pytorrent/__init__.py

@@ -16,7 +16,7 @@ from .config import (
     SOCKETIO_CORS_ALLOWED_ORIGINS,
 )
 from .db import init_db
-from .services.frontend_assets import asset_path, bootstrap_css_path, static_hash, validate_offline_assets
+from .services.frontend_assets import asset_path, bootstrap_css_path, initialize_static_hash, static_hash, validate_offline_assets
 
 socketio = SocketIO(cors_allowed_origins=SOCKETIO_CORS_ALLOWED_ORIGINS, ping_timeout=30, async_mode="threading")
 
@@ -56,6 +56,7 @@ def register_error_pages(app: Flask) -> None:
 def create_app() -> Flask:
     validate_offline_assets()
     app = Flask(__name__)
+    initialize_static_hash(Path(app.static_folder or ""))
     from .logging_config import configure_logging
     configure_logging(app)
     if PROXY_FIX_ENABLE:
@@ -83,7 +84,7 @@ def create_app() -> Flask:
             path = Path(app.static_folder or "") / filename
             try:
                 path.stat()
-                # Note: A single static hash keeps module imports, CSS and local libraries on the same cache version.
+                # Note: A single JS/CSS hash keeps module imports, stylesheets and local libraries on the same cache version.
                 return url_for("static", filename=filename, v=current_static_hash())
             except OSError:
                 return url_for("static", filename=filename)

pytorrent/openapi/openapi.json

@@ -7499,8 +7499,8 @@
         "tags": [
           "System"
         ],
-        "summary": "Get static asset version hash",
-        "description": "Returns the current hash for app static assets. Clients can compare it with window.PYTORRENT.staticHash and reload when it changes.",
+        "summary": "Get current frontend JS/CSS hash",
+        "description": "Returns the startup-computed hash for app JavaScript and CSS assets. The value is kept in memory and returned without scanning static files per request.",
         "responses": {
           "200": {
             "description": "Static asset hash",
@@ -7513,10 +7513,12 @@
                       "type": "boolean"
                     },
                     "static_hash": {
-                      "type": "string"
+                      "type": "string",
+                      "description": "Short SHA-256-based hash of frontend JavaScript and CSS files computed once at app startup."
                     },
                     "version": {
-                      "type": "string"
+                      "type": "string",
+                      "description": "Alias of static_hash for simple client version checks."
                     }
                   }
                 }

pytorrent/routes/system.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
 from ._shared import *
-from flask import current_app
-from pathlib import Path
 from ..services import operation_logs
 from ..services.frontend_assets import static_hash
 
@@ -51,8 +49,8 @@ def system_status():
 
 @bp.get("/static_hash")
 def static_hash_get():
-    # Note: The frontend uses this lightweight version to detect changed static assets on mobile browsers.
-    value = static_hash(Path(current_app.static_folder or ""))
+    # Note: This returns the startup-computed JS/CSS version without scanning files per request.
+    value = static_hash()
     return ok({"static_hash": value, "version": value})
 
 

pytorrent/services/frontend_assets.py

@@ -190,34 +190,68 @@ def validate_offline_assets() -> None:
         )
 
 
-_STATIC_HASH_CACHE: dict[tuple[str, int], str] = {}
+_STATIC_HASH_VALUE = "dev"
+_STATIC_HASH_READY = False
 
-def static_hash(static_root: Path | None = None) -> str:
-    """Return one short hash for all app static files.
 
-    Note: This value is used as the shared browser-cache version, so any static file
-    change invalidates app.js imports, CSS and local frontend assets together.
+def _versioned_static_files(root: Path) -> list[Path]:
+    """Return static files that should invalidate frontend JS/CSS caches.
+
+    Note: Only JavaScript and CSS affect the executable frontend version. Images,
+    favicons and user-provided tracker icons stay outside this lightweight hash.
+    """
+    return [
+        path
+        for path in root.rglob("*")
+        if path.is_file()
+        and path.suffix.lower() in {".js", ".css"}
+        and "tracker_favicons" not in path.parts
+    ]
+
+
+def compute_static_hash(static_root: Path | None = None) -> str:
+    """Compute one short startup hash for frontend JavaScript and CSS files.
+
+    Note: This function reads JS/CSS files and should be called during app
+    startup, not from frequent request handlers.
     """
     import hashlib
 
     root = static_root or (BASE_DIR / "pytorrent" / "static")
-    files = [path for path in root.rglob("*") if path.is_file() and "tracker_favicons" not in path.parts]
-    fingerprint = f"{root}:{sum(path.stat().st_mtime_ns for path in files)}:{sum(path.stat().st_size for path in files)}"
-    cached = _STATIC_HASH_CACHE.get((fingerprint, len(files)))
-    if cached:
-        return cached
     digest = hashlib.sha256()
-    for path in sorted(files):
+    files = sorted(_versioned_static_files(root), key=lambda item: item.as_posix())
+    for path in files:
         rel = path.relative_to(root).as_posix()
-        stat = path.stat()
-        digest.update(rel.encode("utf-8"))
-        digest.update(str(stat.st_size).encode("ascii"))
-        digest.update(str(stat.st_mtime_ns).encode("ascii"))
         try:
-            digest.update(path.read_bytes())
+            stat = path.stat()
+            content = path.read_bytes()
         except OSError:
             continue
+        digest.update(rel.encode("utf-8"))
+        digest.update(str(stat.st_size).encode("ascii"))
+        digest.update(content)
     value = digest.hexdigest()[:16]
-    _STATIC_HASH_CACHE.clear()
-    _STATIC_HASH_CACHE[(fingerprint, len(files))] = value
-    return value
+    return value or "dev"
+
+
+def initialize_static_hash(static_root: Path | None = None) -> str:
+    """Compute and store the frontend static hash once for this process.
+
+    Note: The API endpoint and template helpers only return this in-memory value,
+    which keeps mobile version checks ultra-light.
+    """
+    global _STATIC_HASH_VALUE, _STATIC_HASH_READY
+    _STATIC_HASH_VALUE = compute_static_hash(static_root)
+    _STATIC_HASH_READY = True
+    return _STATIC_HASH_VALUE
+
+
+def static_hash(static_root: Path | None = None) -> str:
+    """Return the startup frontend static hash without rescanning files.
+
+    Note: The optional argument is kept for compatibility with existing callers;
+    it is only used for a lazy fallback before app startup initialization.
+    """
+    if not _STATIC_HASH_READY:
+        return initialize_static_hash(static_root)
+    return _STATIC_HASH_VALUE

pytorrent/static/js/app.js

@@ -99,9 +99,16 @@ async function loadModuleSources(){
   return moduleSourcesPromise;
 }
 
+function normalizeRuntimeSource(source){
+  const text = String(source || '');
+  // Note: Some generated source chunks may end with a literal \\n marker;
+  // normalize only this trailing marker to avoid invalid Function() source.
+  return text.endsWith('\\n') ? `${text.slice(0, -2)}\n` : text;
+}
+
 export async function buildRuntimeSource(){
   const sources = await loadModuleSources();
-  return `(() => {\n${sources.join('\n')}\n})();\n`;
+  return `(() => {\n${sources.map(normalizeRuntimeSource).join('\n')}\n})();\n`;
 }
 
 export async function startApp(){

pytorrent/static/js/bootstrapRuntime.js

@@ -1 +1 @@
-export const bootstrapRuntimeSource = "  async function checkStaticAssetVersion(){ try{ const r=await fetch('/api/static_hash',{cache:'no-store'}); const j=await r.json(); const current=String(window.PYTORRENT?.staticHash||''); const next=String(j.static_hash||j.version||''); if(current && next && current!==next){ window.PYTORRENT.staticHash=next; toast('A new frontend version is available. Reloading...','info'); setTimeout(()=>window.location.reload(), 600); } }catch(e){} }\n  setInterval(checkStaticAssetVersion, 120000);\n  window.addEventListener('focus', checkStaticAssetVersion);\n  updateSortHeaders(); setupColumnResizers(); applyColumnVisibility(); renderColumnManager(); restoreFooterStatusCache(); refreshFooterStatusNow(); renderFooterPreferences(); applyFooterPreferences(); updateFooterClock(); updateBrowserSpeedTitle(); setupTorrentDropZone(); setInterval(updateFooterClock,1000); scheduleRender(true); if(!hasActiveProfile) renderNoProfileState(); loadLabels().catch(()=>{}); loadRatios().catch(()=>{}); loadSmartQueue().catch(()=>{}); loadAutomations().catch(()=>{}); ensureDashboardToolsUI(); if(portCheckEnabled) loadPortCheck(false); else renderPortCheck({status:'disabled',enabled:false}); if(hasActiveProfile) applyDefaultDownloadPath(false).catch(()=>{}); if(hasActiveProfile) refreshUserDiskUsage(true).catch(()=>{}); scheduleTrackerSummary(true);\\n";
+export const bootstrapRuntimeSource = "  let lastStaticAssetVersionCheck=0;\n  async function checkStaticAssetVersion(force=false){ const now=Date.now(); if(!force && now-lastStaticAssetVersionCheck<60000) return; lastStaticAssetVersionCheck=now; try{ const r=await fetch('/api/static_hash',{cache:'no-store'}); const j=await r.json(); const current=String(window.PYTORRENT?.staticHash||''); const next=String(j.static_hash||j.version||''); if(current && next && current!==next){ window.PYTORRENT.staticHash=next; toast('A new frontend version is available. Reloading...','info'); setTimeout(()=>window.location.reload(), 600); } }catch(e){} }\n  setInterval(()=>checkStaticAssetVersion(true), 900000);\n  window.addEventListener('focus',()=>checkStaticAssetVersion(false));\n  updateSortHeaders(); setupColumnResizers(); applyColumnVisibility(); renderColumnManager(); restoreFooterStatusCache(); refreshFooterStatusNow(); renderFooterPreferences(); applyFooterPreferences(); updateFooterClock(); updateBrowserSpeedTitle(); setupTorrentDropZone(); setInterval(updateFooterClock,1000); scheduleRender(true); if(!hasActiveProfile) renderNoProfileState(); loadLabels().catch(()=>{}); loadRatios().catch(()=>{}); loadSmartQueue().catch(()=>{}); loadAutomations().catch(()=>{}); ensureDashboardToolsUI(); if(portCheckEnabled) loadPortCheck(false); else renderPortCheck({status:'disabled',enabled:false}); if(hasActiveProfile) applyDefaultDownloadPath(false).catch(()=>{}); if(hasActiveProfile) refreshUserDiskUsage(true).catch(()=>{}); scheduleTrackerSummary(true);\n";