Allow loading js extensions without copying to /web folder

nodes.py

@@ -1673,6 +1673,8 @@ NODE_DISPLAY_NAME_MAPPINGS = {
     "VAEEncodeTiled": "VAE Encode (Tiled)",
 }
 
+EXTENSION_WEB_DIRS = {}
+
 def load_custom_node(module_path, ignore=set()):
     module_name = os.path.basename(module_path)
     if os.path.isfile(module_path):
@@ -1681,11 +1683,20 @@ def load_custom_node(module_path, ignore=set()):
     try:
         if os.path.isfile(module_path):
             module_spec = importlib.util.spec_from_file_location(module_name, module_path)
+            module_dir = os.path.split(module_path)[0]
         else:
             module_spec = importlib.util.spec_from_file_location(module_name, os.path.join(module_path, "__init__.py"))
+            module_dir = module_path
+
         module = importlib.util.module_from_spec(module_spec)
         sys.modules[module_name] = module
         module_spec.loader.exec_module(module)
+
+        if hasattr(module, "WEB_DIRECTORY") and getattr(module, "WEB_DIRECTORY") is not None:
+            web_dir = os.path.abspath(os.path.join(module_dir, getattr(module, "WEB_DIRECTORY")))
+            if os.path.isdir(web_dir):
+                EXTENSION_WEB_DIRS[module_name] = web_dir
+
         if hasattr(module, "NODE_CLASS_MAPPINGS") and getattr(module, "NODE_CLASS_MAPPINGS") is not None:
             for name in module.NODE_CLASS_MAPPINGS:
                 if name not in ignore:

server.py

@@ -5,6 +5,7 @@ import nodes
 import folder_paths
 import execution
 import uuid
+import urllib
 import json
 import glob
 import struct
@@ -67,6 +68,8 @@ class PromptServer():
 
         mimetypes.init()
         mimetypes.types_map['.js'] = 'application/javascript; charset=utf-8'
+
+        self.supports = ["custom_nodes_from_web"]
         self.prompt_queue = None
         self.loop = loop
         self.messages = asyncio.Queue()
@@ -123,8 +126,18 @@ class PromptServer():
 
         @routes.get("/extensions")
         async def get_extensions(request):
-            files = glob.glob(os.path.join(self.web_root, 'extensions/**/*.js'), recursive=True)
+            files = glob.glob(os.path.join(
-            return web.json_response(list(map(lambda f: "/" + os.path.relpath(f, self.web_root).replace("\\", "/"), files)))
+                self.web_root, 'extensions/**/*.js'), recursive=True)
+            
+            extensions = list(map(lambda f: "/" + os.path.relpath(f, self.web_root).replace("\\", "/"), files))
+            
+            for name, dir in nodes.EXTENSION_WEB_DIRS.items():
+                files = glob.glob(os.path.join(dir, '**/*.js'), recursive=True)
+                extensions.extend(list(map(lambda f: "/extensions/" + urllib.parse.quote(
+                    name) + "/" + os.path.relpath(f, dir).replace("\\", "/"), files)))
+                print(extensions)
+
+            return web.json_response(extensions)
 
         def get_dir_by_type(dir_type):
             if dir_type is None:
@@ -492,6 +505,12 @@ class PromptServer():
         
     def add_routes(self):
         self.app.add_routes(self.routes)
+
+        for name, dir in nodes.EXTENSION_WEB_DIRS.items():
+            self.app.add_routes([
+                web.static('/extensions/' + urllib.parse.quote(name), dir, follow_symlinks=True),
+            ])
+
         self.app.add_routes([
             web.static('/', self.web_root, follow_symlinks=True),
         ])