fix(web): Don't use random hashes for names, use file contents checksums

Author: tizoc

frontend/docker/startup.sh

@@ -113,29 +113,43 @@ download_wasm_files() {
     rm "/tmp/openmina-$OPENMINA_WASM_VERSION-webnode-wasm.tar.gz"
 }
 
+get_short_sha1() {
+    local file="$1"
+    if [ -z "$file" ]; then
+        echo "Usage: get_short_sha1 filename" >&2
+        return 1
+    fi
+    if [ ! -f "$file" ]; then
+        echo "Error: File not found: $file" >&2
+        return 1
+    fi
+    openssl sha1 "$file" | awk '{ print substr($2,1,8) }'
+}
+
 inject_caching_logic() {
   local js_file="$1"
   local index_html="$2"
   if [ -f "$js_file" ]; then
     echo "Injecting caching logic into $js_file"
 
-    # Generate a unique hash
-    local hash=$(openssl rand -hex 8)
+    # Generate checksum hashes
+    local js_file_hash=$(get_short_sha1 "$TARGET_DIR/openmina_node_web.js")
+    local wasm_file_hash=$(get_short_sha1 "$TARGET_DIR/openmina_node_web_bg.wasm")
 
-    # replace openmina_node_web_bg.wasm with openmina_node_web_bg.$hash.wasm
-    sed -i "s/openmina_node_web_bg.wasm/openmina_node_web_bg.$hash.wasm/g" "$js_file"
+    # replace openmina_node_web_bg.wasm with openmina_node_web_bg.$wasm_file_hash.wasm
+    sed -i "s/openmina_node_web_bg.wasm/openmina_node_web_bg.$wasm_file_hash.wasm/g" "$js_file"
 
     # add cache headers to fetch calls
     sed -i 's/module_or_path = fetch(module_or_path);/module_or_path = fetch(module_or_path, { cache: "force-cache", headers: { "Cache-Control": "max-age=31536000, immutable" } });/' "$js_file"
 
-    # rename openmina_node_web_bg.wasm to openmina_node_web_bg.$hash.wasm
-    mv "$TARGET_DIR/openmina_node_web_bg.wasm" "$TARGET_DIR/openmina_node_web_bg.$hash.wasm"
+    # rename openmina_node_web_bg.wasm to openmina_node_web_bg.$wasm_file_hash.wasm
+    mv "$TARGET_DIR/openmina_node_web_bg.wasm" "$TARGET_DIR/openmina_node_web_bg.$wasm_file_hash.wasm"
 
-    # rename openmina_node_web.js to openmina_node_web.$hash.js
-    mv "$TARGET_DIR/openmina_node_web.js" "$TARGET_DIR/openmina_node_web.$hash.js"
+    # rename openmina_node_web.js to openmina_node_web.$js_file_hash.js
+    mv "$TARGET_DIR/openmina_node_web.js" "$TARGET_DIR/openmina_node_web.$js_file_hash.js"
 
-    # replace openmina_node_web.js with openmina_node_web.$hash.js in index.html
-    sed -i "s/openmina_node_web.js/openmina_node_web.$hash.js/g" "$index_html"
+    # replace openmina_node_web.js with openmina_node_web.$js_file_hash.js in index.html
+    sed -i "s/openmina_node_web.js/openmina_node_web.$js_file_hash.js/g" "$index_html"
 
     if [[ $? -ne 0 ]]; then
       echo "Failed to inject caching logic into $js_file"