Fix variable name for gender/age model in configuration files and add hash validation for downloads without expected hash

Author: chrisdengso

compose/cpu.env

@@ -2,7 +2,7 @@ COMPOSE_PROJECT_NAME=insightface-rest
 IFR_VERSION=v0.8.4.0
 DET_NAME=yolov5l-face
 REC_NAME=w600k_r50
-GA_MODEL=None
+GA_NAME=None
 MASK_DETECTOR=None
 REC_BATCH_SIZE=1
 DET_BATCH_SIZE=1

compose/example.env

@@ -15,7 +15,7 @@ DET_NAME=yolov5l-face
 REC_NAME=w600k_r50
 
 # Gender/Age Model (None to disable, or 'genderage_v1')
-GA_MODEL=None
+GA_NAME=None
 
 # Face Mask Detection Model (None to disable, or 'mask_detector*')
 MASK_DETECTOR=None

if_rest/core/utils/download_google.py

@@ -27,6 +27,11 @@ def check_hash(filename, hash, algo='md5'):
         'sha256': hashlib.sha256,
         'sha512': hashlib.sha512,
     }
+    # No expected hash provided (e.g. models.json entry without an 'md5' field):
+    # nothing to verify against, so treat the download as valid.
+    if not hash:
+        return True
+
     hasher = algos[algo]()
     with open(filename, 'rb') as f:
         while True: