Method send_image_with_metadata

server.py:1301–1336

(self, image_data, metadata=None, sid=None)

        await self.send_bytes(BinaryEventTypes.PREVIEW_IMAGE, preview_bytes, sid=sid)

    async def send_image_with_metadata(self, image_data, metadata=None, sid=None):
        image_type = image_data[0]
        image = image_data[1]
        max_size = image_data[2]
        if max_size is not None:
            if hasattr(Image, 'Resampling'):
                resampling = Image.Resampling.BILINEAR
            else:
                resampling = Image.Resampling.LANCZOS

            image = ImageOps.contain(image, (max_size, max_size), resampling)

        mimetype = "image/png" if image_type == "PNG" else "image/jpeg"

        # Prepare metadata
        if metadata is None:
            metadata = {}
        metadata["image_type"] = mimetype

        # Serialize metadata as JSON
        import json
        metadata_json = json.dumps(metadata).encode('utf-8')
        metadata_length = len(metadata_json)

        # Prepare image data
        bytesIO = BytesIO()
        image.save(bytesIO, format=image_type, quality=95, compress_level=1)
        image_bytes = bytesIO.getvalue()

        # Combine metadata and image
        combined_data = bytearray()
        combined_data.extend(struct.pack(">I", metadata_length))
        combined_data.extend(metadata_json)
        combined_data.extend(image_bytes)

        await self.send_bytes(BinaryEventTypes.PREVIEW_IMAGE_WITH_METADATA, combined_data, sid=sid)

    async def send_bytes(self, event, data, sid=None):
        message = self.encode_bytes(event, data)