/hacktricks-cloud/master/scripts/compare_and_fix_refs.py
           wget -O translator.py https://raw.githubusercontent.com/HackTricks-wiki/hacktricks-cloud/master/scripts/translator.py
           cp mark_unchanged_s3_files.py /tmp/mark_unchanged_s3_files.py
+          cp upload_immutable_images.sh /tmp/upload_immutable_images.sh
           cd ..
+          mkdir -p /tmp/immutable-images
+          cp src/images/{hacktricks-summer-discount-2026-v1.webp,arte-badge-v1.webp,grte-badge-v1.webp,azrte-badge-v1.webp} /tmp/immutable-images/
+          cp theme/discount.js /tmp/discount.js
           wget -O /tmp/seo_postprocess.py https://raw.githubusercontent.com/HackTricks-wiki/hacktricks/master/scripts/seo_postprocess.py
 
       - name: Run get_and_save_refs.py
@@ -128,6 +132,8 @@ jobs:
           git checkout "$BRANCH"
           git pull
           MDBOOK_BOOK__LANGUAGE=$BRANCH mdbook build || (echo "Error logs" && cat hacktricks-preprocessor-error.log && echo "" && echo "" && echo "Debug logs" && (cat hacktricks-preprocessor.log | tail -n 20) && exit 1)
+          cp /tmp/immutable-images/* ./book/images/
+          cp /tmp/discount.js ./book/discount.js
 
       - name: Push search index to hacktricks-searchindex repo
         shell: bash
@@ -275,6 +281,7 @@ jobs:
             --manifest /tmp/s3-branch-manifest.json \
             --remote-prefix "$BRANCH/"
           aws s3 sync ./book s3://hacktricks-wiki/$BRANCH --delete
+          bash /tmp/upload_immutable_images.sh hacktricks-wiki "$BRANCH"
           echo "Sync completed"
           echo "Cat 3 files from the book"
           find . -type f -name 'index.html' -print | head -n 3 | xargs -r cat

scripts/upload_immutable_images.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ "$#" -ne 2 ]; then
+  echo "usage: $0 <bucket> <language-prefix>" >&2
+  exit 2
+fi
+
+bucket="$1"
+prefix="${2#/}"
+prefix="${prefix%/}"
+cache_control="public,max-age=31536000,immutable"
+
+for image in \
+  hacktricks-summer-discount-2026-v1.webp \
+  arte-badge-v1.webp \
+  grte-badge-v1.webp \
+  azrte-badge-v1.webp; do
+  source_path="./book/images/${image}"
+  if [ ! -f "$source_path" ]; then
+    echo "Missing immutable image: $source_path" >&2
+    exit 1
+  fi
+  key="${prefix}/images/${image}"
+  local_etag="\"$(md5sum "$source_path" | cut -d' ' -f1)\""
+  remote_state="$(aws s3api head-object \
+    --bucket "$bucket" \
+    --key "$key" \
+    --query '[ETag,CacheControl,ContentType]' \
+    --output text 2>/dev/null || true)"
+  read -r remote_etag remote_cache_control remote_content_type <<< "$remote_state"
+  if [ "$remote_etag" = "$local_etag" ] \
+    && [ "$remote_cache_control" = "$cache_control" ] \
+    && [ "$remote_content_type" = "image/webp" ]; then
+    echo "Immutable image already current: $key"
+    continue
+  fi
+  aws s3 cp "$source_path" "s3://${bucket}/${key}" \
+    --only-show-errors \
+    --content-type image/webp \
+    --cache-control "$cache_control"
+done

src/banners/hacktricks-training.md

@@ -1,7 +1,7 @@
 > [!TIP]
-> Learn & practice AWS Hacking:<img src="../../../../../images/arte.png" alt="" style="width:auto;height:24px;vertical-align:middle;">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://hacktricks-training.com/courses/arte)<img src="../../../../../images/arte.png" alt="" style="width:auto;height:24px;vertical-align:middle;">\
-> Learn & practice GCP Hacking: <img src="../../../../../images/grte.png" alt="" style="width:auto;height:24px;vertical-align:middle;">[**HackTricks Training GCP Red Team Expert (GRTE)**](https://hacktricks-training.com/courses/grte)<img src="../../../../../images/grte.png" alt="" style="width:auto;height:24px;vertical-align:middle;">\
-> Learn & practice Az Hacking: <img src="../../../../../images/azrte.png" alt="" style="width:auto;height:24px;vertical-align:middle;">[**HackTricks Training Azure Red Team Expert (AzRTE)**](https://hacktricks-training.com/courses/azrte)<img src="../../../../../images/azrte.png" alt="" style="width:auto;height:24px;vertical-align:middle;">\
+> Learn & practice AWS Hacking:<img src="../../../../../images/arte-badge-v1.webp" alt="" style="width:auto;height:24px;vertical-align:middle;">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://hacktricks-training.com/courses/arte)<img src="../../../../../images/arte-badge-v1.webp" alt="" style="width:auto;height:24px;vertical-align:middle;">\
+> Learn & practice GCP Hacking: <img src="../../../../../images/grte-badge-v1.webp" alt="" style="width:auto;height:24px;vertical-align:middle;">[**HackTricks Training GCP Red Team Expert (GRTE)**](https://hacktricks-training.com/courses/grte)<img src="../../../../../images/grte-badge-v1.webp" alt="" style="width:auto;height:24px;vertical-align:middle;">\
+> Learn & practice Az Hacking: <img src="../../../../../images/azrte-badge-v1.webp" alt="" style="width:auto;height:24px;vertical-align:middle;">[**HackTricks Training Azure Red Team Expert (AzRTE)**](https://hacktricks-training.com/courses/azrte)<img src="../../../../../images/azrte-badge-v1.webp" alt="" style="width:auto;height:24px;vertical-align:middle;">\
 > Browse the [**full HackTricks Training catalog**](https://hacktricks-training.com/courses/).
 >
 > <details>

theme/discount.js

@@ -2,7 +2,7 @@
   var CAMPAIGN_ID = "summer-" + new Date().getFullYear()
   var DISMISS_KEY = "htDiscountDismissedUntil:" + CAMPAIGN_ID
   var DISMISS_MS = 10 * 24 * 60 * 60 * 1000
-  var IMAGE_PATH = "images/hacktricks-summer-discount-2026.png"
+  var IMAGE_PATH = "images/hacktricks-summer-discount-2026-v1.webp"
   var TARGET_URL = "https://hacktricks-training.com"
   var TITLE = "HackTricks Training Summer Discount"