convert nodes_openai.py to V3 schema (#10604)

comfy_api_nodes/util/__init__.py

@@ -18,6 +18,8 @@ from .conversions import (
     tensor_to_base64_string,
     tensor_to_bytesio,
     tensor_to_pil,
+    text_filepath_to_base64_string,
+    text_filepath_to_data_uri,
     trim_video,
     video_to_base64_string,
 )
@@ -75,6 +77,8 @@ __all__ = [
     "tensor_to_base64_string",
     "tensor_to_bytesio",
     "tensor_to_pil",
+    "text_filepath_to_base64_string",
+    "text_filepath_to_data_uri",
     "trim_video",
     "video_to_base64_string",
     # Validation utilities

comfy_api_nodes/util/conversions.py

@@ -1,6 +1,7 @@
 import base64
 import logging
 import math
+import mimetypes
 import uuid
 from io import BytesIO
 from typing import Optional
@@ -12,7 +13,7 @@ from PIL import Image
 
 from comfy.utils import common_upscale
 from comfy_api.latest import Input, InputImpl
-from comfy_api.util import VideoContainer, VideoCodec
+from comfy_api.util import VideoCodec, VideoContainer
 
 from ._helpers import mimetype_to_extension
 
@@ -451,3 +452,19 @@ def resize_mask_to_image(
     if not allow_gradient:
         mask = (mask > 0.5).float()
     return mask
+
+
+def text_filepath_to_base64_string(filepath: str) -> str:
+    """Converts a text file to a base64 string."""
+    with open(filepath, "rb") as f:
+        file_content = f.read()
+    return base64.b64encode(file_content).decode("utf-8")
+
+
+def text_filepath_to_data_uri(filepath: str) -> str:
+    """Converts a text file to a data URI."""
+    base64_string = text_filepath_to_base64_string(filepath)
+    mime_type, _ = mimetypes.guess_type(filepath)
+    if mime_type is None:
+        mime_type = "application/octet-stream"
+    return f"data:{mime_type};base64,{base64_string}"