Swagger - bump DOMPurify version + add back Support local swagger bundle (good for airgapped environments) + support local swagger on custom root paths (#12911)

* fix(proxy_server.py): update swagger-ui-bundle.js + bring back swagger in airgapped environments

* fix(proxy_server.py): support local swagger on custom root path

enables on prem usage of litellm

litellm/proxy/proxy_server.py

@@ -877,21 +877,29 @@ app.add_middleware(
 
 app.add_middleware(PrometheusAuthMiddleware)
 
-swagger_path = os.path.join(current_dir, "swagger")
-router.mount("/swagger", StaticFiles(directory=swagger_path), name="swagger")
+
+def mount_swagger_ui():
+    swagger_directory = os.path.join(current_dir, "swagger")
+    swagger_path = "/" if server_root_path is None else server_root_path
+    if not swagger_path.endswith("/"):
+        swagger_path = swagger_path + "/"
+    custom_root_path_swagger_path = swagger_path + "swagger"
+
+    app.mount("/swagger", StaticFiles(directory=swagger_directory), name="swagger")
+
+    def swagger_monkey_patch(*args, **kwargs):
+        return get_swagger_ui_html(
+            *args,
+            **kwargs,
+            swagger_js_url=f"{custom_root_path_swagger_path}/swagger-ui-bundle.js",
+            swagger_css_url=f"{custom_root_path_swagger_path}/swagger-ui.css",
+            swagger_favicon_url=f"{custom_root_path_swagger_path}/favicon.png",
+        )
+
+    applications.get_swagger_ui_html = swagger_monkey_patch
 
 
-# def swagger_monkey_patch(*args, **kwargs):
-#     return get_swagger_ui_html(
-#         *args,
-#         **kwargs,
-#         swagger_js_url="/swagger/swagger-ui-bundle.js",
-#         swagger_css_url="/swagger/swagger-ui.css",
-#         swagger_favicon_url="/swagger/favicon.png",
-#     )
-
-
-# applications.get_swagger_ui_html = swagger_monkey_patch
+mount_swagger_ui()
 
 from typing import Dict
 
@@ -3671,7 +3679,7 @@ async def model_list(
     Use `/model/info` - to get detailed model information, example - pricing, mode, etc.
 
     This is just for compatibility with openai projects like aider.
-    
+
     Query Parameters:
     - include_metadata: Include additional metadata in the response with fallback information
     - fallback_type: Type of fallbacks to include ("general", "context_window", "content_policy")
@@ -3745,31 +3753,33 @@ async def model_list(
             "created": DEFAULT_MODEL_CREATED_AT_TIME,
             "owned_by": "openai",
         }
-        
+
         # Add metadata if requested
         if include_metadata:
             metadata = {}
-            
+
             # Default fallback_type to "general" if include_metadata is true
-            effective_fallback_type = fallback_type if fallback_type is not None else "general"
-            
+            effective_fallback_type = (
+                fallback_type if fallback_type is not None else "general"
+            )
+
             # Validate fallback_type
             valid_fallback_types = ["general", "context_window", "content_policy"]
             if effective_fallback_type not in valid_fallback_types:
                 raise HTTPException(
                     status_code=400,
-                    detail=f"Invalid fallback_type. Must be one of: {valid_fallback_types}"
+                    detail=f"Invalid fallback_type. Must be one of: {valid_fallback_types}",
                 )
-            
+
             fallbacks = get_all_fallbacks(
                 model=model,
                 llm_router=llm_router,
-                fallback_type=effective_fallback_type
+                fallback_type=effective_fallback_type,
             )
             metadata["fallbacks"] = fallbacks
-            
+
             model_info["metadata"] = metadata
-        
+
         model_data.append(model_info)
 
     return dict(