support model link in model_dir params

paddleocr.py

@@ -28,7 +28,7 @@ from ppocr.utils.logging import get_logger
 
 logger = get_logger()
 from ppocr.utils.utility import check_and_read_gif, get_image_file_list
-from ppocr.utils.network import maybe_download, download_with_progressbar
+from ppocr.utils.network import maybe_download, download_with_progressbar, is_link, confirm_model_dir_url
 from tools.infer.utility import draw_ocr, init_args, str2bool
 
 __all__ = ['PaddleOCR']
@@ -192,20 +192,19 @@ class PaddleOCR(predict_system.TextSystem):
                 'dict_path']
 
         # init model dir
-        if params.det_model_dir is None:
-            params.det_model_dir = os.path.join(BASE_DIR, VERSION,
-                                                            'det', det_lang)
-        if params.rec_model_dir is None:
-            params.rec_model_dir = os.path.join(BASE_DIR, VERSION,
-                                                            'rec', lang)
-        if params.cls_model_dir is None:
-            params.cls_model_dir = os.path.join(BASE_DIR, 'cls')
-        # download model
-        maybe_download(params.det_model_dir,
+        params.det_model_dir, det_url = confirm_model_dir_url(params.det_model_dir,
+                                                              os.path.join(BASE_DIR, VERSION, 'det', det_lang),
                                                               model_urls['det'][det_lang])
-        maybe_download(params.rec_model_dir,
+        params.rec_model_dir, rec_url = confirm_model_dir_url(params.rec_model_dir,
+                                                              os.path.join(BASE_DIR, VERSION, 'rec', lang),
                                                               model_urls['rec'][lang]['url'])
-        maybe_download(params.cls_model_dir, model_urls['cls'])
+        params.cls_model_dir, cls_url = confirm_model_dir_url(params.cls_model_dir,
+                                                              os.path.join(BASE_DIR, VERSION, 'cls'),
+                                                              model_urls['cls'])
+        # download model
+        maybe_download(params.det_model_dir, det_url)
+        maybe_download(params.rec_model_dir, rec_url)
+        maybe_download(params.cls_model_dir, cls_url)
 
         if params.det_algorithm not in SUPPORT_DET_MODEL:
             logger.error('det_algorithm must in {}'.format(SUPPORT_DET_MODEL))
@@ -277,7 +276,7 @@ def main():
     # for cmd
     args = parse_args(mMain=True)
     image_dir = args.image_dir
-    if image_dir.startswith('http'):
+    if is_link(image_dir):
         download_with_progressbar(image_dir, 'tmp.jpg')
         image_file_list = ['tmp.jpg']
     else: