Hi all, I have a question possibly more about s3fs than kedro, but at least it’s related 🙂 I’m trying to export a plotly image to s3 using

fig.write_html()

. So I made a simple custom dataset

class PlotlyHTMLDataSet(JSONDataSet):
    """Export plotly figure to html"""

    def _save(self, data: go.Figure) -> None:
        save_path = get_filepath_str(self._get_save_path(), self._protocol)

        with self._fs.open(save_path, **self._fs_open_args_save) as fs_file:
            data.write_html(fs_file, **self._save_args)

        self._invalidate_cache()

This worked fine… except the content-type of the html file on s3 “ends up” being “binary/octet-stream”, but should be “text/html”. This becomes a problem when trying to display this in a browser. Anyone got experience of args you could pass here to manually set the content type? Not my area of expertise. Thanks, Viveca

In your

self._fs.open(…

try adding

mode: 'wt'

so you’re writing text not binary

thanks for the suggestion. I’ll try!

so the only two paramters I can think to tweak here are

mode

and

encoding

(which only applies to text)

I’m slow on the response here 🙂 Actually it turns out this is not specific to the custom html dataset I had above. I get the same issue when putting a png on s3 using the matplotlibwriter dataset (it doesn’t get the right type, in this case something like “image/png”).