public async Task <JsonResult> fetchOpenGraph(string url)
{
if (string.IsNullOrEmpty(url))
{
return(new JsonResult(null));
}
if (!Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
{
return(new JsonResult(null));
}
if (uri.Scheme != Uri.UriSchemeHttp && uri.Scheme != Uri.UriSchemeHttps)
{
return(new JsonResult(null));
}
if (!(await _service.FetchOpenGraph(url) is OpenGraph og))
{
return(new JsonResult(null));
}
var output = new Dictionary <string, string>();
og.Metadata.Select(m => m.Value)
.Select(m => m.FirstOrDefault()).ToList()
.ForEach(meta => { output[meta.Name] = meta.Value; });
return(new JsonResult(output)
{
ContentType = "application/json",
StatusCode = StatusCodes.Status200OK
});
}