docs: docstring update

eodag/plugins/download/http.py

@@ -446,7 +446,29 @@ def _stream_download_dict(
         timeout=DEFAULT_DOWNLOAD_TIMEOUT,
         **kwargs,
     ):
+        r"""
+        Returns dictionnary of :class:`~fastapi.responses.StreamingResponse` keyword-arguments.
+        It contains a generator to streamed download chunks and the response headers.
 
+        :param product: The EO product to download
+        :type product: :class:`~eodag.api.product._product.EOProduct`
+        :param auth: (optional) The configuration of a plugin of type Authentication
+        :type auth: :class:`~eodag.config.PluginConfig`
+        :param progress_callback: (optional) A progress callback
+        :type progress_callback: :class:`~eodag.utils.ProgressCallback`
+        :param wait: (optional) If download fails, wait time in minutes between two download tries
+        :type wait: int
+        :param timeout: (optional) If download fails, maximum time in minutes before stop retrying
+                        to download
+        :type timeout: int
+        :param kwargs: `outputs_prefix` (str), `extract` (bool), `delete_archive` (bool)
+                        and `dl_url_params` (dict) can be provided as additional kwargs
+                        and will override any other values defined in a configuration
+                        file or with environment variables.
+        :type kwargs: Union[str, bool, dict]
+        :returns: Dictionnary of :class:`~fastapi.responses.StreamingResponse` keyword-arguments
+        :rtype: dict
+        """
         # download assets if exist instead of remote_location
         if hasattr(product, "assets") and not getattr(
             self.config, "ignore_assets", False