Add view metadata button for Lora cards.

modules/sd_models.py

@@ -210,6 +210,30 @@ def get_state_dict_from_checkpoint(pl_sd):
     return pl_sd
 
 
+def read_metadata_from_safetensors(filename):
+    import json
+
+    with open(filename, mode="rb") as file:
+        metadata_len = file.read(8)
+        metadata_len = int.from_bytes(metadata_len, "little")
+        json_start = file.read(2)
+
+        assert metadata_len > 2 and json_start in (b'{"', b"{'"), f"{filename} is not a safetensors file"
+        json_data = json_start + file.read(metadata_len-2)
+        json_obj = json.loads(json_data)
+
+        res = {}
+        for k, v in json_obj.get("__metadata__", {}).items():
+            res[k] = v
+            if isinstance(v, str) and v[0] == '{':
+                try:
+                    res[k] = json.loads(v)
+                except Exception as e:
+                    pass
+
+        return res
+
+
 def read_state_dict(checkpoint_file, print_global_state=False, map_location=None):
     _, extension = os.path.splitext(checkpoint_file)
     if extension.lower() == ".safetensors":

modules/ui_extra_networks.py

@@ -124,6 +124,12 @@ class ExtraNetworksPage:
         if onclick is None:
             onclick = '"' + html.escape(f"""return cardClicked({json.dumps(tabname)}, {item["prompt"]}, {"true" if self.allow_negative_prompt else "false"})""") + '"'
 
+        metadata_button = ""
+        metadata = item.get("metadata")
+        if metadata:
+            metadata_onclick = '"' + html.escape(f"""extraNetworksShowMetadata({json.dumps(metadata)}); return false;""") + '"'
+            metadata_button = f"<div class='metadata-button' title='Show metadata' onclick={metadata_onclick}></div>"
+
         args = {
             "preview_html": "style='background-image: url(\"" + html.escape(preview) + "\")'" if preview else '',
             "prompt": item.get("prompt", None),
@@ -134,6 +140,7 @@ class ExtraNetworksPage:
             "card_clicked": onclick,
             "save_card_preview": '"' + html.escape(f"""return saveCardPreview(event, {json.dumps(tabname)}, {json.dumps(item["local_preview"])})""") + '"',
             "search_term": item.get("search_term", ""),
+            "metadata_button": metadata_button,
         }
 
         return self.card_page.format(**args)