more flexible DocumentingTemplateRenderer

gistfile1.py

class DocumentingTemplateRenderer:
    ...

    escape_binary = False
    
    def _escape_binary(self, content):
        if self.escape_binary and not all(char in string.printable for char in content):
            return '[%d bytes of binary content]' % len(content)
        return content
        
    def _get_content(self, view, request, obj, media_type):
        renderers = [renderer for renderer in view.renderers if not issubclass(renderer, DocumentingTemplateRenderer)]
        if not renderers:
            return '[No renderers were found]'

        media_type = add_media_type_param(media_type, 'indent', '4')
        content = renderers[0](view).render(obj, media_type)
        return self._escape_binary(content)

    ...