Save SVG - ComfyUI Built-in Node Documentation

class SaveSVGNode:
    """
    Save SVG files on disk.
    """

    def __init__(self):
        self.output_dir = folder_paths.get_output_directory()
        self.type = "output"
        self.prefix_append = ""

    RETURN_TYPES = ()
    DESCRIPTION = cleandoc(__doc__ or "")  # Handle potential None value
    FUNCTION = "save_svg"
    CATEGORY = "api node/image/Recraft"
    OUTPUT_NODE = True

    @classmethod
    def INPUT_TYPES(s):
        return {
            "required": {
                "svg": (RecraftIO.SVG,),
                "filename_prefix": ("STRING", {"default": "svg/ComfyUI", "tooltip": "The prefix for the file to save. This may include formatting information such as %date:yyyy-MM-dd% or %Empty Latent Image.width% to include values from nodes."})
            },
            "hidden": {
                "prompt": "PROMPT",
                "extra_pnginfo": "EXTRA_PNGINFO"
            }
        }

    def save_svg(self, svg: SVG, filename_prefix="svg/ComfyUI", prompt=None, extra_pnginfo=None):
        filename_prefix += self.prefix_append
        full_output_folder, filename, counter, subfolder, filename_prefix = folder_paths.get_save_image_path(filename_prefix, self.output_dir)
        results = list()

        # Prepare metadata JSON
        metadata_dict = {}
        if prompt is not None:
            metadata_dict["prompt"] = prompt
        if extra_pnginfo is not None:
            metadata_dict.update(extra_pnginfo)

        # Convert metadata to JSON string
        metadata_json = json.dumps(metadata_dict, indent=2) if metadata_dict else None

        for batch_number, svg_bytes in enumerate(svg.data):
            filename_with_batch_num = filename.replace("%batch_num%", str(batch_number))
            file = f"{filename_with_batch_num}_{counter:05}_.svg"

            # Read SVG content
            svg_bytes.seek(0)
            svg_content = svg_bytes.read().decode('utf-8')

            # Inject metadata if available
            if metadata_json:
                # Create metadata element with CDATA section
                metadata_element = f"""  <metadata>
    <![CDATA[
{metadata_json}
    ]]>
  </metadata>
"""
                # Insert metadata after opening svg tag using regex
                import re
                svg_content = re.sub(r'(<svg[^>]*>)', r'\1\n' + metadata_element, svg_content)

            # Write the modified SVG to file
            with open(os.path.join(full_output_folder, file), 'wb') as svg_file:
                svg_file.write(svg_content.encode('utf-8'))

            results.append({
                "filename": file,
                "subfolder": subfolder,
                "type": self.type
            })
            counter += 1
        return { "ui": { "images": results } }