S147: dedup TMP + job/engine timeout + health RAM/disk + upload guard + richer errors

app.py

@@ -17,13 +17,6 @@ app = Flask(__name__)
 CORS(app)
 app.config["MAX_CONTENT_LENGTH"] = 512 * 1024 * 1024  # S146: 512MB — supports up to 200MB files
 
-TMP        = Path(tempfile.gettempdir())  # S147-fix: moved before JOBS block
-UPLOAD_DIR = TMP / "tilawa_uploads"
-CHUNK_DIR  = TMP / "tilawa_chunks"
-OUTPUT_DIR = TMP / "tilawa_outputs"
-for _d in [UPLOAD_DIR, CHUNK_DIR, OUTPUT_DIR]:
-    _d.mkdir(exist_ok=True)
-
 TMP        = Path(tempfile.gettempdir())  # S147-fix: moved before JOBS block
 UPLOAD_DIR = TMP / "tilawa_uploads"
 CHUNK_DIR  = TMP / "tilawa_chunks"
@@ -268,6 +261,9 @@ def upload():
     if "file" not in request.files:
         return jsonify({"error": "no file"}), 400
     content_length = request.content_length or 0
+    if content_length > 0 and not _check_disk_free(content_length * 2):
+        return jsonify({"error": "server disk full — try later"}), 503  # Imp-D
+    content_length = request.content_length or 0
     if content_length > 0 and not _check_disk_free(content_length * 2):
         return jsonify({"error": "server disk full — try later"}), 503  # Imp-D
     f      = request.files["file"]
@@ -425,6 +421,7 @@ def _run_engine(job_id):
                    "--iterations", "3"]
             for rf in ref_files[:3]: cmd += ["--ref", str(rf)]
             _ENGINE_TIMEOUT = 25 * 60  # Imp-B: 25min hard limit
+            _ENGINE_TIMEOUT = 25 * 60  # Imp-B: 25min hard limit
             proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                                     stderr=subprocess.STDOUT, text=True)
             engine_log = []